/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_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:56:19,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:56:19,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:56:19,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:56:19,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:56:19,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:56:19,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:56:19,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:56:19,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:56:19,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:56:19,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:56:19,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:56:19,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:56:19,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:56:19,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:56:19,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:56:19,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:56:19,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:56:19,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:56:19,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:56:19,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:56:19,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:56:19,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:56:19,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:56:19,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:56:19,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:56:19,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:56:19,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:56:19,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:56:19,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:56:19,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:56:19,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:56:19,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:56:19,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:56:19,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:56:19,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:56:19,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:56:19,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:56:19,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:56:19,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:56:19,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:56:19,756 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 23:56:19,779 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:56:19,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:56:19,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:56:19,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:56:19,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:56:19,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:56:19,780 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:56:19,781 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:56:19,781 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:56:19,781 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:56:19,781 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:56:19,781 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:56:19,782 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:56:19,782 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:56:19,782 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:56:19,782 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:56:19,782 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:56:19,782 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:56:19,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:56:19,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:56:19,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:56:19,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:56:19,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:56:19,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:56:19,784 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:56:19,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:56:19,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:56:19,784 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:56:19,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:56:19,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:56:19,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:56:19,785 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:56:19,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:56:19,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:56:19,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:56:19,962 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:56:19,962 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:56:19,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2023-04-02 23:56:21,055 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:56:21,317 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:56:21,318 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2023-04-02 23:56:21,346 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55bfa8639/07c0c939da314d5a9aa236549a2d2a26/FLAG4071c3773 [2023-04-02 23:56:21,357 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55bfa8639/07c0c939da314d5a9aa236549a2d2a26 [2023-04-02 23:56:21,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:56:21,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:56:21,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:56:21,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:56:21,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:56:21,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a29ae6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21, skipping insertion in model container [2023-04-02 23:56:21,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:56:21,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:56:21,527 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_product29.cil.c[1700,1713] [2023-04-02 23:56:21,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:56:21,698 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:56:21,713 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_product29.cil.c[1700,1713] [2023-04-02 23:56:21,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:56:21,809 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:56:21,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21 WrapperNode [2023-04-02 23:56:21,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:56:21,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:56:21,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:56:21,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:56:21,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,912 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:56:21,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:56:21,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:56:21,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:56:21,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21" (1/1) ... [2023-04-02 23:56:21,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:56:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:21,968 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 23:56:21,982 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 23:56:21,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__1 [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__2 [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__3 [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__4 [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:56:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:56:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:56:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-02 23:56:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:56:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:56:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:56:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:56:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:56:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:56:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:56:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:56:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:56:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:56:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:56:21,999 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:56:21,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:56:21,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:56:21,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__1 [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__2 [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__3 [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__4 [2023-04-02 23:56:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:56:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:56:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:56:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:56:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:56:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:56:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:56:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:56:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:56:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:56:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:56:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:56:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:56:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:56:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:56:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:56:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:56:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:56:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:56:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:56:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:56:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:56:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:56:22,265 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:56:22,280 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:56:23,479 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:56:24,072 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:56:24,072 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:56:24,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:56:24 BoogieIcfgContainer [2023-04-02 23:56:24,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:56:24,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:56:24,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:56:24,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:56:24,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:56:21" (1/3) ... [2023-04-02 23:56:24,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45694faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:56:24, skipping insertion in model container [2023-04-02 23:56:24,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:56:21" (2/3) ... [2023-04-02 23:56:24,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45694faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:56:24, skipping insertion in model container [2023-04-02 23:56:24,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:56:24" (3/3) ... [2023-04-02 23:56:24,080 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product29.cil.c [2023-04-02 23:56:24,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:56:24,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:56:24,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:56:24,136 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;@37715540, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:56:24,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:56:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 565 states, 329 states have (on average 1.4832826747720365) internal successors, (488), 356 states have internal predecessors, (488), 171 states have call successors, (171), 52 states have call predecessors, (171), 52 states have return successors, (171), 162 states have call predecessors, (171), 171 states have call successors, (171) [2023-04-02 23:56:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 23:56:24,155 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:24,155 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:24,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:24,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1064860016, now seen corresponding path program 1 times [2023-04-02 23:56:24,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:24,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74859140] [2023-04-02 23:56:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:24,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:56:24,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:24,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74859140] [2023-04-02 23:56:24,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74859140] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:24,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:24,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:56:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399824803] [2023-04-02 23:56:24,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:24,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:56:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:24,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:56:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:56:25,000 INFO L87 Difference]: Start difference. First operand has 565 states, 329 states have (on average 1.4832826747720365) internal successors, (488), 356 states have internal predecessors, (488), 171 states have call successors, (171), 52 states have call predecessors, (171), 52 states have return successors, (171), 162 states have call predecessors, (171), 171 states have call successors, (171) Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 6 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (23), 7 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-02 23:56:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:27,855 INFO L93 Difference]: Finished difference Result 1388 states and 2117 transitions. [2023-04-02 23:56:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 23:56:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 6 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (23), 7 states have call predecessors, (23), 5 states have call successors, (23) Word has length 106 [2023-04-02 23:56:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:27,886 INFO L225 Difference]: With dead ends: 1388 [2023-04-02 23:56:27,886 INFO L226 Difference]: Without dead ends: 971 [2023-04-02 23:56:27,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:56:27,894 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 1796 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 5094 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1871 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 5673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 5094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:27,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1871 Valid, 938 Invalid, 5673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 5094 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 23:56:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2023-04-02 23:56:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 939. [2023-04-02 23:56:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 621 states have (on average 1.5523349436392915) internal successors, (964), 652 states have internal predecessors, (964), 230 states have call successors, (230), 86 states have call predecessors, (230), 87 states have return successors, (234), 224 states have call predecessors, (234), 222 states have call successors, (234) [2023-04-02 23:56:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1428 transitions. [2023-04-02 23:56:28,034 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1428 transitions. Word has length 106 [2023-04-02 23:56:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:28,035 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 1428 transitions. [2023-04-02 23:56:28,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 6 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (23), 7 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-02 23:56:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1428 transitions. [2023-04-02 23:56:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-02 23:56:28,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:28,042 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:28,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:56:28,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:28,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash -351581167, now seen corresponding path program 1 times [2023-04-02 23:56:28,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:28,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444617205] [2023-04-02 23:56:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:28,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:56:28,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444617205] [2023-04-02 23:56:28,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444617205] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:28,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:28,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:56:28,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970918993] [2023-04-02 23:56:28,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:28,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:56:28,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:28,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:56:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:56:28,326 INFO L87 Difference]: Start difference. First operand 939 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:56:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:28,490 INFO L93 Difference]: Finished difference Result 1503 states and 2301 transitions. [2023-04-02 23:56:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:56:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 111 [2023-04-02 23:56:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:28,498 INFO L225 Difference]: With dead ends: 1503 [2023-04-02 23:56:28,498 INFO L226 Difference]: Without dead ends: 976 [2023-04-02 23:56:28,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:56:28,506 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 7 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3583 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:28,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3583 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2023-04-02 23:56:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 960. [2023-04-02 23:56:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 636 states have (on average 1.5393081761006289) internal successors, (979), 667 states have internal predecessors, (979), 230 states have call successors, (230), 86 states have call predecessors, (230), 93 states have return successors, (249), 230 states have call predecessors, (249), 222 states have call successors, (249) [2023-04-02 23:56:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1458 transitions. [2023-04-02 23:56:28,564 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1458 transitions. Word has length 111 [2023-04-02 23:56:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:28,565 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 1458 transitions. [2023-04-02 23:56:28,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:56:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1458 transitions. [2023-04-02 23:56:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:56:28,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:28,570 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:56:28,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:28,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash 657144655, now seen corresponding path program 1 times [2023-04-02 23:56:28,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:28,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626275681] [2023-04-02 23:56:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:56:28,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:28,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626275681] [2023-04-02 23:56:28,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626275681] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:28,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:28,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:56:28,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494935148] [2023-04-02 23:56:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:28,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:56:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:56:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:56:28,840 INFO L87 Difference]: Start difference. First operand 960 states and 1458 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:56:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:29,030 INFO L93 Difference]: Finished difference Result 1532 states and 2339 transitions. [2023-04-02 23:56:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:56:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 112 [2023-04-02 23:56:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:29,035 INFO L225 Difference]: With dead ends: 1532 [2023-04-02 23:56:29,035 INFO L226 Difference]: Without dead ends: 991 [2023-04-02 23:56:29,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:56:29,041 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 6 mSDsluCounter, 2998 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3607 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:29,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3607 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2023-04-02 23:56:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 963. [2023-04-02 23:56:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 639 states have (on average 1.5367762128325508) internal successors, (982), 667 states have internal predecessors, (982), 230 states have call successors, (230), 86 states have call predecessors, (230), 93 states have return successors, (249), 233 states have call predecessors, (249), 222 states have call successors, (249) [2023-04-02 23:56:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1461 transitions. [2023-04-02 23:56:29,127 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1461 transitions. Word has length 112 [2023-04-02 23:56:29,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:29,129 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 1461 transitions. [2023-04-02 23:56:29,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:56:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1461 transitions. [2023-04-02 23:56:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:56:29,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:29,132 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:29,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:56:29,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:29,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:29,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2123766127, now seen corresponding path program 1 times [2023-04-02 23:56:29,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:29,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000035208] [2023-04-02 23:56:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:29,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:56:29,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:29,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000035208] [2023-04-02 23:56:29,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000035208] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:29,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:29,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:56:29,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101848227] [2023-04-02 23:56:29,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:29,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:56:29,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:56:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:56:29,479 INFO L87 Difference]: Start difference. First operand 963 states and 1461 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:56:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:29,633 INFO L93 Difference]: Finished difference Result 1537 states and 2344 transitions. [2023-04-02 23:56:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:56:29,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 112 [2023-04-02 23:56:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:29,637 INFO L225 Difference]: With dead ends: 1537 [2023-04-02 23:56:29,637 INFO L226 Difference]: Without dead ends: 994 [2023-04-02 23:56:29,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:56:29,639 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 6 mSDsluCounter, 2998 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3607 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:29,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3607 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2023-04-02 23:56:29,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 966. [2023-04-02 23:56:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 642 states have (on average 1.5342679127725856) internal successors, (985), 667 states have internal predecessors, (985), 230 states have call successors, (230), 86 states have call predecessors, (230), 93 states have return successors, (249), 236 states have call predecessors, (249), 222 states have call successors, (249) [2023-04-02 23:56:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1464 transitions. [2023-04-02 23:56:29,672 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1464 transitions. Word has length 112 [2023-04-02 23:56:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:29,673 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 1464 transitions. [2023-04-02 23:56:29,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:56:29,673 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1464 transitions. [2023-04-02 23:56:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-02 23:56:29,675 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:29,675 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:29,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:56:29,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:29,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:29,676 INFO L85 PathProgramCache]: Analyzing trace with hash -678737095, now seen corresponding path program 1 times [2023-04-02 23:56:29,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:29,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883944088] [2023-04-02 23:56:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:29,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:56:30,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:30,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883944088] [2023-04-02 23:56:30,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883944088] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:30,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:30,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:56:30,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303660367] [2023-04-02 23:56:30,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:30,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:56:30,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:30,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:56:30,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:56:30,067 INFO L87 Difference]: Start difference. First operand 966 states and 1464 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 7 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2023-04-02 23:56:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:31,860 INFO L93 Difference]: Finished difference Result 2072 states and 3161 transitions. [2023-04-02 23:56:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:56:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 7 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) Word has length 115 [2023-04-02 23:56:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:31,869 INFO L225 Difference]: With dead ends: 2072 [2023-04-02 23:56:31,869 INFO L226 Difference]: Without dead ends: 1402 [2023-04-02 23:56:31,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:56:31,874 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 2790 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2740 mSolverCounterSat, 1201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2969 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 3941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1201 IncrementalHoareTripleChecker+Valid, 2740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:31,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2969 Valid, 355 Invalid, 3941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1201 Valid, 2740 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 23:56:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2023-04-02 23:56:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1352. [2023-04-02 23:56:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 881 states have (on average 1.4869466515323495) internal successors, (1310), 921 states have internal predecessors, (1310), 331 states have call successors, (331), 128 states have call predecessors, (331), 139 states have return successors, (368), 338 states have call predecessors, (368), 323 states have call successors, (368) [2023-04-02 23:56:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 2009 transitions. [2023-04-02 23:56:31,933 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 2009 transitions. Word has length 115 [2023-04-02 23:56:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:31,933 INFO L495 AbstractCegarLoop]: Abstraction has 1352 states and 2009 transitions. [2023-04-02 23:56:31,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 7 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2023-04-02 23:56:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 2009 transitions. [2023-04-02 23:56:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-02 23:56:31,936 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:31,936 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:31,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:56:31,936 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:31,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash -435961388, now seen corresponding path program 1 times [2023-04-02 23:56:31,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:31,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039987298] [2023-04-02 23:56:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:31,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:56:32,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:32,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039987298] [2023-04-02 23:56:32,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039987298] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:32,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:32,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:56:32,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541494169] [2023-04-02 23:56:32,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:32,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:56:32,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:32,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:56:32,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:56:32,161 INFO L87 Difference]: Start difference. First operand 1352 states and 2009 transitions. Second operand has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (24), 6 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-02 23:56:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:32,462 INFO L93 Difference]: Finished difference Result 2636 states and 4022 transitions. [2023-04-02 23:56:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:56:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (24), 6 states have call predecessors, (24), 4 states have call successors, (24) Word has length 118 [2023-04-02 23:56:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:32,468 INFO L225 Difference]: With dead ends: 2636 [2023-04-02 23:56:32,468 INFO L226 Difference]: Without dead ends: 1556 [2023-04-02 23:56:32,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-02 23:56:32,473 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 231 mSDsluCounter, 4175 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 4813 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:32,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 4813 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:56:32,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-04-02 23:56:32,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1556. [2023-04-02 23:56:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1069 states have (on average 1.500467726847521) internal successors, (1604), 1115 states have internal predecessors, (1604), 336 states have call successors, (336), 133 states have call predecessors, (336), 150 states have return successors, (373), 343 states have call predecessors, (373), 328 states have call successors, (373) [2023-04-02 23:56:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 2313 transitions. [2023-04-02 23:56:32,543 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 2313 transitions. Word has length 118 [2023-04-02 23:56:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:32,544 INFO L495 AbstractCegarLoop]: Abstraction has 1556 states and 2313 transitions. [2023-04-02 23:56:32,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (24), 6 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-02 23:56:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 2313 transitions. [2023-04-02 23:56:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-02 23:56:32,545 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:32,545 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:32,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:56:32,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:32,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:32,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1884979776, now seen corresponding path program 1 times [2023-04-02 23:56:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:32,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374754351] [2023-04-02 23:56:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:32,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:56:32,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:32,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374754351] [2023-04-02 23:56:32,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374754351] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:32,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:32,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:56:32,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924404445] [2023-04-02 23:56:32,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:32,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:56:32,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:32,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:56:32,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:56:32,894 INFO L87 Difference]: Start difference. First operand 1556 states and 2313 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-02 23:56:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:34,088 INFO L93 Difference]: Finished difference Result 2772 states and 4146 transitions. [2023-04-02 23:56:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:56:34,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) Word has length 120 [2023-04-02 23:56:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:34,098 INFO L225 Difference]: With dead ends: 2772 [2023-04-02 23:56:34,098 INFO L226 Difference]: Without dead ends: 1626 [2023-04-02 23:56:34,103 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 23:56:34,109 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1042 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 3200 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 3612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 3200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:34,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 519 Invalid, 3612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 3200 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 23:56:34,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2023-04-02 23:56:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1583. [2023-04-02 23:56:34,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1087 states have (on average 1.4958601655933763) internal successors, (1626), 1137 states have internal predecessors, (1626), 337 states have call successors, (337), 138 states have call predecessors, (337), 158 states have return successors, (384), 343 states have call predecessors, (384), 329 states have call successors, (384) [2023-04-02 23:56:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2347 transitions. [2023-04-02 23:56:34,172 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2347 transitions. Word has length 120 [2023-04-02 23:56:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:34,173 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 2347 transitions. [2023-04-02 23:56:34,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-02 23:56:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2347 transitions. [2023-04-02 23:56:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-02 23:56:34,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:34,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:34,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:56:34,175 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:34,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash 369204923, now seen corresponding path program 1 times [2023-04-02 23:56:34,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:34,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523284749] [2023-04-02 23:56:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:56:34,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:34,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523284749] [2023-04-02 23:56:34,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523284749] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:34,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:34,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:56:34,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165285667] [2023-04-02 23:56:34,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:34,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:56:34,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:34,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:56:34,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:56:34,388 INFO L87 Difference]: Start difference. First operand 1583 states and 2347 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-02 23:56:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:34,704 INFO L93 Difference]: Finished difference Result 1623 states and 2404 transitions. [2023-04-02 23:56:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:56:34,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) Word has length 124 [2023-04-02 23:56:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:34,712 INFO L225 Difference]: With dead ends: 1623 [2023-04-02 23:56:34,712 INFO L226 Difference]: Without dead ends: 1606 [2023-04-02 23:56:34,713 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 23:56:34,713 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 656 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:34,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 1572 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:56:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2023-04-02 23:56:34,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1587. [2023-04-02 23:56:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1091 states have (on average 1.4940421631530705) internal successors, (1630), 1141 states have internal predecessors, (1630), 337 states have call successors, (337), 138 states have call predecessors, (337), 158 states have return successors, (384), 343 states have call predecessors, (384), 329 states have call successors, (384) [2023-04-02 23:56:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2351 transitions. [2023-04-02 23:56:34,779 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2351 transitions. Word has length 124 [2023-04-02 23:56:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:34,779 INFO L495 AbstractCegarLoop]: Abstraction has 1587 states and 2351 transitions. [2023-04-02 23:56:34,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-02 23:56:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2351 transitions. [2023-04-02 23:56:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-02 23:56:34,781 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:34,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:34,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:56:34,781 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:34,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:34,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1474962758, now seen corresponding path program 1 times [2023-04-02 23:56:34,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:34,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718458992] [2023-04-02 23:56:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:34,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:56:35,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:35,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718458992] [2023-04-02 23:56:35,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718458992] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:35,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:35,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:56:35,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601140448] [2023-04-02 23:56:35,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:35,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:56:35,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:35,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:56:35,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:56:35,043 INFO L87 Difference]: Start difference. First operand 1587 states and 2351 transitions. Second operand has 8 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 1 states have call successors, (27) [2023-04-02 23:56:35,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:35,223 INFO L93 Difference]: Finished difference Result 1608 states and 2377 transitions. [2023-04-02 23:56:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:56:35,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 1 states have call successors, (27) Word has length 130 [2023-04-02 23:56:35,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:35,230 INFO L225 Difference]: With dead ends: 1608 [2023-04-02 23:56:35,230 INFO L226 Difference]: Without dead ends: 1591 [2023-04-02 23:56:35,231 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 23:56:35,232 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 10 mSDsluCounter, 3581 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4181 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:35,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4181 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2023-04-02 23:56:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1587. [2023-04-02 23:56:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1091 states have (on average 1.4912923923006416) internal successors, (1627), 1141 states have internal predecessors, (1627), 337 states have call successors, (337), 138 states have call predecessors, (337), 158 states have return successors, (384), 343 states have call predecessors, (384), 329 states have call successors, (384) [2023-04-02 23:56:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2348 transitions. [2023-04-02 23:56:35,299 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2348 transitions. Word has length 130 [2023-04-02 23:56:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:35,299 INFO L495 AbstractCegarLoop]: Abstraction has 1587 states and 2348 transitions. [2023-04-02 23:56:35,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 1 states have call successors, (27) [2023-04-02 23:56:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2348 transitions. [2023-04-02 23:56:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-02 23:56:35,301 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:35,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:35,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:56:35,302 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:35,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:35,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1676084211, now seen corresponding path program 1 times [2023-04-02 23:56:35,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:35,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651873067] [2023-04-02 23:56:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:35,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:56:35,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651873067] [2023-04-02 23:56:35,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651873067] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:35,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:35,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:56:35,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849079361] [2023-04-02 23:56:35,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:35,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:56:35,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:35,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:56:35,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:56:35,390 INFO L87 Difference]: Start difference. First operand 1587 states and 2348 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:56:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:35,604 INFO L93 Difference]: Finished difference Result 4617 states and 6918 transitions. [2023-04-02 23:56:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:56:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 144 [2023-04-02 23:56:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:35,623 INFO L225 Difference]: With dead ends: 4617 [2023-04-02 23:56:35,623 INFO L226 Difference]: Without dead ends: 3072 [2023-04-02 23:56:35,634 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 23:56:35,635 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 587 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:35,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1220 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:35,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2023-04-02 23:56:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3025. [2023-04-02 23:56:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 2121 states have (on average 1.502121640735502) internal successors, (3186), 2217 states have internal predecessors, (3186), 609 states have call successors, (609), 249 states have call predecessors, (609), 294 states have return successors, (732), 612 states have call predecessors, (732), 600 states have call successors, (732) [2023-04-02 23:56:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4527 transitions. [2023-04-02 23:56:35,817 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4527 transitions. Word has length 144 [2023-04-02 23:56:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:35,818 INFO L495 AbstractCegarLoop]: Abstraction has 3025 states and 4527 transitions. [2023-04-02 23:56:35,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:56:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4527 transitions. [2023-04-02 23:56:35,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-02 23:56:35,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:35,821 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:56:35,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:56:35,821 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:35,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2042918125, now seen corresponding path program 1 times [2023-04-02 23:56:35,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:35,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369597245] [2023-04-02 23:56:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:56:35,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:35,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369597245] [2023-04-02 23:56:35,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369597245] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:35,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:35,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:56:35,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205373000] [2023-04-02 23:56:35,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:35,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:56:35,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:56:35,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:56:35,915 INFO L87 Difference]: Start difference. First operand 3025 states and 4527 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:56:36,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:36,212 INFO L93 Difference]: Finished difference Result 8930 states and 13522 transitions. [2023-04-02 23:56:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:56:36,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 146 [2023-04-02 23:56:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:36,243 INFO L225 Difference]: With dead ends: 8930 [2023-04-02 23:56:36,243 INFO L226 Difference]: Without dead ends: 5950 [2023-04-02 23:56:36,257 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 23:56:36,258 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 586 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:36,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 1226 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5950 states. [2023-04-02 23:56:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5950 to 5902. [2023-04-02 23:56:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5902 states, 4182 states have (on average 1.507173601147776) internal successors, (6303), 4370 states have internal predecessors, (6303), 1153 states have call successors, (1153), 471 states have call predecessors, (1153), 566 states have return successors, (1468), 1150 states have call predecessors, (1468), 1142 states have call successors, (1468) [2023-04-02 23:56:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 8924 transitions. [2023-04-02 23:56:36,615 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 8924 transitions. Word has length 146 [2023-04-02 23:56:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:36,616 INFO L495 AbstractCegarLoop]: Abstraction has 5902 states and 8924 transitions. [2023-04-02 23:56:36,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:56:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 8924 transitions. [2023-04-02 23:56:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-02 23:56:36,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:36,619 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:56:36,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 23:56:36,619 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:36,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1092759187, now seen corresponding path program 1 times [2023-04-02 23:56:36,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:36,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228933031] [2023-04-02 23:56:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:56:36,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:36,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228933031] [2023-04-02 23:56:36,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228933031] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:36,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:36,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:56:36,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541365248] [2023-04-02 23:56:36,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:36,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:56:36,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:36,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:56:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:56:36,714 INFO L87 Difference]: Start difference. First operand 5902 states and 8924 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:56:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:37,247 INFO L93 Difference]: Finished difference Result 17557 states and 26930 transitions. [2023-04-02 23:56:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:56:37,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 147 [2023-04-02 23:56:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:37,315 INFO L225 Difference]: With dead ends: 17557 [2023-04-02 23:56:37,316 INFO L226 Difference]: Without dead ends: 11706 [2023-04-02 23:56:37,345 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 23:56:37,346 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 585 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:37,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1232 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11706 states. [2023-04-02 23:56:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11706 to 11657. [2023-04-02 23:56:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11657 states, 8305 states have (on average 1.509090909090909) internal successors, (12533), 8677 states have internal predecessors, (12533), 2241 states have call successors, (2241), 915 states have call predecessors, (2241), 1110 states have return successors, (3078), 2226 states have call predecessors, (3078), 2226 states have call successors, (3078) [2023-04-02 23:56:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11657 states to 11657 states and 17852 transitions. [2023-04-02 23:56:38,041 INFO L78 Accepts]: Start accepts. Automaton has 11657 states and 17852 transitions. Word has length 147 [2023-04-02 23:56:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:38,041 INFO L495 AbstractCegarLoop]: Abstraction has 11657 states and 17852 transitions. [2023-04-02 23:56:38,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:56:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 11657 states and 17852 transitions. [2023-04-02 23:56:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-02 23:56:38,044 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:38,044 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:56:38,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 23:56:38,045 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:38,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash -218055719, now seen corresponding path program 1 times [2023-04-02 23:56:38,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:38,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345493584] [2023-04-02 23:56:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:38,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:56:38,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:38,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345493584] [2023-04-02 23:56:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345493584] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:38,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:38,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:56:38,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710147423] [2023-04-02 23:56:38,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:38,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:56:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:38,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:56:38,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:56:38,174 INFO L87 Difference]: Start difference. First operand 11657 states and 17852 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:56:39,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:39,354 INFO L93 Difference]: Finished difference Result 34812 states and 54439 transitions. [2023-04-02 23:56:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:56:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 147 [2023-04-02 23:56:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:39,462 INFO L225 Difference]: With dead ends: 34812 [2023-04-02 23:56:39,462 INFO L226 Difference]: Without dead ends: 23218 [2023-04-02 23:56:39,509 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 23:56:39,510 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 584 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:39,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 1238 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:39,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23218 states. [2023-04-02 23:56:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23218 to 23168. [2023-04-02 23:56:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23168 states, 16552 states have (on average 1.5093644272595457) internal successors, (24983), 17292 states have internal predecessors, (24983), 4417 states have call successors, (4417), 1803 states have call predecessors, (4417), 2198 states have return successors, (6784), 4378 states have call predecessors, (6784), 4394 states have call successors, (6784) [2023-04-02 23:56:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23168 states to 23168 states and 36184 transitions. [2023-04-02 23:56:40,699 INFO L78 Accepts]: Start accepts. Automaton has 23168 states and 36184 transitions. Word has length 147 [2023-04-02 23:56:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:40,699 INFO L495 AbstractCegarLoop]: Abstraction has 23168 states and 36184 transitions. [2023-04-02 23:56:40,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:56:40,699 INFO L276 IsEmpty]: Start isEmpty. Operand 23168 states and 36184 transitions. [2023-04-02 23:56:40,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 23:56:40,701 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:40,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:40,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 23:56:40,702 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:40,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:40,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2128459285, now seen corresponding path program 1 times [2023-04-02 23:56:40,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:40,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487139440] [2023-04-02 23:56:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:40,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:56:40,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:40,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487139440] [2023-04-02 23:56:40,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487139440] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:40,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:56:40,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:56:40,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951721680] [2023-04-02 23:56:40,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:40,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:56:40,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:40,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:56:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:56:40,789 INFO L87 Difference]: Start difference. First operand 23168 states and 36184 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:56:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:41,865 INFO L93 Difference]: Finished difference Result 24658 states and 38681 transitions. [2023-04-02 23:56:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:56:41,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 149 [2023-04-02 23:56:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:41,995 INFO L225 Difference]: With dead ends: 24658 [2023-04-02 23:56:41,995 INFO L226 Difference]: Without dead ends: 24645 [2023-04-02 23:56:42,018 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 23:56:42,019 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 570 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:42,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1236 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24645 states. [2023-04-02 23:56:43,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24645 to 24596. [2023-04-02 23:56:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24596 states, 17575 states have (on average 1.5089615931721194) internal successors, (26520), 18361 states have internal predecessors, (26520), 4688 states have call successors, (4688), 1913 states have call predecessors, (4688), 2332 states have return successors, (7385), 4645 states have call predecessors, (7385), 4665 states have call successors, (7385) [2023-04-02 23:56:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24596 states to 24596 states and 38593 transitions. [2023-04-02 23:56:43,326 INFO L78 Accepts]: Start accepts. Automaton has 24596 states and 38593 transitions. Word has length 149 [2023-04-02 23:56:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:43,326 INFO L495 AbstractCegarLoop]: Abstraction has 24596 states and 38593 transitions. [2023-04-02 23:56:43,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:56:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 24596 states and 38593 transitions. [2023-04-02 23:56:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-04-02 23:56:43,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:43,335 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:43,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 23:56:43,336 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:43,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:43,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072942, now seen corresponding path program 1 times [2023-04-02 23:56:43,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:43,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281791223] [2023-04-02 23:56:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:43,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-04-02 23:56:43,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:43,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281791223] [2023-04-02 23:56:43,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281791223] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:43,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536330684] [2023-04-02 23:56:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:43,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:43,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:43,692 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 23:56:43,701 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 23:56:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:44,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 3942 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:56:44,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-04-02 23:56:44,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:44,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536330684] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:44,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:44,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-02 23:56:44,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796804449] [2023-04-02 23:56:44,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:44,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:56:44,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:56:44,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:56:44,519 INFO L87 Difference]: Start difference. First operand 24596 states and 38593 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 23:56:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:45,733 INFO L93 Difference]: Finished difference Result 49348 states and 77958 transitions. [2023-04-02 23:56:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:56:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 306 [2023-04-02 23:56:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:45,858 INFO L225 Difference]: With dead ends: 49348 [2023-04-02 23:56:45,859 INFO L226 Difference]: Without dead ends: 24821 [2023-04-02 23:56:45,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:56:45,941 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 10 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:45,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1189 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24821 states. [2023-04-02 23:56:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24821 to 24821. [2023-04-02 23:56:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24821 states, 17755 states have (on average 1.5075190087299353) internal successors, (26766), 18593 states have internal predecessors, (26766), 4688 states have call successors, (4688), 1913 states have call predecessors, (4688), 2377 states have return successors, (7001), 4638 states have call predecessors, (7001), 4665 states have call successors, (7001) [2023-04-02 23:56:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24821 states to 24821 states and 38455 transitions. [2023-04-02 23:56:47,326 INFO L78 Accepts]: Start accepts. Automaton has 24821 states and 38455 transitions. Word has length 306 [2023-04-02 23:56:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:47,327 INFO L495 AbstractCegarLoop]: Abstraction has 24821 states and 38455 transitions. [2023-04-02 23:56:47,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 23:56:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 24821 states and 38455 transitions. [2023-04-02 23:56:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-04-02 23:56:47,332 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:47,333 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:47,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:56:47,542 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,SelfDestructingSolverStorable14 [2023-04-02 23:56:47,543 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:47,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1561998441, now seen corresponding path program 1 times [2023-04-02 23:56:47,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:47,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274214923] [2023-04-02 23:56:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:47,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-04-02 23:56:47,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274214923] [2023-04-02 23:56:47,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274214923] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229387715] [2023-04-02 23:56:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:47,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:47,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:47,979 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 23:56:47,980 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 23:56:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:48,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 3938 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:56:48,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-04-02 23:56:48,624 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:48,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229387715] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:48,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:48,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:56:48,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286073299] [2023-04-02 23:56:48,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:48,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:56:48,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:48,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:56:48,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:56:48,626 INFO L87 Difference]: Start difference. First operand 24821 states and 38455 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2023-04-02 23:56:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:49,933 INFO L93 Difference]: Finished difference Result 51588 states and 81552 transitions. [2023-04-02 23:56:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:56:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 304 [2023-04-02 23:56:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:50,080 INFO L225 Difference]: With dead ends: 51588 [2023-04-02 23:56:50,081 INFO L226 Difference]: Without dead ends: 26810 [2023-04-02 23:56:50,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:56:50,155 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 213 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:50,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1578 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:56:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26810 states. [2023-04-02 23:56:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26810 to 26810. [2023-04-02 23:56:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26810 states, 19693 states have (on average 1.548215101812827) internal successors, (30489), 20531 states have internal predecessors, (30489), 4688 states have call successors, (4688), 1964 states have call predecessors, (4688), 2428 states have return successors, (7001), 4638 states have call predecessors, (7001), 4665 states have call successors, (7001) [2023-04-02 23:56:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26810 states to 26810 states and 42178 transitions. [2023-04-02 23:56:51,506 INFO L78 Accepts]: Start accepts. Automaton has 26810 states and 42178 transitions. Word has length 304 [2023-04-02 23:56:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:51,506 INFO L495 AbstractCegarLoop]: Abstraction has 26810 states and 42178 transitions. [2023-04-02 23:56:51,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2023-04-02 23:56:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 26810 states and 42178 transitions. [2023-04-02 23:56:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-04-02 23:56:51,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:51,513 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:51,539 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 23:56:51,723 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,SelfDestructingSolverStorable15 [2023-04-02 23:56:51,724 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:51,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1940845949, now seen corresponding path program 1 times [2023-04-02 23:56:51,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:51,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26083542] [2023-04-02 23:56:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:51,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-04-02 23:56:51,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:51,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26083542] [2023-04-02 23:56:51,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26083542] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:51,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108709430] [2023-04-02 23:56:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:51,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:51,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:51,986 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 23:56:51,988 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 23:56:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:52,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 3951 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:56:52,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2023-04-02 23:56:52,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:52,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108709430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:52,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:52,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 23:56:52,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056839911] [2023-04-02 23:56:52,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:52,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:56:52,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:52,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:56:52,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:56:52,630 INFO L87 Difference]: Start difference. First operand 26810 states and 42178 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 23:56:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:53,918 INFO L93 Difference]: Finished difference Result 53635 states and 84705 transitions. [2023-04-02 23:56:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:56:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 315 [2023-04-02 23:56:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:54,015 INFO L225 Difference]: With dead ends: 53635 [2023-04-02 23:56:54,015 INFO L226 Difference]: Without dead ends: 26885 [2023-04-02 23:56:54,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 315 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 23:56:54,071 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 8 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:54,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1191 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26885 states. [2023-04-02 23:56:55,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26885 to 26873. [2023-04-02 23:56:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26873 states, 19738 states have (on average 1.5449893606241767) internal successors, (30495), 20597 states have internal predecessors, (30495), 4688 states have call successors, (4688), 1964 states have call predecessors, (4688), 2446 states have return successors, (6789), 4635 states have call predecessors, (6789), 4665 states have call successors, (6789) [2023-04-02 23:56:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26873 states to 26873 states and 41972 transitions. [2023-04-02 23:56:55,286 INFO L78 Accepts]: Start accepts. Automaton has 26873 states and 41972 transitions. Word has length 315 [2023-04-02 23:56:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:55,287 INFO L495 AbstractCegarLoop]: Abstraction has 26873 states and 41972 transitions. [2023-04-02 23:56:55,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 23:56:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 26873 states and 41972 transitions. [2023-04-02 23:56:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-04-02 23:56:55,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:55,293 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:55,304 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 23:56:55,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:55,503 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:55,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:55,503 INFO L85 PathProgramCache]: Analyzing trace with hash 383454600, now seen corresponding path program 1 times [2023-04-02 23:56:55,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:55,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884860704] [2023-04-02 23:56:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:55,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-04-02 23:56:55,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:55,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884860704] [2023-04-02 23:56:55,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884860704] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:55,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808324132] [2023-04-02 23:56:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:55,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:55,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:55,707 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 23:56:55,709 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 23:56:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:56,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 3947 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:56:56,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2023-04-02 23:56:56,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:56,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808324132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:56,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:56,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:56:56,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850818944] [2023-04-02 23:56:56,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:56,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:56:56,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:56,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:56:56,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:56:56,308 INFO L87 Difference]: Start difference. First operand 26873 states and 41972 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2023-04-02 23:56:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:57,812 INFO L93 Difference]: Finished difference Result 55692 states and 88400 transitions. [2023-04-02 23:56:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:56:57,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 313 [2023-04-02 23:56:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:57,916 INFO L225 Difference]: With dead ends: 55692 [2023-04-02 23:56:57,916 INFO L226 Difference]: Without dead ends: 28862 [2023-04-02 23:56:57,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 313 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 23:56:57,980 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 211 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:57,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1578 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:56:58,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28862 states. [2023-04-02 23:56:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28862 to 28862. [2023-04-02 23:56:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28862 states, 21676 states have (on average 1.5786122900904225) internal successors, (34218), 22535 states have internal predecessors, (34218), 4688 states have call successors, (4688), 2015 states have call predecessors, (4688), 2497 states have return successors, (6789), 4635 states have call predecessors, (6789), 4665 states have call successors, (6789) [2023-04-02 23:56:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28862 states to 28862 states and 45695 transitions. [2023-04-02 23:56:59,176 INFO L78 Accepts]: Start accepts. Automaton has 28862 states and 45695 transitions. Word has length 313 [2023-04-02 23:56:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:59,176 INFO L495 AbstractCegarLoop]: Abstraction has 28862 states and 45695 transitions. [2023-04-02 23:56:59,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2023-04-02 23:56:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 28862 states and 45695 transitions. [2023-04-02 23:56:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-04-02 23:56:59,182 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:59,182 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:59,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 23:56:59,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 23:56:59,387 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:59,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1671144449, now seen corresponding path program 1 times [2023-04-02 23:56:59,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:59,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770850076] [2023-04-02 23:56:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 15 proven. 60 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2023-04-02 23:56:59,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:59,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770850076] [2023-04-02 23:56:59,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770850076] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:59,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281436452] [2023-04-02 23:56:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:59,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:59,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:59,651 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 23:56:59,673 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 23:57:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:57:00,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 3956 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:57:00,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:57:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-04-02 23:57:00,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:57:00,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281436452] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:57:00,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:57:00,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:57:00,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856934763] [2023-04-02 23:57:00,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:57:00,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:57:00,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:57:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:57:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:57:00,287 INFO L87 Difference]: Start difference. First operand 28862 states and 45695 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2023-04-02 23:57:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:57:01,679 INFO L93 Difference]: Finished difference Result 59670 states and 95795 transitions. [2023-04-02 23:57:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:57:01,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 322 [2023-04-02 23:57:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:57:01,792 INFO L225 Difference]: With dead ends: 59670 [2023-04-02 23:57:01,792 INFO L226 Difference]: Without dead ends: 30851 [2023-04-02 23:57:01,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 322 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 23:57:01,856 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 209 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:57:01,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1578 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:57:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2023-04-02 23:57:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 30851. [2023-04-02 23:57:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30851 states, 23614 states have (on average 1.6067163547048362) internal successors, (37941), 24473 states have internal predecessors, (37941), 4688 states have call successors, (4688), 2066 states have call predecessors, (4688), 2548 states have return successors, (6789), 4635 states have call predecessors, (6789), 4665 states have call successors, (6789) [2023-04-02 23:57:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30851 states to 30851 states and 49418 transitions. [2023-04-02 23:57:03,126 INFO L78 Accepts]: Start accepts. Automaton has 30851 states and 49418 transitions. Word has length 322 [2023-04-02 23:57:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:57:03,127 INFO L495 AbstractCegarLoop]: Abstraction has 30851 states and 49418 transitions. [2023-04-02 23:57:03,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2023-04-02 23:57:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 30851 states and 49418 transitions. [2023-04-02 23:57:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-02 23:57:03,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:57:03,133 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:57:03,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 23:57:03,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:57:03,343 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:57:03,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:57:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1282236582, now seen corresponding path program 1 times [2023-04-02 23:57:03,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:57:03,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167351855] [2023-04-02 23:57:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:57:03,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:57:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:57:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 22 proven. 55 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-04-02 23:57:03,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:57:03,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167351855] [2023-04-02 23:57:03,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167351855] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:57:03,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643851610] [2023-04-02 23:57:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:57:03,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:57:03,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:57:03,542 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 23:57:03,545 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 23:57:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:57:04,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 3956 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:57:04,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:57:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-04-02 23:57:04,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:57:04,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643851610] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:57:04,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:57:04,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:57:04,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118418545] [2023-04-02 23:57:04,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:57:04,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:57:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:57:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:57:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:57:04,155 INFO L87 Difference]: Start difference. First operand 30851 states and 49418 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-04-02 23:57:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:57:05,411 INFO L93 Difference]: Finished difference Result 63648 states and 103190 transitions. [2023-04-02 23:57:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:57:05,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 324 [2023-04-02 23:57:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:57:05,718 INFO L225 Difference]: With dead ends: 63648 [2023-04-02 23:57:05,718 INFO L226 Difference]: Without dead ends: 32840 [2023-04-02 23:57:05,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 324 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 23:57:05,783 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 207 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:57:05,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1578 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:57:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32840 states. [2023-04-02 23:57:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32840 to 32840. [2023-04-02 23:57:06,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32840 states, 25552 states have (on average 1.63055729492799) internal successors, (41664), 26411 states have internal predecessors, (41664), 4688 states have call successors, (4688), 2117 states have call predecessors, (4688), 2599 states have return successors, (6789), 4635 states have call predecessors, (6789), 4665 states have call successors, (6789) [2023-04-02 23:57:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32840 states to 32840 states and 53141 transitions. [2023-04-02 23:57:07,084 INFO L78 Accepts]: Start accepts. Automaton has 32840 states and 53141 transitions. Word has length 324 [2023-04-02 23:57:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:57:07,085 INFO L495 AbstractCegarLoop]: Abstraction has 32840 states and 53141 transitions. [2023-04-02 23:57:07,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-04-02 23:57:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 32840 states and 53141 transitions. [2023-04-02 23:57:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-04-02 23:57:07,117 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:57:07,117 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:57:07,131 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 23:57:07,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:57:07,319 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:57:07,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:57:07,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1550286062, now seen corresponding path program 1 times [2023-04-02 23:57:07,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:57:07,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176975020] [2023-04-02 23:57:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:57:07,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:57:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:57:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2023-04-02 23:57:08,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:57:08,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176975020] [2023-04-02 23:57:08,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176975020] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:57:08,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716286630] [2023-04-02 23:57:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:57:08,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:57:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:57:08,129 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 23:57:08,154 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 23:57:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:57:08,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 3955 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:57:08,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:57:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2023-04-02 23:57:08,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:57:08,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716286630] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:57:08,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:57:08,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-04-02 23:57:08,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986109921] [2023-04-02 23:57:08,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:57:08,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:57:08,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:57:08,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:57:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:57:08,908 INFO L87 Difference]: Start difference. First operand 32840 states and 53141 transitions. Second operand has 9 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 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 23:57:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:57:13,543 INFO L93 Difference]: Finished difference Result 82551 states and 136703 transitions. [2023-04-02 23:57:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 23:57:13,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 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 333 [2023-04-02 23:57:13,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:57:13,718 INFO L225 Difference]: With dead ends: 82551 [2023-04-02 23:57:13,718 INFO L226 Difference]: Without dead ends: 49760 [2023-04-02 23:57:13,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:57:13,804 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1704 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 6071 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1868 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 6713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 6071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:57:13,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1868 Valid, 749 Invalid, 6713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 6071 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-02 23:57:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49760 states. [2023-04-02 23:57:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49760 to 48465. [2023-04-02 23:57:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48465 states, 37740 states have (on average 1.5832803391626922) internal successors, (59753), 38885 states have internal predecessors, (59753), 6807 states have call successors, (6807), 3241 states have call predecessors, (6807), 3917 states have return successors, (10982), 6794 states have call predecessors, (10982), 6784 states have call successors, (10982) [2023-04-02 23:57:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48465 states to 48465 states and 77542 transitions. [2023-04-02 23:57:16,066 INFO L78 Accepts]: Start accepts. Automaton has 48465 states and 77542 transitions. Word has length 333 [2023-04-02 23:57:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:57:16,066 INFO L495 AbstractCegarLoop]: Abstraction has 48465 states and 77542 transitions. [2023-04-02 23:57:16,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 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 23:57:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 48465 states and 77542 transitions. [2023-04-02 23:57:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2023-04-02 23:57:16,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:57:16,074 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:57:16,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 23:57:16,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:57:16,284 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:57:16,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:57:16,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1275025190, now seen corresponding path program 1 times [2023-04-02 23:57:16,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:57:16,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898943540] [2023-04-02 23:57:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:57:16,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:57:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:57:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2023-04-02 23:57:16,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:57:16,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898943540] [2023-04-02 23:57:16,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898943540] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:57:16,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174159059] [2023-04-02 23:57:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:57:16,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:57:16,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:57:16,780 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 23:57:16,782 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 23:57:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:57:17,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 3948 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 23:57:17,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:57:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-02 23:57:17,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:57:17,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174159059] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:57:17,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:57:17,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-04-02 23:57:17,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95541157] [2023-04-02 23:57:17,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:57:17,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:57:17,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:57:17,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:57:17,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-04-02 23:57:17,534 INFO L87 Difference]: Start difference. First operand 48465 states and 77542 transitions. Second operand has 6 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 3 states have call successors, (58), 3 states have call predecessors, (58), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2023-04-02 23:57:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:57:20,251 INFO L93 Difference]: Finished difference Result 101495 states and 162135 transitions. [2023-04-02 23:57:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:57:20,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 3 states have call successors, (58), 3 states have call predecessors, (58), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) Word has length 328 [2023-04-02 23:57:20,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:57:20,483 INFO L225 Difference]: With dead ends: 101495 [2023-04-02 23:57:20,483 INFO L226 Difference]: Without dead ends: 53077 [2023-04-02 23:57:20,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-04-02 23:57:20,612 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 336 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:57:20,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 2504 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:57:20,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53077 states. [2023-04-02 23:57:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53077 to 52843. [2023-04-02 23:57:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52843 states, 40645 states have (on average 1.562037150941075) internal successors, (63489), 41852 states have internal predecessors, (63489), 7689 states have call successors, (7689), 3822 states have call predecessors, (7689), 4508 states have return successors, (12784), 7624 states have call predecessors, (12784), 7666 states have call successors, (12784) [2023-04-02 23:57:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52843 states to 52843 states and 83962 transitions. [2023-04-02 23:57:23,279 INFO L78 Accepts]: Start accepts. Automaton has 52843 states and 83962 transitions. Word has length 328 [2023-04-02 23:57:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:57:23,280 INFO L495 AbstractCegarLoop]: Abstraction has 52843 states and 83962 transitions. [2023-04-02 23:57:23,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 3 states have call successors, (58), 3 states have call predecessors, (58), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2023-04-02 23:57:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 52843 states and 83962 transitions. [2023-04-02 23:57:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-04-02 23:57:23,287 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:57:23,287 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:57:23,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 23:57:23,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-04-02 23:57:23,498 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:57:23,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:57:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash 13020867, now seen corresponding path program 1 times [2023-04-02 23:57:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:57:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235528992] [2023-04-02 23:57:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:57:23,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:57:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:57:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2023-04-02 23:57:24,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:57:24,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235528992] [2023-04-02 23:57:24,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235528992] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:57:24,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64754614] [2023-04-02 23:57:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:57:24,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:57:24,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:57:24,249 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:57:24,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 23:57:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:57:24,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 3952 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:57:24,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:57:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2023-04-02 23:57:25,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:57:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2023-04-02 23:57:25,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64754614] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:57:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2145634375] [2023-04-02 23:57:25,935 INFO L159 IcfgInterpreter]: Started Sifa with 188 locations of interest [2023-04-02 23:57:25,935 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:57:25,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:57:25,941 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:57:25,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:57:27,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 184 for LOIs [2023-04-02 23:57:28,466 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 239 for LOIs [2023-04-02 23:57:30,750 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 239 for LOIs [2023-04-02 23:57:34,239 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 123071 conjuctions. This might take some time...