/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_spec14_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:39:12,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:39:12,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:39:12,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:39:12,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:39:12,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:39:12,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:39:12,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:39:12,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:39:12,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:39:12,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:39:12,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:39:12,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:39:12,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:39:12,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:39:12,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:39:12,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:39:12,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:39:12,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:39:12,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:39:12,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:39:12,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:39:12,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:39:12,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:39:12,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:39:12,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:39:12,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:39:12,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:39:12,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:39:13,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:39:13,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:39:13,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:39:13,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:39:13,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:39:13,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:39:13,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:39:13,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:39:13,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:39:13,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:39:13,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:39:13,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:39:13,012 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 23:39:13,031 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:39:13,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:39:13,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:39:13,032 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:39:13,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:39:13,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:39:13,033 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:39:13,033 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:39:13,033 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:39:13,033 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:39:13,033 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:39:13,033 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:39:13,033 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:39:13,034 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:39:13,034 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:39:13,034 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:39:13,034 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:39:13,034 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:39:13,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:39:13,035 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:39:13,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:39:13,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:39:13,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:39:13,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:39:13,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:39:13,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:39:13,035 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:39:13,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:39:13,036 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:39:13,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:39:13,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:39:13,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:39:13,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:39:13,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:39:13,036 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:39:13,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:39:13,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:39:13,037 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:39:13,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:39:13,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:39:13,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:39:13,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:39:13,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:39:13,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:39:13,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:39:13,292 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:39:13,293 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:39:13,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2023-04-02 23:39:14,510 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:39:14,809 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:39:14,809 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2023-04-02 23:39:14,828 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f7ec7525/c08de4fca1df49919743be8d8cdd89f3/FLAGaf89dee25 [2023-04-02 23:39:14,843 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f7ec7525/c08de4fca1df49919743be8d8cdd89f3 [2023-04-02 23:39:14,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:39:14,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:39:14,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:39:14,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:39:14,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:39:14,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:39:14" (1/1) ... [2023-04-02 23:39:14,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556d13d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:14, skipping insertion in model container [2023-04-02 23:39:14,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:39:14" (1/1) ... [2023-04-02 23:39:14,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:39:14,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:39:15,420 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_spec14_product31.cil.c[71150,71163] [2023-04-02 23:39:15,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:39:15,437 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:39:15,558 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_spec14_product31.cil.c[71150,71163] [2023-04-02 23:39:15,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:39:15,589 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:39:15,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15 WrapperNode [2023-04-02 23:39:15,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:39:15,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:39:15,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:39:15,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:39:15,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15" (1/1) ... [2023-04-02 23:39:15,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15" (1/1) ... [2023-04-02 23:39:15,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15" (1/1) ... [2023-04-02 23:39:15,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15" (1/1) ... [2023-04-02 23:39:15,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15" (1/1) ... [2023-04-02 23:39:15,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15" (1/1) ... [2023-04-02 23:39:15,715 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15" (1/1) ... [2023-04-02 23:39:15,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15" (1/1) ... [2023-04-02 23:39:15,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:39:15,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:39:15,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:39:15,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:39:15,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15" (1/1) ... [2023-04-02 23:39:15,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:39:15,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:15,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 23:39:15,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 23:39:15,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:39:15,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:39:15,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:39:15,816 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:39:15,817 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:39:15,817 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:39:15,817 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:39:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:39:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:39:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:39:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:39:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:39:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:39:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:39:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:39:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:39:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:39:15,819 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:39:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:39:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:39:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:39:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:39:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:39:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-02 23:39:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:39:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:39:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:39:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:39:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:39:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:39:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:39:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:39:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:39:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:39:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:39:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-02 23:39:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:39:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:39:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:39:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:39:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-02 23:39:15,824 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:39:15,824 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:39:15,824 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:39:15,824 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:39:15,824 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:39:15,825 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:39:15,825 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-02 23:39:15,825 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-02 23:39:15,825 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:39:15,826 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:39:15,826 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:39:15,826 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:39:15,826 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:39:15,826 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:39:15,826 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:39:15,826 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2023-04-02 23:39:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:39:15,828 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:39:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:39:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:39:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:39:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:39:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:39:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:39:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:39:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:39:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:39:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:39:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:39:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:39:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:39:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:39:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:39:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:39:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:39:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:39:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:39:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:39:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:39:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:39:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:39:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:39:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:39:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:39:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:39:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:39:15,834 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:39:15,834 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:39:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:39:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:39:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:39:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:39:15,838 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:39:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:39:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:39:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:39:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:39:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:39:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-02 23:39:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-02 23:39:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:39:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:39:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-02 23:39:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:39:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:39:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:39:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:39:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:39:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:39:16,121 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:39:16,124 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:39:17,404 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:39:18,246 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:39:18,246 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:39:18,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:39:18 BoogieIcfgContainer [2023-04-02 23:39:18,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:39:18,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:39:18,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:39:18,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:39:18,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:39:14" (1/3) ... [2023-04-02 23:39:18,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d03c6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:39:18, skipping insertion in model container [2023-04-02 23:39:18,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:15" (2/3) ... [2023-04-02 23:39:18,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d03c6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:39:18, skipping insertion in model container [2023-04-02 23:39:18,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:39:18" (3/3) ... [2023-04-02 23:39:18,261 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product31.cil.c [2023-04-02 23:39:18,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:39:18,278 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:39:18,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:39:18,355 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;@1522d5a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:39:18,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:39:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 572 states, 330 states have (on average 1.4545454545454546) internal successors, (480), 353 states have internal predecessors, (480), 176 states have call successors, (176), 54 states have call predecessors, (176), 54 states have return successors, (176), 171 states have call predecessors, (176), 176 states have call successors, (176) [2023-04-02 23:39:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 23:39:18,394 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:18,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:18,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:18,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:18,402 INFO L85 PathProgramCache]: Analyzing trace with hash -916783381, now seen corresponding path program 1 times [2023-04-02 23:39:18,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:18,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382059635] [2023-04-02 23:39:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:18,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:39:19,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:19,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382059635] [2023-04-02 23:39:19,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382059635] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:19,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:39:19,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:39:19,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473853687] [2023-04-02 23:39:19,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:19,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:39:19,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:19,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:39:19,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:39:19,550 INFO L87 Difference]: Start difference. First operand has 572 states, 330 states have (on average 1.4545454545454546) internal successors, (480), 353 states have internal predecessors, (480), 176 states have call successors, (176), 54 states have call predecessors, (176), 54 states have return successors, (176), 171 states have call predecessors, (176), 176 states have call successors, (176) Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-02 23:39:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:20,390 INFO L93 Difference]: Finished difference Result 1318 states and 1966 transitions. [2023-04-02 23:39:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:39:20,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 110 [2023-04-02 23:39:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:20,408 INFO L225 Difference]: With dead ends: 1318 [2023-04-02 23:39:20,408 INFO L226 Difference]: Without dead ends: 868 [2023-04-02 23:39:20,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:39:20,417 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 638 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:20,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 2545 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 23:39:20,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2023-04-02 23:39:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 861. [2023-04-02 23:39:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 540 states have (on average 1.487037037037037) internal successors, (803), 569 states have internal predecessors, (803), 234 states have call successors, (234), 91 states have call predecessors, (234), 86 states have return successors, (237), 224 states have call predecessors, (237), 228 states have call successors, (237) [2023-04-02 23:39:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1274 transitions. [2023-04-02 23:39:20,553 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1274 transitions. Word has length 110 [2023-04-02 23:39:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:20,554 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1274 transitions. [2023-04-02 23:39:20,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-02 23:39:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1274 transitions. [2023-04-02 23:39:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-02 23:39:20,560 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:20,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:20,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:39:20,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:20,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1738992624, now seen corresponding path program 1 times [2023-04-02 23:39:20,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:20,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181904984] [2023-04-02 23:39:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:20,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:39:21,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:21,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181904984] [2023-04-02 23:39:21,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181904984] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:21,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:39:21,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:39:21,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240570493] [2023-04-02 23:39:21,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:21,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:39:21,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:21,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:39:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:39:21,222 INFO L87 Difference]: Start difference. First operand 861 states and 1274 transitions. Second operand has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:39:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:22,034 INFO L93 Difference]: Finished difference Result 1003 states and 1449 transitions. [2023-04-02 23:39:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:39:22,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 114 [2023-04-02 23:39:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:22,042 INFO L225 Difference]: With dead ends: 1003 [2023-04-02 23:39:22,042 INFO L226 Difference]: Without dead ends: 1000 [2023-04-02 23:39:22,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:39:22,044 INFO L413 NwaCegarLoop]: 768 mSDtfsCounter, 782 mSDsluCounter, 2417 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 3185 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:22,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 3185 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 23:39:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2023-04-02 23:39:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 992. [2023-04-02 23:39:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 616 states have (on average 1.4496753246753247) internal successors, (893), 644 states have internal predecessors, (893), 267 states have call successors, (267), 113 states have call predecessors, (267), 108 states have return successors, (277), 258 states have call predecessors, (277), 260 states have call successors, (277) [2023-04-02 23:39:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1437 transitions. [2023-04-02 23:39:22,096 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1437 transitions. Word has length 114 [2023-04-02 23:39:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:22,097 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 1437 transitions. [2023-04-02 23:39:22,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:39:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1437 transitions. [2023-04-02 23:39:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-02 23:39:22,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:22,102 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:22,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:39:22,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:22,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash -310424659, now seen corresponding path program 1 times [2023-04-02 23:39:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:22,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011022869] [2023-04-02 23:39:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:22,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-02 23:39:22,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:22,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011022869] [2023-04-02 23:39:22,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011022869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:22,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:39:22,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:39:22,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252305475] [2023-04-02 23:39:22,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:22,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:39:22,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:22,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:39:22,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:39:22,391 INFO L87 Difference]: Start difference. First operand 992 states and 1437 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-02 23:39:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:22,561 INFO L93 Difference]: Finished difference Result 1963 states and 2861 transitions. [2023-04-02 23:39:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:39:22,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 150 [2023-04-02 23:39:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:22,569 INFO L225 Difference]: With dead ends: 1963 [2023-04-02 23:39:22,569 INFO L226 Difference]: Without dead ends: 1002 [2023-04-02 23:39:22,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:39:22,580 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 10 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2443 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:22,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2443 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:39:22,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2023-04-02 23:39:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2023-04-02 23:39:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 623 states have (on average 1.4446227929373996) internal successors, (900), 652 states have internal predecessors, (900), 267 states have call successors, (267), 113 states have call predecessors, (267), 111 states have return successors, (280), 260 states have call predecessors, (280), 260 states have call successors, (280) [2023-04-02 23:39:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1447 transitions. [2023-04-02 23:39:22,651 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1447 transitions. Word has length 150 [2023-04-02 23:39:22,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:22,652 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1447 transitions. [2023-04-02 23:39:22,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-02 23:39:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1447 transitions. [2023-04-02 23:39:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-04-02 23:39:22,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:22,658 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:22,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:39:22,658 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:22,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:22,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1411213770, now seen corresponding path program 1 times [2023-04-02 23:39:22,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:22,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226919699] [2023-04-02 23:39:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:22,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-02 23:39:22,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:22,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226919699] [2023-04-02 23:39:22,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226919699] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:22,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041409295] [2023-04-02 23:39:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:22,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:22,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:23,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:39:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:23,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:39:23,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-02 23:39:23,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:23,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041409295] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:23,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:23,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:39:23,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298626718] [2023-04-02 23:39:23,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:23,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:39:23,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:39:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:39:23,628 INFO L87 Difference]: Start difference. First operand 1002 states and 1447 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:39:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:23,916 INFO L93 Difference]: Finished difference Result 2051 states and 3027 transitions. [2023-04-02 23:39:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:39:23,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 159 [2023-04-02 23:39:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:23,925 INFO L225 Difference]: With dead ends: 2051 [2023-04-02 23:39:23,925 INFO L226 Difference]: Without dead ends: 1080 [2023-04-02 23:39:23,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:39:23,937 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 213 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:23,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1626 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:39:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2023-04-02 23:39:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2023-04-02 23:39:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 699 states have (on average 1.496423462088698) internal successors, (1046), 728 states have internal predecessors, (1046), 267 states have call successors, (267), 115 states have call predecessors, (267), 113 states have return successors, (280), 260 states have call predecessors, (280), 260 states have call successors, (280) [2023-04-02 23:39:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1593 transitions. [2023-04-02 23:39:23,983 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1593 transitions. Word has length 159 [2023-04-02 23:39:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:23,984 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1593 transitions. [2023-04-02 23:39:23,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:39:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1593 transitions. [2023-04-02 23:39:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-02 23:39:23,989 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:23,989 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:24,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:24,199 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 [2023-04-02 23:39:24,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:24,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:24,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1582718898, now seen corresponding path program 1 times [2023-04-02 23:39:24,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:24,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120407571] [2023-04-02 23:39:24,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:24,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-02 23:39:24,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:24,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120407571] [2023-04-02 23:39:24,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120407571] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:24,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412334505] [2023-04-02 23:39:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:24,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:24,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:24,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:24,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:39:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:24,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 2617 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:39:24,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 23:39:24,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:24,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412334505] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:24,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:24,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:39:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304063409] [2023-04-02 23:39:24,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:24,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:39:24,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:39:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:39:24,976 INFO L87 Difference]: Start difference. First operand 1080 states and 1593 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:39:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:25,231 INFO L93 Difference]: Finished difference Result 2207 states and 3317 transitions. [2023-04-02 23:39:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:39:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 164 [2023-04-02 23:39:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:25,238 INFO L225 Difference]: With dead ends: 2207 [2023-04-02 23:39:25,238 INFO L226 Difference]: Without dead ends: 1158 [2023-04-02 23:39:25,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:39:25,243 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 211 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:25,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1626 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:39:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2023-04-02 23:39:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1158. [2023-04-02 23:39:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 775 states have (on average 1.5380645161290323) internal successors, (1192), 804 states have internal predecessors, (1192), 267 states have call successors, (267), 117 states have call predecessors, (267), 115 states have return successors, (280), 260 states have call predecessors, (280), 260 states have call successors, (280) [2023-04-02 23:39:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1739 transitions. [2023-04-02 23:39:25,285 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1739 transitions. Word has length 164 [2023-04-02 23:39:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:25,285 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1739 transitions. [2023-04-02 23:39:25,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:39:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1739 transitions. [2023-04-02 23:39:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-02 23:39:25,290 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:25,290 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:25,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:25,506 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 [2023-04-02 23:39:25,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:25,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:25,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2141639394, now seen corresponding path program 1 times [2023-04-02 23:39:25,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:25,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101519169] [2023-04-02 23:39:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:25,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-02 23:39:25,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:25,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101519169] [2023-04-02 23:39:25,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101519169] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298783839] [2023-04-02 23:39:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:25,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:25,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:25,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:25,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:39:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:26,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:39:26,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 23:39:26,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:26,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298783839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:26,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:26,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:39:26,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173039816] [2023-04-02 23:39:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:26,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:39:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:39:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:39:26,312 INFO L87 Difference]: Start difference. First operand 1158 states and 1739 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:39:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:26,574 INFO L93 Difference]: Finished difference Result 2363 states and 3607 transitions. [2023-04-02 23:39:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:39:26,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 168 [2023-04-02 23:39:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:26,583 INFO L225 Difference]: With dead ends: 2363 [2023-04-02 23:39:26,584 INFO L226 Difference]: Without dead ends: 1236 [2023-04-02 23:39:26,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:39:26,589 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 209 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:26,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1626 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:39:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2023-04-02 23:39:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1236. [2023-04-02 23:39:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 851 states have (on average 1.572267920094007) internal successors, (1338), 880 states have internal predecessors, (1338), 267 states have call successors, (267), 119 states have call predecessors, (267), 117 states have return successors, (280), 260 states have call predecessors, (280), 260 states have call successors, (280) [2023-04-02 23:39:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1885 transitions. [2023-04-02 23:39:26,648 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1885 transitions. Word has length 168 [2023-04-02 23:39:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:26,649 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 1885 transitions. [2023-04-02 23:39:26,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:39:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1885 transitions. [2023-04-02 23:39:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-02 23:39:26,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:26,654 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:26,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:26,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:26,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:26,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash 455081686, now seen corresponding path program 1 times [2023-04-02 23:39:26,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:26,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664279517] [2023-04-02 23:39:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:26,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 23:39:27,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664279517] [2023-04-02 23:39:27,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664279517] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099900104] [2023-04-02 23:39:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:27,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:27,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:27,091 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:27,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:39:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:27,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 2624 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:39:27,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-02 23:39:27,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:27,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099900104] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:27,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:27,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:39:27,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044311589] [2023-04-02 23:39:27,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:27,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:39:27,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:39:27,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:39:27,655 INFO L87 Difference]: Start difference. First operand 1236 states and 1885 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:39:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:27,922 INFO L93 Difference]: Finished difference Result 2519 states and 3897 transitions. [2023-04-02 23:39:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:39:27,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 171 [2023-04-02 23:39:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:27,932 INFO L225 Difference]: With dead ends: 2519 [2023-04-02 23:39:27,932 INFO L226 Difference]: Without dead ends: 1314 [2023-04-02 23:39:27,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:39:27,938 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 207 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:27,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1626 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:39:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2023-04-02 23:39:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1314. [2023-04-02 23:39:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 927 states have (on average 1.6008629989212513) internal successors, (1484), 956 states have internal predecessors, (1484), 267 states have call successors, (267), 121 states have call predecessors, (267), 119 states have return successors, (280), 260 states have call predecessors, (280), 260 states have call successors, (280) [2023-04-02 23:39:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2031 transitions. [2023-04-02 23:39:27,989 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2031 transitions. Word has length 171 [2023-04-02 23:39:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:27,989 INFO L495 AbstractCegarLoop]: Abstraction has 1314 states and 2031 transitions. [2023-04-02 23:39:27,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:39:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2031 transitions. [2023-04-02 23:39:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-02 23:39:27,994 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:27,994 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:28,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:28,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:28,205 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:28,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash 368967812, now seen corresponding path program 1 times [2023-04-02 23:39:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:28,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257210321] [2023-04-02 23:39:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:28,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-02 23:39:28,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:28,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257210321] [2023-04-02 23:39:28,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257210321] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:28,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959744788] [2023-04-02 23:39:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:28,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:28,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:28,781 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:28,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:39:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:29,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 2620 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 23:39:29,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 23:39:29,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:29,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959744788] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:29,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:29,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:39:29,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822665333] [2023-04-02 23:39:29,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:29,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:39:29,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:39:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:39:29,602 INFO L87 Difference]: Start difference. First operand 1314 states and 2031 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:39:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:30,272 INFO L93 Difference]: Finished difference Result 3855 states and 6043 transitions. [2023-04-02 23:39:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:39:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) Word has length 173 [2023-04-02 23:39:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:30,287 INFO L225 Difference]: With dead ends: 3855 [2023-04-02 23:39:30,287 INFO L226 Difference]: Without dead ends: 2571 [2023-04-02 23:39:30,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:39:30,295 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 572 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:30,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 1591 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 23:39:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2023-04-02 23:39:30,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2484. [2023-04-02 23:39:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 1802 states have (on average 1.6165371809101) internal successors, (2913), 1847 states have internal predecessors, (2913), 465 states have call successors, (465), 215 states have call predecessors, (465), 216 states have return successors, (508), 445 states have call predecessors, (508), 455 states have call successors, (508) [2023-04-02 23:39:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 3886 transitions. [2023-04-02 23:39:30,424 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 3886 transitions. Word has length 173 [2023-04-02 23:39:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:30,424 INFO L495 AbstractCegarLoop]: Abstraction has 2484 states and 3886 transitions. [2023-04-02 23:39:30,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:39:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 3886 transitions. [2023-04-02 23:39:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-04-02 23:39:30,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:30,433 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:30,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:30,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:30,643 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:30,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:30,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1086180493, now seen corresponding path program 1 times [2023-04-02 23:39:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293544062] [2023-04-02 23:39:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-04-02 23:39:31,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:31,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293544062] [2023-04-02 23:39:31,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293544062] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:31,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721912319] [2023-04-02 23:39:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:31,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:31,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:31,136 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:31,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:39:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:31,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 180 conjunts are in the unsatisfiable core [2023-04-02 23:39:31,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-02 23:39:33,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:33,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721912319] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:33,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:33,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7] total 19 [2023-04-02 23:39:33,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116639343] [2023-04-02 23:39:33,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:33,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:39:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:33,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:39:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-02 23:39:33,268 INFO L87 Difference]: Start difference. First operand 2484 states and 3886 transitions. Second operand has 14 states, 9 states have (on average 9.777777777777779) internal successors, (88), 10 states have internal predecessors, (88), 6 states have call successors, (36), 5 states have call predecessors, (36), 7 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2023-04-02 23:39:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:38,209 INFO L93 Difference]: Finished difference Result 6064 states and 9608 transitions. [2023-04-02 23:39:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 23:39:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 9.777777777777779) internal successors, (88), 10 states have internal predecessors, (88), 6 states have call successors, (36), 5 states have call predecessors, (36), 7 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 175 [2023-04-02 23:39:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:38,231 INFO L225 Difference]: With dead ends: 6064 [2023-04-02 23:39:38,232 INFO L226 Difference]: Without dead ends: 3610 [2023-04-02 23:39:38,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:39:38,244 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 1642 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 5733 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 6559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 5733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:38,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1731 Valid, 1639 Invalid, 6559 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [826 Valid, 5733 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 23:39:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2023-04-02 23:39:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3341. [2023-04-02 23:39:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 2446 states have (on average 1.6067048242027802) internal successors, (3930), 2515 states have internal predecessors, (3930), 604 states have call successors, (604), 289 states have call predecessors, (604), 290 states have return successors, (668), 572 states have call predecessors, (668), 594 states have call successors, (668) [2023-04-02 23:39:38,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 5202 transitions. [2023-04-02 23:39:38,440 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 5202 transitions. Word has length 175 [2023-04-02 23:39:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:38,440 INFO L495 AbstractCegarLoop]: Abstraction has 3341 states and 5202 transitions. [2023-04-02 23:39:38,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 9.777777777777779) internal successors, (88), 10 states have internal predecessors, (88), 6 states have call successors, (36), 5 states have call predecessors, (36), 7 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2023-04-02 23:39:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 5202 transitions. [2023-04-02 23:39:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-02 23:39:38,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:38,448 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:38,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:38,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:38,659 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:38,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash 436394455, now seen corresponding path program 1 times [2023-04-02 23:39:38,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:38,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28201948] [2023-04-02 23:39:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:38,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-02 23:39:39,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:39,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28201948] [2023-04-02 23:39:39,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28201948] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:39,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:39:39,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-02 23:39:39,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947592496] [2023-04-02 23:39:39,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:39,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 23:39:39,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 23:39:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:39:39,840 INFO L87 Difference]: Start difference. First operand 3341 states and 5202 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (36), 3 states have call predecessors, (36), 6 states have return successors, (29), 7 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:39:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:41,766 INFO L93 Difference]: Finished difference Result 7732 states and 12107 transitions. [2023-04-02 23:39:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 23:39:41,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (36), 3 states have call predecessors, (36), 6 states have return successors, (29), 7 states have call predecessors, (29), 3 states have call successors, (29) Word has length 179 [2023-04-02 23:39:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:41,791 INFO L225 Difference]: With dead ends: 7732 [2023-04-02 23:39:41,791 INFO L226 Difference]: Without dead ends: 4427 [2023-04-02 23:39:41,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-04-02 23:39:41,804 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 1236 mSDsluCounter, 4673 mSDsCounter, 0 mSdLazyCounter, 2620 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 5373 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:41,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1250 Valid, 5373 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2620 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 23:39:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2023-04-02 23:39:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 4213. [2023-04-02 23:39:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 3096 states have (on average 1.6156330749354004) internal successors, (5002), 3190 states have internal predecessors, (5002), 747 states have call successors, (747), 360 states have call predecessors, (747), 369 states have return successors, (832), 710 states have call predecessors, (832), 736 states have call successors, (832) [2023-04-02 23:39:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 6581 transitions. [2023-04-02 23:39:42,080 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 6581 transitions. Word has length 179 [2023-04-02 23:39:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:42,080 INFO L495 AbstractCegarLoop]: Abstraction has 4213 states and 6581 transitions. [2023-04-02 23:39:42,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (36), 3 states have call predecessors, (36), 6 states have return successors, (29), 7 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:39:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 6581 transitions. [2023-04-02 23:39:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-02 23:39:42,091 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:42,091 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:42,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:39:42,092 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:42,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1248128295, now seen corresponding path program 1 times [2023-04-02 23:39:42,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:42,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909241934] [2023-04-02 23:39:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:42,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-02 23:39:42,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:42,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909241934] [2023-04-02 23:39:42,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909241934] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:42,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026782988] [2023-04-02 23:39:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:42,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:42,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:42,709 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:42,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 23:39:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:43,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 23:39:43,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 23:39:43,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:43,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026782988] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:43,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:43,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-04-02 23:39:43,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551839231] [2023-04-02 23:39:43,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:43,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:39:43,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:43,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:39:43,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-02 23:39:43,377 INFO L87 Difference]: Start difference. First operand 4213 states and 6581 transitions. Second operand has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-02 23:39:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:43,806 INFO L93 Difference]: Finished difference Result 5895 states and 9098 transitions. [2023-04-02 23:39:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:39:43,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 184 [2023-04-02 23:39:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:43,816 INFO L225 Difference]: With dead ends: 5895 [2023-04-02 23:39:43,817 INFO L226 Difference]: Without dead ends: 1718 [2023-04-02 23:39:43,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-02 23:39:43,831 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 146 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:43,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1409 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:39:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2023-04-02 23:39:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1705. [2023-04-02 23:39:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1205 states have (on average 1.525311203319502) internal successors, (1838), 1230 states have internal predecessors, (1838), 330 states have call successors, (330), 171 states have call predecessors, (330), 169 states have return successors, (362), 315 states have call predecessors, (362), 322 states have call successors, (362) [2023-04-02 23:39:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2530 transitions. [2023-04-02 23:39:43,924 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2530 transitions. Word has length 184 [2023-04-02 23:39:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:43,925 INFO L495 AbstractCegarLoop]: Abstraction has 1705 states and 2530 transitions. [2023-04-02 23:39:43,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-02 23:39:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2530 transitions. [2023-04-02 23:39:43,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-04-02 23:39:43,932 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:43,933 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:43,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:44,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:44,143 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:44,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1655830670, now seen corresponding path program 1 times [2023-04-02 23:39:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:44,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628595235] [2023-04-02 23:39:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2023-04-02 23:39:44,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:44,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628595235] [2023-04-02 23:39:44,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628595235] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:44,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757968938] [2023-04-02 23:39:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:44,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:44,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:44,478 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:44,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 23:39:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:45,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 3402 conjuncts, 69 conjunts are in the unsatisfiable core [2023-04-02 23:39:45,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 151 proven. 71 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-04-02 23:39:45,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:39:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-04-02 23:39:47,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757968938] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:39:47,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1023815029] [2023-04-02 23:39:47,437 INFO L159 IcfgInterpreter]: Started Sifa with 166 locations of interest [2023-04-02 23:39:47,437 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:39:47,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:39:47,445 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:39:47,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:39:49,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 172 for LOIs [2023-04-02 23:39:50,137 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 222 for LOIs [2023-04-02 23:39:52,764 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 222 for LOIs [2023-04-02 23:39:53,103 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 222 for LOIs [2023-04-02 23:39:56,379 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 248063 conjuctions. This might take some time...