/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_spec9_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:55:22,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:55:22,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:55:22,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:55:22,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:55:22,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:55:22,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:55:22,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:55:22,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:55:22,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:55:22,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:55:22,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:55:22,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:55:22,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:55:22,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:55:22,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:55:22,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:55:22,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:55:22,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:55:22,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:55:22,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:55:22,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:55:22,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:55:22,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:55:22,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:55:22,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:55:22,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:55:22,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:55:22,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:55:22,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:55:22,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:55:22,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:55:22,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:55:22,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:55:22,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:55:22,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:55:22,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:55:22,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:55:22,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:55:22,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:55:22,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:55:22,942 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 23:55:22,974 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:55:22,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:55:22,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:55:22,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:55:22,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:55:22,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:55:22,976 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:55:22,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:55:22,976 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:55:22,976 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:55:22,977 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:55:22,977 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:55:22,977 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:55:22,977 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:55:22,977 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:55:22,978 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:55:22,978 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:55:22,978 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:55:22,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:55:22,979 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:55:22,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:55:22,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:55:22,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:55:22,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:55:22,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:55:22,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:55:22,980 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:55:22,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:55:22,980 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:55:22,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:55:22,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:55:22,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:55:22,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:55:22,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:55:22,981 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:55:22,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:55:22,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:55:22,981 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:55:22,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:55:22,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:55:22,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:55:22,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:55:23,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:55:23,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:55:23,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:55:23,236 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:55:23,237 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:55:23,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2023-04-02 23:55:24,370 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:55:24,698 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:55:24,699 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2023-04-02 23:55:24,724 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80b06f1b0/43a0075d09c74bba80c4f44dee1bc7b7/FLAG521b11fbd [2023-04-02 23:55:24,740 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80b06f1b0/43a0075d09c74bba80c4f44dee1bc7b7 [2023-04-02 23:55:24,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:55:24,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:55:24,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:55:24,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:55:24,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:55:24,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:55:24" (1/1) ... [2023-04-02 23:55:24,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14314d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:24, skipping insertion in model container [2023-04-02 23:55:24,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:55:24" (1/1) ... [2023-04-02 23:55:24,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:55:24,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:55:25,287 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_spec9_product11.cil.c[71954,71967] [2023-04-02 23:55:25,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:55:25,315 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:55:25,407 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_spec9_product11.cil.c[71954,71967] [2023-04-02 23:55:25,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:55:25,431 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:55:25,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25 WrapperNode [2023-04-02 23:55:25,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:55:25,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:55:25,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:55:25,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:55:25,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25" (1/1) ... [2023-04-02 23:55:25,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25" (1/1) ... [2023-04-02 23:55:25,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25" (1/1) ... [2023-04-02 23:55:25,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25" (1/1) ... [2023-04-02 23:55:25,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25" (1/1) ... [2023-04-02 23:55:25,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25" (1/1) ... [2023-04-02 23:55:25,592 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25" (1/1) ... [2023-04-02 23:55:25,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25" (1/1) ... [2023-04-02 23:55:25,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:55:25,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:55:25,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:55:25,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:55:25,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25" (1/1) ... [2023-04-02 23:55:25,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:55:25,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:25,654 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 23:55:25,677 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 23:55:25,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:55:25,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:55:25,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:55:25,696 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:55:25,697 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:55:25,697 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:55:25,697 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:55:25,698 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:55:25,698 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:55:25,698 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:55:25,698 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:55:25,698 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:55:25,698 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:55:25,698 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:55:25,698 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:55:25,698 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:55:25,699 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:55:25,699 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:55:25,699 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:55:25,699 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:55:25,700 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:55:25,700 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:55:25,700 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:55:25,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:55:25,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:55:25,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:55:25,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:55:25,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:55:25,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:55:25,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__1 [2023-04-02 23:55:25,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__2 [2023-04-02 23:55:25,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__3 [2023-04-02 23:55:25,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__4 [2023-04-02 23:55:25,701 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:55:25,701 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:55:25,701 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:55:25,701 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:55:25,701 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:55:25,701 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:55:25,701 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:55:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:55:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:55:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:55:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:55:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:55:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:55:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:55:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:55:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:55:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:55:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:55:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:55:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:55:25,705 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:55:25,706 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:55:25,706 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:55:25,707 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:55:25,707 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:55:25,707 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:55:25,708 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:55:25,708 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:55:25,709 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:55:25,709 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:55:25,709 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:55:25,709 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:55:25,710 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:55:25,710 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:55:25,711 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-02 23:55:25,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-02 23:55:25,714 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:55:25,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:55:25,714 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:55:25,715 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:55:25,715 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:55:25,715 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:55:25,715 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:55:25,715 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:55:25,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:55:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:55:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:55:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:55:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:55:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:55:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:55:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:55:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:55:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:55:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:55:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:55:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:55:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:55:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:55:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:55:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:55:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:55:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:55:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:55:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:55:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:55:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:55:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:55:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:55:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:55:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:55:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:55:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:55:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:55:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:55:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:55:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__1 [2023-04-02 23:55:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__4 [2023-04-02 23:55:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:55:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:55:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:55:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:55:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:55:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:55:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:55:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:55:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:55:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:55:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:55:25,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:55:25,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:55:25,729 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:55:25,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:55:25,729 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__2 [2023-04-02 23:55:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__3 [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:55:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:55:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:55:25,733 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:55:25,733 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:55:25,733 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:55:25,733 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:55:25,733 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:55:25,733 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:55:25,733 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:55:25,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:55:25,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:55:25,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:55:25,992 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:55:25,995 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:55:27,300 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:55:28,102 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:55:28,102 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:55:28,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:55:28 BoogieIcfgContainer [2023-04-02 23:55:28,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:55:28,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:55:28,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:55:28,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:55:28,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:55:24" (1/3) ... [2023-04-02 23:55:28,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b9c2cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:55:28, skipping insertion in model container [2023-04-02 23:55:28,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:25" (2/3) ... [2023-04-02 23:55:28,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b9c2cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:55:28, skipping insertion in model container [2023-04-02 23:55:28,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:55:28" (3/3) ... [2023-04-02 23:55:28,116 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product11.cil.c [2023-04-02 23:55:28,133 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:55:28,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:55:28,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:55:28,217 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;@4e1107a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:55:28,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:55:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 555 states, 325 states have (on average 1.4892307692307691) internal successors, (484), 352 states have internal predecessors, (484), 168 states have call successors, (168), 49 states have call predecessors, (168), 49 states have return successors, (168), 159 states have call predecessors, (168), 168 states have call successors, (168) [2023-04-02 23:55:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:55:28,254 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:28,256 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:28,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:28,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1617882694, now seen corresponding path program 1 times [2023-04-02 23:55:28,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:28,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152252941] [2023-04-02 23:55:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:28,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:55:28,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:28,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152252941] [2023-04-02 23:55:28,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152252941] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:28,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:28,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:55:28,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879850792] [2023-04-02 23:55:28,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:28,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:55:28,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:28,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:55:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:55:28,876 INFO L87 Difference]: Start difference. First operand has 555 states, 325 states have (on average 1.4892307692307691) internal successors, (484), 352 states have internal predecessors, (484), 168 states have call successors, (168), 49 states have call predecessors, (168), 49 states have return successors, (168), 159 states have call predecessors, (168), 168 states have call successors, (168) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2023-04-02 23:55:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:29,004 INFO L93 Difference]: Finished difference Result 458 states and 681 transitions. [2023-04-02 23:55:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:55:29,007 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 112 [2023-04-02 23:55:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:29,021 INFO L225 Difference]: With dead ends: 458 [2023-04-02 23:55:29,021 INFO L226 Difference]: Without dead ends: 424 [2023-04-02 23:55:29,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:55:29,027 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:29,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 603 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-04-02 23:55:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2023-04-02 23:55:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 269 states have (on average 1.5315985130111525) internal successors, (412), 288 states have internal predecessors, (412), 113 states have call successors, (113), 45 states have call predecessors, (113), 41 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2023-04-02 23:55:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 630 transitions. [2023-04-02 23:55:29,095 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 630 transitions. Word has length 112 [2023-04-02 23:55:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:29,096 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 630 transitions. [2023-04-02 23:55:29,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2023-04-02 23:55:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 630 transitions. [2023-04-02 23:55:29,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-02 23:55:29,101 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:29,101 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:29,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:55:29,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:29,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash -85917210, now seen corresponding path program 1 times [2023-04-02 23:55:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:29,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950206442] [2023-04-02 23:55:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:29,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:55:29,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:29,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950206442] [2023-04-02 23:55:29,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950206442] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:29,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:29,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:55:29,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977949436] [2023-04-02 