/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_spec3_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:53:32,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:53:32,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:53:32,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:53:32,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:53:32,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:53:32,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:53:32,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:53:32,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:53:32,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:53:32,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:53:32,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:53:32,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:53:32,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:53:32,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:53:32,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:53:32,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:53:32,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:53:32,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:53:32,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:53:32,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:53:32,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:53:32,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:53:32,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:53:32,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:53:32,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:53:32,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:53:32,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:53:32,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:53:32,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:53:32,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:53:32,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:53:32,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:53:32,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:53:32,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:53:32,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:53:32,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:53:32,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:53:32,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:53:32,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:53:32,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:53:32,541 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 23:53:32,563 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:53:32,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:53:32,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:53:32,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:53:32,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:53:32,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:53:32,564 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:53:32,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:53:32,564 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:53:32,564 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:53:32,564 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:53:32,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:53:32,564 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:53:32,564 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:53:32,564 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:53:32,566 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:53:32,566 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:53:32,566 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:53:32,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:53:32,567 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:53:32,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:53:32,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:53:32,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:53:32,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:53:32,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:53:32,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:53:32,568 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:53:32,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:53:32,568 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:53:32,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:53:32,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:53:32,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:53:32,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:53:32,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:53:32,569 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:53:32,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:53:32,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:53:32,570 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:53:32,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:53:32,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:53:32,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:53:32,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:53:32,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:53:32,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:53:32,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:53:32,751 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:53:32,752 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:53:32,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2023-04-02 23:53:33,778 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:53:34,018 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:53:34,018 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2023-04-02 23:53:34,032 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af99f91c/8e1f990d4b04427eacbd49575a8dbb10/FLAGee534beeb [2023-04-02 23:53:34,042 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af99f91c/8e1f990d4b04427eacbd49575a8dbb10 [2023-04-02 23:53:34,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:53:34,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:53:34,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:53:34,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:53:34,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:53:34,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad37a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34, skipping insertion in model container [2023-04-02 23:53:34,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:53:34,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:53:34,414 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_spec3_product29.cil.c[40506,40519] [2023-04-02 23:53:34,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:53:34,527 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:53:34,575 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_spec3_product29.cil.c[40506,40519] [2023-04-02 23:53:34,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:53:34,617 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:53:34,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34 WrapperNode [2023-04-02 23:53:34,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:53:34,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:53:34,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:53:34,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:53:34,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,705 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:53:34,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:53:34,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:53:34,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:53:34,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34" (1/1) ... [2023-04-02 23:53:34,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:53:34,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:34,743 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 23:53:34,755 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 23:53:34,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:53:34,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:53:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:53:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:53:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:53:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:53:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:53:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:53:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:53:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:53:34,790 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:53:34,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:53:34,790 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:53:34,790 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:53:34,790 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:53:34,790 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:53:34,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:53:34,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:53:34,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:53:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:53:34,792 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:53:34,793 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:53:34,794 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:53:34,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:53:34,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:53:34,794 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:53:34,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:53:34,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:53:34,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:53:34,796 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:53:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:53:34,798 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:53:34,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:53:34,991 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:53:34,993 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:53:36,094 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:53:36,652 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:53:36,653 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:53:36,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:53:36 BoogieIcfgContainer [2023-04-02 23:53:36,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:53:36,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:53:36,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:53:36,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:53:36,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:53:34" (1/3) ... [2023-04-02 23:53:36,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485ed692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:53:36, skipping insertion in model container [2023-04-02 23:53:36,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:53:34" (2/3) ... [2023-04-02 23:53:36,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485ed692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:53:36, skipping insertion in model container [2023-04-02 23:53:36,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:53:36" (3/3) ... [2023-04-02 23:53:36,661 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2023-04-02 23:53:36,674 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:53:36,674 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:53:36,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:53:36,723 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;@66626846, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:53:36,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:53:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 598 states, 349 states have (on average 1.478510028653295) internal successors, (516), 372 states have internal predecessors, (516), 183 states have call successors, (183), 52 states have call predecessors, (183), 52 states have return successors, (183), 177 states have call predecessors, (183), 183 states have call successors, (183) [2023-04-02 23:53:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:53:36,746 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:36,747 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] [2023-04-02 23:53:36,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:36,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1443566096, now seen corresponding path program 1 times [2023-04-02 23:53:36,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:36,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116769312] [2023-04-02 23:53:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:36,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 23:53:37,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:37,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116769312] [2023-04-02 23:53:37,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116769312] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:37,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234285764] [2023-04-02 23:53:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:37,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:37,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:37,745 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 23:53:37,765 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 23:53:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:38,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 2684 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:53:38,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:53:38,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:53:38,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234285764] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:53:38,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:53:38,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-02 23:53:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713542999] [2023-04-02 23:53:38,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:53:38,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:38,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:53:38,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:53:38,407 INFO L87 Difference]: Start difference. First operand has 598 states, 349 states have (on average 1.478510028653295) internal successors, (516), 372 states have internal predecessors, (516), 183 states have call successors, (183), 52 states have call predecessors, (183), 52 states have return successors, (183), 177 states have call predecessors, (183), 183 states have call successors, (183) Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:53:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:38,635 INFO L93 Difference]: Finished difference Result 1316 states and 2001 transitions. [2023-04-02 23:53:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:53:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 112 [2023-04-02 23:53:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:38,667 INFO L225 Difference]: With dead ends: 1316 [2023-04-02 23:53:38,667 INFO L226 Difference]: Without dead ends: 850 [2023-04-02 23:53:38,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:53:38,678 INFO L413 NwaCegarLoop]: 1178 mSDtfsCounter, 632 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:38,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 1737 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:53:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2023-04-02 23:53:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 837. [2023-04-02 23:53:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 532 states have (on average 1.518796992481203) internal successors, (808), 563 states have internal predecessors, (808), 223 states have call successors, (223), 83 states have call predecessors, (223), 81 states have return successors, (225), 214 states have call predecessors, (225), 217 states have call successors, (225) [2023-04-02 23:53:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1256 transitions. [2023-04-02 23:53:38,779 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1256 transitions. Word has length 112 [2023-04-02 23:53:38,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:38,780 INFO L495 AbstractCegarLoop]: Abstraction has 837 states and 1256 transitions. [2023-04-02 23:53:38,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:53:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1256 transitions. [2023-04-02 23:53:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-02 23:53:38,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:38,788 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] [2023-04-02 23:53:38,810 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 23:53:38,997 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,SelfDestructingSolverStorable0 [2023-04-02 23:53:38,998 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:39,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:39,005 INFO L85 PathProgramCache]: Analyzing trace with hash 911317465, now seen corresponding path program 1 times [2023-04-02 23:53:39,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:39,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192012020] [2023-04-02 23:53:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:39,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 23:53:39,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:39,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192012020] [2023-04-02 23:53:39,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192012020] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160050163] [2023-04-02 23:53:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:39,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:39,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:39,470 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 23:53:39,472 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 23:53:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:39,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 2696 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 23:53:39,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:53:40,005 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:53:40,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160050163] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:53:40,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:53:40,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-02 23:53:40,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037130289] [2023-04-02 23:53:40,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:40,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:53:40,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:53:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:53:40,008 INFO L87 Difference]: Start difference. First operand 837 states and 1256 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 23:53:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:40,207 INFO L93 Difference]: Finished difference Result 2371 states and 3620 transitions. [2023-04-02 23:53:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:53:40,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 113 [2023-04-02 23:53:40,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:40,218 INFO L225 Difference]: With dead ends: 2371 [2023-04-02 23:53:40,219 INFO L226 Difference]: Without dead ends: 1565 [2023-04-02 23:53:40,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 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 23:53:40,224 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 537 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:40,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1292 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:53:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2023-04-02 23:53:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1540. [2023-04-02 23:53:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 978 states have (on average 1.478527607361963) internal successors, (1446), 1038 states have internal predecessors, (1446), 413 states have call successors, (413), 150 states have call predecessors, (413), 148 states have return successors, (441), 399 states have call predecessors, (441), 406 states have call successors, (441) [2023-04-02 23:53:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2300 transitions. [2023-04-02 23:53:40,300 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2300 transitions. Word has length 113 [2023-04-02 23:53:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:40,301 INFO L495 AbstractCegarLoop]: Abstraction has 1540 states and 2300 transitions. [2023-04-02 23:53:40,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 23:53:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2300 transitions. [2023-04-02 23:53:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-02 23:53:40,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:40,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:53:40,326 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 23:53:40,514 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,SelfDestructingSolverStorable1 [2023-04-02 23:53:40,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:40,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash 114753784, now seen corresponding path program 1 times [2023-04-02 23:53:40,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:40,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864318136] [2023-04-02 23:53:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:40,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 23:53:40,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:40,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864318136] [2023-04-02 23:53:40,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864318136] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:40,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366994402] [2023-04-02 23:53:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:40,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:40,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:40,888 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 23:53:40,913 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 23:53:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:41,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 23:53:41,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:53:41,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:53:41,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366994402] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:53:41,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:53:41,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-04-02 23:53:41,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823299246] [2023-04-02 23:53:41,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:53:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:41,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:53:41,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:53:41,503 INFO L87 Difference]: Start difference. First operand 1540 states and 2300 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-04-02 23:53:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:42,231 INFO L93 Difference]: Finished difference Result 2691 states and 4020 transitions. [2023-04-02 23:53:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:53:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) Word has length 118 [2023-04-02 23:53:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:42,241 INFO L225 Difference]: With dead ends: 2691 [2023-04-02 23:53:42,241 INFO L226 Difference]: Without dead ends: 1738 [2023-04-02 23:53:42,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-04-02 23:53:42,245 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 524 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:42,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 3501 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 23:53:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2023-04-02 23:53:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1724. [2023-04-02 23:53:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1120 states have (on average 1.4625) internal successors, (1638), 1178 states have internal predecessors, (1638), 439 states have call successors, (439), 162 states have call predecessors, (439), 164 states have return successors, (475), 431 states have call predecessors, (475), 432 states have call successors, (475) [2023-04-02 23:53:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2552 transitions. [2023-04-02 23:53:42,294 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2552 transitions. Word has length 118 [2023-04-02 23:53:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:42,295 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 2552 transitions. [2023-04-02 23:53:42,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-04-02 23:53:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2552 transitions. [2023-04-02 23:53:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-02 23:53:42,297 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:42,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:53:42,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 23:53:42,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:42,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:42,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:42,508 INFO L85 PathProgramCache]: Analyzing trace with hash -409457754, now seen corresponding path program 1 times [2023-04-02 23:53:42,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:42,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999407565] [2023-04-02 23:53:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:42,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 23:53:42,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:42,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999407565] [2023-04-02 23:53:42,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999407565] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:42,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565266351] [2023-04-02 23:53:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:42,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:42,953 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 23:53:42,997 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 23:53:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:43,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:53:43,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:53:43,431 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:53:43,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565266351] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:53:43,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:53:43,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-04-02 23:53:43,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743426095] [2023-04-02 23:53:43,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:43,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:53:43,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:43,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:53:43,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-04-02 23:53:43,433 INFO L87 Difference]: Start difference. First operand 1724 states and 2552 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 23:53:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:43,707 INFO L93 Difference]: Finished difference Result 3261 states and 4903 transitions. [2023-04-02 23:53:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:53:43,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 118 [2023-04-02 23:53:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:43,722 INFO L225 Difference]: With dead ends: 3261 [2023-04-02 23:53:43,722 INFO L226 Difference]: Without dead ends: 2100 [2023-04-02 23:53:43,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-04-02 23:53:43,729 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 310 mSDsluCounter, 2517 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 3217 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:43,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 3217 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:53:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2023-04-02 23:53:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2100. [2023-04-02 23:53:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 1446 states have (on average 1.4868603042876902) internal successors, (2150), 1506 states have internal predecessors, (2150), 481 states have call successors, (481), 168 states have call predecessors, (481), 172 states have return successors, (517), 473 states have call predecessors, (517), 474 states have call successors, (517) [2023-04-02 23:53:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 3148 transitions. [2023-04-02 23:53:43,837 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 3148 transitions. Word has length 118 [2023-04-02 23:53:43,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:43,839 INFO L495 AbstractCegarLoop]: Abstraction has 2100 states and 3148 transitions. [2023-04-02 23:53:43,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 23:53:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 3148 transitions. [2023-04-02 23:53:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-02 23:53:43,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:43,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:53:43,852 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 23:53:44,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:44,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:44,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:44,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2022037041, now seen corresponding path program 1 times [2023-04-02 23:53:44,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:44,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013682261] [2023-04-02 23:53:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:44,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 23:53:44,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:44,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013682261] [2023-04-02 23:53:44,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013682261] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:44,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693668757] [2023-04-02 23:53:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:44,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:44,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:44,471 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 23:53:44,472 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 23:53:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:44,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 2712 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:53:44,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:53:45,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:53:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 23:53:45,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693668757] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:45,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:53:45,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 17 [2023-04-02 23:53:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880271251] [2023-04-02 23:53:45,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:45,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:53:45,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:53:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-04-02 23:53:45,298 INFO L87 Difference]: Start difference. First operand 2100 states and 3148 transitions. Second operand has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 4 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-02 23:53:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:48,001 INFO L93 Difference]: Finished difference Result 5086 states and 7988 transitions. [2023-04-02 23:53:48,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 23:53:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 4 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 121 [2023-04-02 23:53:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:48,020 INFO L225 Difference]: With dead ends: 5086 [2023-04-02 23:53:48,020 INFO L226 Difference]: Without dead ends: 3874 [2023-04-02 23:53:48,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2023-04-02 23:53:48,029 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 3382 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 1577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 4167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1577 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:48,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 2433 Invalid, 4167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1577 Valid, 2590 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-02 23:53:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3874 states. [2023-04-02 23:53:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3874 to 3807. [2023-04-02 23:53:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 2706 states have (on average 1.5107169253510717) internal successors, (4088), 2802 states have internal predecessors, (4088), 804 states have call successors, (804), 281 states have call predecessors, (804), 296 states have return successors, (979), 795 states have call predecessors, (979), 796 states have call successors, (979) [2023-04-02 23:53:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 5871 transitions. [2023-04-02 23:53:48,197 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 5871 transitions. Word has length 121 [2023-04-02 23:53:48,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:48,198 INFO L495 AbstractCegarLoop]: Abstraction has 3807 states and 5871 transitions. [2023-04-02 23:53:48,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 4 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-02 23:53:48,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 5871 transitions. [2023-04-02 23:53:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-02 23:53:48,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:48,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:53:48,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:53:48,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:48,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:48,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1935427818, now seen corresponding path program 1 times [2023-04-02 23:53:48,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:48,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251605808] [2023-04-02 23:53:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:48,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 23:53:48,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:48,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251605808] [2023-04-02 23:53:48,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251605808] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:48,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331621833] [2023-04-02 23:53:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:48,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:48,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:48,746 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 23:53:48,748 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 23:53:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:49,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:53:49,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:53:49,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:53:49,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331621833] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:53:49,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:53:49,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-02 23:53:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515789764] [2023-04-02 23:53:49,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:49,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:53:49,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:49,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:53:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:53:49,239 INFO L87 Difference]: Start difference. First operand 3807 states and 5871 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 23:53:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:49,515 INFO L93 Difference]: Finished difference Result 9407 states and 14692 transitions. [2023-04-02 23:53:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:53:49,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 121 [2023-04-02 23:53:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:49,550 INFO L225 Difference]: With dead ends: 9407 [2023-04-02 23:53:49,550 INFO L226 Difference]: Without dead ends: 5631 [2023-04-02 23:53:49,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:53:49,569 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 613 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:49,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 1198 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:53:49,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2023-04-02 23:53:49,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 5542. [2023-04-02 23:53:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5542 states, 3959 states have (on average 1.511745390250063) internal successors, (5985), 4099 states have internal predecessors, (5985), 1156 states have call successors, (1156), 403 states have call predecessors, (1156), 426 states have return successors, (1414), 1147 states have call predecessors, (1414), 1148 states have call successors, (1414) [2023-04-02 23:53:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5542 states to 5542 states and 8555 transitions. [2023-04-02 23:53:49,947 INFO L78 Accepts]: Start accepts. Automaton has 5542 states and 8555 transitions. Word has length 121 [2023-04-02 23:53:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:49,948 INFO L495 AbstractCegarLoop]: Abstraction has 5542 states and 8555 transitions. [2023-04-02 23:53:49,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 23:53:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5542 states and 8555 transitions. [2023-04-02 23:53:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-02 23:53:49,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:49,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:53:49,977 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 23:53:50,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:50,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:50,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:50,163 INFO L85 PathProgramCache]: Analyzing trace with hash 18495753, now seen corresponding path program 1 times [2023-04-02 23:53:50,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:50,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567359621] [2023-04-02 23:53:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:50,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 23:53:50,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:50,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567359621] [2023-04-02 23:53:50,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567359621] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:50,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792857627] [2023-04-02 23:53:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:50,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:50,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:50,489 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 23:53:50,493 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 23:53:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:50,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 23:53:50,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:53:51,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:53:51,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792857627] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:53:51,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:53:51,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2023-04-02 23:53:51,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258269895] [2023-04-02 23:53:51,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:51,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:53:51,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:51,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:53:51,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-04-02 23:53:51,009 INFO L87 Difference]: Start difference. First operand 5542 states and 8555 transitions. Second operand has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-02 23:53:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:51,926 INFO L93 Difference]: Finished difference Result 10664 states and 16534 transitions. [2023-04-02 23:53:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:53:51,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 121 [2023-04-02 23:53:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:51,954 INFO L225 Difference]: With dead ends: 10664 [2023-04-02 23:53:51,954 INFO L226 Difference]: Without dead ends: 5153 [2023-04-02 23:53:51,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-04-02 23:53:51,979 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 514 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:51,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 2283 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 23:53:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5153 states. [2023-04-02 23:53:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5153 to 5144. [2023-04-02 23:53:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 3689 states have (on average 1.5153158037408512) internal successors, (5590), 3816 states have internal predecessors, (5590), 1063 states have call successors, (1063), 373 states have call predecessors, (1063), 391 states have return successors, (1301), 1050 states have call predecessors, (1301), 1055 states have call successors, (1301) [2023-04-02 23:53:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 7954 transitions. [2023-04-02 23:53:52,217 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 7954 transitions. Word has length 121 [2023-04-02 23:53:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:52,218 INFO L495 AbstractCegarLoop]: Abstraction has 5144 states and 7954 transitions. [2023-04-02 23:53:52,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-02 23:53:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 7954 transitions. [2023-04-02 23:53:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-02 23:53:52,221 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:52,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:53:52,246 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 23:53:52,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:52,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:52,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1066678476, now seen corresponding path program 1 times [2023-04-02 23:53:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:52,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142992722] [2023-04-02 23:53:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:52,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 23:53:52,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142992722] [2023-04-02 23:53:52,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142992722] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91146412] [2023-04-02 23:53:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:52,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:52,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:52,833 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 23:53:52,874 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 23:53:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:53,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 2728 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 23:53:53,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:53:53,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:53:53,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91146412] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:53:53,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:53:53,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-02 23:53:53,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927214621] [2023-04-02 23:53:53,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:53,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:53:53,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:53:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:53:53,374 INFO L87 Difference]: Start difference. First operand 5144 states and 7954 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-02 23:53:53,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:53,905 INFO L93 Difference]: Finished difference Result 9438 states and 14691 transitions. [2023-04-02 23:53:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:53:53,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 124 [2023-04-02 23:53:53,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:53,938 INFO L225 Difference]: With dead ends: 9438 [2023-04-02 23:53:53,938 INFO L226 Difference]: Without dead ends: 5165 [2023-04-02 23:53:53,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:53:53,957 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 471 mSDsluCounter, 1934 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 2687 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:53,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 2687 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:53:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2023-04-02 23:53:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5148. [2023-04-02 23:53:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5148 states, 3689 states have (on average 1.5153158037408512) internal successors, (5590), 3820 states have internal predecessors, (5590), 1067 states have call successors, (1067), 373 states have call predecessors, (1067), 391 states have return successors, (1305), 1050 states have call predecessors, (1305), 1059 states have call successors, (1305) [2023-04-02 23:53:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5148 states to 5148 states and 7962 transitions. [2023-04-02 23:53:54,226 INFO L78 Accepts]: Start accepts. Automaton has 5148 states and 7962 transitions. Word has length 124 [2023-04-02 23:53:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:54,226 INFO L495 AbstractCegarLoop]: Abstraction has 5148 states and 7962 transitions. [2023-04-02 23:53:54,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-02 23:53:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 5148 states and 7962 transitions. [2023-04-02 23:53:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-02 23:53:54,230 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:54,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:53:54,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-02 23:53:54,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 23:53:54,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:54,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:54,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2064296712, now seen corresponding path program 1 times [2023-04-02 23:53:54,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:54,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104410927] [2023-04-02 23:53:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:54,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 23:53:54,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:54,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104410927] [2023-04-02 23:53:54,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104410927] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:54,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321966513] [2023-04-02 23:53:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:54,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:54,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:54,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:53:54,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 23:53:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:55,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 23:53:55,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:53:55,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:53:55,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321966513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:53:55,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:53:55,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-04-02 23:53:55,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842809100] [2023-04-02 23:53:55,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:55,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:53:55,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:55,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:53:55,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:53:55,223 INFO L87 Difference]: Start difference. First operand 5148 states and 7962 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2023-04-02 23:53:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:55,634 INFO L93 Difference]: Finished difference Result 9929 states and 15599 transitions. [2023-04-02 23:53:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:53:55,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) Word has length 155 [2023-04-02 23:53:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:55,659 INFO L225 Difference]: With dead ends: 9929 [2023-04-02 23:53:55,659 INFO L226 Difference]: Without dead ends: 5357 [2023-04-02 23:53:55,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:53:55,679 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 2 mSDsluCounter, 3302 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3970 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:55,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3970 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:53:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5357 states. [2023-04-02 23:53:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5357 to 5282. [2023-04-02 23:53:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 3773 states have (on average 1.5038430956798303) internal successors, (5674), 3919 states have internal predecessors, (5674), 1075 states have call successors, (1075), 373 states have call predecessors, (1075), 433 states have return successors, (1493), 1085 states have call predecessors, (1493), 1067 states have call successors, (1493) [2023-04-02 23:53:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 8242 transitions. [2023-04-02 23:53:55,937 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 8242 transitions. Word has length 155 [2023-04-02 23:53:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:55,938 INFO L495 AbstractCegarLoop]: Abstraction has 5282 states and 8242 transitions. [2023-04-02 23:53:55,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2023-04-02 23:53:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 8242 transitions. [2023-04-02 23:53:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-02 23:53:55,941 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:55,941 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:53:55,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 23:53:56,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:56,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:56,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash -171468888, now seen corresponding path program 1 times [2023-04-02 23:53:56,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:56,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898191855] [2023-04-02 23:53:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:56,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 23:53:56,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:56,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898191855] [2023-04-02 23:53:56,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898191855] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:56,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399314624] [2023-04-02 23:53:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:56,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:56,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:56,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:53:56,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 23:53:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:56,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 23:53:56,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:53:56,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:53:56,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399314624] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:53:56,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:53:56,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-04-02 23:53:56,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143477656] [2023-04-02 23:53:56,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:56,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:53:56,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:53:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:53:56,946 INFO L87 Difference]: Start difference. First operand 5282 states and 8242 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2023-04-02 23:53:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:57,288 INFO L93 Difference]: Finished difference Result 10153 states and 16045 transitions. [2023-04-02 23:53:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:53:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) Word has length 154 [2023-04-02 23:53:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:57,311 INFO L225 Difference]: With dead ends: 10153 [2023-04-02 23:53:57,311 INFO L226 Difference]: Without dead ends: 5451 [2023-04-02 23:53:57,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:53:57,328 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 2 mSDsluCounter, 3276 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3938 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:57,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3938 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:53:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2023-04-02 23:53:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 5302. [2023-04-02 23:53:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5302 states, 3793 states have (on average 1.501186395992618) internal successors, (5694), 3919 states have internal predecessors, (5694), 1075 states have call successors, (1075), 373 states have call predecessors, (1075), 433 states have return successors, (1493), 1105 states have call predecessors, (1493), 1067 states have call successors, (1493) [2023-04-02 23:53:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5302 states to 5302 states and 8262 transitions. [2023-04-02 23:53:57,513 INFO L78 Accepts]: Start accepts. Automaton has 5302 states and 8262 transitions. Word has length 154 [2023-04-02 23:53:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:57,514 INFO L495 AbstractCegarLoop]: Abstraction has 5302 states and 8262 transitions. [2023-04-02 23:53:57,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2023-04-02 23:53:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5302 states and 8262 transitions. [2023-04-02 23:53:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-02 23:53:57,520 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:57,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:53:57,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 23:53:57,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 23:53:57,729 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:57,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash 324680575, now seen corresponding path program 1 times [2023-04-02 23:53:57,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627922351] [2023-04-02 23:53:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:57,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 23:53:58,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:58,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627922351] [2023-04-02 23:53:58,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627922351] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:58,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128809840] [2023-04-02 23:53:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:58,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:58,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:58,046 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:53:58,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 23:53:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:58,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 2833 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 23:53:58,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:53:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:53:58,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:53:58,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128809840] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:53:58,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:53:58,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-04-02 23:53:58,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146217134] [2023-04-02 23:53:58,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:53:58,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:53:58,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:53:58,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:53:58,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:53:58,545 INFO L87 Difference]: Start difference. First operand 5302 states and 8262 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:53:58,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:53:58,867 INFO L93 Difference]: Finished difference Result 10193 states and 16085 transitions. [2023-04-02 23:53:58,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:53:58,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) Word has length 153 [2023-04-02 23:53:58,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:53:58,890 INFO L225 Difference]: With dead ends: 10193 [2023-04-02 23:53:58,890 INFO L226 Difference]: Without dead ends: 5471 [2023-04-02 23:53:58,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:53:58,908 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 2 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3973 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:53:58,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3973 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:53:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2023-04-02 23:53:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5362. [2023-04-02 23:53:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5362 states, 3833 states have (on average 1.495956170101748) internal successors, (5734), 3959 states have internal predecessors, (5734), 1075 states have call successors, (1075), 373 states have call predecessors, (1075), 453 states have return successors, (1537), 1125 states have call predecessors, (1537), 1067 states have call successors, (1537) [2023-04-02 23:53:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5362 states to 5362 states and 8346 transitions. [2023-04-02 23:53:59,098 INFO L78 Accepts]: Start accepts. Automaton has 5362 states and 8346 transitions. Word has length 153 [2023-04-02 23:53:59,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:53:59,099 INFO L495 AbstractCegarLoop]: Abstraction has 5362 states and 8346 transitions. [2023-04-02 23:53:59,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:53:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5362 states and 8346 transitions. [2023-04-02 23:53:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-02 23:53:59,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:53:59,102 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:53:59,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 23:53:59,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 23:53:59,311 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:53:59,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:53:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1090363746, now seen corresponding path program 1 times [2023-04-02 23:53:59,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:53:59,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300036903] [2023-04-02 23:53:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:59,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:53:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:53:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 23:53:59,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:53:59,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300036903] [2023-04-02 23:53:59,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300036903] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:53:59,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794549350] [2023-04-02 23:53:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:53:59,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:53:59,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:53:59,651 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:53:59,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 23:54:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:54:00,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 2848 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:54:00,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:54:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:54:00,139 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:54:00,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794549350] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:54:00,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:54:00,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-04-02 23:54:00,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651869670] [2023-04-02 23:54:00,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:54:00,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:54:00,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:54:00,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:54:00,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-04-02 23:54:00,140 INFO L87 Difference]: Start difference. First operand 5362 states and 8346 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:54:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:54:00,577 INFO L93 Difference]: Finished difference Result 11828 states and 18882 transitions. [2023-04-02 23:54:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:54:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 169 [2023-04-02 23:54:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:54:00,612 INFO L225 Difference]: With dead ends: 11828 [2023-04-02 23:54:00,612 INFO L226 Difference]: Without dead ends: 5362 [2023-04-02 23:54:00,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-04-02 23:54:00,637 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 243 mSDsluCounter, 2515 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 3216 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:54:00,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 3216 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:54:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2023-04-02 23:54:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 5362. [2023-04-02 23:54:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5362 states, 3833 states have (on average 1.4510827028437256) internal successors, (5562), 3959 states have internal predecessors, (5562), 1075 states have call successors, (1075), 373 states have call predecessors, (1075), 453 states have return successors, (1537), 1125 states have call predecessors, (1537), 1067 states have call successors, (1537) [2023-04-02 23:54:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5362 states to 5362 states and 8174 transitions. [2023-04-02 23:54:00,847 INFO L78 Accepts]: Start accepts. Automaton has 5362 states and 8174 transitions. Word has length 169 [2023-04-02 23:54:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:54:00,847 INFO L495 AbstractCegarLoop]: Abstraction has 5362 states and 8174 transitions. [2023-04-02 23:54:00,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:54:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 5362 states and 8174 transitions. [2023-04-02 23:54:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-02 23:54:00,851 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:54:00,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:54:00,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-02 23:54:01,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 23:54:01,061 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:54:01,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:54:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1787701049, now seen corresponding path program 1 times [2023-04-02 23:54:01,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:54:01,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696203913] [2023-04-02 23:54:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:54:01,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:54:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:54:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 23:54:01,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:54:01,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696203913] [2023-04-02 23:54:01,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696203913] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:54:01,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405575866] [2023-04-02 23:54:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:54:01,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:54:01,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:54:01,401 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:54:01,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 23:54:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:54:01,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 2853 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 23:54:01,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:54:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:54:02,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:54:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 23:54:02,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405575866] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:54:02,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1921542561] [2023-04-02 23:54:02,632 INFO L159 IcfgInterpreter]: Started Sifa with 149 locations of interest [2023-04-02 23:54:02,632 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:54:02,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:54:02,639 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:54:02,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:54:04,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 172 for LOIs [2023-04-02 23:54:05,035 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 223 for LOIs [2023-04-02 23:54:07,452 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 223 for LOIs [2023-04-02 23:54:07,826 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 223 for LOIs [2023-04-02 23:54:12,378 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 248063 conjuctions. This might take some time...