/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:37:56,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:37:56,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:37:56,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:37:56,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:37:56,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:37:56,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:37:56,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:37:56,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:37:56,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:37:56,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:37:56,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:37:56,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:37:56,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:37:56,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:37:56,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:37:56,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:37:56,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:37:56,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:37:56,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:37:56,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:37:56,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:37:56,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:37:56,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:37:56,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:37:56,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:37:56,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:37:56,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:37:56,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:37:56,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:37:56,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:37:56,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:37:56,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:37:56,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:37:56,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:37:56,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:37:56,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:37:56,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:37:56,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:37:56,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:37:56,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:37:56,413 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 23:37:56,432 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:37:56,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:37:56,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:37:56,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:37:56,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:37:56,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:37:56,434 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:37:56,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:37:56,434 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:37:56,434 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:37:56,434 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:37:56,434 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:37:56,435 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:37:56,435 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:37:56,435 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:37:56,435 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:37:56,435 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:37:56,435 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:37:56,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:37:56,436 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:37:56,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:37:56,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:37:56,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:37:56,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:37:56,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:37:56,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:37:56,437 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:37:56,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:37:56,438 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:37:56,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:37:56,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:37:56,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:37:56,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:37:56,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:37:56,439 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:37:56,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:37:56,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:37:56,439 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:37:56,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:37:56,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:37:56,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:37:56,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:37:56,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:37:56,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:37:56,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:37:56,719 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:37:56,720 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:37:56,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2023-04-02 23:37:57,807 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:37:58,128 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:37:58,128 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2023-04-02 23:37:58,145 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a53cf8a0/28cd6096fc4b404a832ab17036146eb0/FLAG92105c92b [2023-04-02 23:37:58,157 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a53cf8a0/28cd6096fc4b404a832ab17036146eb0 [2023-04-02 23:37:58,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:37:58,160 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:37:58,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:37:58,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:37:58,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:37:58,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c24c799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58, skipping insertion in model container [2023-04-02 23:37:58,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:37:58,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:37:58,648 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2023-04-02 23:37:58,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:37:58,679 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:37:58,775 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2023-04-02 23:37:58,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:37:58,829 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:37:58,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58 WrapperNode [2023-04-02 23:37:58,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:37:58,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:37:58,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:37:58,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:37:58,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,924 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:37:58,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:37:58,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:37:58,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:37:58,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58" (1/1) ... [2023-04-02 23:37:58,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:37:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:37:58,977 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 23:37:59,016 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 23:37:59,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:37:59,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:37:59,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:37:59,032 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:37:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:37:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:37:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:37:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:37:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:37:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:37:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:37:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:37:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2023-04-02 23:37:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:37:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:37:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:37:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:37:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:37:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:37:59,036 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:37:59,036 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:37:59,036 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:37:59,036 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:37:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:37:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:37:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:37:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:37:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:37:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:37:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:37:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:37:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:37:59,039 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:37:59,039 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:37:59,039 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:37:59,040 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:37:59,040 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:37:59,040 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:37:59,040 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:37:59,041 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:37:59,041 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:37:59,041 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:37:59,041 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:37:59,041 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:37:59,041 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:37:59,042 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:37:59,042 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:37:59,042 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:37:59,042 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:37:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-04-02 23:37:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:37:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:37:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:37:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-02 23:37:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:37:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:37:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:37:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:37:59,045 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:37:59,045 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:37:59,045 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:37:59,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:37:59,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:37:59,046 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:37:59,046 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:37:59,046 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:37:59,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:37:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:37:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:37:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:37:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:37:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:37:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:37:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:37:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:37:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:37:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:37:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:37:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:37:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:37:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:37:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:37:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:37:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:37:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:37:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:37:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:37:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:37:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:37:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:37:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-02 23:37:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-02 23:37:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2023-04-02 23:37:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:37:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:37:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:37:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:37:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:37:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:37:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:37:59,051 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:37:59,051 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:37:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:37:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:37:59,057 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:37:59,057 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:37:59,057 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:37:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:37:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:37:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:37:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:37:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:37:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:37:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2023-04-02 23:37:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:37:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:37:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:37:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:37:59,322 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:37:59,325 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:38:00,545 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:38:01,339 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:38:01,339 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:38:01,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:38:01 BoogieIcfgContainer [2023-04-02 23:38:01,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:38:01,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:38:01,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:38:01,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:38:01,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:37:58" (1/3) ... [2023-04-02 23:38:01,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e9a02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:38:01, skipping insertion in model container [2023-04-02 23:38:01,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:37:58" (2/3) ... [2023-04-02 23:38:01,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e9a02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:38:01, skipping insertion in model container [2023-04-02 23:38:01,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:38:01" (3/3) ... [2023-04-02 23:38:01,353 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product20.cil.c [2023-04-02 23:38:01,369 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:38:01,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:38:01,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:38:01,446 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;@74d29948, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:38:01,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:38:01,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 555 states, 320 states have (on average 1.465625) internal successors, (469), 345 states have internal predecessors, (469), 172 states have call successors, (172), 51 states have call predecessors, (172), 51 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) [2023-04-02 23:38:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 23:38:01,466 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:38:01,467 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] [2023-04-02 23:38:01,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:38:01,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:38:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash 216787446, now seen corresponding path program 1 times [2023-04-02 23:38:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:38:01,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660278340] [2023-04-02 23:38:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:01,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:38:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:02,503 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 23:38:02,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:38:02,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660278340] [2023-04-02 23:38:02,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660278340] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:38:02,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:38:02,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:38:02,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083389073] [2023-04-02 23:38:02,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:38:02,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:38:02,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:38:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:38:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:38:02,556 INFO L87 Difference]: Start difference. First operand has 555 states, 320 states have (on average 1.465625) internal successors, (469), 345 states have internal predecessors, (469), 172 states have call successors, (172), 51 states have call predecessors, (172), 51 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-02 23:38:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:38:02,994 INFO L93 Difference]: Finished difference Result 1247 states and 1886 transitions. [2023-04-02 23:38:02,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:38:02,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 72 [2023-04-02 23:38:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:38:03,021 INFO L225 Difference]: With dead ends: 1247 [2023-04-02 23:38:03,021 INFO L226 Difference]: Without dead ends: 820 [2023-04-02 23:38:03,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:38:03,034 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 606 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:38:03,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 1240 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:38:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2023-04-02 23:38:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 777. [2023-04-02 23:38:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 502 states have (on average 1.5199203187250996) internal successors, (763), 528 states have internal predecessors, (763), 202 states have call successors, (202), 77 states have call predecessors, (202), 72 states have return successors, (205), 184 states have call predecessors, (205), 196 states have call successors, (205) [2023-04-02 23:38:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1170 transitions. [2023-04-02 23:38:03,162 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1170 transitions. Word has length 72 [2023-04-02 23:38:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:38:03,162 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 1170 transitions. [2023-04-02 23:38:03,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-02 23:38:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1170 transitions. [2023-04-02 23:38:03,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-02 23:38:03,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:38:03,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:38:03,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:38:03,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:38:03,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:38:03,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1366960315, now seen corresponding path program 1 times [2023-04-02 23:38:03,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:38:03,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435151567] [2023-04-02 23:38:03,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:03,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:38:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 23:38:03,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:38:03,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435151567] [2023-04-02 23:38:03,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435151567] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:38:03,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:38:03,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:38:03,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647687022] [2023-04-02 23:38:03,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:38:03,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:38:03,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:38:03,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:38:03,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:38:03,834 INFO L87 Difference]: Start difference. First operand 777 states and 1170 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:38:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:38:06,160 INFO L93 Difference]: Finished difference Result 2343 states and 3590 transitions. [2023-04-02 23:38:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:38:06,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 120 [2023-04-02 23:38:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:38:06,172 INFO L225 Difference]: With dead ends: 2343 [2023-04-02 23:38:06,173 INFO L226 Difference]: Without dead ends: 1597 [2023-04-02 23:38:06,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 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 23:38:06,177 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1173 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 3103 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 3103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:38:06,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 591 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 3103 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-02 23:38:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2023-04-02 23:38:06,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1535. [2023-04-02 23:38:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1000 states have (on average 1.522) internal successors, (1522), 1051 states have internal predecessors, (1522), 388 states have call successors, (388), 145 states have call predecessors, (388), 146 states have return successors, (433), 364 states have call predecessors, (433), 380 states have call successors, (433) [2023-04-02 23:38:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2343 transitions. [2023-04-02 23:38:06,279 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2343 transitions. Word has length 120 [2023-04-02 23:38:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:38:06,280 INFO L495 AbstractCegarLoop]: Abstraction has 1535 states and 2343 transitions. [2023-04-02 23:38:06,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:38:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2343 transitions. [2023-04-02 23:38:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-02 23:38:06,283 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:38:06,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:38:06,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:38:06,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:38:06,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:38:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash 385932115, now seen corresponding path program 1 times [2023-04-02 23:38:06,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:38:06,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491570464] [2023-04-02 23:38:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:06,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:38:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 23:38:06,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:38:06,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491570464] [2023-04-02 23:38:06,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491570464] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:38:06,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:38:06,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:38:06,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954855392] [2023-04-02 23:38:06,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:38:06,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:38:06,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:38:06,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:38:06,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:38:06,957 INFO L87 Difference]: Start difference. First operand 1535 states and 2343 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-04-02 23:38:09,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:38:09,436 INFO L93 Difference]: Finished difference Result 1990 states and 2995 transitions. [2023-04-02 23:38:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 23:38:09,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) Word has length 124 [2023-04-02 23:38:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:38:09,448 INFO L225 Difference]: With dead ends: 1990 [2023-04-02 23:38:09,449 INFO L226 Difference]: Without dead ends: 1987 [2023-04-02 23:38:09,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-02 23:38:09,451 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1066 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 4049 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 4701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 4049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:38:09,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 1050 Invalid, 4701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 4049 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 23:38:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2023-04-02 23:38:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1898. [2023-04-02 23:38:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1208 states have (on average 1.4809602649006623) internal successors, (1789), 1272 states have internal predecessors, (1789), 493 states have call successors, (493), 189 states have call predecessors, (493), 196 states have return successors, (565), 469 states have call predecessors, (565), 483 states have call successors, (565) [2023-04-02 23:38:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2847 transitions. [2023-04-02 23:38:09,566 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2847 transitions. Word has length 124 [2023-04-02 23:38:09,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:38:09,567 INFO L495 AbstractCegarLoop]: Abstraction has 1898 states and 2847 transitions. [2023-04-02 23:38:09,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-04-02 23:38:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2847 transitions. [2023-04-02 23:38:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-02 23:38:09,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:38:09,572 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:38:09,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:38:09,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:38:09,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:38:09,573 INFO L85 PathProgramCache]: Analyzing trace with hash -610406452, now seen corresponding path program 1 times [2023-04-02 23:38:09,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:38:09,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563209692] [2023-04-02 23:38:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:09,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:38:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-02 23:38:09,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:38:09,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563209692] [2023-04-02 23:38:09,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563209692] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:38:09,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:38:09,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:38:09,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517275957] [2023-04-02 23:38:09,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:38:09,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:38:09,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:38:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:38:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:38:09,819 INFO L87 Difference]: Start difference. First operand 1898 states and 2847 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:38:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:38:10,032 INFO L93 Difference]: Finished difference Result 3789 states and 5737 transitions. [2023-04-02 23:38:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:38:10,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 160 [2023-04-02 23:38:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:38:10,043 INFO L225 Difference]: With dead ends: 3789 [2023-04-02 23:38:10,043 INFO L226 Difference]: Without dead ends: 1922 [2023-04-02 23:38:10,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:38:10,052 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 10 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:38:10,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2351 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:38:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2023-04-02 23:38:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1922. [2023-04-02 23:38:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1226 states have (on average 1.4738988580750407) internal successors, (1807), 1290 states have internal predecessors, (1807), 493 states have call successors, (493), 189 states have call predecessors, (493), 202 states have return successors, (571), 475 states have call predecessors, (571), 483 states have call successors, (571) [2023-04-02 23:38:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 2871 transitions. [2023-04-02 23:38:10,153 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 2871 transitions. Word has length 160 [2023-04-02 23:38:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:38:10,153 INFO L495 AbstractCegarLoop]: Abstraction has 1922 states and 2871 transitions. [2023-04-02 23:38:10,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:38:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 2871 transitions. [2023-04-02 23:38:10,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-02 23:38:10,158 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:38:10,158 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:38:10,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:38:10,158 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:38:10,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:38:10,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1560255537, now seen corresponding path program 1 times [2023-04-02 23:38:10,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:38:10,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267144203] [2023-04-02 23:38:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:10,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:38:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-02 23:38:10,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:38:10,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267144203] [2023-04-02 23:38:10,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267144203] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:38:10,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820254145] [2023-04-02 23:38:10,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:10,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:38:10,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:38:10,445 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 23:38:10,455 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 23:38:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:11,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 2847 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:38:11,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:38:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 23:38:11,148 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:38:11,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820254145] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:38:11,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:38:11,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:38:11,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253067934] [2023-04-02 23:38:11,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:38:11,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:38:11,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:38:11,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:38:11,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:38:11,150 INFO L87 Difference]: Start difference. First operand 1922 states and 2871 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:38:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:38:11,489 INFO L93 Difference]: Finished difference Result 3969 states and 6076 transitions. [2023-04-02 23:38:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:38:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 165 [2023-04-02 23:38:11,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:38:11,505 INFO L225 Difference]: With dead ends: 3969 [2023-04-02 23:38:11,505 INFO L226 Difference]: Without dead ends: 2078 [2023-04-02 23:38:11,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 167 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 23:38:11,516 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 213 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:38:11,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1557 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:38:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2023-04-02 23:38:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 2078. [2023-04-02 23:38:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 1378 states have (on average 1.52322206095791) internal successors, (2099), 1442 states have internal predecessors, (2099), 493 states have call successors, (493), 193 states have call predecessors, (493), 206 states have return successors, (571), 475 states have call predecessors, (571), 483 states have call successors, (571) [2023-04-02 23:38:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3163 transitions. [2023-04-02 23:38:11,636 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3163 transitions. Word has length 165 [2023-04-02 23:38:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:38:11,637 INFO L495 AbstractCegarLoop]: Abstraction has 2078 states and 3163 transitions. [2023-04-02 23:38:11,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:38:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3163 transitions. [2023-04-02 23:38:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-02 23:38:11,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:38:11,643 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:38:11,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 23:38:11,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:38:11,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:38:11,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:38:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash -341229839, now seen corresponding path program 1 times [2023-04-02 23:38:11,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:38:11,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804465238] [2023-04-02 23:38:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:38:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 23:38:12,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:38:12,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804465238] [2023-04-02 23:38:12,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804465238] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:38:12,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99394730] [2023-04-02 23:38:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:12,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:38:12,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:38:12,159 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 23:38:12,188 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 23:38:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:12,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 2852 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:38:12,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:38:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 23:38:12,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:38:12,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99394730] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:38:12,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:38:12,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:38:12,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030502338] [2023-04-02 23:38:12,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:38:12,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:38:12,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:38:12,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:38:12,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:38:12,747 INFO L87 Difference]: Start difference. First operand 2078 states and 3163 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:38:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:38:13,072 INFO L93 Difference]: Finished difference Result 4281 states and 6656 transitions. [2023-04-02 23:38:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:38:13,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 170 [2023-04-02 23:38:13,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:38:13,086 INFO L225 Difference]: With dead ends: 4281 [2023-04-02 23:38:13,086 INFO L226 Difference]: Without dead ends: 2234 [2023-04-02 23:38:13,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 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 23:38:13,095 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 211 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:38:13,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1557 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:38:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2023-04-02 23:38:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2234. [2023-04-02 23:38:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 1530 states have (on average 1.5627450980392157) internal successors, (2391), 1594 states have internal predecessors, (2391), 493 states have call successors, (493), 197 states have call predecessors, (493), 210 states have return successors, (571), 475 states have call predecessors, (571), 483 states have call successors, (571) [2023-04-02 23:38:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 3455 transitions. [2023-04-02 23:38:13,237 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 3455 transitions. Word has length 170 [2023-04-02 23:38:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:38:13,238 INFO L495 AbstractCegarLoop]: Abstraction has 2234 states and 3455 transitions. [2023-04-02 23:38:13,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:38:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 3455 transitions. [2023-04-02 23:38:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-02 23:38:13,244 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:38:13,244 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:38:13,259 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 23:38:13,453 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,SelfDestructingSolverStorable5 [2023-04-02 23:38:13,454 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:38:13,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:38:13,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1186173183, now seen corresponding path program 1 times [2023-04-02 23:38:13,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:38:13,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833099556] [2023-04-02 23:38:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:13,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:38:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-04-02 23:38:14,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:38:14,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833099556] [2023-04-02 23:38:14,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833099556] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:38:14,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141803165] [2023-04-02 23:38:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:14,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:38:14,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:38:14,073 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 23:38:14,098 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 23:38:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:14,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 2856 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 23:38:14,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:38:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-04-02 23:38:14,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:38:14,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141803165] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:38:14,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:38:14,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-04-02 23:38:14,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718324212] [2023-04-02 23:38:14,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:38:14,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:38:14,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:38:14,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:38:14,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-04-02 23:38:14,748 INFO L87 Difference]: Start difference. First operand 2234 states and 3455 transitions. Second operand has 6 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:38:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:38:15,296 INFO L93 Difference]: Finished difference Result 4434 states and 6903 transitions. [2023-04-02 23:38:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:38:15,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 173 [2023-04-02 23:38:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:38:15,312 INFO L225 Difference]: With dead ends: 4434 [2023-04-02 23:38:15,312 INFO L226 Difference]: Without dead ends: 2230 [2023-04-02 23:38:15,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:38:15,322 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 391 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:38:15,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 2459 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:38:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2023-04-02 23:38:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2230. [2023-04-02 23:38:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 1530 states have (on average 1.5601307189542484) internal successors, (2387), 1590 states have internal predecessors, (2387), 489 states have call successors, (489), 197 states have call predecessors, (489), 210 states have return successors, (559), 475 states have call predecessors, (559), 479 states have call successors, (559) [2023-04-02 23:38:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 3435 transitions. [2023-04-02 23:38:15,442 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 3435 transitions. Word has length 173 [2023-04-02 23:38:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:38:15,442 INFO L495 AbstractCegarLoop]: Abstraction has 2230 states and 3435 transitions. [2023-04-02 23:38:15,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:38:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 3435 transitions. [2023-04-02 23:38:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-04-02 23:38:15,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:38:15,447 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:38:15,459 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 23:38:15,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:38:15,657 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:38:15,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:38:15,657 INFO L85 PathProgramCache]: Analyzing trace with hash -293193183, now seen corresponding path program 1 times [2023-04-02 23:38:15,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:38:15,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495672668] [2023-04-02 23:38:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:15,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:38:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-02 23:38:15,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:38:15,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495672668] [2023-04-02 23:38:15,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495672668] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:38:15,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647085199] [2023-04-02 23:38:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:15,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:38:15,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:38:15,883 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 23:38:15,885 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 23:38:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:16,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 2856 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:38:16,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:38:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 23:38:16,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:38:16,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647085199] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:38:16,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:38:16,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:38:16,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231800287] [2023-04-02 23:38:16,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:38:16,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:38:16,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:38:16,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:38:16,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:38:16,449 INFO L87 Difference]: Start difference. First operand 2230 states and 3435 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:38:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:38:16,744 INFO L93 Difference]: Finished difference Result 4585 states and 7190 transitions. [2023-04-02 23:38:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:38:16,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 