23:55:29,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:29,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:55:29,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:29,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:55:29,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:55:29,776 INFO L87 Difference]: Start difference. First operand 424 states and 630 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-02 23:55:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:32,066 INFO L93 Difference]: Finished difference Result 1199 states and 1827 transitions. [2023-04-02 23:55:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:55:32,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 113 [2023-04-02 23:55:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:32,082 INFO L225 Difference]: With dead ends: 1199 [2023-04-02 23:55:32,082 INFO L226 Difference]: Without dead ends: 817 [2023-04-02 23:55:32,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:55:32,094 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1189 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 3557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:32,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 505 Invalid, 3557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-02 23:55:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-04-02 23:55:32,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 792. [2023-04-02 23:55:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 515 states have (on average 1.5475728155339805) internal successors, (797), 548 states have internal predecessors, (797), 204 states have call successors, (204), 75 states have call predecessors, (204), 72 states have return successors, (202), 192 states have call predecessors, (202), 196 states have call successors, (202) [2023-04-02 23:55:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1203 transitions. [2023-04-02 23:55:32,179 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1203 transitions. Word has length 113 [2023-04-02 23:55:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:32,180 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1203 transitions. [2023-04-02 23:55:32,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-02 23:55:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1203 transitions. [2023-04-02 23:55:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-02 23:55:32,187 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:32,187 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:32,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:55:32,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:32,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:32,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1408702114, now seen corresponding path program 1 times [2023-04-02 23:55:32,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:32,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986391830] [2023-04-02 23:55:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:32,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:55:32,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:32,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986391830] [2023-04-02 23:55:32,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986391830] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:32,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:32,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:55:32,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188168338] [2023-04-02 23:55:32,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:32,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:55:32,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:32,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:55:32,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:55:32,563 INFO L87 Difference]: Start difference. First operand 792 states and 1203 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:55:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:33,077 INFO L93 Difference]: Finished difference Result 831 states and 1259 transitions. [2023-04-02 23:55:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:33,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 117 [2023-04-02 23:55:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:33,087 INFO L225 Difference]: With dead ends: 831 [2023-04-02 23:55:33,088 INFO L226 Difference]: Without dead ends: 814 [2023-04-02 23:55:33,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:33,094 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 638 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1930 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:33,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1930 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:55:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2023-04-02 23:55:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 796. [2023-04-02 23:55:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 519 states have (on average 1.5433526011560694) internal successors, (801), 552 states have internal predecessors, (801), 204 states have call successors, (204), 75 states have call predecessors, (204), 72 states have return successors, (202), 192 states have call predecessors, (202), 196 states have call successors, (202) [2023-04-02 23:55:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1207 transitions. [2023-04-02 23:55:33,179 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1207 transitions. Word has length 117 [2023-04-02 23:55:33,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:33,181 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1207 transitions. [2023-04-02 23:55:33,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:55:33,181 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1207 transitions. [2023-04-02 23:55:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 23:55:33,186 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:33,186 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:33,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:55:33,187 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:33,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:33,187 INFO L85 PathProgramCache]: Analyzing trace with hash -712240206, now seen corresponding path program 1 times [2023-04-02 23:55:33,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:33,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088852784] [2023-04-02 23:55:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:33,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:55:33,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:33,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088852784] [2023-04-02 23:55:33,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088852784] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:33,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:33,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:55:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50983084] [2023-04-02 23:55:33,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:33,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:55:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:33,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:55:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:33,589 INFO L87 Difference]: Start difference. First operand 796 states and 1207 transitions. Second operand has 8 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-02 23:55:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:33,785 INFO L93 Difference]: Finished difference Result 817 states and 1233 transitions. [2023-04-02 23:55:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:55:33,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) Word has length 122 [2023-04-02 23:55:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:33,790 INFO L225 Difference]: With dead ends: 817 [2023-04-02 23:55:33,791 INFO L226 Difference]: Without dead ends: 800 [2023-04-02 23:55:33,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:55:33,795 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 10 mSDsluCounter, 3539 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4132 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:33,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4132 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2023-04-02 23:55:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 796. [2023-04-02 23:55:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 519 states have (on average 1.5394990366088632) internal successors, (799), 552 states have internal predecessors, (799), 204 states have call successors, (204), 75 states have call predecessors, (204), 72 states have return successors, (202), 192 states have call predecessors, (202), 196 states have call successors, (202) [2023-04-02 23:55:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1205 transitions. [2023-04-02 23:55:33,840 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1205 transitions. Word has length 122 [2023-04-02 23:55:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:33,841 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1205 transitions. [2023-04-02 23:55:33,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-02 23:55:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1205 transitions. [2023-04-02 23:55:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 23:55:33,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:33,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:33,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:55:33,844 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:33,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash 806284390, now seen corresponding path program 1 times [2023-04-02 23:55:33,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:33,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865936451] [2023-04-02 23:55:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:33,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:55:34,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:34,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865936451] [2023-04-02 23:55:34,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865936451] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:34,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:34,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:34,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994589161] [2023-04-02 23:55:34,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:34,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:34,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:34,028 INFO L87 Difference]: Start difference. First operand 796 states and 1205 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:34,214 INFO L93 Difference]: Finished difference Result 2270 states and 3505 transitions. [2023-04-02 23:55:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:34,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 137 [2023-04-02 23:55:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:34,224 INFO L225 Difference]: With dead ends: 2270 [2023-04-02 23:55:34,225 INFO L226 Difference]: Without dead ends: 1516 [2023-04-02 23:55:34,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:34,232 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 583 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:34,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 1206 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2023-04-02 23:55:34,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1484. [2023-04-02 23:55:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 993 states have (on average 1.5579053373615308) internal successors, (1547), 1055 states have internal predecessors, (1547), 362 states have call successors, (362), 129 states have call predecessors, (362), 128 states have return successors, (378), 335 states have call predecessors, (378), 353 states have call successors, (378) [2023-04-02 23:55:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2287 transitions. [2023-04-02 23:55:34,344 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2287 transitions. Word has length 137 [2023-04-02 23:55:34,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:34,345 INFO L495 AbstractCegarLoop]: Abstraction has 1484 states and 2287 transitions. [2023-04-02 23:55:34,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2287 transitions. [2023-04-02 23:55:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 23:55:34,349 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:34,349 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:34,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:55:34,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:34,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:34,350 INFO L85 PathProgramCache]: Analyzing trace with hash -776279982, now seen corresponding path program 1 times [2023-04-02 23:55:34,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:34,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679089583] [2023-04-02 23:55:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:34,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:55:34,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:34,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679089583] [2023-04-02 23:55:34,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679089583] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:34,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:34,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:34,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756621634] [2023-04-02 23:55:34,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:34,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:34,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:34,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:34,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:34,493 INFO L87 Difference]: Start difference. First operand 1484 states and 2287 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:34,712 INFO L93 Difference]: Finished difference Result 4333 states and 6786 transitions. [2023-04-02 23:55:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:34,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 138 [2023-04-02 23:55:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:34,742 INFO L225 Difference]: With dead ends: 4333 [2023-04-02 23:55:34,742 INFO L226 Difference]: Without dead ends: 2894 [2023-04-02 23:55:34,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:34,751 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 582 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:34,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 1212 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2023-04-02 23:55:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2861. [2023-04-02 23:55:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 1942 states have (on average 1.566941297631308) internal successors, (3043), 2062 states have internal predecessors, (3043), 678 states have call successors, (678), 237 states have call predecessors, (678), 240 states have return successors, (752), 621 states have call predecessors, (752), 667 states have call successors, (752) [2023-04-02 23:55:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4473 transitions. [2023-04-02 23:55:34,990 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4473 transitions. Word has length 138 [2023-04-02 23:55:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:34,992 INFO L495 AbstractCegarLoop]: Abstraction has 2861 states and 4473 transitions. [2023-04-02 23:55:34,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4473 transitions. [2023-04-02 23:55:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-02 23:55:34,995 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:34,995 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:34,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:55:34,996 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:34,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:34,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1703835944, now seen corresponding path program 1 times [2023-04-02 23:55:34,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:34,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711406884] [2023-04-02 23:55:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:34,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:55:35,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:35,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711406884] [2023-04-02 23:55:35,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711406884] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:35,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:35,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:35,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867843357] [2023-04-02 23:55:35,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:35,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:35,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:35,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:35,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:35,131 INFO L87 Difference]: Start difference. First operand 2861 states and 4473 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:35,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:35,461 INFO L93 Difference]: Finished difference Result 8460 states and 13459 transitions. [2023-04-02 23:55:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:35,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 139 [2023-04-02 23:55:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:35,504 INFO L225 Difference]: With dead ends: 8460 [2023-04-02 23:55:35,504 INFO L226 Difference]: Without dead ends: 5650 [2023-04-02 23:55:35,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:35,555 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 581 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:35,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 1218 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5650 states. [2023-04-02 23:55:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5650 to 5616. [2023-04-02 23:55:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5616 states, 3841 states have (on average 1.5706847175214789) internal successors, (6033), 4077 states have internal predecessors, (6033), 1310 states have call successors, (1310), 453 states have call predecessors, (1310), 464 states have return successors, (1578), 1193 states have call predecessors, (1578), 1295 states have call successors, (1578) [2023-04-02 23:55:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5616 states to 5616 states and 8921 transitions. [2023-04-02 23:55:35,878 INFO L78 Accepts]: Start accepts. Automaton has 5616 states and 8921 transitions. Word has length 139 [2023-04-02 23:55:35,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:35,878 INFO L495 AbstractCegarLoop]: Abstraction has 5616 states and 8921 transitions. [2023-04-02 23:55:35,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 5616 states and 8921 transitions. [2023-04-02 23:55:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-02 23:55:35,881 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:35,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:35,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:55:35,882 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:35,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1278022228, now seen corresponding path program 1 times [2023-04-02 23:55:35,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:35,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171049212] [2023-04-02 23:55:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:35,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:55:36,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:36,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171049212] [2023-04-02 23:55:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171049212] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:36,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939423268] [2023-04-02 23:55:36,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:36,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:36,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:36,026 INFO L87 Difference]: Start difference. First operand 5616 states and 8921 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:36,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:36,652 INFO L93 Difference]: Finished difference Result 16715 states and 27198 transitions. [2023-04-02 23:55:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:36,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 140 [2023-04-02 23:55:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:36,732 INFO L225 Difference]: With dead ends: 16715 [2023-04-02 23:55:36,732 INFO L226 Difference]: Without dead ends: 11162 [2023-04-02 23:55:36,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:36,760 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 580 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:36,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1224 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:36,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11162 states. [2023-04-02 23:55:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11162 to 11127. [2023-04-02 23:55:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11127 states, 7640 states have (on average 1.5715968586387434) internal successors, (12007), 8108 states have internal predecessors, (12007), 2574 states have call successors, (2574), 885 states have call predecessors, (2574), 912 states have return successors, (3512), 2337 states have call predecessors, (3512), 2551 states have call successors, (3512) [2023-04-02 23:55:37,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11127 states to 11127 states and 18093 transitions. [2023-04-02 23:55:37,560 INFO L78 Accepts]: Start accepts. Automaton has 11127 states and 18093 transitions. Word has length 140 [2023-04-02 23:55:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:37,560 INFO L495 AbstractCegarLoop]: Abstraction has 11127 states and 18093 transitions. [2023-04-02 23:55:37,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 11127 states and 18093 transitions. [2023-04-02 23:55:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-02 23:55:37,564 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:37,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:37,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:55:37,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:37,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:37,566 INFO L85 PathProgramCache]: Analyzing trace with hash 962702826, now seen corresponding path program 1 times [2023-04-02 23:55:37,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:37,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577019146] [2023-04-02 23:55:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:37,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:55:37,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:37,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577019146] [2023-04-02 23:55:37,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577019146] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:37,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:37,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:37,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017998894] [2023-04-02 23:55:37,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:37,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:37,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:37,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:37,695 INFO L87 Difference]: Start difference. First operand 11127 states and 18093 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:38,243 INFO L93 Difference]: Finished difference Result 11852 states and 19354 transitions. [2023-04-02 23:55:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:38,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 141 [2023-04-02 23:55:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:38,327 INFO L225 Difference]: With dead ends: 11852 [2023-04-02 23:55:38,328 INFO L226 Difference]: Without dead ends: 11839 [2023-04-02 23:55:38,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:38,342 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 566 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:38,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1222 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11839 states. [2023-04-02 23:55:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11839 to 11805. [2023-04-02 23:55:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11805 states, 8107 states have (on average 1.5712347354138398) internal successors, (12738), 8604 states have internal predecessors, (12738), 2731 states have call successors, (2731), 938 states have call predecessors, (2731), 966 states have return successors, (3821), 2478 states have call predecessors, (3821), 2708 states have call successors, (3821) [2023-04-02 23:55:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11805 states to 11805 states and 19290 transitions. [2023-04-02 23:55:39,081 INFO L78 Accepts]: Start accepts. Automaton has 11805 states and 19290 transitions. Word has length 141 [2023-04-02 23:55:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:39,082 INFO L495 AbstractCegarLoop]: Abstraction has 11805 states and 19290 transitions. [2023-04-02 23:55:39,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 11805 states and 19290 transitions. [2023-04-02 23:55:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-02 23:55:39,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:39,090 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:39,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:55:39,090 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:39,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash 889062073, now seen corresponding path program 1 times [2023-04-02 23:55:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:39,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913492363] [2023-04-02 23:55:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-02 23:55:39,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913492363] [2023-04-02 23:55:39,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913492363] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:39,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:39,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:55:39,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011062552] [2023-04-02 23:55:39,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:39,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:55:39,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:39,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:55:39,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:55:39,441 INFO L87 Difference]: Start difference. First operand 11805 states and 19290 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) [2023-04-02 23:55:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:40,189 INFO L93 Difference]: Finished difference Result 23754 states and 39514 transitions. [2023-04-02 23:55:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) Word has length 199 [2023-04-02 23:55:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:40,276 INFO L225 Difference]: With dead ends: 23754 [2023-04-02 23:55:40,276 INFO L226 Difference]: Without dead ends: 11992 [2023-04-02 23:55:40,336 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 23:55:40,336 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 10 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:40,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2351 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11992 states. [2023-04-02 23:55:40,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11992 to 11989. [2023-04-02 23:55:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11989 states, 8225 states have (on average 1.5630395136778115) internal successors, (12856), 8722 states have internal predecessors, (12856), 2747 states have call successors, (2747), 938 states have call predecessors, (2747), 1016 states have return successors, (4033), 2544 states have call predecessors, (4033), 2724 states have call successors, (4033) [2023-04-02 23:55:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11989 states to 11989 states and 19636 transitions. [2023-04-02 23:55:41,054 INFO L78 Accepts]: Start accepts. Automaton has 11989 states and 19636 transitions. Word has length 199 [2023-04-02 23:55:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:41,054 INFO L495 AbstractCegarLoop]: Abstraction has 11989 states and 19636 transitions. [2023-04-02 23:55:41,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) [2023-04-02 23:55:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 11989 states and 19636 transitions. [2023-04-02 23:55:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-04-02 23:55:41,061 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:41,062 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:41,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:55:41,062 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:41,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1767131807, now seen corresponding path program 1 times [2023-04-02 23:55:41,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:41,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313886413] [2023-04-02 23:55:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:41,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:41,472 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 23:55:41,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:41,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313886413] [2023-04-02 23:55:41,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313886413] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:55:41,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081459669] [2023-04-02 23:55:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:41,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:41,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:41,477 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 23:55:41,482 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 23:55:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:42,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 3100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:55:42,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:55:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-02 23:55:42,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:55:42,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081459669] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:42,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:55:42,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:55:42,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075216671] [2023-04-02 23:55:42,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:42,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:55:42,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:55:42,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:55:42,172 INFO L87 Difference]: Start difference. First operand 11989 states and 19636 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:55:42,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:42,930 INFO L93 Difference]: Finished difference Result 25261 states and 42524 transitions. [2023-04-02 23:55:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 204 [2023-04-02 23:55:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:43,010 INFO L225 Difference]: With dead ends: 25261 [2023-04-02 23:55:43,011 INFO L226 Difference]: Without dead ends: 13315 [2023-04-02 23:55:43,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 206 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 23:55:43,064 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 213 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:43,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1557 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:55:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13315 states. [2023-04-02 23:55:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13315 to 13315. [2023-04-02 23:55:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13315 states, 9517 states have (on average 1.6116423242618472) internal successors, (15338), 10014 states have internal predecessors, (15338), 2747 states have call successors, (2747), 972 states have call predecessors, (2747), 1050 states have return successors, (4033), 2544 states have call predecessors, (4033), 2724 states have call successors, (4033) [2023-04-02 23:55:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13315 states to 13315 states and 22118 transitions. [2023-04-02 23:55:43,820 INFO L78 Accepts]: Start accepts. Automaton has 13315 states and 22118 transitions. Word has length 204 [2023-04-02 23:55:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:43,821 INFO L495 AbstractCegarLoop]: Abstraction has 13315 states and 22118 transitions. [2023-04-02 23:55:43,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:55:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 13315 states and 22118 transitions. [2023-04-02 23:55:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-04-02 23:55:43,831 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:43,831 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:43,844 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 23:55:44,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 23:55:44,041 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:44,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:44,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1068661225, now seen corresponding path program 1 times [2023-04-02 23:55:44,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:44,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999320813] [2023-04-02 23:55:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:44,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:44,320 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 23:55:44,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:44,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999320813] [2023-04-02 23:55:44,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999320813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:55:44,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448937470] [2023-04-02 23:55:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:44,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:44,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:44,322 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 23:55:44,324 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 23:55:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:44,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 3105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:55:44,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:55:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 23:55:44,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:55:44,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448937470] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:44,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:55:44,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:55:44,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646553270] [2023-04-02 23:55:44,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:44,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:55:44,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:55:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:55:44,936 INFO L87 Difference]: Start difference. First operand 13315 states and 22118 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:55:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:45,839 INFO L93 Difference]: Finished difference Result 27913 states and 47454 transitions. [2023-04-02 23:55:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 209 [2023-04-02 23:55:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:45,920 INFO L225 Difference]: With dead ends: 27913 [2023-04-02 23:55:45,920 INFO L226 Difference]: Without dead ends: 14641 [2023-04-02 23:55:45,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 209 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 23:55:45,969 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 211 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:45,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1557 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:55:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14641 states. [2023-04-02 23:55:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14641 to 14641. [2023-04-02 23:55:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14641 states, 10809 states have (on average 1.6486261448792672) internal successors, (17820), 11306 states have internal predecessors, (17820), 2747 states have call successors, (2747), 1006 states have call predecessors, (2747), 1084 states have return successors, (4033), 2544 states have call predecessors, (4033), 2724 states have call successors, (4033) [2023-04-02 23:55:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14641 states to 14641 states and 24600 transitions. [2023-04-02 23:55:46,792 INFO L78 Accepts]: Start accepts. Automaton has 14641 states and 24600 transitions. Word has length 209 [2023-04-02 23:55:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:46,792 INFO L495 AbstractCegarLoop]: Abstraction has 14641 states and 24600 transitions. [2023-04-02 23:55:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:55:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 14641 states and 24600 transitions. [2023-04-02 23:55:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-04-02 23:55:46,800 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:46,800 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:46,817 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 23:55:47,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 23:55:47,010 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:47,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:47,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2046503015, now seen corresponding path program 1 times [2023-04-02 23:55:47,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:47,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060858698] [2023-04-02 23:55:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:47,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:47,287 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 23:55:47,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:47,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060858698] [2023-04-02 23:55:47,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060858698] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:55:47,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585021237] [2023-04-02 23:55:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:47,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:47,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:47,289 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 23:55:47,291 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 23:55:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:47,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 3109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:55:47,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:55:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 23:55:47,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:55:47,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585021237] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:47,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:55:47,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:55:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994088944] [2023-04-02 23:55:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:47,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:55:47,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:55:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:55:47,931 INFO L87 Difference]: Start difference. First operand 14641 states and 24600 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:55:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:48,582 INFO L93 Difference]: Finished difference Result 30565 states and 52384 transitions. [2023-04-02 23:55:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:48,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 213 [2023-04-02 23:55:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:48,669 INFO L225 Difference]: With dead ends: 30565 [2023-04-02 23:55:48,669 INFO L226 Difference]: Without dead ends: 15967 [2023-04-02 23:55:48,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 213 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 23:55:48,715 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 209 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:48,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1557 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:55:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15967 states. [2023-04-02 23:55:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15967 to 15967. [2023-04-02 23:55:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15967 states, 12101 states have (on average 1.677712585736716) internal successors, (20302), 12598 states have internal predecessors, (20302), 2747 states have call successors, (2747), 1040 states have call predecessors, (2747), 1118 states have return successors, (4033), 2544 states have call predecessors, (4033), 2724 states have call successors, (4033) [2023-04-02 23:55:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15967 states to 15967 states and 27082 transitions. [2023-04-02 23:55:49,378 INFO L78 Accepts]: Start accepts. Automaton has 15967 states and 27082 transitions. Word has length 213 [2023-04-02 23:55:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:49,379 INFO L495 AbstractCegarLoop]: Abstraction has 15967 states and 27082 transitions. [2023-04-02 23:55:49,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:55:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 15967 states and 27082 transitions. [2023-04-02 23:55:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-04-02 23:55:49,386 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:49,386 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:49,399 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 23:55:49,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:49,597 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:49,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1704631179, now seen corresponding path program 1 times [2023-04-02 23:55:49,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:49,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908410224] [2023-04-02 23:55:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:49,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:49,830 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 23:55:49,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:49,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908410224] [2023-04-02 23:55:49,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908410224] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:55:49,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587847411] [2023-04-02 23:55:49,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:49,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:49,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:49,832 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 23:55:49,834 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 23:55:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:50,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 3112 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:55:50,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:55:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 23:55:50,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:55:50,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587847411] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:50,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:55:50,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:55:50,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842616893] [2023-04-02 23:55:50,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:50,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:55:50,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:50,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:55:50,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:55:50,625 INFO L87 Difference]: Start difference. First operand 15967 states and 27082 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:55:51,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:51,216 INFO L93 Difference]: Finished difference Result 33217 states and 57314 transitions. [2023-04-02 23:55:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:51,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 216 [2023-04-02 23:55:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:51,300 INFO L225 Difference]: With dead ends: 33217 [2023-04-02 23:55:51,301 INFO L226 Difference]: Without dead ends: 17293 [2023-04-02 23:55:51,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 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 23:55:51,349 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 207 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:51,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1557 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:55:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17293 states. [2023-04-02 23:55:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17293 to 17293. [2023-04-02 23:55:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17293 states, 13393 states have (on average 1.7011871873366684) internal successors, (22784), 13890 states have internal predecessors, (22784), 2747 states have call successors, (2747), 1074 states have call predecessors, (2747), 1152 states have return successors, (4033), 2544 states have call predecessors, (4033), 2724 states have call successors, (4033) [2023-04-02 23:55:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17293 states to 17293 states and 29564 transitions. [2023-04-02 23:55:52,046 INFO L78 Accepts]: Start accepts. Automaton has 17293 states and 29564 transitions. Word has length 216 [2023-04-02 23:55:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:52,046 INFO L495 AbstractCegarLoop]: Abstraction has 17293 states and 29564 transitions. [2023-04-02 23:55:52,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:55:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 17293 states and 29564 transitions. [2023-04-02 23:55:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-04-02 23:55:52,055 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:52,055 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:52,067 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 23:55:52,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:52,266 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:52,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -780832869, now seen corresponding path program 1 times [2023-04-02 23:55:52,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:52,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662532577] [2023-04-02 23:55:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 23:55:52,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:52,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662532577] [2023-04-02 23:55:52,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662532577] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:52,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:52,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:55:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110853088] [2023-04-02 