/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:37:24,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:37:24,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:37:24,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:37:24,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:37:24,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:37:24,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:37:24,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:37:24,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:37:24,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:37:24,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:37:24,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:37:24,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:37:24,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:37:24,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:37:24,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:37:24,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:37:24,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:37:24,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:37:24,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:37:24,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:37:24,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:37:24,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:37:24,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:37:24,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:37:24,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:37:24,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:37:24,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:37:24,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:37:24,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:37:24,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:37:24,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:37:24,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:37:24,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:37:24,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:37:24,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:37:24,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:37:24,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:37:24,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:37:24,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:37:24,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:37:24,783 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:37:24,811 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:37:24,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:37:24,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:37:24,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:37:24,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:37:24,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:37:24,814 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:37:24,814 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:37:24,814 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:37:24,814 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:37:24,815 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:37:24,815 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:37:24,815 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:37:24,815 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:37:24,815 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:37:24,815 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:37:24,815 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:37:24,815 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:37:24,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:37:24,816 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:37:24,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:37:24,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:37:24,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:37:24,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:37:24,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:37:24,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:37:24,817 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:37:24,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:37:24,817 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:37:24,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:37:24,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:37:24,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:37:24,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:37:24,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:37:24,818 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:37:24,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:37:24,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:37:24,818 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:37:24,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:37:24,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:37:24,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:37:24,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:37:25,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:37:25,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:37:25,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:37:25,071 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:37:25,072 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:37:25,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2023-04-01 05:37:26,385 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:37:26,717 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:37:26,718 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2023-04-01 05:37:26,737 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddace3eeb/4e1524b06684492da204007c584f809f/FLAGa771c76d7 [2023-04-01 05:37:26,753 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddace3eeb/4e1524b06684492da204007c584f809f [2023-04-01 05:37:26,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:37:26,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:37:26,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:37:26,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:37:26,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:37:26,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:37:26" (1/1) ... [2023-04-01 05:37:26,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25315c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:26, skipping insertion in model container [2023-04-01 05:37:26,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:37:26" (1/1) ... [2023-04-01 05:37:26,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:37:26,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:37:27,328 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_product26.cil.c[67702,67715] [2023-04-01 05:37:27,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:37:27,366 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:37:27,468 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_product26.cil.c[67702,67715] [2023-04-01 05:37:27,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:37:27,511 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:37:27,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27 WrapperNode [2023-04-01 05:37:27,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:37:27,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:37:27,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:37:27,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:37:27,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27" (1/1) ... [2023-04-01 05:37:27,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27" (1/1) ... [2023-04-01 05:37:27,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27" (1/1) ... [2023-04-01 05:37:27,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27" (1/1) ... [2023-04-01 05:37:27,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27" (1/1) ... [2023-04-01 05:37:27,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27" (1/1) ... [2023-04-01 05:37:27,672 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27" (1/1) ... [2023-04-01 05:37:27,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27" (1/1) ... [2023-04-01 05:37:27,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:37:27,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:37:27,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:37:27,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:37:27,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27" (1/1) ... [2023-04-01 05:37:27,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:37:27,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:27,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:37:27,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:37:27,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:37:27,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:37:27,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:37:27,785 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:37:27,787 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:37:27,787 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 05:37:27,787 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 05:37:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 05:37:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 05:37:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 05:37:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 05:37:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 05:37:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 05:37:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 05:37:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 05:37:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:37:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 05:37:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 05:37:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 05:37:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:37:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 05:37:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:37:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:37:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:37:27,789 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 05:37:27,791 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 05:37:27,791 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 05:37:27,791 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 05:37:27,791 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 05:37:27,791 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 05:37:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-01 05:37:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 05:37:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 05:37:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 05:37:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 05:37:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 05:37:27,793 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 05:37:27,793 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 05:37:27,793 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 05:37:27,793 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 05:37:27,793 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 05:37:27,793 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 05:37:27,794 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 05:37:27,794 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 05:37:27,794 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 05:37:27,795 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 05:37:27,795 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 05:37:27,795 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2023-04-01 05:37:27,795 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:37:27,795 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__empty [2023-04-01 05:37:27,795 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 05:37:27,796 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 05:37:27,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:37:27,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:37:27,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:37:27,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:37:27,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:37:27,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:37:27,797 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 05:37:27,798 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 05:37:27,798 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 05:37:27,798 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 05:37:27,798 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 05:37:27,798 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 05:37:27,798 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 05:37:27,799 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 05:37:27,799 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 05:37:27,799 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 05:37:27,799 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 05:37:27,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:37:27,799 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:37:27,799 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:37:27,799 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:37:27,799 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:37:27,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2023-04-01 05:37:27,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2023-04-01 05:37:27,800 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:37:27,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:37:27,800 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:37:27,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:37:27,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:37:27,801 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 05:37:27,801 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 05:37:27,802 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 05:37:27,802 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:37:27,802 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:37:27,802 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 05:37:27,802 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 05:37:27,803 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 05:37:27,804 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 05:37:27,804 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 05:37:27,804 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 05:37:27,804 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 05:37:27,804 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 05:37:27,804 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 05:37:27,804 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:37:27,805 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 05:37:27,805 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:37:27,805 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:37:27,805 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:37:27,805 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:37:27,805 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:37:27,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:37:27,805 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:37:27,806 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 05:37:27,806 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 05:37:27,806 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 05:37:27,806 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 05:37:27,806 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 05:37:27,807 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 05:37:27,807 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 05:37:27,808 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 05:37:27,810 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 05:37:27,810 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 05:37:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 05:37:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 05:37:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 05:37:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 05:37:27,817 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 05:37:27,817 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 05:37:27,817 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-01 05:37:27,817 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 05:37:27,817 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__empty [2023-04-01 05:37:27,818 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:37:27,819 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:37:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:37:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:37:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:37:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:37:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 05:37:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:37:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:37:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:37:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:37:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:37:28,103 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:37:28,109 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:37:29,471 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:37:30,316 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:37:30,316 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 05:37:30,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:37:30 BoogieIcfgContainer [2023-04-01 05:37:30,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:37:30,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:37:30,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:37:30,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:37:30,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:37:26" (1/3) ... [2023-04-01 05:37:30,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612f41c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:37:30, skipping insertion in model container [2023-04-01 05:37:30,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:37:27" (2/3) ... [2023-04-01 05:37:30,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612f41c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:37:30, skipping insertion in model container [2023-04-01 05:37:30,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:37:30" (3/3) ... [2023-04-01 05:37:30,330 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2023-04-01 05:37:30,348 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:37:30,348 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:37:30,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:37:30,430 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;@29a7b8b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:37:30,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:37:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 343 states have (on average 1.4839650145772594) internal successors, (509), 368 states have internal predecessors, (509), 181 states have call successors, (181), 52 states have call predecessors, (181), 52 states have return successors, (181), 174 states have call predecessors, (181), 181 states have call successors, (181) [2023-04-01 05:37:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 05:37:30,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:30,456 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:37:30,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:30,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:30,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1941317089, now seen corresponding path program 1 times [2023-04-01 05:37:30,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:30,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669605164] [2023-04-01 05:37:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:30,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:37:31,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:31,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669605164] [2023-04-01 05:37:31,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669605164] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:31,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:37:31,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:37:31,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917366920] [2023-04-01 05:37:31,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:31,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:37:31,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:31,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:37:31,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:37:31,733 INFO L87 Difference]: Start difference. First operand has 590 states, 343 states have (on average 1.4839650145772594) internal successors, (509), 368 states have internal predecessors, (509), 181 states have call successors, (181), 52 states have call predecessors, (181), 52 states have return successors, (181), 174 states have call predecessors, (181), 181 states have call successors, (181) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-01 05:37:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:32,234 INFO L93 Difference]: Finished difference Result 1318 states and 2026 transitions. [2023-04-01 05:37:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:37:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 81 [2023-04-01 05:37:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:32,280 INFO L225 Difference]: With dead ends: 1318 [2023-04-01 05:37:32,280 INFO L226 Difference]: Without dead ends: 866 [2023-04-01 05:37:32,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:37:32,295 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 646 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:32,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1320 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:37:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-04-01 05:37:32,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 820. [2023-04-01 05:37:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 537 states have (on average 1.5493482309124766) internal successors, (832), 564 states have internal predecessors, (832), 211 states have call successors, (211), 76 states have call predecessors, (211), 71 states have return successors, (213), 192 states have call predecessors, (213), 204 states have call successors, (213) [2023-04-01 05:37:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1256 transitions. [2023-04-01 05:37:32,437 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1256 transitions. Word has length 81 [2023-04-01 05:37:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:32,438 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1256 transitions. [2023-04-01 05:37:32,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-01 05:37:32,438 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1256 transitions. [2023-04-01 05:37:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-01 05:37:32,451 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:32,452 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:37:32,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:37:32,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:32,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:32,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1985332843, now seen corresponding path program 1 times [2023-04-01 05:37:32,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:32,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856056269] [2023-04-01 05:37:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:32,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:37:33,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:33,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856056269] [2023-04-01 05:37:33,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856056269] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:33,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:37:33,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:37:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567197968] [2023-04-01 05:37:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:33,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:37:33,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:37:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:37:33,162 INFO L87 Difference]: Start difference. First operand 820 states and 1256 transitions. Second operand has 7 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 05:37:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:34,922 INFO L93 Difference]: Finished difference Result 2446 states and 3840 transitions. [2023-04-01 05:37:34,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 05:37:34,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 109 [2023-04-01 05:37:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:34,936 INFO L225 Difference]: With dead ends: 2446 [2023-04-01 05:37:34,937 INFO L226 Difference]: Without dead ends: 1657 [2023-04-01 05:37:34,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-04-01 05:37:34,947 INFO L413 NwaCegarLoop]: 1274 mSDtfsCounter, 1255 mSDsluCounter, 3939 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 5213 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:34,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 5213 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 05:37:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2023-04-01 05:37:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1609. [2023-04-01 05:37:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1059 states have (on average 1.542020774315392) internal successors, (1633), 1120 states have internal predecessors, (1633), 410 states have call successors, (410), 143 states have call predecessors, (410), 139 states have return successors, (455), 372 states have call predecessors, (455), 401 states have call successors, (455) [2023-04-01 05:37:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2498 transitions. [2023-04-01 05:37:35,036 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2498 transitions. Word has length 109 [2023-04-01 05:37:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:35,037 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 2498 transitions. [2023-04-01 05:37:35,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 05:37:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2498 transitions. [2023-04-01 05:37:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 05:37:35,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:35,040 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:37:35,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:37:35,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:35,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:35,041 INFO L85 PathProgramCache]: Analyzing trace with hash -837297627, now seen corresponding path program 1 times [2023-04-01 05:37:35,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:35,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417262311] [2023-04-01 05:37:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:35,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:37:35,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:35,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417262311] [2023-04-01 05:37:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417262311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:35,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:37:35,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:37:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042033120] [2023-04-01 05:37:35,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:35,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:37:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:37:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:37:35,522 INFO L87 Difference]: Start difference. First operand 1609 states and 2498 transitions. Second operand has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 05:37:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:37,494 INFO L93 Difference]: Finished difference Result 5863 states and 9213 transitions. [2023-04-01 05:37:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 05:37:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 108 [2023-04-01 05:37:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:37,534 INFO L225 Difference]: With dead ends: 5863 [2023-04-01 05:37:37,535 INFO L226 Difference]: Without dead ends: 4285 [2023-04-01 05:37:37,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-04-01 05:37:37,554 INFO L413 NwaCegarLoop]: 1074 mSDtfsCounter, 1317 mSDsluCounter, 2623 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 3697 SdHoareTripleChecker+Invalid, 2804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:37,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1336 Valid, 3697 Invalid, 2804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 05:37:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2023-04-01 05:37:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 4269. [2023-04-01 05:37:37,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4269 states, 2794 states have (on average 1.4960629921259843) internal successors, (4180), 2973 states have internal predecessors, (4180), 1076 states have call successors, (1076), 405 states have call predecessors, (1076), 398 states have return successors, (1301), 970 states have call predecessors, (1301), 1059 states have call successors, (1301) [2023-04-01 05:37:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4269 states to 4269 states and 6557 transitions. [2023-04-01 05:37:37,810 INFO L78 Accepts]: Start accepts. Automaton has 4269 states and 6557 transitions. Word has length 108 [2023-04-01 05:37:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:37,810 INFO L495 AbstractCegarLoop]: Abstraction has 4269 states and 6557 transitions. [2023-04-01 05:37:37,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 05:37:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4269 states and 6557 transitions. [2023-04-01 05:37:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 05:37:37,813 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:37,813 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:37:37,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:37:37,813 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:37,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:37,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1168053698, now seen corresponding path program 1 times [2023-04-01 05:37:37,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:37,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344965250] [2023-04-01 05:37:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:37,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:37:38,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:38,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344965250] [2023-04-01 05:37:38,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344965250] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:37:38,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005184038] [2023-04-01 05:37:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:38,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:38,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:38,369 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:37:38,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:37:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:38,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 05:37:38,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:37:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:37:39,063 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:37:39,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005184038] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:39,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:37:39,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-04-01 05:37:39,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509702014] [2023-04-01 05:37:39,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:39,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:37:39,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:39,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:37:39,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:37:39,065 INFO L87 Difference]: Start difference. First operand 4269 states and 6557 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 05:37:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:39,552 INFO L93 Difference]: Finished difference Result 12077 states and 19230 transitions. [2023-04-01 05:37:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:37:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 112 [2023-04-01 05:37:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:39,618 INFO L225 Difference]: With dead ends: 12077 [2023-04-01 05:37:39,619 INFO L226 Difference]: Without dead ends: 7839 [2023-04-01 05:37:39,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:37:39,654 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 603 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:39,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1166 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:37:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7839 states. [2023-04-01 05:37:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7839 to 7529. [2023-04-01 05:37:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7529 states, 4950 states have (on average 1.510909090909091) internal successors, (7479), 5297 states have internal predecessors, (7479), 1878 states have call successors, (1878), 690 states have call predecessors, (1878), 700 states have return successors, (2357), 1697 states have call predecessors, (2357), 1861 states have call successors, (2357) [2023-04-01 05:37:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 11714 transitions. [2023-04-01 05:37:40,176 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 11714 transitions. Word has length 112 [2023-04-01 05:37:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:40,177 INFO L495 AbstractCegarLoop]: Abstraction has 7529 states and 11714 transitions. [2023-04-01 05:37:40,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 05:37:40,177 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 11714 transitions. [2023-04-01 05:37:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 05:37:40,180 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:40,180 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:37:40,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:37:40,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:40,391 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:40,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:40,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1865241934, now seen corresponding path program 1 times [2023-04-01 05:37:40,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:40,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325437004] [2023-04-01 05:37:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:40,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:37:40,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:40,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325437004] [2023-04-01 05:37:40,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325437004] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:37:40,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91665741] [2023-04-01 05:37:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:40,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:40,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:37:40,907 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:37:40,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:37:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:41,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 05:37:41,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:37:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:37:41,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:37:41,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91665741] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:41,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:37:41,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-04-01 05:37:41,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587013586] [2023-04-01 05:37:41,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:41,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:37:41,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:41,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:37:41,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:37:41,560 INFO L87 Difference]: Start difference. First operand 7529 states and 11714 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 05:37:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:42,231 INFO L93 Difference]: Finished difference Result 16635 states and 26341 transitions. [2023-04-01 05:37:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:37:42,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 113 [2023-04-01 05:37:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:42,314 INFO L225 Difference]: With dead ends: 16635 [2023-04-01 05:37:42,314 INFO L226 Difference]: Without dead ends: 9137 [2023-04-01 05:37:42,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:37:42,366 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 599 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:42,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 1210 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:37:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9137 states. [2023-04-01 05:37:42,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9137 to 8923. [2023-04-01 05:37:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8923 states, 5887 states have (on average 1.5102768812638017) internal successors, (8891), 6291 states have internal predecessors, (8891), 2198 states have call successors, (2198), 813 states have call predecessors, (2198), 837 states have return successors, (2776), 2000 states have call predecessors, (2776), 2181 states have call successors, (2776) [2023-04-01 05:37:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8923 states to 8923 states and 13865 transitions. [2023-04-01 05:37:42,955 INFO L78 Accepts]: Start accepts. Automaton has 8923 states and 13865 transitions. Word has length 113 [2023-04-01 05:37:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:42,957 INFO L495 AbstractCegarLoop]: Abstraction has 8923 states and 13865 transitions. [2023-04-01 05:37:42,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 05:37:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 8923 states and 13865 transitions. [2023-04-01 05:37:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 05:37:42,965 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:42,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:37:42,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 05:37:43,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:37:43,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:43,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:43,177 INFO L85 PathProgramCache]: Analyzing trace with hash 395547051, now seen corresponding path program 1 times [2023-04-01 05:37:43,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:43,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215658748] [2023-04-01 05:37:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:43,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 05:37:44,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:44,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215658748] [2023-04-01 05:37:44,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215658748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:44,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:37:44,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 05:37:44,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939707062] [2023-04-01 05:37:44,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:44,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:37:44,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:44,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:37:44,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:37:44,005 INFO L87 Difference]: Start difference. First operand 8923 states and 13865 transitions. Second operand has 10 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-01 05:37:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:46,554 INFO L93 Difference]: Finished difference Result 29194 states and 46937 transitions. [2023-04-01 05:37:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 05:37:46,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 119 [2023-04-01 05:37:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:46,711 INFO L225 Difference]: With dead ends: 29194 [2023-04-01 05:37:46,712 INFO L226 Difference]: Without dead ends: 20302 [2023-04-01 05:37:46,770 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 [2023-04-01 05:37:46,771 INFO L413 NwaCegarLoop]: 1282 mSDtfsCounter, 1245 mSDsluCounter, 7845 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 9127 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:46,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 9127 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 05:37:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20302 states. [2023-04-01 05:37:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20302 to 19816. [2023-04-01 05:37:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19816 states, 13234 states have (on average 1.5142058334592716) internal successors, (20039), 14133 states have internal predecessors, (20039), 4750 states have call successors, (4750), 1759 states have call predecessors, (4750), 1831 states have return successors, (6723), 4266 states have call predecessors, (6723), 4719 states have call successors, (6723) [2023-04-01 05:37:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19816 states to 19816 states and 31512 transitions. [2023-04-01 05:37:48,113 INFO L78 Accepts]: Start accepts. Automaton has 19816 states and 31512 transitions. Word has length 119 [2023-04-01 05:37:48,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:48,114 INFO L495 AbstractCegarLoop]: Abstraction has 19816 states and 31512 transitions. [2023-04-01 05:37:48,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-01 05:37:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 19816 states and 31512 transitions. [2023-04-01 05:37:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 05:37:48,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:48,119 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:37:48,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 05:37:48,119 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:48,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash 81833054, now seen corresponding path program 1 times [2023-04-01 05:37:48,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:48,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115591083] [2023-04-01 05:37:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:48,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:37:48,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:48,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115591083] [2023-04-01 05:37:48,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115591083] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:48,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:37:48,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:37:48,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777911114] [2023-04-01 05:37:48,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:48,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:37:48,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:48,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:37:48,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:37:48,465 INFO L87 Difference]: Start difference. First operand 19816 states and 31512 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:37:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:49,685 INFO L93 Difference]: Finished difference Result 38874 states and 63128 transitions. [2023-04-01 05:37:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:37:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 125 [2023-04-01 05:37:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:49,854 INFO L225 Difference]: With dead ends: 38874 [2023-04-01 05:37:49,854 INFO L226 Difference]: Without dead ends: 21894 [2023-04-01 05:37:50,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:37:50,129 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 33 mSDsluCounter, 3808 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:50,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:37:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21894 states. [2023-04-01 05:37:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21894 to 20979. [2023-04-01 05:37:51,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20979 states, 13968 states have (on average 1.5133877434135166) internal successors, (21139), 15020 states have internal predecessors, (21139), 5106 states have call successors, (5106), 1759 states have call predecessors, (5106), 1904 states have return successors, (7251), 4617 states have call predecessors, (7251), 5075 states have call successors, (7251) [2023-04-01 05:37:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20979 states to 20979 states and 33496 transitions. [2023-04-01 05:37:51,515 INFO L78 Accepts]: Start accepts. Automaton has 20979 states and 33496 transitions. Word has length 125 [2023-04-01 05:37:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:51,517 INFO L495 AbstractCegarLoop]: Abstraction has 20979 states and 33496 transitions. [2023-04-01 05:37:51,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:37:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 20979 states and 33496 transitions. [2023-04-01 05:37:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 05:37:51,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:51,521 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-04-01 05:37:51,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 05:37:51,521 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:51,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1759655938, now seen corresponding path program 1 times [2023-04-01 05:37:51,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:51,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859930602] [2023-04-01 05:37:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:51,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:37:52,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:52,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859930602] [2023-04-01 05:37:52,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859930602] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:52,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:37:52,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 05:37:52,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619839879] [2023-04-01 05:37:52,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:52,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:37:52,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:52,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:37:52,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:37:52,336 INFO L87 Difference]: Start difference. First operand 20979 states and 33496 transitions. Second operand has 10 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (26), 6 states have call predecessors, (26), 4 states have call successors, (26) [2023-04-01 05:37:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:37:54,263 INFO L93 Difference]: Finished difference Result 46104 states and 74657 transitions. [2023-04-01 05:37:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 05:37:54,263 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (26), 6 states have call predecessors, (26), 4 states have call successors, (26) Word has length 128 [2023-04-01 05:37:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:37:54,456 INFO L225 Difference]: With dead ends: 46104 [2023-04-01 05:37:54,457 INFO L226 Difference]: Without dead ends: 25156 [2023-04-01 05:37:54,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-04-01 05:37:54,768 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 767 mSDsluCounter, 4304 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 5063 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:37:54,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 5063 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 05:37:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25156 states. [2023-04-01 05:37:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25156 to 24041. [2023-04-01 05:37:56,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24041 states, 15856 states have (on average 1.4626639757820383) internal successors, (23192), 16835 states have internal predecessors, (23192), 5589 states have call successors, (5589), 2321 states have call predecessors, (5589), 2595 states have return successors, (9595), 5237 states have call predecessors, (9595), 5547 states have call successors, (9595) [2023-04-01 05:37:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24041 states to 24041 states and 38376 transitions. [2023-04-01 05:37:56,441 INFO L78 Accepts]: Start accepts. Automaton has 24041 states and 38376 transitions. Word has length 128 [2023-04-01 05:37:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:37:56,441 INFO L495 AbstractCegarLoop]: Abstraction has 24041 states and 38376 transitions. [2023-04-01 05:37:56,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (26), 6 states have call predecessors, (26), 4 states have call successors, (26) [2023-04-01 05:37:56,442 INFO L276 IsEmpty]: Start isEmpty. Operand 24041 states and 38376 transitions. [2023-04-01 05:37:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-01 05:37:56,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:37:56,445 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:37:56,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 05:37:56,445 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:37:56,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:37:56,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1785078629, now seen corresponding path program 1 times [2023-04-01 05:37:56,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:37:56,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521780466] [2023-04-01 05:37:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:37:56,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:37:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:37:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:37:57,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:37:57,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521780466] [2023-04-01 05:37:57,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521780466] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:37:57,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:37:57,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 05:37:57,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979130275] [2023-04-01 05:37:57,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:37:57,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:37:57,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:37:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:37:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-04-01 05:37:57,186 INFO L87 Difference]: Start difference. First operand 24041 states and 38376 transitions. Second operand has 11 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2023-04-01 05:38:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:01,918 INFO L93 Difference]: Finished difference Result 51488 states and 86863 transitions. [2023-04-01 05:38:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 05:38:01,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) Word has length 129 [2023-04-01 05:38:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:02,133 INFO L225 Difference]: With dead ends: 51488 [2023-04-01 05:38:02,133 INFO L226 Difference]: Without dead ends: 30631 [2023-04-01 05:38:02,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:38:02,243 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 1506 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 6652 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 7140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 6652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:02,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1602 Valid, 1389 Invalid, 7140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 6652 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 05:38:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30631 states. [2023-04-01 05:38:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30631 to 28709. [2023-04-01 05:38:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28709 states, 19434 states have (on average 1.4974271894617681) internal successors, (29101), 20577 states have internal predecessors, (29101), 6349 states have call successors, (6349), 2567 states have call predecessors, (6349), 2925 states have return successors, (10763), 5889 states have call predecessors, (10763), 6307 states have call successors, (10763) [2023-04-01 05:38:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28709 states to 28709 states and 46213 transitions. [2023-04-01 05:38:04,340 INFO L78 Accepts]: Start accepts. Automaton has 28709 states and 46213 transitions. Word has length 129 [2023-04-01 05:38:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:04,342 INFO L495 AbstractCegarLoop]: Abstraction has 28709 states and 46213 transitions. [2023-04-01 05:38:04,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2023-04-01 05:38:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 28709 states and 46213 transitions. [2023-04-01 05:38:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 05:38:04,353 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:04,353 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:04,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 05:38:04,354 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:04,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:04,354 INFO L85 PathProgramCache]: Analyzing trace with hash 941985075, now seen corresponding path program 1 times [2023-04-01 05:38:04,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:04,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420688343] [2023-04-01 05:38:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:04,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 05:38:05,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:05,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420688343] [2023-04-01 05:38:05,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420688343] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:05,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:05,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 05:38:05,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36240947] [2023-04-01 05:38:05,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:05,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 05:38:05,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:05,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 05:38:05,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-04-01 05:38:05,281 INFO L87 Difference]: Start difference. First operand 28709 states and 46213 transitions. Second operand has 16 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 7 states have call successors, (33), 5 states have call predecessors, (33), 7 states have return successors, (26), 8 states have call predecessors, (26), 6 states have call successors, (26)