174 [2023-04-02 23:38:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:38:16,759 INFO L225 Difference]: With dead ends: 4585 [2023-04-02 23:38:16,759 INFO L226 Difference]: Without dead ends: 2386 [2023-04-02 23:38:16,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 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 23:38:16,769 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 209 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:38:16,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1557 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:38:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2023-04-02 23:38:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2386. [2023-04-02 23:38:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 1682 states have (on average 1.5927467300832343) internal successors, (2679), 1742 states have internal predecessors, (2679), 489 states have call successors, (489), 201 states have call predecessors, (489), 214 states have return successors, (559), 475 states have call predecessors, (559), 479 states have call successors, (559) [2023-04-02 23:38:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 3727 transitions. [2023-04-02 23:38:16,894 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 3727 transitions. Word has length 174 [2023-04-02 23:38:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:38:16,895 INFO L495 AbstractCegarLoop]: Abstraction has 2386 states and 3727 transitions. [2023-04-02 23:38:16,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:38:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 3727 transitions. [2023-04-02 23:38:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-02 23:38:16,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:38:16,900 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:16,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:38:17,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:38:17,110 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:38:17,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:38:17,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1221348527, now seen corresponding path program 1 times [2023-04-02 23:38:17,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:38:17,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326903554] [2023-04-02 23:38:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:17,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:38:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 23:38:17,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:38:17,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326903554] [2023-04-02 23:38:17,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326903554] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:38:17,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356481495] [2023-04-02 23:38:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:17,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:38:17,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:38:17,349 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 23:38:17,352 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 23:38:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:17,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:38:17,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:38:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 23:38:17,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:38:17,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356481495] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:38:17,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:38:17,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:38:17,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064559275] [2023-04-02 23:38:17,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:38:17,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:38:17,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:38:17,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:38:17,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:38:17,871 INFO L87 Difference]: Start difference. First operand 2386 states and 3727 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:38:18,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:38:18,155 INFO L93 Difference]: Finished difference Result 4897 states and 7770 transitions. [2023-04-02 23:38:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:38:18,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 177 [2023-04-02 23:38:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:38:18,169 INFO L225 Difference]: With dead ends: 4897 [2023-04-02 23:38:18,169 INFO L226 Difference]: Without dead ends: 2542 [2023-04-02 23:38:18,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 177 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 23:38:18,178 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 207 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:38:18,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1557 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:38:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2023-04-02 23:38:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2542. [2023-04-02 23:38:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 1834 states have (on average 1.6199563794983642) internal successors, (2971), 1894 states have internal predecessors, (2971), 489 states have call successors, (489), 205 states have call predecessors, (489), 218 states have return successors, (559), 475 states have call predecessors, (559), 479 states have call successors, (559) [2023-04-02 23:38:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 4019 transitions. [2023-04-02 23:38:18,285 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 4019 transitions. Word has length 177 [2023-04-02 23:38:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:38:18,286 INFO L495 AbstractCegarLoop]: Abstraction has 2542 states and 4019 transitions. [2023-04-02 23:38:18,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:38:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 4019 transitions. [2023-04-02 23:38:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-02 23:38:18,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:38:18,293 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:38:18,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:38:18,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:38:18,504 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:38:18,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:38:18,505 INFO L85 PathProgramCache]: Analyzing trace with hash -130314659, now seen corresponding path program 1 times [2023-04-02 23:38:18,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:38:18,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257694486] [2023-04-02 23:38:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:18,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:38:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-02 23:38:19,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:38:19,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257694486] [2023-04-02 23:38:19,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257694486] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:38:19,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31996723] [2023-04-02 23:38:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:38:19,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:38:19,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:38:19,021 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 23:38:19,023 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 23:38:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:38:19,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 2855 conjuncts, 198 conjunts are in the unsatisfiable core [2023-04-02 23:38:19,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:38:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-02 23:38:21,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:39:07,001 WARN L223 SmtUtils]: Spent 41.68s on a formula simplification. DAG size of input: 1457 DAG size of output: 67 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-02 23:39:49,314 WARN L223 SmtUtils]: Spent 41.61s on a formula simplification. DAG size of input: 1457 DAG size of output: 67 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-02 23:40:31,617 WARN L223 SmtUtils]: Spent 41.63s on a formula simplification. DAG size of input: 1457 DAG size of output: 67 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-02 23:40:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-02 23:40:32,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31996723] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:40:32,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918646874] [2023-04-02 23:40:32,378 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2023-04-02 23:40:32,378 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:40:32,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:40:32,388 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:40:32,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:40:34,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 175 for LOIs [2023-04-02 23:40:34,715 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 226 for LOIs [2023-04-02 23:40:37,461 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 226 for LOIs [2023-04-02 23:40:37,876 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 226 for LOIs [2023-04-02 23:40:40,553 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 123071 conjuctions. This might take some time...