23:55:52,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:52,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:55:52,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:55:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:55:52,481 INFO L87 Difference]: Start difference. First operand 17293 states and 29564 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:55:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:53,229 INFO L93 Difference]: Finished difference Result 35971 states and 62210 transitions. [2023-04-02 23:55:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:53,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 218 [2023-04-02 23:55:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:53,317 INFO L225 Difference]: With dead ends: 35971 [2023-04-02 23:55:53,318 INFO L226 Difference]: Without dead ends: 18449 [2023-04-02 23:55:53,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:55:53,380 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 99 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:53,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1570 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:55:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18449 states. [2023-04-02 23:55:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18449 to 18449. [2023-04-02 23:55:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18449 states, 14515 states have (on average 1.6118498105408199) internal successors, (23396), 15012 states have internal predecessors, (23396), 2747 states have call successors, (2747), 1108 states have call predecessors, (2747), 1186 states have return successors, (4033), 2544 states have call predecessors, (4033), 2724 states have call successors, (4033) [2023-04-02 23:55:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18449 states to 18449 states and 30176 transitions. [2023-04-02 23:55:54,036 INFO L78 Accepts]: Start accepts. Automaton has 18449 states and 30176 transitions. Word has length 218 [2023-04-02 23:55:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:54,037 INFO L495 AbstractCegarLoop]: Abstraction has 18449 states and 30176 transitions. [2023-04-02 23:55:54,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:55:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 18449 states and 30176 transitions. [2023-04-02 23:55:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-04-02 23:55:54,045 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:54,045 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:54,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 23:55:54,045 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:54,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:54,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1720406134, now seen corresponding path program 1 times [2023-04-02 23:55:54,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:54,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63357577] [2023-04-02 23:55:54,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:54,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 23:55:54,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:54,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63357577] [2023-04-02 23:55:54,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63357577] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:54,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:54,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:55:54,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785351626] [2023-04-02 23:55:54,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:54,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:55:54,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:55:54,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:55:54,780 INFO L87 Difference]: Start difference. First operand 18449 states and 30176 transitions. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 7 states have call successors, (45), 4 states have call predecessors, (45), 5 states have return successors, (41), 7 states have call predecessors, (41), 6 states have call successors, (41) [2023-04-02 23:55:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:58,390 INFO L93 Difference]: Finished difference Result 41824 states and 69273 transitions. [2023-04-02 23:55:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 23:55:58,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 7 states have call successors, (45), 4 states have call predecessors, (45), 5 states have return successors, (41), 7 states have call predecessors, (41), 6 states have call successors, (41) Word has length 218 [2023-04-02 23:55:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:58,462 INFO L225 Difference]: With dead ends: 41824 [2023-04-02 23:55:58,462 INFO L226 Difference]: Without dead ends: 19591 [2023-04-02 23:55:58,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-04-02 23:55:58,517 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1629 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 4735 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1679 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 5493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 4735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:58,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1679 Valid, 700 Invalid, 5493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 4735 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 23:55:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19591 states. [2023-04-02 23:55:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19591 to 19266. [2023-04-02 23:55:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19266 states, 13977 states have (on average 1.5014666952851112) internal successors, (20986), 14661 states have internal predecessors, (20986), 3592 states have call successors, (3592), 1601 states have call predecessors, (3592), 1696 states have return successors, (5298), 3225 states have call predecessors, (5298), 3569 states have call successors, (5298) [2023-04-02 23:55:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19266 states to 19266 states and 29876 transitions. [2023-04-02 23:55:59,500 INFO L78 Accepts]: Start accepts. Automaton has 19266 states and 29876 transitions. Word has length 218 [2023-04-02 23:55:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:59,501 INFO L495 AbstractCegarLoop]: Abstraction has 19266 states and 29876 transitions. [2023-04-02 23:55:59,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 7 states have call successors, (45), 4 states have call predecessors, (45), 5 states have return successors, (41), 7 states have call predecessors, (41), 6 states have call successors, (41) [2023-04-02 23:55:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 19266 states and 29876 transitions. [2023-04-02 23:55:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-04-02 23:55:59,517 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:59,517 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:59,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 23:55:59,518 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:59,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2124632343, now seen corresponding path program 1 times [2023-04-02 23:55:59,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:59,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095018034] [2023-04-02 23:55:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:59,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-02 23:56:02,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:02,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095018034] [2023-04-02 23:56:02,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095018034] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:02,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556240834] [2023-04-02 23:56:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:02,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:02,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:02,605 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 23:56:02,606 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 23:56:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:03,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 3115 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 23:56:03,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-04-02 23:56:03,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:03,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556240834] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:03,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:03,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [33] total 37 [2023-04-02 23:56:03,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664011369] [2023-04-02 23:56:03,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:03,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:56:03,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:56:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 23:56:03,322 INFO L87 Difference]: Start difference. First operand 19266 states and 29876 transitions. Second operand has 6 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (45), 3 states have call predecessors, (45), 4 states have return successors, (41), 4 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-02 23:56:04,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:04,485 INFO L93 Difference]: Finished difference Result 40441 states and 62749 transitions. [2023-04-02 23:56:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:56:04,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (45), 3 states have call predecessors, (45), 4 states have return successors, (41), 4 states have call predecessors, (41), 3 states have call successors, (41) Word has length 219 [2023-04-02 23:56:04,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:04,554 INFO L225 Difference]: With dead ends: 40441 [2023-04-02 23:56:04,554 INFO L226 Difference]: Without dead ends: 21263 [2023-04-02 23:56:04,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 23:56:04,596 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 359 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:04,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1938 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 23:56:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21263 states. [2023-04-02 23:56:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21263 to 21077. [2023-04-02 23:56:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21077 states, 15137 states have (on average 1.482988703177644) internal successors, (22448), 15841 states have internal predecessors, (22448), 3950 states have call successors, (3950), 1890 states have call predecessors, (3950), 1989 states have return successors, (6161), 3567 states have call predecessors, (6161), 3927 states have call successors, (6161) [2023-04-02 23:56:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21077 states to 21077 states and 32559 transitions. [2023-04-02 23:56:05,413 INFO L78 Accepts]: Start accepts. Automaton has 21077 states and 32559 transitions. Word has length 219 [2023-04-02 23:56:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:05,414 INFO L495 AbstractCegarLoop]: Abstraction has 21077 states and 32559 transitions. [2023-04-02 23:56:05,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (45), 3 states have call predecessors, (45), 4 states have return successors, (41), 4 states have call predecessors, (41), 3 states have call successors, (41) [2023-04-02 23:56:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 21077 states and 32559 transitions. [2023-04-02 23:56:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-04-02 23:56:05,425 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:05,426 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:05,443 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 23:56:05,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 23:56:05,638 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:05,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:05,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1489556079, now seen corresponding path program 1 times [2023-04-02 23:56:05,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:05,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315622125] [2023-04-02 23:56:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:05,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2023-04-02 23:56:06,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:06,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315622125] [2023-04-02 23:56:06,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315622125] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:06,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801297130] [2023-04-02 23:56:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:06,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:06,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:06,898 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 23:56:06,901 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 23:56:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:07,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 3937 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:56:07,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-04-02 23:56:07,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:07,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801297130] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:07,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:07,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2023-04-02 23:56:07,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744528851] [2023-04-02 23:56:07,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:07,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:56:07,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:07,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:56:07,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2023-04-02 23:56:07,511 INFO L87 Difference]: Start difference. First operand 21077 states and 32559 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) [2023-04-02 23:56:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:08,162 INFO L93 Difference]: Finished difference Result 42360 states and 65981 transitions. [2023-04-02 23:56:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:56:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) Word has length 350 [2023-04-02 23:56:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:08,236 INFO L225 Difference]: With dead ends: 42360 [2023-04-02 23:56:08,236 INFO L226 Difference]: Without dead ends: 21346 [2023-04-02 23:56:08,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2023-04-02 23:56:08,284 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 8 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:08,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1177 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21346 states. [2023-04-02 23:56:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21346 to 21337. [2023-04-02 23:56:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21337 states, 15348 states have (on average 1.4786942924159499) internal successors, (22695), 16110 states have internal predecessors, (22695), 3950 states have call successors, (3950), 1890 states have call predecessors, (3950), 2038 states have return successors, (5622), 3558 states have call predecessors, (5622), 3927 states have call successors, (5622) [2023-04-02 23:56:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 32267 transitions. [2023-04-02 23:56:09,184 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 32267 transitions. Word has length 350 [2023-04-02 23:56:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:09,185 INFO L495 AbstractCegarLoop]: Abstraction has 21337 states and 32267 transitions. [2023-04-02 23:56:09,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) [2023-04-02 23:56:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 32267 transitions. [2023-04-02 23:56:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2023-04-02 23:56:09,192 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:09,193 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:09,205 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 23:56:09,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 23:56:09,405 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:09,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:09,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1918506454, now seen corresponding path program 1 times [2023-04-02 23:56:09,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:09,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687590180] [2023-04-02 23:56:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:09,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2023-04-02 23:56:10,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:10,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687590180] [2023-04-02 23:56:10,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687590180] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:10,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506878495] [2023-04-02 23:56:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:10,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:10,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:10,433 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 23:56:10,448 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 23:56:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:11,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 3930 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:56:11,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2023-04-02 23:56:11,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:11,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506878495] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:11,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:11,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2023-04-02 23:56:11,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623986328] [2023-04-02 23:56:11,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:11,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:56:11,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:11,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:56:11,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2023-04-02 23:56:11,281 INFO L87 Difference]: Start difference. First operand 21337 states and 32267 transitions. Second operand has 9 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 5 states have call successors, (47), 4 states have call predecessors, (47), 6 states have return successors, (45), 7 states have call predecessors, (45), 4 states have call successors, (45) [2023-04-02 23:56:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:15,527 INFO L93 Difference]: Finished difference Result 52728 states and 81385 transitions. [2023-04-02 23:56:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 23:56:15,528 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 5 states have call successors, (47), 4 states have call predecessors, (47), 6 states have return successors, (45), 7 states have call predecessors, (45), 4 states have call successors, (45) Word has length 347 [2023-04-02 23:56:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:15,617 INFO L225 Difference]: With dead ends: 52728 [2023-04-02 23:56:15,618 INFO L226 Difference]: Without dead ends: 31440 [2023-04-02 23:56:15,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:56:15,654 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1302 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 6239 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 6724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 6239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:15,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 785 Invalid, 6724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 6239 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 23:56:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31440 states. [2023-04-02 23:56:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31440 to 30018. [2023-04-02 23:56:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30018 states, 22044 states have (on average 1.4845309381237526) internal successors, (32725), 22981 states have internal predecessors, (32725), 5142 states have call successors, (5142), 2568 states have call predecessors, (5142), 2831 states have return successors, (7663), 4720 states have call predecessors, (7663), 5119 states have call successors, (7663) [2023-04-02 23:56:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30018 states to 30018 states and 45530 transitions. [2023-04-02 23:56:16,959 INFO L78 Accepts]: Start accepts. Automaton has 30018 states and 45530 transitions. Word has length 347 [2023-04-02 23:56:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:16,960 INFO L495 AbstractCegarLoop]: Abstraction has 30018 states and 45530 transitions. [2023-04-02 23:56:16,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 5 states have call successors, (47), 4 states have call predecessors, (47), 6 states have return successors, (45), 7 states have call predecessors, (45), 4 states have call successors, (45) [2023-04-02 23:56:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 30018 states and 45530 transitions. [2023-04-02 23:56:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-04-02 23:56:16,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:16,969 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:16,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 23:56:17,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:17,182 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:17,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:17,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1362593377, now seen corresponding path program 1 times [2023-04-02 23:56:17,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:17,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844723955] [2023-04-02 23:56:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:17,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2023-04-02 23:56:18,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:18,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844723955] [2023-04-02 23:56:18,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844723955] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:18,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967202054] [2023-04-02 23:56:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:18,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:18,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:18,113 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 23:56:18,131 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 23:56:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:18,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 3928 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:56:18,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2023-04-02 23:56:19,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:56:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2023-04-02 23:56:20,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967202054] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:56:20,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697103869] [2023-04-02 23:56:20,152 INFO L159 IcfgInterpreter]: Started Sifa with 186 locations of interest [2023-04-02 23:56:20,152 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:56:20,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:56:20,161 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:56:20,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:56:22,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 181 for LOIs [2023-04-02 23:56:23,016 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 235 for LOIs [2023-04-02 23:56:25,735 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 235 for LOIs [2023-04-02 23:56:29,721 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 123071 conjuctions. This might take some time...