/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:55:40,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:55:40,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:55:40,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:55:40,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:55:40,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:55:40,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:55:40,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:55:40,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:55:40,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:55:40,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:55:40,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:55:40,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:55:40,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:55:40,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:55:40,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:55:40,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:55:40,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:55:40,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:55:40,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:55:40,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:55:40,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:55:40,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:55:40,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:55:40,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:55:40,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:55:40,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:55:40,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:55:40,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:55:40,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:55:40,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:55:40,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:55:40,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:55:40,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:55:40,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:55:40,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:55:40,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:55:40,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:55:40,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:55:40,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:55:40,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:55:40,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 23:55:40,459 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:55:40,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:55:40,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:55:40,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:55:40,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:55:40,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:55:40,461 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:55:40,461 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:55:40,461 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:55:40,461 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:55:40,462 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:55:40,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:55:40,462 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:55:40,462 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:55:40,462 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:55:40,462 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:55:40,462 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:55:40,462 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:55:40,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:55:40,463 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:55:40,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:55:40,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:55:40,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:55:40,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:55:40,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:55:40,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:55:40,464 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:55:40,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:55:40,464 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:55:40,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:55:40,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:55:40,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:55:40,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:55:40,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:55:40,465 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:55:40,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:55:40,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:55:40,465 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:55:40,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:55:40,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:55:40,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:55:40,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:55:40,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:55:40,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:55:40,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:55:40,659 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:55:40,660 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:55:40,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2023-04-02 23:55:41,672 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:55:41,909 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:55:41,910 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2023-04-02 23:55:41,929 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee2faa27a/0ed575192eed42e686b18cfbd846f462/FLAGad9cbdb51 [2023-04-02 23:55:41,939 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee2faa27a/0ed575192eed42e686b18cfbd846f462 [2023-04-02 23:55:41,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:55:41,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:55:41,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:55:41,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:55:41,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:55:41,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:55:41" (1/1) ... [2023-04-02 23:55:41,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25fc4d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:41, skipping insertion in model container [2023-04-02 23:55:41,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:55:41" (1/1) ... [2023-04-02 23:55:41,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:55:42,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:55:42,203 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2023-04-02 23:55:42,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:55:42,308 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:55:42,345 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2023-04-02 23:55:42,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:55:42,412 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:55:42,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42 WrapperNode [2023-04-02 23:55:42,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:55:42,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:55:42,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:55:42,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:55:42,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42" (1/1) ... [2023-04-02 23:55:42,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42" (1/1) ... [2023-04-02 23:55:42,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42" (1/1) ... [2023-04-02 23:55:42,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42" (1/1) ... [2023-04-02 23:55:42,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42" (1/1) ... [2023-04-02 23:55:42,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42" (1/1) ... [2023-04-02 23:55:42,512 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42" (1/1) ... [2023-04-02 23:55:42,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42" (1/1) ... [2023-04-02 23:55:42,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:55:42,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:55:42,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:55:42,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:55:42,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42" (1/1) ... [2023-04-02 23:55:42,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:55:42,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:42,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 23:55:42,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 23:55:42,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:55:42,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:55:42,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:55:42,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:55:42,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__1 [2023-04-02 23:55:42,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__2 [2023-04-02 23:55:42,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__3 [2023-04-02 23:55:42,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__4 [2023-04-02 23:55:42,603 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:55:42,603 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:55:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:55:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:55:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:55:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:55:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:55:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:55:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:55:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:55:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:55:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:55:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:55:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:55:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:55:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:55:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:55:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:55:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:55:42,621 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:55:42,629 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:55:42,629 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:55:42,629 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:55:42,629 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:55:42,629 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:55:42,629 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-02 23:55:42,629 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:55:42,630 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:55:42,630 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:55:42,630 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:55:42,630 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:55:42,631 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:55:42,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:55:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:55:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:55:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:55:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:55:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:55:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:55:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:55:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:55:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__1 [2023-04-02 23:55:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__2 [2023-04-02 23:55:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__3 [2023-04-02 23:55:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__4 [2023-04-02 23:55:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:55:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:55:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:55:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:55:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:55:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:55:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:55:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:55:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:55:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:55:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:55:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:55:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:55:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:55:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:55:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:55:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:55:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:55:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:55:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:55:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:55:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:55:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:55:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:55:42,889 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:55:42,891 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:55:43,811 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:55:44,398 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:55:44,398 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:55:44,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:55:44 BoogieIcfgContainer [2023-04-02 23:55:44,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:55:44,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:55:44,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:55:44,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:55:44,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:55:41" (1/3) ... [2023-04-02 23:55:44,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55fc6fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:55:44, skipping insertion in model container [2023-04-02 23:55:44,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:42" (2/3) ... [2023-04-02 23:55:44,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55fc6fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:55:44, skipping insertion in model container [2023-04-02 23:55:44,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:55:44" (3/3) ... [2023-04-02 23:55:44,409 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product25.cil.c [2023-04-02 23:55:44,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:55:44,422 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:55:44,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:55:44,488 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;@6bf58d50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:55:44,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:55:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 540 states, 314 states have (on average 1.4968152866242037) internal successors, (470), 341 states have internal predecessors, (470), 164 states have call successors, (164), 49 states have call predecessors, (164), 49 states have return successors, (164), 155 states have call predecessors, (164), 164 states have call successors, (164) [2023-04-02 23:55:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-02 23:55:44,517 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:44,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:44,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:44,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:44,523 INFO L85 PathProgramCache]: Analyzing trace with hash 726926531, now seen corresponding path program 1 times [2023-04-02 23:55:44,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:44,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797138152] [2023-04-02 23:55:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:44,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:55:45,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:45,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797138152] [2023-04-02 23:55:45,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797138152] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:45,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:45,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:55:45,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204101026] [2023-04-02 23:55:45,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:45,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:55:45,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:45,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:55:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:45,220 INFO L87 Difference]: Start difference. First operand has 540 states, 314 states have (on average 1.4968152866242037) internal successors, (470), 341 states have internal predecessors, (470), 164 states have call successors, (164), 49 states have call predecessors, (164), 49 states have return successors, (164), 155 states have call predecessors, (164), 164 states have call successors, (164) Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-02 23:55:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:45,615 INFO L93 Difference]: Finished difference Result 832 states and 1275 transitions. [2023-04-02 23:55:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:55:45,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) Word has length 92 [2023-04-02 23:55:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:45,630 INFO L225 Difference]: With dead ends: 832 [2023-04-02 23:55:45,630 INFO L226 Difference]: Without dead ends: 448 [2023-04-02 23:55:45,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:45,651 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 34 mSDsluCounter, 3562 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 4160 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:45,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 4160 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:55:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-04-02 23:55:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 413. [2023-04-02 23:55:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 261 states have (on average 1.5363984674329503) internal successors, (401), 280 states have internal predecessors, (401), 109 states have call successors, (109), 45 states have call predecessors, (109), 42 states have return successors, (102), 99 states have call predecessors, (102), 101 states have call successors, (102) [2023-04-02 23:55:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 612 transitions. [2023-04-02 23:55:45,726 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 612 transitions. Word has length 92 [2023-04-02 23:55:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:45,727 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 612 transitions. [2023-04-02 23:55:45,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-02 23:55:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 612 transitions. [2023-04-02 23:55:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-02 23:55:45,731 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:45,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:45,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:55:45,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:45,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash -856331579, now seen corresponding path program 1 times [2023-04-02 23:55:45,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:45,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966928109] [2023-04-02 23:55:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:45,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:55:46,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:46,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966928109] [2023-04-02 23:55:46,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966928109] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:46,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:46,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:55:46,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380076354] [2023-04-02 23:55:46,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:46,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:55:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:55:46,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:55:46,129 INFO L87 Difference]: Start difference. First operand 413 states and 612 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-02 23:55:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:48,037 INFO L93 Difference]: Finished difference Result 1270 states and 1945 transitions. [2023-04-02 23:55:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 23:55:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 97 [2023-04-02 23:55:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:48,049 INFO L225 Difference]: With dead ends: 1270 [2023-04-02 23:55:48,049 INFO L226 Difference]: Without dead ends: 899 [2023-04-02 23:55:48,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:55:48,059 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1674 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 3206 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 3707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 3206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:48,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1746 Valid, 606 Invalid, 3707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 3206 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 23:55:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-04-02 23:55:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 872. [2023-04-02 23:55:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 580 states have (on average 1.5775862068965518) internal successors, (915), 615 states have internal predecessors, (915), 212 states have call successors, (212), 78 states have call predecessors, (212), 79 states have return successors, (212), 202 states have call predecessors, (212), 204 states have call successors, (212) [2023-04-02 23:55:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1339 transitions. [2023-04-02 23:55:48,142 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1339 transitions. Word has length 97 [2023-04-02 23:55:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:48,142 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1339 transitions. [2023-04-02 23:55:48,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-02 23:55:48,142 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1339 transitions. [2023-04-02 23:55:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 23:55:48,145 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:48,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:48,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:55:48,145 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:48,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:48,146 INFO L85 PathProgramCache]: Analyzing trace with hash 364978824, now seen corresponding path program 1 times [2023-04-02 23:55:48,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:48,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428313784] [2023-04-02 23:55:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:55:48,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:48,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428313784] [2023-04-02 23:55:48,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428313784] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:48,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:48,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:55:48,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943045581] [2023-04-02 23:55:48,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:48,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:55:48,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:48,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:55:48,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:55:48,301 INFO L87 Difference]: Start difference. First operand 872 states and 1339 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-04-02 23:55:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:48,455 INFO L93 Difference]: Finished difference Result 1380 states and 2133 transitions. [2023-04-02 23:55:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:48,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 101 [2023-04-02 23:55:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:48,460 INFO L225 Difference]: With dead ends: 1380 [2023-04-02 23:55:48,460 INFO L226 Difference]: Without dead ends: 894 [2023-04-02 23:55:48,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:55:48,463 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 7 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:48,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2260 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-04-02 23:55:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 884. [2023-04-02 23:55:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 589 states have (on average 1.5687606112054329) internal successors, (924), 624 states have internal predecessors, (924), 212 states have call successors, (212), 78 states have call predecessors, (212), 82 states have return successors, (218), 205 states have call predecessors, (218), 204 states have call successors, (218) [2023-04-02 23:55:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1354 transitions. [2023-04-02 23:55:48,507 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1354 transitions. Word has length 101 [2023-04-02 23:55:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:48,508 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1354 transitions. [2023-04-02 23:55:48,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-04-02 23:55:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1354 transitions. [2023-04-02 23:55:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 23:55:48,511 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:48,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:48,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:55:48,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:48,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1555145312, now seen corresponding path program 1 times [2023-04-02 23:55:48,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:48,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221556269] [2023-04-02 23:55:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:48,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:55:48,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:48,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221556269] [2023-04-02 23:55:48,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221556269] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:48,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:48,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:55:48,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122506657] [2023-04-02 23:55:48,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:48,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:55:48,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:55:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:48,853 INFO L87 Difference]: Start difference. First operand 884 states and 1354 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2023-04-02 23:55:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:50,727 INFO L93 Difference]: Finished difference Result 1873 states and 2875 transitions. [2023-04-02 23:55:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:55:50,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 105 [2023-04-02 23:55:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:50,734 INFO L225 Difference]: With dead ends: 1873 [2023-04-02 23:55:50,734 INFO L226 Difference]: Without dead ends: 1279 [2023-04-02 23:55:50,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:55:50,736 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 2268 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 3139 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2430 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 4067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 3139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:50,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2430 Valid, 403 Invalid, 4067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 3139 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 23:55:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2023-04-02 23:55:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1229. [2023-04-02 23:55:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 803 states have (on average 1.518057285180573) internal successors, (1219), 855 states have internal predecessors, (1219), 302 states have call successors, (302), 115 states have call predecessors, (302), 123 states have return successors, (318), 294 states have call predecessors, (318), 294 states have call successors, (318) [2023-04-02 23:55:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1839 transitions. [2023-04-02 23:55:50,816 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1839 transitions. Word has length 105 [2023-04-02 23:55:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:50,816 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 1839 transitions. [2023-04-02 23:55:50,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2023-04-02 23:55:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1839 transitions. [2023-04-02 23:55:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 23:55:50,818 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:50,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:50,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:55:50,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:50,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:50,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1013803254, now seen corresponding path program 1 times [2023-04-02 23:55:50,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:50,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229125811] [2023-04-02 23:55:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:50,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:55:51,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:51,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229125811] [2023-04-02 23:55:51,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229125811] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:51,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:51,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:55:51,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348330116] [2023-04-02 23:55:51,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:51,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:55:51,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:51,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:55:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:55:51,021 INFO L87 Difference]: Start difference. First operand 1229 states and 1839 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:55:51,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:51,238 INFO L93 Difference]: Finished difference Result 2312 states and 3548 transitions. [2023-04-02 23:55:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:55:51,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 108 [2023-04-02 23:55:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:51,244 INFO L225 Difference]: With dead ends: 2312 [2023-04-02 23:55:51,244 INFO L226 Difference]: Without dead ends: 1229 [2023-04-02 23:55:51,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:51,251 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 211 mSDsluCounter, 2738 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:51,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 3332 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2023-04-02 23:55:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1229. [2023-04-02 23:55:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 803 states have (on average 1.4782067247820672) internal successors, (1187), 855 states have internal predecessors, (1187), 302 states have call successors, (302), 115 states have call predecessors, (302), 123 states have return successors, (318), 294 states have call predecessors, (318), 294 states have call successors, (318) [2023-04-02 23:55:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1807 transitions. [2023-04-02 23:55:51,342 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1807 transitions. Word has length 108 [2023-04-02 23:55:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:51,342 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 1807 transitions. [2023-04-02 23:55:51,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:55:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1807 transitions. [2023-04-02 23:55:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 23:55:51,344 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:51,344 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:51,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:55:51,345 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:51,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:51,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2097252871, now seen corresponding path program 1 times [2023-04-02 23:55:51,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:51,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419169929] [2023-04-02 23:55:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:51,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:51,694 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 23:55:51,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:51,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419169929] [2023-04-02 23:55:51,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419169929] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:51,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:51,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:55:51,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224714142] [2023-04-02 23:55:51,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:51,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:55:51,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:51,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:55:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:55:51,696 INFO L87 Difference]: Start difference. First operand 1229 states and 1807 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:55:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:53,243 INFO L93 Difference]: Finished difference Result 2181 states and 3218 transitions. [2023-04-02 23:55:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:55:53,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 110 [2023-04-02 23:55:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:53,250 INFO L225 Difference]: With dead ends: 2181 [2023-04-02 23:55:53,250 INFO L226 Difference]: Without dead ends: 1299 [2023-04-02 23:55:53,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:55:53,253 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 965 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 3366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:53,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 499 Invalid, 3366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 2976 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 23:55:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2023-04-02 23:55:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1256. [2023-04-02 23:55:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 821 states have (on average 1.4725943970767357) internal successors, (1209), 877 states have internal predecessors, (1209), 303 states have call successors, (303), 120 states have call predecessors, (303), 131 states have return successors, (329), 294 states have call predecessors, (329), 295 states have call successors, (329) [2023-04-02 23:55:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1841 transitions. [2023-04-02 23:55:53,307 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1841 transitions. Word has length 110 [2023-04-02 23:55:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:53,308 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1841 transitions. [2023-04-02 23:55:53,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:55:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1841 transitions. [2023-04-02 23:55:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-02 23:55:53,309 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:53,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:53,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:55:53,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:53,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:53,310 INFO L85 PathProgramCache]: Analyzing trace with hash -702705924, now seen corresponding path program 1 times [2023-04-02 23:55:53,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:53,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207820467] [2023-04-02 23:55:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:53,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:55:53,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:53,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207820467] [2023-04-02 23:55:53,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207820467] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:53,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:53,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:55:53,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012614281] [2023-04-02 23:55:53,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:53,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:55:53,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:53,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:55:53,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:55:53,538 INFO L87 Difference]: Start difference. First operand 1256 states and 1841 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:55:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:54,007 INFO L93 Difference]: Finished difference Result 1296 states and 1898 transitions. [2023-04-02 23:55:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 117 [2023-04-02 23:55:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:54,013 INFO L225 Difference]: With dead ends: 1296 [2023-04-02 23:55:54,013 INFO L226 Difference]: Without dead ends: 1279 [2023-04-02 23:55:54,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:54,014 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 615 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:54,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 1810 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:55:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2023-04-02 23:55:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1260. [2023-04-02 23:55:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 825 states have (on average 1.4703030303030302) internal successors, (1213), 881 states have internal predecessors, (1213), 303 states have call successors, (303), 120 states have call predecessors, (303), 131 states have return successors, (329), 294 states have call predecessors, (329), 295 states have call successors, (329) [2023-04-02 23:55:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1845 transitions. [2023-04-02 23:55:54,068 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1845 transitions. Word has length 117 [2023-04-02 23:55:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:54,069 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 1845 transitions. [2023-04-02 23:55:54,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:55:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1845 transitions. [2023-04-02 23:55:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-02 23:55:54,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:54,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:54,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:55:54,071 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:54,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash 301697557, now seen corresponding path program 1 times [2023-04-02 23:55:54,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:54,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26777539] [2023-04-02 23:55:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:54,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:55:54,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:54,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26777539] [2023-04-02 23:55:54,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26777539] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:54,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:54,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:55:54,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394274552] [2023-04-02 23:55:54,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:54,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:55:54,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:55:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:54,278 INFO L87 Difference]: Start difference. First operand 1260 states and 1845 transitions. Second operand has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-04-02 23:55:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:54,432 INFO L93 Difference]: Finished difference Result 1281 states and 1871 transitions. [2023-04-02 23:55:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:55:54,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) Word has length 119 [2023-04-02 23:55:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:54,438 INFO L225 Difference]: With dead ends: 1281 [2023-04-02 23:55:54,438 INFO L226 Difference]: Without dead ends: 1264 [2023-04-02 23:55:54,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:55:54,439 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 10 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3894 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:54,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3894 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:54,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2023-04-02 23:55:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1260. [2023-04-02 23:55:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 825 states have (on average 1.4666666666666666) internal successors, (1210), 881 states have internal predecessors, (1210), 303 states have call successors, (303), 120 states have call predecessors, (303), 131 states have return successors, (329), 294 states have call predecessors, (329), 295 states have call successors, (329) [2023-04-02 23:55:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1842 transitions. [2023-04-02 23:55:54,494 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1842 transitions. Word has length 119 [2023-04-02 23:55:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:54,494 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 1842 transitions. [2023-04-02 23:55:54,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-04-02 23:55:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1842 transitions. [2023-04-02 23:55:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 23:55:54,496 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:54,496 INFO L195 NwaCegarLoop]: trace histogram [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 23:55:54,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:55:54,496 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:54,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1978714007, now seen corresponding path program 1 times [2023-04-02 23:55:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:54,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926356801] [2023-04-02 23:55:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:54,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:55:54,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:54,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926356801] [2023-04-02 23:55:54,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926356801] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:54,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:54,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:54,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722295840] [2023-04-02 23:55:54,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:54,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:54,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:54,582 INFO L87 Difference]: Start difference. First operand 1260 states and 1842 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:54,760 INFO L93 Difference]: Finished difference Result 3636 states and 5400 transitions. [2023-04-02 23:55:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:54,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 137 [2023-04-02 23:55:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:54,769 INFO L225 Difference]: With dead ends: 3636 [2023-04-02 23:55:54,769 INFO L226 Difference]: Without dead ends: 2418 [2023-04-02 23:55:54,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:54,773 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 545 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:54,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1138 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2023-04-02 23:55:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 2371. [2023-04-02 23:55:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 1589 states have (on average 1.4801762114537445) internal successors, (2352), 1697 states have internal predecessors, (2352), 541 states have call successors, (541), 213 states have call predecessors, (541), 240 states have return successors, (622), 514 states have call predecessors, (622), 532 states have call successors, (622) [2023-04-02 23:55:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 3515 transitions. [2023-04-02 23:55:54,875 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 3515 transitions. Word has length 137 [2023-04-02 23:55:54,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:54,877 INFO L495 AbstractCegarLoop]: Abstraction has 2371 states and 3515 transitions. [2023-04-02 23:55:54,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 3515 transitions. [2023-04-02 23:55:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-02 23:55:54,879 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:54,879 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:54,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:55:54,879 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:54,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:54,880 INFO L85 PathProgramCache]: Analyzing trace with hash -336444353, now seen corresponding path program 1 times [2023-04-02 23:55:54,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:54,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283120717] [2023-04-02 23:55:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:54,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:55:54,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:54,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283120717] [2023-04-02 23:55:54,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283120717] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:54,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:54,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209084329] [2023-04-02 23:55:54,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:54,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:54,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:54,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:54,970 INFO L87 Difference]: Start difference. First operand 2371 states and 3515 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:55,248 INFO L93 Difference]: Finished difference Result 6968 states and 10486 transitions. [2023-04-02 23:55:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:55,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 135 [2023-04-02 23:55:55,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:55,270 INFO L225 Difference]: With dead ends: 6968 [2023-04-02 23:55:55,270 INFO L226 Difference]: Without dead ends: 4642 [2023-04-02 23:55:55,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:55,279 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 544 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:55,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1144 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4642 states. [2023-04-02 23:55:55,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4642 to 4594. [2023-04-02 23:55:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4594 states, 3118 states have (on average 1.486529826812059) internal successors, (4635), 3330 states have internal predecessors, (4635), 1017 states have call successors, (1017), 399 states have call predecessors, (1017), 458 states have return successors, (1248), 954 states have call predecessors, (1248), 1006 states have call successors, (1248) [2023-04-02 23:55:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4594 states to 4594 states and 6900 transitions. [2023-04-02 23:55:55,508 INFO L78 Accepts]: Start accepts. Automaton has 4594 states and 6900 transitions. Word has length 135 [2023-04-02 23:55:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:55,509 INFO L495 AbstractCegarLoop]: Abstraction has 4594 states and 6900 transitions. [2023-04-02 23:55:55,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4594 states and 6900 transitions. [2023-04-02 23:55:55,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-02 23:55:55,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:55,513 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:55,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:55:55,513 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:55,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1841110147, now seen corresponding path program 1 times [2023-04-02 23:55:55,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:55,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501185182] [2023-04-02 23:55:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:55,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:55:55,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:55,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501185182] [2023-04-02 23:55:55,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501185182] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:55,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:55,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:55,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658725526] [2023-04-02 23:55:55,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:55,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:55,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:55,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:55,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:55,639 INFO L87 Difference]: Start difference. First operand 4594 states and 6900 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:56,065 INFO L93 Difference]: Finished difference Result 13633 states and 20858 transitions. [2023-04-02 23:55:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:56,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 136 [2023-04-02 23:55:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:56,113 INFO L225 Difference]: With dead ends: 13633 [2023-04-02 23:55:56,113 INFO L226 Difference]: Without dead ends: 9090 [2023-04-02 23:55:56,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:56,129 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 543 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:56,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1150 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:56,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9090 states. [2023-04-02 23:55:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9090 to 9041. [2023-04-02 23:55:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9041 states, 6177 states have (on average 1.4889104743402946) internal successors, (9197), 6597 states have internal predecessors, (9197), 1969 states have call successors, (1969), 771 states have call predecessors, (1969), 894 states have return successors, (2638), 1834 states have call predecessors, (2638), 1954 states have call successors, (2638) [2023-04-02 23:55:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9041 states to 9041 states and 13804 transitions. [2023-04-02 23:55:56,606 INFO L78 Accepts]: Start accepts. Automaton has 9041 states and 13804 transitions. Word has length 136 [2023-04-02 23:55:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:56,607 INFO L495 AbstractCegarLoop]: Abstraction has 9041 states and 13804 transitions. [2023-04-02 23:55:56,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:56,608 INFO L276 IsEmpty]: Start isEmpty. Operand 9041 states and 13804 transitions. [2023-04-02 23:55:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 23:55:56,610 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:56,610 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:56,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 23:55:56,610 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:56,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1241105599, now seen corresponding path program 1 times [2023-04-02 23:55:56,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:56,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399868425] [2023-04-02 23:55:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:56,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:55:56,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:56,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399868425] [2023-04-02 23:55:56,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399868425] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:56,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:56,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:56,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12436656] [2023-04-02 23:55:56,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:56,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:56,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:56,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:56,695 INFO L87 Difference]: Start difference. First operand 9041 states and 13804 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:57,490 INFO L93 Difference]: Finished difference Result 26964 states and 42295 transitions. [2023-04-02 23:55:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:57,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 137 [2023-04-02 23:55:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:57,577 INFO L225 Difference]: With dead ends: 26964 [2023-04-02 23:55:57,577 INFO L226 Difference]: Without dead ends: 17986 [2023-04-02 23:55:57,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:57,615 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 542 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:57,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1156 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:57,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17986 states. [2023-04-02 23:55:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17986 to 17936. [2023-04-02 23:55:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17936 states, 12296 states have (on average 1.4891834743005856) internal successors, (18311), 13132 states have internal predecessors, (18311), 3873 states have call successors, (3873), 1515 states have call predecessors, (3873), 1766 states have return successors, (5904), 3594 states have call predecessors, (5904), 3850 states have call successors, (5904) [2023-04-02 23:55:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17936 states to 17936 states and 28088 transitions. [2023-04-02 23:55:58,567 INFO L78 Accepts]: Start accepts. Automaton has 17936 states and 28088 transitions. Word has length 137 [2023-04-02 23:55:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:58,567 INFO L495 AbstractCegarLoop]: Abstraction has 17936 states and 28088 transitions. [2023-04-02 23:55:58,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 17936 states and 28088 transitions. [2023-04-02 23:55:58,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 23:55:58,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:58,570 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:55:58,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 23:55:58,570 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:58,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash 179170111, now seen corresponding path program 1 times [2023-04-02 23:55:58,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:58,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905341309] [2023-04-02 23:55:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:58,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:55:58,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:58,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905341309] [2023-04-02 23:55:58,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905341309] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:58,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:58,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:58,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097709671] [2023-04-02 23:55:58,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:58,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:58,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:58,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:58,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:58,678 INFO L87 Difference]: Start difference. First operand 17936 states and 28088 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:59,662 INFO L93 Difference]: Finished difference Result 19099 states and 30079 transitions. [2023-04-02 23:55:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 138 [2023-04-02 23:55:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:59,750 INFO L225 Difference]: With dead ends: 19099 [2023-04-02 23:55:59,750 INFO L226 Difference]: Without dead ends: 19086 [2023-04-02 23:55:59,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:59,766 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 528 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:59,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1154 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19086 states. [2023-04-02 23:56:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19086 to 19037. [2023-04-02 23:56:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19037 states, 13053 states have (on average 1.4886233049873592) internal successors, (19431), 13941 states have internal predecessors, (19431), 4110 states have call successors, (4110), 1607 states have call predecessors, (4110), 1873 states have return successors, (6450), 3812 states have call predecessors, (6450), 4087 states have call successors, (6450) [2023-04-02 23:56:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19037 states to 19037 states and 29991 transitions. [2023-04-02 23:56:00,896 INFO L78 Accepts]: Start accepts. Automaton has 19037 states and 29991 transitions. Word has length 138 [2023-04-02 23:56:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:00,896 INFO L495 AbstractCegarLoop]: Abstraction has 19037 states and 29991 transitions. [2023-04-02 23:56:00,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:56:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 19037 states and 29991 transitions. [2023-04-02 23:56:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-04-02 23:56:00,904 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:00,905 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:00,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 23:56:00,905 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:00,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash 563186414, now seen corresponding path program 1 times [2023-04-02 23:56:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:00,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510388965] [2023-04-02 23:56:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-04-02 23:56:01,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510388965] [2023-04-02 23:56:01,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510388965] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292823096] [2023-04-02 23:56:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:01,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:01,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:01,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:56:01,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:56:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:01,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 3905 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:56:01,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2023-04-02 23:56:01,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:01,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292823096] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:01,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:01,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:56:01,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508452633] [2023-04-02 23:56:01,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:01,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:56:01,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:01,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:56:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:56:01,848 INFO L87 Difference]: Start difference. First operand 19037 states and 29991 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2023-04-02 23:56:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:02,961 INFO L93 Difference]: Finished difference Result 40020 states and 64882 transitions. [2023-04-02 23:56:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:56:02,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 295 [2023-04-02 23:56:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:03,078 INFO L225 Difference]: With dead ends: 40020 [2023-04-02 23:56:03,078 INFO L226 Difference]: Without dead ends: 21026 [2023-04-02 23:56:03,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:56:03,137 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 213 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:03,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1455 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:56:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21026 states. [2023-04-02 23:56:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21026 to 21026. [2023-04-02 23:56:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21026 states, 14991 states have (on average 1.5445267160296177) internal successors, (23154), 15879 states have internal predecessors, (23154), 4110 states have call successors, (4110), 1658 states have call predecessors, (4110), 1924 states have return successors, (6450), 3812 states have call predecessors, (6450), 4087 states have call successors, (6450) [2023-04-02 23:56:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21026 states to 21026 states and 33714 transitions. [2023-04-02 23:56:04,204 INFO L78 Accepts]: Start accepts. Automaton has 21026 states and 33714 transitions. Word has length 295 [2023-04-02 23:56:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:04,204 INFO L495 AbstractCegarLoop]: Abstraction has 21026 states and 33714 transitions. [2023-04-02 23:56:04,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2023-04-02 23:56:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 21026 states and 33714 transitions. [2023-04-02 23:56:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-04-02 23:56:04,210 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:04,210 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:04,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:56:04,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 23:56:04,421 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:04,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash 961367043, now seen corresponding path program 1 times [2023-04-02 23:56:04,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:04,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185349445] [2023-04-02 23:56:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:04,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-04-02 23:56:04,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185349445] [2023-04-02 23:56:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185349445] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615818263] [2023-04-02 23:56:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:04,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:04,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:56:04,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:56:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:05,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 3934 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:56:05,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-02 23:56:05,232 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:05,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615818263] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:05,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:05,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 23:56:05,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73977836] [2023-04-02 23:56:05,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:05,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:56:05,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:05,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:56:05,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:56:05,235 INFO L87 Difference]: Start difference. First operand 21026 states and 33714 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) [2023-04-02 23:56:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:06,008 INFO L93 Difference]: Finished difference Result 42184 states and 68248 transitions. [2023-04-02 23:56:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:56:06,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) Word has length 313 [2023-04-02 23:56:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:06,091 INFO L225 Difference]: With dead ends: 42184 [2023-04-02 23:56:06,092 INFO L226 Difference]: Without dead ends: 21221 [2023-04-02 23:56:06,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:56:06,145 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 8 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:06,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1109 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:56:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21221 states. [2023-04-02 23:56:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21221 to 21221. [2023-04-02 23:56:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21221 states, 15147 states have (on average 1.540701128936423) internal successors, (23337), 16083 states have internal predecessors, (23337), 4110 states have call successors, (4110), 1658 states have call predecessors, (4110), 1963 states have return successors, (5902), 3803 states have call predecessors, (5902), 4087 states have call successors, (5902) [2023-04-02 23:56:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21221 states to 21221 states and 33349 transitions. [2023-04-02 23:56:07,427 INFO L78 Accepts]: Start accepts. Automaton has 21221 states and 33349 transitions. Word has length 313 [2023-04-02 23:56:07,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:07,427 INFO L495 AbstractCegarLoop]: Abstraction has 21221 states and 33349 transitions. [2023-04-02 23:56:07,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) [2023-04-02 23:56:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 21221 states and 33349 transitions. [2023-04-02 23:56:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-04-02 23:56:07,506 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:07,506 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:07,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:56:07,706 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,SelfDestructingSolverStorable14 [2023-04-02 23:56:07,707 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:07,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1258741478, now seen corresponding path program 1 times [2023-04-02 23:56:07,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:07,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242964343] [2023-04-02 23:56:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:07,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-04-02 23:56:07,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:07,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242964343] [2023-04-02 23:56:07,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242964343] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:07,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020456269] [2023-04-02 23:56:07,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:07,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:07,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:07,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:56:07,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:56:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:08,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 3910 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:56:08,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2023-04-02 23:56:08,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:08,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020456269] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:08,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:08,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:56:08,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708771706] [2023-04-02 23:56:08,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:08,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:56:08,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:08,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:56:08,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:56:08,490 INFO L87 Difference]: Start difference. First operand 21221 states and 33349 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2023-04-02 23:56:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:09,428 INFO L93 Difference]: Finished difference Result 44388 states and 71205 transitions. [2023-04-02 23:56:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:56:09,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 302 [2023-04-02 23:56:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:09,509 INFO L225 Difference]: With dead ends: 44388 [2023-04-02 23:56:09,510 INFO L226 Difference]: Without dead ends: 23210 [2023-04-02 23:56:09,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:56:09,555 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 211 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:09,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1455 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:56:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23210 states. [2023-04-02 23:56:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23210 to 23210. [2023-04-02 23:56:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23210 states, 17085 states have (on average 1.5838454784899034) internal successors, (27060), 18021 states have internal predecessors, (27060), 4110 states have call successors, (4110), 1709 states have call predecessors, (4110), 2014 states have return successors, (5902), 3803 states have call predecessors, (5902), 4087 states have call successors, (5902) [2023-04-02 23:56:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23210 states to 23210 states and 37072 transitions. [2023-04-02 23:56:10,494 INFO L78 Accepts]: Start accepts. Automaton has 23210 states and 37072 transitions. Word has length 302 [2023-04-02 23:56:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:10,495 INFO L495 AbstractCegarLoop]: Abstraction has 23210 states and 37072 transitions. [2023-04-02 23:56:10,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2023-04-02 23:56:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 23210 states and 37072 transitions. [2023-04-02 23:56:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-04-02 23:56:10,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:10,502 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:10,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:56:10,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:10,711 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:10,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash 992849887, now seen corresponding path program 1 times [2023-04-02 23:56:10,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:10,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025827874] [2023-04-02 23:56:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:10,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 15 proven. 60 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2023-04-02 23:56:10,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:10,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025827874] [2023-04-02 23:56:10,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025827874] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:10,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790387023] [2023-04-02 23:56:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:10,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:10,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:10,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:56:10,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:56:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:11,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 3934 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:56:11,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-04-02 23:56:11,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:11,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790387023] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:11,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:11,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:56:11,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721508755] [2023-04-02 23:56:11,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:11,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:56:11,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:56:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:56:11,503 INFO L87 Difference]: Start difference. First operand 23210 states and 37072 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2023-04-02 23:56:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:12,410 INFO L93 Difference]: Finished difference Result 48366 states and 78600 transitions. [2023-04-02 23:56:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:56:12,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 317 [2023-04-02 23:56:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:12,504 INFO L225 Difference]: With dead ends: 48366 [2023-04-02 23:56:12,504 INFO L226 Difference]: Without dead ends: 25199 [2023-04-02 23:56:12,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:56:12,560 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 209 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:12,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1455 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:56:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25199 states. [2023-04-02 23:56:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25199 to 25199. [2023-04-02 23:56:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25199 states, 19023 states have (on average 1.6181990222362403) internal successors, (30783), 19959 states have internal predecessors, (30783), 4110 states have call successors, (4110), 1760 states have call predecessors, (4110), 2065 states have return successors, (5902), 3803 states have call predecessors, (5902), 4087 states have call successors, (5902) [2023-04-02 23:56:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25199 states to 25199 states and 40795 transitions. [2023-04-02 23:56:13,394 INFO L78 Accepts]: Start accepts. Automaton has 25199 states and 40795 transitions. Word has length 317 [2023-04-02 23:56:13,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:13,395 INFO L495 AbstractCegarLoop]: Abstraction has 25199 states and 40795 transitions. [2023-04-02 23:56:13,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2023-04-02 23:56:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 25199 states and 40795 transitions. [2023-04-02 23:56:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-02 23:56:13,400 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:13,400 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:13,410 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 23:56:13,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 23:56:13,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:13,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1513836028, now seen corresponding path program 1 times [2023-04-02 23:56:13,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:13,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728884864] [2023-04-02 23:56:13,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:13,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 22 proven. 55 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2023-04-02 23:56:13,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:13,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728884864] [2023-04-02 23:56:13,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728884864] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:13,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367711119] [2023-04-02 23:56:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:13,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:13,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:13,839 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:56:13,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:56:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:14,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 3924 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:56:14,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-02 23:56:14,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:14,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367711119] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:14,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:14,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:56:14,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927247250] [2023-04-02 23:56:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:14,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:56:14,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:56:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:56:14,434 INFO L87 Difference]: Start difference. First operand 25199 states and 40795 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2023-04-02 23:56:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:15,495 INFO L93 Difference]: Finished difference Result 52344 states and 85995 transitions. [2023-04-02 23:56:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:56:15,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 316 [2023-04-02 23:56:15,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:15,591 INFO L225 Difference]: With dead ends: 52344 [2023-04-02 23:56:15,592 INFO L226 Difference]: Without dead ends: 27188 [2023-04-02 23:56:15,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:56:15,641 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 207 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:15,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1455 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:56:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27188 states. [2023-04-02 23:56:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27188 to 27188. [2023-04-02 23:56:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27188 states, 20961 states have (on average 1.6462000858737655) internal successors, (34506), 21897 states have internal predecessors, (34506), 4110 states have call successors, (4110), 1811 states have call predecessors, (4110), 2116 states have return successors, (5902), 3803 states have call predecessors, (5902), 4087 states have call successors, (5902) [2023-04-02 23:56:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27188 states to 27188 states and 44518 transitions. [2023-04-02 23:56:16,630 INFO L78 Accepts]: Start accepts. Automaton has 27188 states and 44518 transitions. Word has length 316 [2023-04-02 23:56:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:16,630 INFO L495 AbstractCegarLoop]: Abstraction has 27188 states and 44518 transitions. [2023-04-02 23:56:16,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2023-04-02 23:56:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 27188 states and 44518 transitions. [2023-04-02 23:56:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2023-04-02 23:56:16,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:16,636 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:16,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 23:56:16,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 23:56:16,849 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:16,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1458124538, now seen corresponding path program 1 times [2023-04-02 23:56:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:16,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318124689] [2023-04-02 23:56:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:16,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-04-02 23:56:17,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:17,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318124689] [2023-04-02 23:56:17,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318124689] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:17,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231220892] [2023-04-02 23:56:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:17,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:17,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:17,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:56:17,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:56:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:17,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 3933 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:56:17,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2023-04-02 23:56:18,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:18,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231220892] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:18,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:18,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-04-02 23:56:18,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107347222] [2023-04-02 23:56:18,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:18,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:56:18,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:56:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:56:18,059 INFO L87 Difference]: Start difference. First operand 27188 states and 44518 transitions. Second operand has 9 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (47), 4 states have call predecessors, (47), 6 states have return successors, (45), 7 states have call predecessors, (45), 4 states have call successors, (45) [2023-04-02 23:56:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:22,091 INFO L93 Difference]: Finished difference Result 67128 states and 111427 transitions. [2023-04-02 23:56:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 23:56:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (47), 4 states have call predecessors, (47), 6 states have return successors, (45), 7 states have call predecessors, (45), 4 states have call successors, (45) Word has length 328 [2023-04-02 23:56:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:22,223 INFO L225 Difference]: With dead ends: 67128 [2023-04-02 23:56:22,223 INFO L226 Difference]: Without dead ends: 39989 [2023-04-02 23:56:22,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:56:22,284 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 1398 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 6047 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 6535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 6047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:22,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1545 Valid, 779 Invalid, 6535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 6047 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 23:56:22,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39989 states. [2023-04-02 23:56:23,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39989 to 38758. [2023-04-02 23:56:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38758 states, 29932 states have (on average 1.6249164773486569) internal successors, (48637), 31187 states have internal predecessors, (48637), 5729 states have call successors, (5729), 2651 states have call predecessors, (5729), 3096 states have return successors, (8764), 5375 states have call predecessors, (8764), 5706 states have call successors, (8764) [2023-04-02 23:56:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38758 states to 38758 states and 63130 transitions. [2023-04-02 23:56:23,897 INFO L78 Accepts]: Start accepts. Automaton has 38758 states and 63130 transitions. Word has length 328 [2023-04-02 23:56:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:23,898 INFO L495 AbstractCegarLoop]: Abstraction has 38758 states and 63130 transitions. [2023-04-02 23:56:23,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (47), 4 states have call predecessors, (47), 6 states have return successors, (45), 7 states have call predecessors, (45), 4 states have call successors, (45) [2023-04-02 23:56:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 38758 states and 63130 transitions. [2023-04-02 23:56:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-02 23:56:23,904 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:23,904 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:23,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 23:56:24,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:24,115 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:24,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:24,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1532413909, now seen corresponding path program 1 times [2023-04-02 23:56:24,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:24,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274482428] [2023-04-02 23:56:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:24,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-04-02 23:56:24,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274482428] [2023-04-02 23:56:24,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274482428] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387158282] [2023-04-02 23:56:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:24,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:24,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:24,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:56:24,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 23:56:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:25,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 3927 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 23:56:25,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-02 23:56:25,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:25,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387158282] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:25,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:25,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-04-02 23:56:25,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239358381] [2023-04-02 23:56:25,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:25,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:56:25,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:25,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:56:25,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-04-02 23:56:25,264 INFO L87 Difference]: Start difference. First operand 38758 states and 63130 transitions. Second operand has 6 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 3 states have call successors, (58), 3 states have call predecessors, (58), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2023-04-02 23:56:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:27,329 INFO L93 Difference]: Finished difference Result 82159 states and 133677 transitions. [2023-04-02 23:56:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:56:27,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 3 states have call successors, (58), 3 states have call predecessors, (58), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) Word has length 324 [2023-04-02 23:56:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:27,464 INFO L225 Difference]: With dead ends: 82159 [2023-04-02 23:56:27,464 INFO L226 Difference]: Without dead ends: 43448 [2023-04-02 23:56:27,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-04-02 23:56:27,663 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 323 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:27,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 2317 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:56:27,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43448 states. [2023-04-02 23:56:29,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43448 to 41488. [2023-04-02 23:56:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41488 states, 31793 states have (on average 1.6059195420375554) internal successors, (51057), 33132 states have internal predecessors, (51057), 6191 states have call successors, (6191), 3004 states have call predecessors, (6191), 3503 states have return successors, (9697), 5807 states have call predecessors, (9697), 6168 states have call successors, (9697) [2023-04-02 23:56:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41488 states to 41488 states and 66945 transitions. [2023-04-02 23:56:29,404 INFO L78 Accepts]: Start accepts. Automaton has 41488 states and 66945 transitions. Word has length 324 [2023-04-02 23:56:29,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:29,405 INFO L495 AbstractCegarLoop]: Abstraction has 41488 states and 66945 transitions. [2023-04-02 23:56:29,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 3 states have call successors, (58), 3 states have call predecessors, (58), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2023-04-02 23:56:29,405 INFO L276 IsEmpty]: Start isEmpty. Operand 41488 states and 66945 transitions. [2023-04-02 23:56:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2023-04-02 23:56:29,411 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:29,411 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:56:29,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 23:56:29,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:29,612 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:29,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:29,612 INFO L85 PathProgramCache]: Analyzing trace with hash -153806678, now seen corresponding path program 1 times [2023-04-02 23:56:29,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:29,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731819942] [2023-04-02 23:56:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:29,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-04-02 23:56:30,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731819942] [2023-04-02 23:56:30,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731819942] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200075590] [2023-04-02 23:56:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:30,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:30,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:56:30,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 23:56:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:30,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 3920 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:56:30,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-04-02 23:56:30,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:56:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-04-02 23:56:31,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200075590] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:56:31,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537835903] [2023-04-02 23:56:31,624 INFO L159 IcfgInterpreter]: Started Sifa with 184 locations of interest [2023-04-02 23:56:31,624 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:56:31,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:56:31,630 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:56:31,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:56:33,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 184 for LOIs [2023-04-02 23:56:33,894 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 239 for LOIs [2023-04-02 23:56:36,315 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 239 for LOIs [2023-04-02 23:56:39,881 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 123071 conjuctions. This might take some time...