./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:00:12,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:00:12,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:00:12,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:00:12,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:00:12,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:00:12,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:00:12,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:00:12,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:00:12,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:00:12,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:00:12,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:00:12,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:00:12,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:00:12,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:00:12,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:00:12,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:00:12,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:00:12,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:00:12,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:00:12,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:00:12,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:00:12,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:00:12,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:00:12,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:00:12,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:00:12,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:00:12,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:00:12,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:00:12,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:00:12,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:00:12,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:00:12,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:00:12,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:00:12,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:00:12,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:00:12,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:00:12,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:00:12,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:00:12,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:00:12,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:00:12,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:00:12,650 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:00:12,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:00:12,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:00:12,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:00:12,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:00:12,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:00:12,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:00:12,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:00:12,654 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:00:12,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:00:12,655 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:00:12,655 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:00:12,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:00:12,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:00:12,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:00:12,656 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:00:12,657 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:00:12,657 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:00:12,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:00:12,657 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:00:12,657 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:00:12,658 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:00:12,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:00:12,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:00:12,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:00:12,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:00:12,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:00:12,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:00:12,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:00:12,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:00:12,660 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:00:12,660 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:00:12,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:00:12,661 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:00:12,661 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:00:12,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:00:13,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:00:13,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:00:13,031 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:00:13,032 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:00:13,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-09-01 00:00:14,298 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:00:14,675 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:00:14,676 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-09-01 00:00:14,703 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ba6de6c/1ea299bc6fff4f1786263416a2e753b8/FLAGfeaea923d [2023-09-01 00:00:14,722 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ba6de6c/1ea299bc6fff4f1786263416a2e753b8 [2023-09-01 00:00:14,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:00:14,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:00:14,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:00:14,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:00:14,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:00:14,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:00:14" (1/1) ... [2023-09-01 00:00:14,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fad0ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:14, skipping insertion in model container [2023-09-01 00:00:14,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:00:14" (1/1) ... [2023-09-01 00:00:14,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:00:14,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:00:15,430 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] [2023-09-01 00:00:15,469 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] [2023-09-01 00:00:15,477 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] [2023-09-01 00:00:15,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:00:15,507 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:00:15,538 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] [2023-09-01 00:00:15,550 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] [2023-09-01 00:00:15,552 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] [2023-09-01 00:00:15,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:00:15,654 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 00:00:15,654 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 00:00:15,660 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:00:15,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15 WrapperNode [2023-09-01 00:00:15,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:00:15,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:00:15,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:00:15,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:00:15,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,780 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1831 [2023-09-01 00:00:15,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:00:15,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:00:15,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:00:15,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:00:15,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,872 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:00:15,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:00:15,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:00:15,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:00:15,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (1/1) ... [2023-09-01 00:00:15,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:00:15,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:00:15,966 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) [2023-09-01 00:00:15,995 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 [2023-09-01 00:00:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-09-01 00:00:16,011 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-09-01 00:00:16,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 00:00:16,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:00:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 00:00:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:00:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:00:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:00:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 00:00:16,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:00:16,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:00:16,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:00:16,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 00:00:16,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:00:16,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:00:16,016 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:00:16,409 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:00:16,411 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:00:18,519 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:00:19,172 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:00:19,172 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-09-01 00:00:19,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:00:19 BoogieIcfgContainer [2023-09-01 00:00:19,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:00:19,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:00:19,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:00:19,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:00:19,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:00:14" (1/3) ... [2023-09-01 00:00:19,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6724bca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:00:19, skipping insertion in model container [2023-09-01 00:00:19,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:00:15" (2/3) ... [2023-09-01 00:00:19,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6724bca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:00:19, skipping insertion in model container [2023-09-01 00:00:19,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:00:19" (3/3) ... [2023-09-01 00:00:19,184 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-09-01 00:00:19,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:00:19,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 520 error locations. [2023-09-01 00:00:19,202 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:00:19,478 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:00:19,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2034 places, 2101 transitions, 4210 flow [2023-09-01 00:00:20,733 INFO L130 PetriNetUnfolder]: 131/3918 cut-off events. [2023-09-01 00:00:20,733 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 00:00:20,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3924 conditions, 3918 events. 131/3918 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 22055 event pairs, 0 based on Foata normal form. 0/2804 useless extension candidates. Maximal degree in co-relation 2006. Up to 6 conditions per place. [2023-09-01 00:00:20,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 2034 places, 2101 transitions, 4210 flow [2023-09-01 00:00:20,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2014 places, 2080 transitions, 4165 flow [2023-09-01 00:00:20,837 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:00:20,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2014 places, 2080 transitions, 4165 flow [2023-09-01 00:00:20,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2014 places, 2080 transitions, 4165 flow [2023-09-01 00:00:20,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2014 places, 2080 transitions, 4165 flow [2023-09-01 00:00:21,771 INFO L130 PetriNetUnfolder]: 130/3897 cut-off events. [2023-09-01 00:00:21,772 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:00:21,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3902 conditions, 3897 events. 130/3897 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 21986 event pairs, 0 based on Foata normal form. 0/2799 useless extension candidates. Maximal degree in co-relation 2006. Up to 6 conditions per place. [2023-09-01 00:00:22,062 INFO L119 LiptonReduction]: Number of co-enabled transitions 670864 [2023-09-01 00:02:16,410 WARN L222 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 225 DAG size of output: 213 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 00:02:27,554 WARN L222 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 226 DAG size of output: 216 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 00:02:39,182 WARN L222 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 216 DAG size of output: 211 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 00:02:49,413 WARN L222 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 219 DAG size of output: 214 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 00:02:52,099 INFO L134 LiptonReduction]: Checked pairs total: 1716154 [2023-09-01 00:02:52,100 INFO L136 LiptonReduction]: Total number of compositions: 2611 [2023-09-01 00:02:52,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:02:52,118 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=All, 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;@24e97f82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:02:52,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:02:52,127 INFO L130 PetriNetUnfolder]: 2/68 cut-off events. [2023-09-01 00:02:52,127 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:02:52,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:02:52,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 00:02:52,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:02:52,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:02:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash 29965088, now seen corresponding path program 1 times [2023-09-01 00:02:52,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:02:52,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955036512] [2023-09-01 00:02:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:02:52,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:02:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:02:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:02:52,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:02:52,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955036512] [2023-09-01 00:02:52,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955036512] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:02:52,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:02:52,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:02:52,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602950832] [2023-09-01 00:02:52,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:02:52,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:02:52,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:02:52,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:02:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:02:52,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1776 out of 4712 [2023-09-01 00:02:52,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 765 transitions, 1535 flow. Second operand has 3 states, 3 states have (on average 1777.6666666666667) internal successors, (5333), 3 states have internal predecessors, (5333), 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) [2023-09-01 00:02:52,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:02:52,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1776 of 4712 [2023-09-01 00:02:52,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:03:02,535 INFO L130 PetriNetUnfolder]: 42106/85240 cut-off events. [2023-09-01 00:03:02,535 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:03:02,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165857 conditions, 85240 events. 42106/85240 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 762944 event pairs, 18834 based on Foata normal form. 264/37942 useless extension candidates. Maximal degree in co-relation 165748. Up to 40437 conditions per place. [2023-09-01 00:03:02,663 INFO L137 encePairwiseOnDemand]: 4511/4712 looper letters, 96 selfloop transitions, 4 changer transitions 963/1071 dead transitions. [2023-09-01 00:03:02,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 1071 transitions, 4173 flow [2023-09-01 00:03:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:03:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:03:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6723 transitions. [2023-09-01 00:03:02,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47559422750424446 [2023-09-01 00:03:02,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 6723 transitions. [2023-09-01 00:03:02,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 6723 transitions. [2023-09-01 00:03:02,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:03:02,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 6723 transitions. [2023-09-01 00:03:02,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 2241.0) internal successors, (6723), 3 states have internal predecessors, (6723), 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) [2023-09-01 00:03:02,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 4712.0) internal successors, (18848), 4 states have internal predecessors, (18848), 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) [2023-09-01 00:03:02,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 4712.0) internal successors, (18848), 4 states have internal predecessors, (18848), 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) [2023-09-01 00:03:02,777 INFO L175 Difference]: Start difference. First operand has 739 places, 765 transitions, 1535 flow. Second operand 3 states and 6723 transitions. [2023-09-01 00:03:02,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 1071 transitions, 4173 flow [2023-09-01 00:03:02,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 1071 transitions, 4173 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:03:02,808 INFO L231 Difference]: Finished difference. Result has 550 places, 61 transitions, 141 flow [2023-09-01 00:03:02,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=4712, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=550, PETRI_TRANSITIONS=61} [2023-09-01 00:03:02,816 INFO L281 CegarLoopForPetriNet]: 739 programPoint places, -189 predicate places. [2023-09-01 00:03:02,817 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 61 transitions, 141 flow [2023-09-01 00:03:02,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1777.6666666666667) internal successors, (5333), 3 states have internal predecessors, (5333), 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) [2023-09-01 00:03:02,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:03:02,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:03:02,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:03:02,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:03:02,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:03:02,832 INFO L85 PathProgramCache]: Analyzing trace with hash -703680568, now seen corresponding path program 1 times [2023-09-01 00:03:02,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:03:02,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248815216] [2023-09-01 00:03:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:03:02,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:03:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:03:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:03:02,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:03:02,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248815216] [2023-09-01 00:03:02,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248815216] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:03:02,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208237749] [2023-09-01 00:03:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:03:02,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:03:02,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:03:02,981 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) [2023-09-01 00:03:02,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 00:03:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:03:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:03:03,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:03:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:03:03,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:03:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:03:03,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208237749] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:03:03,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:03:03,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:03:03,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256009475] [2023-09-01 00:03:03,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:03:03,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:03:03,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:03:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:03:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:03:03,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1770 out of 4712 [2023-09-01 00:03:03,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 61 transitions, 141 flow. Second operand has 7 states, 7 states have (on average 1771.5714285714287) internal successors, (12401), 7 states have internal predecessors, (12401), 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) [2023-09-01 00:03:03,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:03:03,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1770 of 4712 [2023-09-01 00:03:03,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:03:03,592 INFO L130 PetriNetUnfolder]: 96/286 cut-off events. [2023-09-01 00:03:03,592 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2023-09-01 00:03:03,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 286 events. 96/286 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1289 event pairs, 0 based on Foata normal form. 3/210 useless extension candidates. Maximal degree in co-relation 547. Up to 181 conditions per place. [2023-09-01 00:03:03,594 INFO L137 encePairwiseOnDemand]: 4708/4712 looper letters, 96 selfloop transitions, 7 changer transitions 0/111 dead transitions. [2023-09-01 00:03:03,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 111 transitions, 453 flow [2023-09-01 00:03:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:03:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:03:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10726 transitions. [2023-09-01 00:03:03,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793859649122807 [2023-09-01 00:03:03,621 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 10726 transitions. [2023-09-01 00:03:03,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 10726 transitions. [2023-09-01 00:03:03,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:03:03,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 10726 transitions. [2023-09-01 00:03:03,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1787.6666666666667) internal successors, (10726), 6 states have internal predecessors, (10726), 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) [2023-09-01 00:03:03,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 4712.0) internal successors, (32984), 7 states have internal predecessors, (32984), 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) [2023-09-01 00:03:03,693 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 4712.0) internal successors, (32984), 7 states have internal predecessors, (32984), 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) [2023-09-01 00:03:03,694 INFO L175 Difference]: Start difference. First operand has 550 places, 61 transitions, 141 flow. Second operand 6 states and 10726 transitions. [2023-09-01 00:03:03,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 111 transitions, 453 flow [2023-09-01 00:03:03,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 111 transitions, 449 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:03:03,697 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 165 flow [2023-09-01 00:03:03,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=4712, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2023-09-01 00:03:03,699 INFO L281 CegarLoopForPetriNet]: 739 programPoint places, -673 predicate places. [2023-09-01 00:03:03,699 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 165 flow [2023-09-01 00:03:03,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1771.5714285714287) internal successors, (12401), 7 states have internal predecessors, (12401), 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) [2023-09-01 00:03:03,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:03:03,704 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 00:03:03,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 00:03:03,911 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 [2023-09-01 00:03:03,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:03:03,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:03:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1579866848, now seen corresponding path program 2 times [2023-09-01 00:03:03,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:03:03,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321891651] [2023-09-01 00:03:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:03:03,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:03:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:03:04,049 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:03:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:03:04,188 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:03:04,188 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:03:04,189 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:03:04,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 00:03:04,191 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-09-01 00:03:04,193 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:03:04,194 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:03:04,194 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:03:04,322 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:03:04,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2215 places, 2287 transitions, 4592 flow [2023-09-01 00:03:06,456 INFO L130 PetriNetUnfolder]: 204/5971 cut-off events. [2023-09-01 00:03:06,457 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:03:06,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5985 conditions, 5971 events. 204/5971 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 40407 event pairs, 0 based on Foata normal form. 0/4273 useless extension candidates. Maximal degree in co-relation 3920. Up to 9 conditions per place. [2023-09-01 00:03:06,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 2215 places, 2287 transitions, 4592 flow [2023-09-01 00:03:06,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2199 places, 2271 transitions, 4560 flow [2023-09-01 00:03:06,557 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:03:06,558 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2199 places, 2271 transitions, 4560 flow [2023-09-01 00:03:06,558 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2199 places, 2271 transitions, 4560 flow [2023-09-01 00:03:06,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2199 places, 2271 transitions, 4560 flow [2023-09-01 00:03:08,206 INFO L130 PetriNetUnfolder]: 204/5955 cut-off events. [2023-09-01 00:03:08,206 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:03:08,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5969 conditions, 5955 events. 204/5955 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 40364 event pairs, 0 based on Foata normal form. 0/4273 useless extension candidates. Maximal degree in co-relation 3904. Up to 9 conditions per place. [2023-09-01 00:03:08,699 INFO L119 LiptonReduction]: Number of co-enabled transitions 1413488 [2023-09-01 00:05:16,464 WARN L222 SmtUtils]: Spent 7.91s on a formula simplification. DAG size of input: 228 DAG size of output: 213 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 00:05:27,461 WARN L222 SmtUtils]: Spent 6.88s on a formula simplification. DAG size of input: 228 DAG size of output: 213 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 00:05:30,944 INFO L134 LiptonReduction]: Checked pairs total: 3528161 [2023-09-01 00:05:30,944 INFO L136 LiptonReduction]: Total number of compositions: 2745 [2023-09-01 00:05:30,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:05:30,955 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=All, 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;@24e97f82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:05:30,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:05:30,971 INFO L130 PetriNetUnfolder]: 3/182 cut-off events. [2023-09-01 00:05:30,972 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:05:30,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:05:30,972 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:05:30,972 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:05:30,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:05:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1947265817, now seen corresponding path program 1 times [2023-09-01 00:05:30,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:05:30,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138916490] [2023-09-01 00:05:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:05:30,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:05:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:05:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:05:31,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:05:31,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138916490] [2023-09-01 00:05:31,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138916490] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:05:31,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:05:31,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:05:31,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228652490] [2023-09-01 00:05:31,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:05:31,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:05:31,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:05:31,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:05:31,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:05:31,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1935 out of 5032 [2023-09-01 00:05:31,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 811 places, 840 transitions, 1698 flow. Second operand has 3 states, 3 states have (on average 1937.0) internal successors, (5811), 3 states have internal predecessors, (5811), 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) [2023-09-01 00:05:31,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:05:31,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1935 of 5032 [2023-09-01 00:05:31,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand