/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 00:52:58,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 00:52:58,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 00:52:58,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 00:52:58,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 00:52:58,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 00:52:58,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 00:52:58,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 00:52:58,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 00:52:58,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 00:52:58,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 00:52:58,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 00:52:58,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 00:52:58,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 00:52:58,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 00:52:58,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 00:52:58,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 00:52:58,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 00:52:58,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 00:52:58,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 00:52:58,542 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 00:52:58,578 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 00:52:58,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 00:52:58,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 00:52:58,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 00:52:58,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 00:52:58,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 00:52:58,580 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 00:52:58,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 00:52:58,580 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 00:52:58,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 00:52:58,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 00:52:58,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 00:52:58,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 00:52:58,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 00:52:58,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 00:52:58,582 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 00:52:58,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 00:52:58,582 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 00:52:58,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 00:52:58,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 00:52:58,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 00:52:58,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 00:52:58,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 00:52:58,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 00:52:58,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 00:52:58,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 00:52:58,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 00:52:58,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 00:52:58,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 00:52:58,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 00:52:58,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 00:52:58,584 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 00:52:58,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 00:52:58,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 00:52:58,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 00:52:58,772 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 00:52:58,773 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 00:52:58,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-01-28 00:52:59,977 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 00:53:00,263 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 00:53:00,264 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-01-28 00:53:00,287 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15e239c73/0cbab6742f9144a5a2996772d2288cdf/FLAG59f485c5a [2023-01-28 00:53:00,300 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15e239c73/0cbab6742f9144a5a2996772d2288cdf [2023-01-28 00:53:00,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 00:53:00,303 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 00:53:00,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 00:53:00,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 00:53:00,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 00:53:00,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:53:00" (1/1) ... [2023-01-28 00:53:00,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748350e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:00, skipping insertion in model container [2023-01-28 00:53:00,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:53:00" (1/1) ... [2023-01-28 00:53:00,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 00:53:00,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 00:53:00,862 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-01-28 00:53:00,890 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-01-28 00:53:00,894 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-01-28 00:53:00,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 00:53:00,915 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 00:53:00,956 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-01-28 00:53:00,970 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-01-28 00:53:00,973 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-01-28 00:53:00,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 00:53:01,082 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 00:53:01,083 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 00:53:01,089 INFO L208 MainTranslator]: Completed translation [2023-01-28 00:53:01,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01 WrapperNode [2023-01-28 00:53:01,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 00:53:01,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 00:53:01,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 00:53:01,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 00:53:01,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,215 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1831 [2023-01-28 00:53:01,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 00:53:01,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 00:53:01,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 00:53:01,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 00:53:01,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,320 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 00:53:01,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 00:53:01,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 00:53:01,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 00:53:01,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (1/1) ... [2023-01-28 00:53:01,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 00:53:01,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:53:01,398 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) [2023-01-28 00:53:01,416 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 [2023-01-28 00:53:01,428 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-01-28 00:53:01,432 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-01-28 00:53:01,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 00:53:01,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 00:53:01,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 00:53:01,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 00:53:01,433 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 00:53:01,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 00:53:01,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-01-28 00:53:01,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 00:53:01,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 00:53:01,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 00:53:01,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-01-28 00:53:01,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 00:53:01,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 00:53:01,436 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 00:53:01,790 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 00:53:01,792 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 00:53:03,217 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 00:53:03,505 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 00:53:03,505 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-01-28 00:53:03,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:53:03 BoogieIcfgContainer [2023-01-28 00:53:03,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 00:53:03,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 00:53:03,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 00:53:03,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 00:53:03,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 12:53:00" (1/3) ... [2023-01-28 00:53:03,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6467efb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:53:03, skipping insertion in model container [2023-01-28 00:53:03,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:53:01" (2/3) ... [2023-01-28 00:53:03,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6467efb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:53:03, skipping insertion in model container [2023-01-28 00:53:03,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:53:03" (3/3) ... [2023-01-28 00:53:03,515 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-01-28 00:53:03,530 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 00:53:03,531 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-01-28 00:53:03,531 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 00:53:03,691 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 00:53:03,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1516 places, 1583 transitions, 3174 flow [2023-01-28 00:53:04,548 INFO L130 PetriNetUnfolder]: 131/2943 cut-off events. [2023-01-28 00:53:04,549 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 00:53:04,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 2943 events. 131/2943 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14098 event pairs, 0 based on Foata normal form. 0/2799 useless extension candidates. Maximal degree in co-relation 1505. Up to 6 conditions per place. [2023-01-28 00:53:04,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 1516 places, 1583 transitions, 3174 flow [2023-01-28 00:53:04,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1512 places, 1578 transitions, 3161 flow [2023-01-28 00:53:04,606 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:53:04,625 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1512 places, 1578 transitions, 3161 flow [2023-01-28 00:53:04,629 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1512 places, 1578 transitions, 3161 flow [2023-01-28 00:53:04,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1512 places, 1578 transitions, 3161 flow [2023-01-28 00:53:05,278 INFO L130 PetriNetUnfolder]: 130/2938 cut-off events. [2023-01-28 00:53:05,278 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 00:53:05,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 2938 events. 130/2938 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14037 event pairs, 0 based on Foata normal form. 0/2794 useless extension candidates. Maximal degree in co-relation 1505. Up to 6 conditions per place. [2023-01-28 00:53:05,427 INFO L119 LiptonReduction]: Number of co-enabled transitions 382480 [2023-01-28 00:54:15,299 WARN L222 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 254 DAG size of output: 246 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:54:24,321 WARN L222 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 254 DAG size of output: 246 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:54:27,929 INFO L134 LiptonReduction]: Checked pairs total: 468273 [2023-01-28 00:54:27,929 INFO L136 LiptonReduction]: Total number of compositions: 1493 [2023-01-28 00:54:27,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:54:27,946 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=false, mAutomataTypeConcurrency=PETRI_NET, 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;@75412da3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:54:27,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:54:27,950 INFO L130 PetriNetUnfolder]: 2/24 cut-off events. [2023-01-28 00:54:27,950 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 00:54:27,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:54:27,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 00:54:27,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:54:27,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:54:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash 256841199, now seen corresponding path program 1 times [2023-01-28 00:54:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:54:27,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434245601] [2023-01-28 00:54:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:54:27,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:54:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:54:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 00:54:28,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:54:28,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434245601] [2023-01-28 00:54:28,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434245601] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 00:54:28,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 00:54:28,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 00:54:28,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296236321] [2023-01-28 00:54:28,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 00:54:28,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 00:54:28,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:54:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 00:54:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 00:54:28,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1472 out of 3076 [2023-01-28 00:54:28,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 307 transitions, 619 flow. Second operand has 3 states, 3 states have (on average 1473.6666666666667) internal successors, (4421), 3 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:54:28,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:54:28,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1472 of 3076 [2023-01-28 00:54:28,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:54:32,289 INFO L130 PetriNetUnfolder]: 14422/25324 cut-off events. [2023-01-28 00:54:32,289 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 00:54:32,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50555 conditions, 25324 events. 14422/25324 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 153725 event pairs, 5129 based on Foata normal form. 48/20990 useless extension candidates. Maximal degree in co-relation 50490. Up to 12711 conditions per place. [2023-01-28 00:54:32,340 INFO L137 encePairwiseOnDemand]: 3063/3076 looper letters, 60 selfloop transitions, 4 changer transitions 526/592 dead transitions. [2023-01-28 00:54:32,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 592 transitions, 2365 flow [2023-01-28 00:54:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 00:54:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 00:54:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5012 transitions. [2023-01-28 00:54:32,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431296055483311 [2023-01-28 00:54:32,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5012 transitions. [2023-01-28 00:54:32,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5012 transitions. [2023-01-28 00:54:32,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:54:32,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5012 transitions. [2023-01-28 00:54:32,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1670.6666666666667) internal successors, (5012), 3 states have internal predecessors, (5012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:54:32,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3076.0) internal successors, (12304), 4 states have internal predecessors, (12304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:54:32,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3076.0) internal successors, (12304), 4 states have internal predecessors, (12304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:54:32,422 INFO L175 Difference]: Start difference. First operand has 262 places, 307 transitions, 619 flow. Second operand 3 states and 5012 transitions. [2023-01-28 00:54:32,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 592 transitions, 2365 flow [2023-01-28 00:54:32,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 592 transitions, 2365 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 00:54:32,435 INFO L231 Difference]: Finished difference. Result has 262 places, 37 transitions, 93 flow [2023-01-28 00:54:32,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3076, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=262, PETRI_TRANSITIONS=37} [2023-01-28 00:54:32,440 INFO L281 CegarLoopForPetriNet]: 262 programPoint places, 0 predicate places. [2023-01-28 00:54:32,440 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 37 transitions, 93 flow [2023-01-28 00:54:32,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1473.6666666666667) internal successors, (4421), 3 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:54:32,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:54:32,443 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 00:54:32,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 00:54:32,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:54:32,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:54:32,452 INFO L85 PathProgramCache]: Analyzing trace with hash -961358549, now seen corresponding path program 1 times [2023-01-28 00:54:32,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:54:32,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458157556] [2023-01-28 00:54:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:54:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:54:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:54:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 00:54:32,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:54:32,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458157556] [2023-01-28 00:54:32,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458157556] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 00:54:32,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063684233] [2023-01-28 00:54:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:54:32,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:54:32,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:54:32,605 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) [2023-01-28 00:54:32,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 00:54:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:54:32,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 00:54:32,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 00:54:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 00:54:32,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 00:54:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 00:54:32,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063684233] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 00:54:32,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 00:54:32,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 00:54:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696498152] [2023-01-28 00:54:32,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 00:54:32,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 00:54:32,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:54:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 00:54:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 00:54:32,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1472 out of 3076 [2023-01-28 00:54:32,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 37 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 1473.5714285714287) internal successors, (10315), 7 states have internal predecessors, (10315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:54:32,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:54:32,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1472 of 3076 [2023-01-28 00:54:32,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:54:32,967 INFO L130 PetriNetUnfolder]: 62/146 cut-off events. [2023-01-28 00:54:32,967 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 00:54:32,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 146 events. 62/146 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 323 event pairs, 20 based on Foata normal form. 3/134 useless extension candidates. Maximal degree in co-relation 313. Up to 105 conditions per place. [2023-01-28 00:54:32,968 INFO L137 encePairwiseOnDemand]: 3072/3076 looper letters, 60 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2023-01-28 00:54:32,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 69 transitions, 297 flow [2023-01-28 00:54:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 00:54:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 00:54:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8902 transitions. [2023-01-28 00:54:32,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48233636757693976 [2023-01-28 00:54:32,986 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 8902 transitions. [2023-01-28 00:54:32,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 8902 transitions. [2023-01-28 00:54:32,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:54:32,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 8902 transitions. [2023-01-28 00:54:33,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1483.6666666666667) internal successors, (8902), 6 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:54:33,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3076.0) internal successors, (21532), 7 states have internal predecessors, (21532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:54:33,053 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3076.0) internal successors, (21532), 7 states have internal predecessors, (21532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:54:33,054 INFO L175 Difference]: Start difference. First operand has 262 places, 37 transitions, 93 flow. Second operand 6 states and 8902 transitions. [2023-01-28 00:54:33,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 69 transitions, 297 flow [2023-01-28 00:54:33,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 00:54:33,057 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 117 flow [2023-01-28 00:54:33,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3076, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-01-28 00:54:33,058 INFO L281 CegarLoopForPetriNet]: 262 programPoint places, -222 predicate places. [2023-01-28 00:54:33,058 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 117 flow [2023-01-28 00:54:33,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1473.5714285714287) internal successors, (10315), 7 states have internal predecessors, (10315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:54:33,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:54:33,061 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-28 00:54:33,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 00:54:33,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:54:33,268 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:54:33,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:54:33,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1444739857, now seen corresponding path program 2 times [2023-01-28 00:54:33,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:54:33,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564712592] [2023-01-28 00:54:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:54:33,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:54:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:54:33,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:54:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:54:33,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:54:33,448 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:54:33,449 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:54:33,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 00:54:33,450 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-01-28 00:54:33,453 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:54:33,453 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:54:33,453 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 00:54:33,551 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 00:54:33,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:54:34,583 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-01-28 00:54:34,584 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 00:54:34,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 4488 events. 204/4488 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 26614 event pairs, 0 based on Foata normal form. 0/4264 useless extension candidates. Maximal degree in co-relation 2945. Up to 9 conditions per place. [2023-01-28 00:54:34,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:54:34,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:54:34,688 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:54:34,688 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:54:34,689 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:54:34,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:54:35,592 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-01-28 00:54:35,592 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 00:54:35,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 4488 events. 204/4488 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 26614 event pairs, 0 based on Foata normal form. 0/4264 useless extension candidates. Maximal degree in co-relation 2945. Up to 9 conditions per place. [2023-01-28 00:54:35,980 INFO L119 LiptonReduction]: Number of co-enabled transitions 807240 [2023-01-28 00:55:54,144 WARN L222 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 239 DAG size of output: 234 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:56:02,662 WARN L222 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 239 DAG size of output: 234 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:56:06,559 INFO L134 LiptonReduction]: Checked pairs total: 1038917 [2023-01-28 00:56:06,560 INFO L136 LiptonReduction]: Total number of compositions: 1620 [2023-01-28 00:56:06,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:56:06,562 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=false, mAutomataTypeConcurrency=PETRI_NET, 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;@75412da3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:56:06,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:56:06,569 INFO L130 PetriNetUnfolder]: 3/63 cut-off events. [2023-01-28 00:56:06,569 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 00:56:06,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:56:06,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 00:56:06,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:56:06,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:56:06,570 INFO L85 PathProgramCache]: Analyzing trace with hash 11611069, now seen corresponding path program 1 times [2023-01-28 00:56:06,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:56:06,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19870021] [2023-01-28 00:56:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:56:06,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:56:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:56:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 00:56:06,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:56:06,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19870021] [2023-01-28 00:56:06,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19870021] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 00:56:06,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 00:56:06,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 00:56:06,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956748799] [2023-01-28 00:56:06,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 00:56:06,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 00:56:06,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:56:06,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 00:56:06,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 00:56:06,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1607 out of 3345 [2023-01-28 00:56:06,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 344 transitions, 706 flow. Second operand has 3 states, 3 states have (on average 1609.0) internal successors, (4827), 3 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:56:06,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:56:06,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1607 of 3345 [2023-01-28 00:56:06,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:57:29,557 INFO L130 PetriNetUnfolder]: 627068/892035 cut-off events. [2023-01-28 00:57:29,558 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-01-28 00:57:30,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1781748 conditions, 892035 events. 627068/892035 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 4116. Compared 6455422 event pairs, 245339 based on Foata normal form. 1152/750850 useless extension candidates. Maximal degree in co-relation 1719700. Up to 447244 conditions per place. [2023-01-28 00:57:30,965 INFO L137 encePairwiseOnDemand]: 3329/3345 looper letters, 86 selfloop transitions, 4 changer transitions 578/671 dead transitions. [2023-01-28 00:57:30,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 671 transitions, 2696 flow [2023-01-28 00:57:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 00:57:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 00:57:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5494 transitions. [2023-01-28 00:57:30,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474838066766318 [2023-01-28 00:57:30,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5494 transitions. [2023-01-28 00:57:30,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5494 transitions. [2023-01-28 00:57:30,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:57:30,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5494 transitions. [2023-01-28 00:57:30,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1831.3333333333333) internal successors, (5494), 3 states have internal predecessors, (5494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:31,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3345.0) internal successors, (13380), 4 states have internal predecessors, (13380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:31,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3345.0) internal successors, (13380), 4 states have internal predecessors, (13380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:31,003 INFO L175 Difference]: Start difference. First operand has 293 places, 344 transitions, 706 flow. Second operand 3 states and 5494 transitions. [2023-01-28 00:57:31,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 671 transitions, 2696 flow [2023-01-28 00:57:31,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 671 transitions, 2696 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 00:57:31,012 INFO L231 Difference]: Finished difference. Result has 296 places, 65 transitions, 158 flow [2023-01-28 00:57:31,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3345, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=296, PETRI_TRANSITIONS=65} [2023-01-28 00:57:31,014 INFO L281 CegarLoopForPetriNet]: 293 programPoint places, 3 predicate places. [2023-01-28 00:57:31,015 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 65 transitions, 158 flow [2023-01-28 00:57:31,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1609.0) internal successors, (4827), 3 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:31,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:57:31,016 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-28 00:57:31,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 00:57:31,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:57:31,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:57:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash -71965933, now seen corresponding path program 1 times [2023-01-28 00:57:31,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:57:31,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901212417] [2023-01-28 00:57:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:57:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:57:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:57:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 00:57:31,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:57:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901212417] [2023-01-28 00:57:31,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901212417] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 00:57:31,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993515277] [2023-01-28 00:57:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:57:31,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:57:31,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:57:31,133 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) [2023-01-28 00:57:31,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 00:57:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:57:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 00:57:31,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 00:57:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 00:57:31,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 00:57:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 00:57:31,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993515277] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 00:57:31,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 00:57:31,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 00:57:31,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806194727] [2023-01-28 00:57:31,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 00:57:31,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 00:57:31,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:57:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 00:57:31,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 00:57:31,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1607 out of 3345 [2023-01-28 00:57:31,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 65 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 1608.7142857142858) internal successors, (11261), 7 states have internal predecessors, (11261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:31,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:57:31,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1607 of 3345 [2023-01-28 00:57:31,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:57:31,868 INFO L130 PetriNetUnfolder]: 3266/5098 cut-off events. [2023-01-28 00:57:31,868 INFO L131 PetriNetUnfolder]: For 624/624 co-relation queries the response was YES. [2023-01-28 00:57:31,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10835 conditions, 5098 events. 3266/5098 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 24775 event pairs, 528 based on Foata normal form. 3/4525 useless extension candidates. Maximal degree in co-relation 568. Up to 3169 conditions per place. [2023-01-28 00:57:31,889 INFO L137 encePairwiseOnDemand]: 3340/3345 looper letters, 138 selfloop transitions, 9 changer transitions 0/150 dead transitions. [2023-01-28 00:57:31,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 150 transitions, 628 flow [2023-01-28 00:57:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 00:57:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 00:57:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9792 transitions. [2023-01-28 00:57:31,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48789237668161434 [2023-01-28 00:57:31,908 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 9792 transitions. [2023-01-28 00:57:31,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 9792 transitions. [2023-01-28 00:57:31,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:57:31,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 9792 transitions. [2023-01-28 00:57:31,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1632.0) internal successors, (9792), 6 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:31,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3345.0) internal successors, (23415), 7 states have internal predecessors, (23415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:31,954 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3345.0) internal successors, (23415), 7 states have internal predecessors, (23415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:31,954 INFO L175 Difference]: Start difference. First operand has 296 places, 65 transitions, 158 flow. Second operand 6 states and 9792 transitions. [2023-01-28 00:57:31,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 150 transitions, 628 flow [2023-01-28 00:57:31,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 150 transitions, 622 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 00:57:31,962 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 192 flow [2023-01-28 00:57:31,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3345, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-01-28 00:57:31,964 INFO L281 CegarLoopForPetriNet]: 293 programPoint places, -226 predicate places. [2023-01-28 00:57:31,964 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 192 flow [2023-01-28 00:57:31,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1608.7142857142858) internal successors, (11261), 7 states have internal predecessors, (11261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:31,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:57:31,967 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 00:57:31,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 00:57:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:57:32,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:57:32,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:57:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash -137408195, now seen corresponding path program 2 times [2023-01-28 00:57:32,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:57:32,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120087086] [2023-01-28 00:57:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:57:32,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:57:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:57:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 00:57:32,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:57:32,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120087086] [2023-01-28 00:57:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120087086] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 00:57:32,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825275693] [2023-01-28 00:57:32,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 00:57:32,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:57:32,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:57:32,361 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) [2023-01-28 00:57:32,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 00:57:32,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 00:57:32,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 00:57:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 00:57:32,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 00:57:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 00:57:32,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 00:57:32,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825275693] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 00:57:32,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 00:57:32,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-01-28 00:57:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533457227] [2023-01-28 00:57:32,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 00:57:32,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 00:57:32,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:57:32,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 00:57:32,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-01-28 00:57:32,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1607 out of 3345 [2023-01-28 00:57:32,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:32,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:57:32,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1607 of 3345 [2023-01-28 00:57:32,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:57:33,439 INFO L130 PetriNetUnfolder]: 2021/3253 cut-off events. [2023-01-28 00:57:33,439 INFO L131 PetriNetUnfolder]: For 3408/3408 co-relation queries the response was YES. [2023-01-28 00:57:33,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7730 conditions, 3253 events. 2021/3253 cut-off events. For 3408/3408 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 15020 event pairs, 0 based on Foata normal form. 552/3416 useless extension candidates. Maximal degree in co-relation 382. Up to 1801 conditions per place. [2023-01-28 00:57:33,445 INFO L137 encePairwiseOnDemand]: 3340/3345 looper letters, 0 selfloop transitions, 0 changer transitions 148/148 dead transitions. [2023-01-28 00:57:33,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 148 transitions, 639 flow [2023-01-28 00:57:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 00:57:33,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 00:57:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 8180 transitions. [2023-01-28 00:57:33,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890881913303438 [2023-01-28 00:57:33,459 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 8180 transitions. [2023-01-28 00:57:33,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 8180 transitions. [2023-01-28 00:57:33,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:57:33,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 8180 transitions. [2023-01-28 00:57:33,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 1636.0) internal successors, (8180), 5 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:33,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 3345.0) internal successors, (20070), 6 states have internal predecessors, (20070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:33,486 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 3345.0) internal successors, (20070), 6 states have internal predecessors, (20070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:33,486 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 192 flow. Second operand 5 states and 8180 transitions. [2023-01-28 00:57:33,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 148 transitions, 639 flow [2023-01-28 00:57:33,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 148 transitions, 618 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-28 00:57:33,490 INFO L231 Difference]: Finished difference. Result has 67 places, 0 transitions, 0 flow [2023-01-28 00:57:33,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3345, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=67, PETRI_TRANSITIONS=0} [2023-01-28 00:57:33,491 INFO L281 CegarLoopForPetriNet]: 293 programPoint places, -226 predicate places. [2023-01-28 00:57:33,491 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 0 transitions, 0 flow [2023-01-28 00:57:33,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:57:33,492 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:57:33,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 00:57:33,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:57:33,699 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-01-28 00:57:33,700 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-01-28 00:57:33,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:57:34,625 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-01-28 00:57:34,625 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 00:57:34,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 4488 events. 204/4488 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 26614 event pairs, 0 based on Foata normal form. 0/4264 useless extension candidates. Maximal degree in co-relation 2945. Up to 9 conditions per place. [2023-01-28 00:57:34,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:57:34,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:57:34,675 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:57:34,675 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:57:34,675 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:57:34,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-01-28 00:57:35,414 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-01-28 00:57:35,414 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 00:57:35,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 4488 events. 204/4488 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 26614 event pairs, 0 based on Foata normal form. 0/4264 useless extension candidates. Maximal degree in co-relation 2945. Up to 9 conditions per place. [2023-01-28 00:57:35,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 807240 [2023-01-28 00:58:44,055 WARN L222 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 235 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:58:52,912 WARN L222 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 235 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:59:02,337 WARN L222 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 214 DAG size of output: 209 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:59:11,230 WARN L222 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 214 DAG size of output: 209 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:59:13,775 INFO L134 LiptonReduction]: Checked pairs total: 1021771 [2023-01-28 00:59:13,775 INFO L136 LiptonReduction]: Total number of compositions: 1617 [2023-01-28 00:59:13,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 00:59:13,777 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=false, mAutomataTypeConcurrency=PETRI_NET, 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;@75412da3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:59:13,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 00:59:13,780 INFO L130 PetriNetUnfolder]: 2/25 cut-off events. [2023-01-28 00:59:13,781 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 00:59:13,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:59:13,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:59:13,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 00:59:13,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:59:13,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1813057445, now seen corresponding path program 1 times [2023-01-28 00:59:13,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:59:13,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883369135] [2023-01-28 00:59:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:59:13,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:59:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:59:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 00:59:13,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:59:13,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883369135] [2023-01-28 00:59:13,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883369135] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 00:59:13,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 00:59:13,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 00:59:13,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50924753] [2023-01-28 00:59:13,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 00:59:13,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 00:59:13,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:59:13,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 00:59:13,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 00:59:13,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1607 out of 3342 [2023-01-28 00:59:13,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 339 transitions, 696 flow. Second operand has 3 states, 3 states have (on average 1609.3333333333333) internal successors, (4828), 3 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 00:59:13,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:59:13,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1607 of 3342 [2023-01-28 00:59:13,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:00:36,209 INFO L130 PetriNetUnfolder]: 648674/922170 cut-off events. [2023-01-28 01:00:36,210 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-01-28 01:00:37,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843218 conditions, 922170 events. 648674/922170 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 4025. Compared 6626479 event pairs, 256013 based on Foata normal form. 1200/780529 useless extension candidates. Maximal degree in co-relation 1781203. Up to 463011 conditions per place. [2023-01-28 01:00:39,632 INFO L137 encePairwiseOnDemand]: 3326/3342 looper letters, 642 selfloop transitions, 14 changer transitions 4/663 dead transitions. [2023-01-28 01:00:39,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 663 transitions, 2668 flow [2023-01-28 01:00:39,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:00:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:00:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5488 transitions. [2023-01-28 01:00:39,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547376820267305 [2023-01-28 01:00:39,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5488 transitions. [2023-01-28 01:00:39,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5488 transitions. [2023-01-28 01:00:39,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:00:39,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5488 transitions. [2023-01-28 01:00:39,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1829.3333333333333) internal successors, (5488), 3 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:00:39,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3342.0) internal successors, (13368), 4 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:00:39,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3342.0) internal successors, (13368), 4 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:00:39,653 INFO L175 Difference]: Start difference. First operand has 291 places, 339 transitions, 696 flow. Second operand 3 states and 5488 transitions. [2023-01-28 01:00:39,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 663 transitions, 2668 flow [2023-01-28 01:00:39,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 663 transitions, 2668 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:00:39,663 INFO L231 Difference]: Finished difference. Result has 294 places, 343 transitions, 758 flow [2023-01-28 01:00:39,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3342, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=758, PETRI_PLACES=294, PETRI_TRANSITIONS=343} [2023-01-28 01:00:39,664 INFO L281 CegarLoopForPetriNet]: 291 programPoint places, 3 predicate places. [2023-01-28 01:00:39,664 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 343 transitions, 758 flow [2023-01-28 01:00:39,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1609.3333333333333) internal successors, (4828), 3 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:00:39,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:00:39,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:00:39,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 01:00:39,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 01:00:39,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:00:39,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1203681009, now seen corresponding path program 1 times [2023-01-28 01:00:39,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:00:39,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508313053] [2023-01-28 01:00:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:00:39,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:00:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:00:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 01:00:39,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:00:39,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508313053] [2023-01-28 01:00:39,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508313053] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:00:39,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41988248] [2023-01-28 01:00:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:00:39,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:00:39,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:00:39,793 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) [2023-01-28 01:00:39,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 01:00:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:00:40,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:00:40,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:00:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 01:00:40,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:00:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 01:00:40,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41988248] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:00:40,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:00:40,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:00:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649224081] [2023-01-28 01:00:40,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:00:40,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:00:40,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:00:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:00:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:00:40,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1607 out of 3342 [2023-01-28 01:00:40,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 343 transitions, 758 flow. Second operand has 7 states, 7 states have (on average 1612.7142857142858) internal successors, (11289), 7 states have internal predecessors, (11289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:00:40,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:00:40,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1607 of 3342 [2023-01-28 01:00:40,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand