/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 IntervalDomain -i ../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:36:07,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:36:07,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:36:07,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:36:07,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:36:07,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:36:07,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:36:07,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:36:07,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:36:07,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:36:07,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:36:07,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:36:07,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:36:07,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:36:07,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:36:07,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:36:07,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:36:07,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:36:07,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:36:07,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:36:07,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:36:07,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:36:07,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:36:07,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:36:07,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:36:07,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:36:07,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:36:07,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:36:07,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:36:07,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:36:07,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:36:07,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:36:07,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:36:07,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:36:07,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:36:07,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:36:07,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:36:07,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:36:07,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:36:07,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:36:07,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:36:07,685 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 [2023-03-31 23:36:07,699 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:36:07,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:36:07,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:36:07,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:36:07,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:36:07,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:36:07,700 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:36:07,700 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:36:07,700 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:36:07,700 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:36:07,700 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:36:07,701 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:36:07,701 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:36:07,701 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:36:07,701 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:36:07,701 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:36:07,701 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:36:07,701 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:36:07,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:36:07,702 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:36:07,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:36:07,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:36:07,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:36:07,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:36:07,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:36:07,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:36:07,702 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:36:07,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:36:07,703 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:36:07,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:36:07,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:36:07,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:36:07,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:36:07,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:36:07,703 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:36:07,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:36:07,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:36:07,703 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:36:07,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:36:07,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:36:07,704 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:36:07,704 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:36:07,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:36:07,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:36:07,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:36:07,926 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:36:07,927 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:36:07,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2023-03-31 23:36:09,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:36:09,551 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:36:09,552 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2023-03-31 23:36:09,565 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6446d2e76/8515ca7cf4aa40abbcaa8d228ec8e26c/FLAG57332cbcd [2023-03-31 23:36:09,576 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6446d2e76/8515ca7cf4aa40abbcaa8d228ec8e26c [2023-03-31 23:36:09,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:36:09,579 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:36:09,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:36:09,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:36:09,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:36:09,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:36:09" (1/1) ... [2023-03-31 23:36:09,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b3d487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:09, skipping insertion in model container [2023-03-31 23:36:09,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:36:09" (1/1) ... [2023-03-31 23:36:09,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:36:09,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:36:10,022 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_spec3_product27.cil.c[73003,73016] [2023-03-31 23:36:10,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:36:10,035 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:36:10,098 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_spec3_product27.cil.c[73003,73016] [2023-03-31 23:36:10,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:36:10,115 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:36:10,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10 WrapperNode [2023-03-31 23:36:10,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:36:10,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:36:10,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:36:10,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:36:10,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10" (1/1) ... [2023-03-31 23:36:10,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10" (1/1) ... [2023-03-31 23:36:10,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10" (1/1) ... [2023-03-31 23:36:10,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10" (1/1) ... [2023-03-31 23:36:10,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10" (1/1) ... [2023-03-31 23:36:10,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10" (1/1) ... [2023-03-31 23:36:10,217 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10" (1/1) ... [2023-03-31 23:36:10,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10" (1/1) ... [2023-03-31 23:36:10,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:36:10,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:36:10,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:36:10,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:36:10,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10" (1/1) ... [2023-03-31 23:36:10,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:36:10,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:10,310 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) [2023-03-31 23:36:10,380 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 [2023-03-31 23:36:10,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:36:10,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:36:10,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:36:10,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:36:10,405 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-03-31 23:36:10,405 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-03-31 23:36:10,405 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-03-31 23:36:10,405 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-03-31 23:36:10,405 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-03-31 23:36:10,405 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-03-31 23:36:10,405 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-03-31 23:36:10,405 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-03-31 23:36:10,406 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-03-31 23:36:10,406 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-03-31 23:36:10,406 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-03-31 23:36:10,406 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-03-31 23:36:10,406 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-03-31 23:36:10,406 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-03-31 23:36:10,406 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-03-31 23:36:10,406 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-03-31 23:36:10,406 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-03-31 23:36:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-03-31 23:36:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-03-31 23:36:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-03-31 23:36:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-03-31 23:36:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2023-03-31 23:36:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2023-03-31 23:36:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:36:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-03-31 23:36:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-03-31 23:36:10,409 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-03-31 23:36:10,409 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-03-31 23:36:10,409 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-03-31 23:36:10,409 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-03-31 23:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-03-31 23:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-03-31 23:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-03-31 23:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-03-31 23:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-03-31 23:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-03-31 23:36:10,411 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:36:10,411 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:36:10,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:36:10,411 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:36:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:36:10,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:36:10,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:36:10,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:36:10,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:36:10,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:36:10,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:36:10,413 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:36:10,413 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:36:10,414 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:36:10,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:36:10,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:36:10,414 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:36:10,414 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-03-31 23:36:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-03-31 23:36:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-03-31 23:36:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-03-31 23:36:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-03-31 23:36:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-03-31 23:36:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-03-31 23:36:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-03-31 23:36:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-03-31 23:36:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-03-31 23:36:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-03-31 23:36:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-03-31 23:36:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-03-31 23:36:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-03-31 23:36:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-03-31 23:36:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2023-03-31 23:36:10,420 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2023-03-31 23:36:10,420 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-03-31 23:36:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-03-31 23:36:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-03-31 23:36:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-03-31 23:36:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-03-31 23:36:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:36:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-03-31 23:36:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-03-31 23:36:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:36:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:36:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:36:10,427 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:36:10,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:36:10,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:36:10,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:36:10,630 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:36:10,645 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:36:11,600 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:36:12,203 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:36:12,203 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-03-31 23:36:12,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:36:12 BoogieIcfgContainer [2023-03-31 23:36:12,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:36:12,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:36:12,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:36:12,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:36:12,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:36:09" (1/3) ... [2023-03-31 23:36:12,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6791bb56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:36:12, skipping insertion in model container [2023-03-31 23:36:12,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:10" (2/3) ... [2023-03-31 23:36:12,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6791bb56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:36:12, skipping insertion in model container [2023-03-31 23:36:12,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:36:12" (3/3) ... [2023-03-31 23:36:12,212 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product27.cil.c [2023-03-31 23:36:12,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:36:12,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:36:12,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:36:12,273 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;@744ebab2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:36:12,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:36:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 600 states, 350 states have (on average 1.477142857142857) internal successors, (517), 373 states have internal predecessors, (517), 184 states have call successors, (184), 52 states have call predecessors, (184), 52 states have return successors, (184), 178 states have call predecessors, (184), 184 states have call successors, (184) [2023-03-31 23:36:12,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-03-31 23:36:12,291 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:12,292 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-03-31 23:36:12,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:12,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:12,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1401844118, now seen corresponding path program 1 times [2023-03-31 23:36:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39321954] [2023-03-31 23:36:12,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:12,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:36:13,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39321954] [2023-03-31 23:36:13,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39321954] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:13,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359194219] [2023-03-31 23:36:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:13,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:13,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:13,075 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) [2023-03-31 23:36:13,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:36:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:13,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 2698 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:36:13,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:36:13,714 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:13,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359194219] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:13,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:13,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-03-31 23:36:13,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108308334] [2023-03-31 23:36:13,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:13,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:36:13,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:13,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:36:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:13,744 INFO L87 Difference]: Start difference. First operand has 600 states, 350 states have (on average 1.477142857142857) internal successors, (517), 373 states have internal predecessors, (517), 184 states have call successors, (184), 52 states have call predecessors, (184), 52 states have return successors, (184), 178 states have call predecessors, (184), 184 states have call successors, (184) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-03-31 23:36:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:13,922 INFO L93 Difference]: Finished difference Result 1322 states and 2010 transitions. [2023-03-31 23:36:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:36:13,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 118 [2023-03-31 23:36:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:13,937 INFO L225 Difference]: With dead ends: 1322 [2023-03-31 23:36:13,938 INFO L226 Difference]: Without dead ends: 854 [2023-03-31 23:36:13,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:13,945 INFO L413 NwaCegarLoop]: 1130 mSDtfsCounter, 635 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:13,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1692 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:36:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2023-03-31 23:36:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 841. [2023-03-31 23:36:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 534 states have (on average 1.5168539325842696) internal successors, (810), 565 states have internal predecessors, (810), 225 states have call successors, (225), 83 states have call predecessors, (225), 81 states have return successors, (227), 216 states have call predecessors, (227), 219 states have call successors, (227) [2023-03-31 23:36:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1262 transitions. [2023-03-31 23:36:14,028 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1262 transitions. Word has length 118 [2023-03-31 23:36:14,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:14,029 INFO L495 AbstractCegarLoop]: Abstraction has 841 states and 1262 transitions. [2023-03-31 23:36:14,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-03-31 23:36:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1262 transitions. [2023-03-31 23:36:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-03-31 23:36:14,034 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:14,035 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-03-31 23:36:14,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:36:14,244 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,SelfDestructingSolverStorable0 [2023-03-31 23:36:14,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:14,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:14,244 INFO L85 PathProgramCache]: Analyzing trace with hash 726252172, now seen corresponding path program 1 times [2023-03-31 23:36:14,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:14,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118511364] [2023-03-31 23:36:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:36:14,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118511364] [2023-03-31 23:36:14,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118511364] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:14,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:14,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:36:14,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863189135] [2023-03-31 23:36:14,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:14,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:36:14,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:14,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:36:14,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:36:14,688 INFO L87 Difference]: Start difference. First operand 841 states and 1262 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-03-31 23:36:16,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:16,228 INFO L93 Difference]: Finished difference Result 3206 states and 4948 transitions. [2023-03-31 23:36:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:36:16,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 119 [2023-03-31 23:36:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:16,241 INFO L225 Difference]: With dead ends: 3206 [2023-03-31 23:36:16,241 INFO L226 Difference]: Without dead ends: 2396 [2023-03-31 23:36:16,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:36:16,245 INFO L413 NwaCegarLoop]: 1307 mSDtfsCounter, 1299 mSDsluCounter, 3793 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 5100 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:16,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 5100 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 23:36:16,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2023-03-31 23:36:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2313. [2023-03-31 23:36:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 1510 states have (on average 1.5278145695364238) internal successors, (2307), 1602 states have internal predecessors, (2307), 592 states have call successors, (592), 207 states have call predecessors, (592), 210 states have return successors, (665), 551 states have call predecessors, (665), 584 states have call successors, (665) [2023-03-31 23:36:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3564 transitions. [2023-03-31 23:36:16,344 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3564 transitions. Word has length 119 [2023-03-31 23:36:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:16,345 INFO L495 AbstractCegarLoop]: Abstraction has 2313 states and 3564 transitions. [2023-03-31 23:36:16,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-03-31 23:36:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3564 transitions. [2023-03-31 23:36:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-03-31 23:36:16,348 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:16,348 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-03-31 23:36:16,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:36:16,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:16,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash 379434117, now seen corresponding path program 1 times [2023-03-31 23:36:16,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:16,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845514095] [2023-03-31 23:36:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:36:16,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:16,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845514095] [2023-03-31 23:36:16,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845514095] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:16,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182069664] [2023-03-31 23:36:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:16,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:16,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:16,692 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) [2023-03-31 23:36:16,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:36:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:17,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:36:17,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:36:17,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:17,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182069664] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:17,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:17,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-31 23:36:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011751938] [2023-03-31 23:36:17,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:17,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:36:17,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:17,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:36:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:36:17,143 INFO L87 Difference]: Start difference. First operand 2313 states and 3564 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-03-31 23:36:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:17,294 INFO L93 Difference]: Finished difference Result 4444 states and 6914 transitions. [2023-03-31 23:36:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:36:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 121 [2023-03-31 23:36:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:17,305 INFO L225 Difference]: With dead ends: 4444 [2023-03-31 23:36:17,305 INFO L226 Difference]: Without dead ends: 2162 [2023-03-31 23:36:17,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:36:17,315 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 21 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:17,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1296 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:36:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2023-03-31 23:36:17,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 2150. [2023-03-31 23:36:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 1398 states have (on average 1.511444921316166) internal successors, (2113), 1483 states have internal predecessors, (2113), 554 states have call successors, (554), 197 states have call predecessors, (554), 197 states have return successors, (618), 516 states have call predecessors, (618), 546 states have call successors, (618) [2023-03-31 23:36:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3285 transitions. [2023-03-31 23:36:17,392 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3285 transitions. Word has length 121 [2023-03-31 23:36:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:17,393 INFO L495 AbstractCegarLoop]: Abstraction has 2150 states and 3285 transitions. [2023-03-31 23:36:17,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-03-31 23:36:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3285 transitions. [2023-03-31 23:36:17,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-03-31 23:36:17,395 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:17,395 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-03-31 23:36:17,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 23:36:17,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 23:36:17,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:17,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash -644119992, now seen corresponding path program 1 times [2023-03-31 23:36:17,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:17,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756780124] [2023-03-31 23:36:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:36:17,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:17,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756780124] [2023-03-31 23:36:17,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756780124] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:17,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989478425] [2023-03-31 23:36:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:17,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:17,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:17,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:36:18,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:36:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:18,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:36:18,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:36:18,521 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:18,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989478425] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:18,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:18,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-03-31 23:36:18,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335963845] [2023-03-31 23:36:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:18,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:36:18,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:36:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:18,523 INFO L87 Difference]: Start difference. First operand 2150 states and 3285 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-03-31 23:36:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:18,703 INFO L93 Difference]: Finished difference Result 5359 states and 8334 transitions. [2023-03-31 23:36:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:36:18,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 119 [2023-03-31 23:36:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:18,720 INFO L225 Difference]: With dead ends: 5359 [2023-03-31 23:36:18,720 INFO L226 Difference]: Without dead ends: 3240 [2023-03-31 23:36:18,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:18,729 INFO L413 NwaCegarLoop]: 1112 mSDtfsCounter, 622 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:18,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1661 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:36:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2023-03-31 23:36:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 3155. [2023-03-31 23:36:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 2064 states have (on average 1.5193798449612403) internal successors, (3136), 2194 states have internal predecessors, (3136), 803 states have call successors, (803), 282 states have call predecessors, (803), 287 states have return successors, (906), 749 states have call predecessors, (906), 795 states have call successors, (906) [2023-03-31 23:36:18,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 4845 transitions. [2023-03-31 23:36:18,899 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 4845 transitions. Word has length 119 [2023-03-31 23:36:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:18,900 INFO L495 AbstractCegarLoop]: Abstraction has 3155 states and 4845 transitions. [2023-03-31 23:36:18,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-03-31 23:36:18,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 4845 transitions. [2023-03-31 23:36:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-03-31 23:36:18,903 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:18,903 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-03-31 23:36:18,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:36:19,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:19,113 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:19,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -843305862, now seen corresponding path program 1 times [2023-03-31 23:36:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:19,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74575567] [2023-03-31 23:36:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:19,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:36:19,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:19,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74575567] [2023-03-31 23:36:19,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74575567] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:19,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852764240] [2023-03-31 23:36:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:19,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:19,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:36:19,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:36:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:19,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 23:36:19,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:36:20,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:20,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852764240] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:20,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:20,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2023-03-31 23:36:20,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576000658] [2023-03-31 23:36:20,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:20,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:36:20,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:36:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:36:20,128 INFO L87 Difference]: Start difference. First operand 3155 states and 4845 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-03-31 23:36:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:21,032 INFO L93 Difference]: Finished difference Result 8287 states and 12939 transitions. [2023-03-31 23:36:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:36:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 120 [2023-03-31 23:36:21,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:21,059 INFO L225 Difference]: With dead ends: 8287 [2023-03-31 23:36:21,060 INFO L226 Difference]: Without dead ends: 5163 [2023-03-31 23:36:21,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:36:21,079 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 517 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 2268 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:21,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 2268 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 23:36:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2023-03-31 23:36:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 5127. [2023-03-31 23:36:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5127 states, 3345 states have (on average 1.473542600896861) internal successors, (4929), 3568 states have internal predecessors, (4929), 1305 states have call successors, (1305), 473 states have call predecessors, (1305), 476 states have return successors, (1511), 1203 states have call predecessors, (1511), 1295 states have call successors, (1511) [2023-03-31 23:36:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5127 states to 5127 states and 7745 transitions. [2023-03-31 23:36:21,272 INFO L78 Accepts]: Start accepts. Automaton has 5127 states and 7745 transitions. Word has length 120 [2023-03-31 23:36:21,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:21,272 INFO L495 AbstractCegarLoop]: Abstraction has 5127 states and 7745 transitions. [2023-03-31 23:36:21,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-03-31 23:36:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5127 states and 7745 transitions. [2023-03-31 23:36:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-03-31 23:36:21,276 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:21,277 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:21,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-31 23:36:21,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:21,487 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:21,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash -770561907, now seen corresponding path program 1 times [2023-03-31 23:36:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:21,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590816605] [2023-03-31 23:36:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:21,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 23:36:22,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590816605] [2023-03-31 23:36:22,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590816605] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:22,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:22,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-31 23:36:22,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357428428] [2023-03-31 23:36:22,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:22,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:36:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:36:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:36:22,233 INFO L87 Difference]: Start difference. First operand 5127 states and 7745 transitions. Second operand has 10 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (25), 5 states have call predecessors, (25), 3 states have call successors, (25) [2023-03-31 23:36:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:24,312 INFO L93 Difference]: Finished difference Result 18568 states and 28812 transitions. [2023-03-31 23:36:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 23:36:24,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (25), 5 states have call predecessors, (25), 3 states have call successors, (25) Word has length 125 [2023-03-31 23:36:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:24,387 INFO L225 Difference]: With dead ends: 18568 [2023-03-31 23:36:24,388 INFO L226 Difference]: Without dead ends: 13472 [2023-03-31 23:36:24,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-03-31 23:36:24,418 INFO L413 NwaCegarLoop]: 1311 mSDtfsCounter, 1296 mSDsluCounter, 7996 mSDsCounter, 0 mSdLazyCounter, 2659 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 9307 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:24,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1319 Valid, 9307 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2659 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-31 23:36:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13472 states. [2023-03-31 23:36:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13472 to 13143. [2023-03-31 23:36:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13143 states, 8811 states have (on average 1.481216660991942) internal successors, (13051), 9335 states have internal predecessors, (13051), 3169 states have call successors, (3169), 1146 states have call predecessors, (3169), 1162 states have return successors, (4036), 2870 states have call predecessors, (4036), 3152 states have call successors, (4036) [2023-03-31 23:36:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13143 states to 13143 states and 20256 transitions. [2023-03-31 23:36:25,031 INFO L78 Accepts]: Start accepts. Automaton has 13143 states and 20256 transitions. Word has length 125 [2023-03-31 23:36:25,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:25,031 INFO L495 AbstractCegarLoop]: Abstraction has 13143 states and 20256 transitions. [2023-03-31 23:36:25,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (25), 5 states have call predecessors, (25), 3 states have call successors, (25) [2023-03-31 23:36:25,032 INFO L276 IsEmpty]: Start isEmpty. Operand 13143 states and 20256 transitions. [2023-03-31 23:36:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-03-31 23:36:25,034 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:25,034 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-03-31 23:36:25,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 23:36:25,035 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:25,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:25,035 INFO L85 PathProgramCache]: Analyzing trace with hash -637073212, now seen corresponding path program 1 times [2023-03-31 23:36:25,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:25,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147368898] [2023-03-31 23:36:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:25,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 23:36:25,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147368898] [2023-03-31 23:36:25,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147368898] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151969997] [2023-03-31 23:36:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:25,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:25,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:25,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:36:25,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:36:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:25,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-31 23:36:25,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 23:36:26,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:26,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151969997] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:26,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:26,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 13 [2023-03-31 23:36:26,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601088090] [2023-03-31 23:36:26,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:26,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:36:26,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:36:26,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:36:26,036 INFO L87 Difference]: Start difference. First operand 13143 states and 20256 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-03-31 23:36:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:27,494 INFO L93 Difference]: Finished difference Result 27550 states and 42445 transitions. [2023-03-31 23:36:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:36:27,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 131 [2023-03-31 23:36:27,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:27,562 INFO L225 Difference]: With dead ends: 27550 [2023-03-31 23:36:27,562 INFO L226 Difference]: Without dead ends: 14438 [2023-03-31 23:36:27,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:36:27,609 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 1155 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:27,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 1982 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 23:36:27,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14438 states. [2023-03-31 23:36:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14438 to 14391. [2023-03-31 23:36:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14391 states, 9736 states have (on average 1.4641536565324569) internal successors, (14255), 10288 states have internal predecessors, (14255), 3393 states have call successors, (3393), 1259 states have call predecessors, (3393), 1261 states have return successors, (4292), 3052 states have call predecessors, (4292), 3376 states have call successors, (4292) [2023-03-31 23:36:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14391 states to 14391 states and 21940 transitions. [2023-03-31 23:36:28,207 INFO L78 Accepts]: Start accepts. Automaton has 14391 states and 21940 transitions. Word has length 131 [2023-03-31 23:36:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:28,208 INFO L495 AbstractCegarLoop]: Abstraction has 14391 states and 21940 transitions. [2023-03-31 23:36:28,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-03-31 23:36:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 14391 states and 21940 transitions. [2023-03-31 23:36:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-03-31 23:36:28,210 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:28,210 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-03-31 23:36:28,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:36:28,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:28,418 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:28,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:28,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2124902349, now seen corresponding path program 1 times [2023-03-31 23:36:28,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:28,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958379852] [2023-03-31 23:36:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:28,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-03-31 23:36:28,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:28,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958379852] [2023-03-31 23:36:28,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958379852] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:28,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:28,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-31 23:36:28,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971324916] [2023-03-31 23:36:28,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:28,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:36:28,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:28,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:36:28,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:36:28,763 INFO L87 Difference]: Start difference. First operand 14391 states and 21940 transitions. Second operand has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 7 states have internal predecessors, (65), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2023-03-31 23:36:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:29,540 INFO L93 Difference]: Finished difference Result 26768 states and 41035 transitions. [2023-03-31 23:36:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:36:29,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 7 states have internal predecessors, (65), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) Word has length 136 [2023-03-31 23:36:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:29,622 INFO L225 Difference]: With dead ends: 26768 [2023-03-31 23:36:29,622 INFO L226 Difference]: Without dead ends: 14645 [2023-03-31 23:36:29,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:36:29,667 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 33 mSDsluCounter, 5231 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 5892 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:29,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 5892 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:36:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14645 states. [2023-03-31 23:36:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14645 to 14645. [2023-03-31 23:36:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14645 states, 9906 states have (on average 1.456188168786594) internal successors, (14425), 10458 states have internal predecessors, (14425), 3403 states have call successors, (3403), 1259 states have call predecessors, (3403), 1335 states have return successors, (4455), 3136 states have call predecessors, (4455), 3386 states have call successors, (4455) [2023-03-31 23:36:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14645 states to 14645 states and 22283 transitions. [2023-03-31 23:36:30,282 INFO L78 Accepts]: Start accepts. Automaton has 14645 states and 22283 transitions. Word has length 136 [2023-03-31 23:36:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:30,282 INFO L495 AbstractCegarLoop]: Abstraction has 14645 states and 22283 transitions. [2023-03-31 23:36:30,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 7 states have internal predecessors, (65), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2023-03-31 23:36:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 14645 states and 22283 transitions. [2023-03-31 23:36:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-03-31 23:36:30,285 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:30,285 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2023-03-31 23:36:30,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 23:36:30,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:30,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:30,285 INFO L85 PathProgramCache]: Analyzing trace with hash -593278817, now seen corresponding path program 1 times [2023-03-31 23:36:30,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:30,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141156552] [2023-03-31 23:36:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:30,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 23:36:30,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:30,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141156552] [2023-03-31 23:36:30,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141156552] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:30,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:30,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-03-31 23:36:30,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783596786] [2023-03-31 23:36:30,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:30,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 23:36:30,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 23:36:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-03-31 23:36:30,866 INFO L87 Difference]: Start difference. First operand 14645 states and 22283 transitions. Second operand has 14 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 5 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2023-03-31 23:36:35,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:35,585 INFO L93 Difference]: Finished difference Result 37129 states and 57584 transitions. [2023-03-31 23:36:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-31 23:36:35,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 5 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 140 [2023-03-31 23:36:35,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:35,687 INFO L225 Difference]: With dead ends: 37129 [2023-03-31 23:36:35,687 INFO L226 Difference]: Without dead ends: 26020 [2023-03-31 23:36:35,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2023-03-31 23:36:35,727 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 2311 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 8066 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2427 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 9113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1047 IncrementalHoareTripleChecker+Valid, 8066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:35,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2427 Valid, 1395 Invalid, 9113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1047 Valid, 8066 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-03-31 23:36:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26020 states. [2023-03-31 23:36:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26020 to 25431. [2023-03-31 23:36:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25431 states, 17312 states have (on average 1.4625115526802217) internal successors, (25319), 18259 states have internal predecessors, (25319), 5753 states have call successors, (5753), 2164 states have call predecessors, (5753), 2365 states have return successors, (7897), 5357 states have call predecessors, (7897), 5727 states have call successors, (7897) [2023-03-31 23:36:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25431 states to 25431 states and 38969 transitions. [2023-03-31 23:36:37,178 INFO L78 Accepts]: Start accepts. Automaton has 25431 states and 38969 transitions. Word has length 140 [2023-03-31 23:36:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:37,179 INFO L495 AbstractCegarLoop]: Abstraction has 25431 states and 38969 transitions. [2023-03-31 23:36:37,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 5 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2023-03-31 23:36:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 25431 states and 38969 transitions. [2023-03-31 23:36:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-03-31 23:36:37,182 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:37,182 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2023-03-31 23:36:37,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 23:36:37,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:37,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:37,182 INFO L85 PathProgramCache]: Analyzing trace with hash 386205554, now seen corresponding path program 1 times [2023-03-31 23:36:37,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:37,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722107445] [2023-03-31 23:36:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:37,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-03-31 23:36:37,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722107445] [2023-03-31 23:36:37,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722107445] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:37,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:37,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:36:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656656229] [2023-03-31 23:36:37,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:37,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:36:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:36:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:36:37,673 INFO L87 Difference]: Start difference. First operand 25431 states and 38969 transitions. Second operand has 8 states, 6 states have (on average 12.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2023-03-31 23:36:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:39,104 INFO L93 Difference]: Finished difference Result 36676 states and 56334 transitions. [2023-03-31 23:36:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:36:39,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 12.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 167 [2023-03-31 23:36:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:39,236 INFO L225 Difference]: With dead ends: 36676 [2023-03-31 23:36:39,237 INFO L226 Difference]: Without dead ends: 25521 [2023-03-31 23:36:39,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:39,282 INFO L413 NwaCegarLoop]: 736 mSDtfsCounter, 525 mSDsluCounter, 4110 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 4846 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:39,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 4846 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 23:36:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25521 states. [2023-03-31 23:36:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25521 to 25473. [2023-03-31 23:36:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25473 states, 17326 states have (on average 1.4621378275424217) internal successors, (25333), 18273 states have internal predecessors, (25333), 5767 states have call successors, (5767), 2164 states have call predecessors, (5767), 2379 states have return successors, (7897), 5385 states have call predecessors, (7897), 5741 states have call successors, (7897) [2023-03-31 23:36:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25473 states to 25473 states and 38997 transitions. [2023-03-31 23:36:40,711 INFO L78 Accepts]: Start accepts. Automaton has 25473 states and 38997 transitions. Word has length 167 [2023-03-31 23:36:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:40,712 INFO L495 AbstractCegarLoop]: Abstraction has 25473 states and 38997 transitions. [2023-03-31 23:36:40,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 12.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2023-03-31 23:36:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 25473 states and 38997 transitions. [2023-03-31 23:36:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-03-31 23:36:40,717 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:40,717 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2023-03-31 23:36:40,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 23:36:40,718 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:40,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:40,718 INFO L85 PathProgramCache]: Analyzing trace with hash 23228167, now seen corresponding path program 1 times [2023-03-31 23:36:40,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:40,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197507886] [2023-03-31 23:36:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-03-31 23:36:41,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:41,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197507886] [2023-03-31 23:36:41,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197507886] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:41,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:41,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-03-31 23:36:41,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420996353] [2023-03-31 23:36:41,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:41,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 23:36:41,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:41,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 23:36:41,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2023-03-31 23:36:41,502 INFO L87 Difference]: Start difference. First operand 25473 states and 38997 transitions. Second operand has 14 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 5 states have call successors, (39), 5 states have call predecessors, (39), 6 states have return successors, (32), 6 states have call predecessors, (32), 4 states have call successors, (32) [2023-03-31 23:36:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:47,935 INFO L93 Difference]: Finished difference Result 51701 states and 82105 transitions. [2023-03-31 23:36:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-03-31 23:36:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 5 states have call successors, (39), 5 states have call predecessors, (39), 6 states have return successors, (32), 6 states have call predecessors, (32), 4 states have call successors, (32) Word has length 171 [2023-03-31 23:36:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:48,226 INFO L225 Difference]: With dead ends: 51701 [2023-03-31 23:36:48,226 INFO L226 Difference]: Without dead ends: 51670 [2023-03-31 23:36:48,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=1654, Unknown=0, NotChecked=0, Total=1892 [2023-03-31 23:36:48,267 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 3019 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 10175 mSolverCounterSat, 1274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3131 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 11449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1274 IncrementalHoareTripleChecker+Valid, 10175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:48,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3131 Valid, 2126 Invalid, 11449 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1274 Valid, 10175 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 23:36:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51670 states. [2023-03-31 23:36:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51670 to 50094. [2023-03-31 23:36:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50094 states, 35686 states have (on average 1.4847279045003643) internal successors, (52984), 37104 states have internal predecessors, (52984), 9918 states have call successors, (9918), 4025 states have call predecessors, (9918), 4489 states have return successors, (14956), 9455 states have call predecessors, (14956), 9883 states have call successors, (14956) [2023-03-31 23:36:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50094 states to 50094 states and 77858 transitions. [2023-03-31 23:36:50,934 INFO L78 Accepts]: Start accepts. Automaton has 50094 states and 77858 transitions. Word has length 171 [2023-03-31 23:36:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:50,935 INFO L495 AbstractCegarLoop]: Abstraction has 50094 states and 77858 transitions. [2023-03-31 23:36:50,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 5 states have call successors, (39), 5 states have call predecessors, (39), 6 states have return successors, (32), 6 states have call predecessors, (32), 4 states have call successors, (32) [2023-03-31 23:36:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 50094 states and 77858 transitions. [2023-03-31 23:36:50,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-03-31 23:36:50,943 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:50,943 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:50,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 23:36:50,943 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:50,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:50,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1162812281, now seen corresponding path program 1 times [2023-03-31 23:36:50,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:50,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79245795] [2023-03-31 23:36:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:50,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-03-31 23:36:51,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79245795] [2023-03-31 23:36:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79245795] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783281339] [2023-03-31 23:36:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:51,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:51,338 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:36:51,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:36:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:52,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 3141 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 23:36:52,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-03-31 23:36:52,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:52,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783281339] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:52,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:52,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2023-03-31 23:36:52,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862820837] [2023-03-31 23:36:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:52,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:36:52,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:36:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-03-31 23:36:52,238 INFO L87 Difference]: Start difference. First operand 50094 states and 77858 transitions. Second operand has 9 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 5 states have call successors, (46), 4 states have call predecessors, (46), 6 states have return successors, (39), 5 states have call predecessors, (39), 5 states have call successors, (39) [2023-03-31 23:36:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:59,511 INFO L93 Difference]: Finished difference Result 125815 states and 198502 transitions. [2023-03-31 23:36:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 23:36:59,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 5 states have call successors, (46), 4 states have call predecessors, (46), 6 states have return successors, (39), 5 states have call predecessors, (39), 5 states have call successors, (39) Word has length 201 [2023-03-31 23:36:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:59,879 INFO L225 Difference]: With dead ends: 125815 [2023-03-31 23:36:59,879 INFO L226 Difference]: Without dead ends: 75752 [2023-03-31 23:37:00,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 23:37:00,039 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 2391 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 6815 mSolverCounterSat, 1127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2494 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 7942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 6815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:00,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2494 Valid, 1040 Invalid, 7942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1127 Valid, 6815 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-31 23:37:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75752 states. [2023-03-31 23:37:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75752 to 74492. [2023-03-31 23:37:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74492 states, 53320 states have (on average 1.4972993248312079) internal successors, (79836), 55455 states have internal predecessors, (79836), 14511 states have call successors, (14511), 5894 states have call predecessors, (14511), 6660 states have return successors, (22183), 13864 states have call predecessors, (22183), 14468 states have call successors, (22183) [2023-03-31 23:37:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74492 states to 74492 states and 116530 transitions. [2023-03-31 23:37:04,980 INFO L78 Accepts]: Start accepts. Automaton has 74492 states and 116530 transitions. Word has length 201 [2023-03-31 23:37:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:04,980 INFO L495 AbstractCegarLoop]: Abstraction has 74492 states and 116530 transitions. [2023-03-31 23:37:04,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 5 states have call successors, (46), 4 states have call predecessors, (46), 6 states have return successors, (39), 5 states have call predecessors, (39), 5 states have call successors, (39) [2023-03-31 23:37:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 74492 states and 116530 transitions. [2023-03-31 23:37:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-03-31 23:37:05,001 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:05,002 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:05,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:37:05,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:37:05,213 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:05,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1572624365, now seen corresponding path program 1 times [2023-03-31 23:37:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677325284] [2023-03-31 23:37:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-03-31 23:37:05,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:05,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677325284] [2023-03-31 23:37:05,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677325284] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:37:05,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805364290] [2023-03-31 23:37:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:05,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:37:05,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:37:05,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:37:05,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process