./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.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 overflows 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --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 05:38:46,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 05:38:46,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 05:38:46,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 05:38:46,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 05:38:46,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 05:38:46,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 05:38:46,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 05:38:46,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 05:38:46,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 05:38:46,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 05:38:46,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 05:38:46,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 05:38:46,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 05:38:46,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 05:38:46,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 05:38:46,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 05:38:46,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 05:38:46,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 05:38:46,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 05:38:46,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 05:38:46,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 05:38:46,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 05:38:46,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 05:38:46,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 05:38:46,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 05:38:46,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 05:38:46,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 05:38:46,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 05:38:46,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 05:38:46,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 05:38:46,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 05:38:46,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 05:38:46,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 05:38:46,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 05:38:46,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 05:38:46,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 05:38:46,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 05:38:46,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 05:38:46,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 05:38:46,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 05:38:46,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 05:38:46,851 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 05:38:46,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 05:38:46,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 05:38:46,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 05:38:46,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 05:38:46,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 05:38:46,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 05:38:46,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 05:38:46,854 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 05:38:46,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 05:38:46,855 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 05:38:46,855 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 05:38:46,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 05:38:46,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 05:38:46,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 05:38:46,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 05:38:46,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 05:38:46,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 05:38:46,856 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 05:38:46,856 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 05:38:46,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 05:38:46,856 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 05:38:46,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 05:38:46,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 05:38:46,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 05:38:46,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 05:38:46,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 05:38:46,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 05:38:46,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 05:38:46,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 05:38:46,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 05:38:46,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 05:38:46,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 05:38:46,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 05:38:46,859 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 05:38:46,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 05:38:46,859 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 05:38:46,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 05:38:47,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 05:38:47,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 05:38:47,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 05:38:47,108 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 05:38:47,108 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 05:38:47,110 INFO L432 ainManager$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 05:38:48,136 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 05:38:48,344 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 05:38:48,344 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-09-01 05:38:48,356 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f1c133ff/057028b9ee704d7399ab7182dc419944/FLAG30c14c8d8 [2023-09-01 05:38:48,674 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f1c133ff/057028b9ee704d7399ab7182dc419944 [2023-09-01 05:38:48,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 05:38:48,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 05:38:48,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 05:38:48,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 05:38:48,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 05:38:48,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 05:38:48" (1/1) ... [2023-09-01 05:38:48,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ebee1fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:48, skipping insertion in model container [2023-09-01 05:38:48,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 05:38:48" (1/1) ... [2023-09-01 05:38:48,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 05:38:48,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 05:38:49,144 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 05:38:49,176 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 05:38:49,180 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 05:38:49,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 05:38:49,204 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 05:38:49,235 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 05:38:49,260 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 05:38:49,263 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 05:38:49,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 05:38:49,368 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 05:38:49,385 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 05:38:49,389 INFO L208 MainTranslator]: Completed translation [2023-09-01 05:38:49,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49 WrapperNode [2023-09-01 05:38:49,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 05:38:49,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 05:38:49,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 05:38:49,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 05:38:49,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,568 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1921 [2023-09-01 05:38:49,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 05:38:49,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 05:38:49,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 05:38:49,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 05:38:49,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,672 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 05:38:49,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 05:38:49,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 05:38:49,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 05:38:49,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (1/1) ... [2023-09-01 05:38:49,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 05:38:49,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 05:38:49,738 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 05:38:49,756 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 05:38:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-09-01 05:38:49,768 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-09-01 05:38:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 05:38:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 05:38:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 05:38:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 05:38:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 05:38:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 05:38:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 05:38:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 05:38:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 05:38:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 05:38:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 05:38:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 05:38:49,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 05:38:49,771 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 05:38:50,069 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 05:38:50,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 05:38:51,466 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 05:38:51,683 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 05:38:51,683 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-09-01 05:38:51,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 05:38:51 BoogieIcfgContainer [2023-09-01 05:38:51,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 05:38:51,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 05:38:51,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 05:38:51,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 05:38:51,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 05:38:48" (1/3) ... [2023-09-01 05:38:51,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579141bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 05:38:51, skipping insertion in model container [2023-09-01 05:38:51,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:38:49" (2/3) ... [2023-09-01 05:38:51,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579141bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 05:38:51, skipping insertion in model container [2023-09-01 05:38:51,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 05:38:51" (3/3) ... [2023-09-01 05:38:51,691 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-09-01 05:38:51,697 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 05:38:51,704 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 05:38:51,704 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 90 error locations. [2023-09-01 05:38:51,704 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 05:38:51,824 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 05:38:51,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1694 places, 1761 transitions, 3530 flow [2023-09-01 05:38:52,509 INFO L130 PetriNetUnfolder]: 131/3271 cut-off events. [2023-09-01 05:38:52,510 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 05:38:52,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3277 conditions, 3271 events. 131/3271 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 16200 event pairs, 0 based on Foata normal form. 0/2971 useless extension candidates. Maximal degree in co-relation 1671. Up to 6 conditions per place. [2023-09-01 05:38:52,543 INFO L82 GeneralOperation]: Start removeDead. Operand has 1694 places, 1761 transitions, 3530 flow [2023-09-01 05:38:52,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1682 places, 1748 transitions, 3501 flow [2023-09-01 05:38:52,560 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:38:52,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1682 places, 1748 transitions, 3501 flow [2023-09-01 05:38:52,568 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1682 places, 1748 transitions, 3501 flow [2023-09-01 05:38:52,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1682 places, 1748 transitions, 3501 flow [2023-09-01 05:38:53,082 INFO L130 PetriNetUnfolder]: 130/3258 cut-off events. [2023-09-01 05:38:53,083 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:38:53,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3263 conditions, 3258 events. 130/3258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 16110 event pairs, 0 based on Foata normal form. 0/2964 useless extension candidates. Maximal degree in co-relation 1671. Up to 6 conditions per place. [2023-09-01 05:38:53,200 INFO L119 LiptonReduction]: Number of co-enabled transitions 462080 [2023-09-01 05:40:03,167 WARN L222 SmtUtils]: Spent 8.75s on a formula simplification. DAG size of input: 204 DAG size of output: 201 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 05:40:17,144 WARN L222 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 226 DAG size of output: 218 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 05:40:30,688 WARN L222 SmtUtils]: Spent 9.10s on a formula simplification. DAG size of input: 226 DAG size of output: 218 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 05:40:42,731 WARN L222 SmtUtils]: Spent 8.60s 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) [2023-09-01 05:40:54,740 WARN L222 SmtUtils]: Spent 8.11s 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) [2023-09-01 05:40:58,680 INFO L134 LiptonReduction]: Checked pairs total: 637421 [2023-09-01 05:40:58,683 INFO L136 LiptonReduction]: Total number of compositions: 1725 [2023-09-01 05:40:58,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:40:58,722 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@34e9743b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:40:58,723 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:40:58,734 INFO L130 PetriNetUnfolder]: 2/35 cut-off events. [2023-09-01 05:40:58,734 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:40:58,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:40:58,735 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 05:40:58,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:40:58,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:40:58,740 INFO L85 PathProgramCache]: Analyzing trace with hash 688860531, now seen corresponding path program 1 times [2023-09-01 05:40:58,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:40:58,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800429456] [2023-09-01 05:40:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:40:58,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:40:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:40:59,085 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 05:40:59,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:40:59,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800429456] [2023-09-01 05:40:59,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800429456] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 05:40:59,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 05:40:59,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 05:40:59,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958039099] [2023-09-01 05:40:59,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 05:40:59,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 05:40:59,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:40:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 05:40:59,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 05:40:59,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1662 out of 3486 [2023-09-01 05:40:59,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 367 transitions, 739 flow. Second operand has 3 states, 3 states have (on average 1663.6666666666667) internal successors, (4991), 3 states have internal predecessors, (4991), 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 05:40:59,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:40:59,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1662 of 3486 [2023-09-01 05:40:59,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:41:03,228 INFO L130 PetriNetUnfolder]: 20182/36765 cut-off events. [2023-09-01 05:41:03,228 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:41:03,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73336 conditions, 36765 events. 20182/36765 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 248531 event pairs, 7830 based on Foata normal form. 60/26579 useless extension candidates. Maximal degree in co-relation 73259. Up to 18409 conditions per place. [2023-09-01 05:41:03,295 INFO L137 encePairwiseOnDemand]: 3458/3486 looper letters, 72 selfloop transitions, 4 changer transitions 601/679 dead transitions. [2023-09-01 05:41:03,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 679 transitions, 2711 flow [2023-09-01 05:41:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 05:41:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 05:41:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5697 transitions. [2023-09-01 05:41:03,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544750430292599 [2023-09-01 05:41:03,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5697 transitions. [2023-09-01 05:41:03,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5697 transitions. [2023-09-01 05:41:03,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:41:03,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5697 transitions. [2023-09-01 05:41:03,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1899.0) internal successors, (5697), 3 states have internal predecessors, (5697), 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 05:41:03,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3486.0) internal successors, (13944), 4 states have internal predecessors, (13944), 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 05:41:03,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3486.0) internal successors, (13944), 4 states have internal predecessors, (13944), 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 05:41:03,355 INFO L175 Difference]: Start difference. First operand has 333 places, 367 transitions, 739 flow. Second operand 3 states and 5697 transitions. [2023-09-01 05:41:03,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 679 transitions, 2711 flow [2023-09-01 05:41:03,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 679 transitions, 2711 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 05:41:03,364 INFO L231 Difference]: Finished difference. Result has 318 places, 43 transitions, 105 flow [2023-09-01 05:41:03,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3486, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=318, PETRI_TRANSITIONS=43} [2023-09-01 05:41:03,368 INFO L281 CegarLoopForPetriNet]: 333 programPoint places, -15 predicate places. [2023-09-01 05:41:03,368 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 43 transitions, 105 flow [2023-09-01 05:41:03,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1663.6666666666667) internal successors, (4991), 3 states have internal predecessors, (4991), 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 05:41:03,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:41:03,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 05:41:03,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 05:41:03,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:41:03,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:41:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1369454773, now seen corresponding path program 1 times [2023-09-01 05:41:03,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:41:03,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492519038] [2023-09-01 05:41:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:41:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:41:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:41:03,438 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 05:41:03,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:41:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492519038] [2023-09-01 05:41:03,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492519038] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 05:41:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607207314] [2023-09-01 05:41:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:41:03,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 05:41:03,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 05:41:03,451 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 05:41:03,454 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 05:41:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:41:03,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 05:41:03,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 05:41:03,701 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 05:41:03,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 05:41:03,714 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 05:41:03,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607207314] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 05:41:03,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 05:41:03,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 05:41:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873083709] [2023-09-01 05:41:03,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 05:41:03,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 05:41:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:41:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 05:41:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 05:41:03,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1656 out of 3486 [2023-09-01 05:41:03,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 43 transitions, 105 flow. Second operand has 7 states, 7 states have (on average 1657.5714285714287) internal successors, (11603), 7 states have internal predecessors, (11603), 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 05:41:03,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:41:03,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1656 of 3486 [2023-09-01 05:41:03,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:41:03,967 INFO L130 PetriNetUnfolder]: 74/202 cut-off events. [2023-09-01 05:41:03,967 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-09-01 05:41:03,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 202 events. 74/202 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 688 event pairs, 0 based on Foata normal form. 3/178 useless extension candidates. Maximal degree in co-relation 385. Up to 129 conditions per place. [2023-09-01 05:41:03,968 INFO L137 encePairwiseOnDemand]: 3482/3486 looper letters, 72 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2023-09-01 05:41:03,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 81 transitions, 345 flow [2023-09-01 05:41:03,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 05:41:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 05:41:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10018 transitions. [2023-09-01 05:41:03,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789634729393766 [2023-09-01 05:41:03,983 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 10018 transitions. [2023-09-01 05:41:03,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 10018 transitions. [2023-09-01 05:41:03,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:41:03,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 10018 transitions. [2023-09-01 05:41:04,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1669.6666666666667) internal successors, (10018), 6 states have internal predecessors, (10018), 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 05:41:04,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3486.0) internal successors, (24402), 7 states have internal predecessors, (24402), 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 05:41:04,021 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3486.0) internal successors, (24402), 7 states have internal predecessors, (24402), 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 05:41:04,021 INFO L175 Difference]: Start difference. First operand has 318 places, 43 transitions, 105 flow. Second operand 6 states and 10018 transitions. [2023-09-01 05:41:04,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 81 transitions, 345 flow [2023-09-01 05:41:04,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 81 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 05:41:04,024 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 129 flow [2023-09-01 05:41:04,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3486, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-09-01 05:41:04,025 INFO L281 CegarLoopForPetriNet]: 333 programPoint places, -287 predicate places. [2023-09-01 05:41:04,025 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 129 flow [2023-09-01 05:41:04,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1657.5714285714287) internal successors, (11603), 7 states have internal predecessors, (11603), 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 05:41:04,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:41:04,027 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 05:41:04,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 05:41:04,233 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 05:41:04,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:41:04,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:41:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1251536371, now seen corresponding path program 2 times [2023-09-01 05:41:04,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:41:04,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720137107] [2023-09-01 05:41:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:41:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:41:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:41:04,297 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:41:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:41:04,361 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:41:04,362 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:41:04,363 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:41:04,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 05:41:04,364 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-09-01 05:41:04,366 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:41:04,366 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:41:04,366 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 05:41:04,450 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 05:41:04,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1843 places, 1915 transitions, 3848 flow [2023-09-01 05:41:05,423 INFO L130 PetriNetUnfolder]: 204/4993 cut-off events. [2023-09-01 05:41:05,424 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 05:41:05,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5007 conditions, 4993 events. 204/4993 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 30494 event pairs, 0 based on Foata normal form. 0/4529 useless extension candidates. Maximal degree in co-relation 3273. Up to 9 conditions per place. [2023-09-01 05:41:05,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 1843 places, 1915 transitions, 3848 flow [2023-09-01 05:41:05,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1839 places, 1911 transitions, 3840 flow [2023-09-01 05:41:05,516 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:41:05,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1839 places, 1911 transitions, 3840 flow [2023-09-01 05:41:05,516 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1839 places, 1911 transitions, 3840 flow [2023-09-01 05:41:05,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1839 places, 1911 transitions, 3840 flow [2023-09-01 05:41:06,502 INFO L130 PetriNetUnfolder]: 204/4989 cut-off events. [2023-09-01 05:41:06,502 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 05:41:06,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5003 conditions, 4989 events. 204/4989 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 30500 event pairs, 0 based on Foata normal form. 0/4529 useless extension candidates. Maximal degree in co-relation 3269. Up to 9 conditions per place. [2023-09-01 05:41:06,869 INFO L119 LiptonReduction]: Number of co-enabled transitions 976144 [2023-09-01 05:42:21,517 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 241 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 05:42:31,122 WARN L222 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 241 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 05:42:34,852 INFO L134 LiptonReduction]: Checked pairs total: 1277254 [2023-09-01 05:42:34,852 INFO L136 LiptonReduction]: Total number of compositions: 1879 [2023-09-01 05:42:34,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:42:34,857 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@34e9743b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:42:34,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:42:34,863 INFO L130 PetriNetUnfolder]: 3/85 cut-off events. [2023-09-01 05:42:34,863 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 05:42:34,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:42:34,863 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 05:42:34,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:42:34,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:42:34,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2053354899, now seen corresponding path program 1 times [2023-09-01 05:42:34,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:42:34,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386777386] [2023-09-01 05:42:34,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:42:34,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:42:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:42:34,950 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 05:42:34,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:42:34,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386777386] [2023-09-01 05:42:34,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386777386] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 05:42:34,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 05:42:34,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 05:42:34,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715934358] [2023-09-01 05:42:34,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 05:42:34,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 05:42:34,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:42:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 05:42:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 05:42:35,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1809 out of 3794 [2023-09-01 05:42:35,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 411 transitions, 840 flow. Second operand has 3 states, 3 states have (on average 1811.0) internal successors, (5433), 3 states have internal predecessors, (5433), 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 05:42:35,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:42:35,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1809 of 3794 [2023-09-01 05:42:35,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand