./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/bounded_buffer.i --full-output --traceabstraction.use.conditional.por.in.concurrent.analysis false --traceabstraction.commutativity.condition.synthesis NONE --traceabstraction.partial.order.reduction.in.concurrent.analysis PERSISTENT_SETS --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6f232940 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../sv-benchmarks/c/pthread-complex/bounded_buffer.i -s /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 --traceabstraction.use.conditional.por.in.concurrent.analysis false --traceabstraction.commutativity.condition.synthesis NONE --traceabstraction.partial.order.reduction.in.concurrent.analysis PERSISTENT_SETS --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6f23294-m [2025-03-20 00:56:38,300 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-20 00:56:38,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2025-03-20 00:56:38,375 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-20 00:56:38,376 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-20 00:56:38,399 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-20 00:56:38,400 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-20 00:56:38,400 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-20 00:56:38,400 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-20 00:56:38,400 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-20 00:56:38,401 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-20 00:56:38,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-20 00:56:38,401 INFO L153 SettingsManager]: * Use SBE=true [2025-03-20 00:56:38,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-20 00:56:38,402 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-03-20 00:56:38,402 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-20 00:56:38,402 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-20 00:56:38,403 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-03-20 00:56:38,403 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-20 00:56:38,403 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-20 00:56:38,403 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-03-20 00:56:38,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-20 00:56:38,403 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-03-20 00:56:38,403 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-03-20 00:56:38,403 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-03-20 00:56:38,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/UGemCutter-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter 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 -> 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use conditional POR in concurrent analysis -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Commutativity condition synthesis -> NONE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Partial Order Reduction in concurrent analysis -> PERSISTENT_SETS [2025-03-20 00:56:38,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-20 00:56:38,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-20 00:56:38,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-20 00:56:38,661 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-20 00:56:38,661 INFO L274 PluginConnector]: CDTParser initialized [2025-03-20 00:56:38,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../sv-benchmarks/c/pthread-complex/bounded_buffer.i [2025-03-20 00:56:39,906 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/588ef44b9/ce27ffd053f84be08d31ae9376628992/FLAGe6c05f542 [2025-03-20 00:56:40,173 INFO L389 CDTParser]: Found 1 translation units. [2025-03-20 00:56:40,176 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i [2025-03-20 00:56:40,195 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/588ef44b9/ce27ffd053f84be08d31ae9376628992/FLAGe6c05f542 [2025-03-20 00:56:41,108 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/588ef44b9/ce27ffd053f84be08d31ae9376628992 [2025-03-20 00:56:41,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-20 00:56:41,110 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-20 00:56:41,111 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-20 00:56:41,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-20 00:56:41,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-20 00:56:41,114 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dcb2e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41, skipping insertion in model container [2025-03-20 00:56:41,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,142 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-20 00:56:41,586 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2025-03-20 00:56:41,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-20 00:56:41,630 INFO L200 MainTranslator]: Completed pre-run [2025-03-20 00:56:41,713 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2025-03-20 00:56:41,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-20 00:56:41,806 INFO L204 MainTranslator]: Completed translation [2025-03-20 00:56:41,806 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41 WrapperNode [2025-03-20 00:56:41,806 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-20 00:56:41,807 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-20 00:56:41,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-20 00:56:41,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-20 00:56:41,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,831 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,864 INFO L138 Inliner]: procedures = 429, calls = 134, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 450 [2025-03-20 00:56:41,867 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-20 00:56:41,868 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-20 00:56:41,868 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-20 00:56:41,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-20 00:56:41,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,877 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,878 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,892 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,893 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,895 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,901 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,902 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,907 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-20 00:56:41,908 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-03-20 00:56:41,909 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-03-20 00:56:41,909 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-03-20 00:56:41,909 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (1/1) ... [2025-03-20 00:56:41,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-03-20 00:56:41,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-03-20 00:56:41,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2025-03-20 00:56:41,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2025-03-20 00:56:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure producer_routine [2025-03-20 00:56:41,953 INFO L138 BoogieDeclarations]: Found implementation of procedure producer_routine [2025-03-20 00:56:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-20 00:56:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2025-03-20 00:56:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-20 00:56:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-20 00:56:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-20 00:56:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2025-03-20 00:56:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-20 00:56:41,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-20 00:56:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-20 00:56:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2025-03-20 00:56:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure consumer_routine [2025-03-20 00:56:41,955 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer_routine [2025-03-20 00:56:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-20 00:56:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2025-03-20 00:56:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-03-20 00:56:41,956 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-20 00:56:42,083 INFO L234 CfgBuilder]: Building ICFG [2025-03-20 00:56:42,084 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-20 00:56:42,569 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-20 00:56:42,569 INFO L283 CfgBuilder]: Performing block encoding [2025-03-20 00:56:42,864 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-20 00:56:42,864 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2025-03-20 00:56:42,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:56:42 BoogieIcfgContainer [2025-03-20 00:56:42,865 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-03-20 00:56:42,866 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-20 00:56:42,866 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-20 00:56:42,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-20 00:56:42,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:56:41" (1/3) ... [2025-03-20 00:56:42,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6652a96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:56:42, skipping insertion in model container [2025-03-20 00:56:42,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:41" (2/3) ... [2025-03-20 00:56:42,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6652a96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:56:42, skipping insertion in model container [2025-03-20 00:56:42,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:56:42" (3/3) ... [2025-03-20 00:56:42,871 INFO L128 eAbstractionObserver]: Analyzing ICFG bounded_buffer.i [2025-03-20 00:56:42,881 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-20 00:56:42,882 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bounded_buffer.i that has 3 procedures, 81 locations, 110 edges, 1 initial locations, 13 loop locations, and 3 error locations. [2025-03-20 00:56:42,882 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-20 00:56:42,950 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-20 00:56:42,976 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-20 00:56:42,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-03-20 00:56:42,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-03-20 00:56:42,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2025-03-20 00:56:42,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2025-03-20 00:56:43,070 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-03-20 00:56:43,078 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == producer_routineThread1of1ForFork0 ======== [2025-03-20 00:56:43,083 INFO L340 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, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@406e3880, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-20 00:56:43,083 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-20 00:56:44,650 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting producer_routineErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE === [producer_routineErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE] === [2025-03-20 00:56:44,655 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-03-20 00:56:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash -324897801, now seen corresponding path program 1 times [2025-03-20 00:56:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-20 00:56:44,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758426390] [2025-03-20 00:56:44,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-20 00:56:44,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-20 00:56:44,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-20 00:56:44,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-20 00:56:44,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-20 00:56:44,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-20 00:56:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-20 00:56:45,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-20 00:56:45,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758426390] [2025-03-20 00:56:45,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758426390] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-20 00:56:45,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-20 00:56:45,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-20 00:56:45,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344480866] [2025-03-20 00:56:45,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-20 00:56:45,029 INFO L557 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-20 00:56:45,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-20 00:56:45,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-20 00:56:45,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-20 00:56:45,043 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-20 00:56:45,044 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-03-20 00:56:45,046 INFO L481 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2025-03-20 00:56:45,046 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-03-20 01:05:50,143 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-20 01:05:50,143 WARN L461 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-20 01:05:50,143 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting producer_routineErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE === [producer_routineErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE] === [2025-03-20 01:05:50,144 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-03-20 01:05:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1900120862, now seen corresponding path program 1 times [2025-03-20 01:05:50,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-20 01:05:50,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871082946] [2025-03-20 01:05:50,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-20 01:05:50,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-20 01:05:50,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-20 01:05:50,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-20 01:05:50,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-20 01:05:50,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-20 01:05:50,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287466939] [2025-03-20 01:05:50,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-20 01:05:50,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-20 01:05:50,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-03-20 01:05:50,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-20 01:05:50,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-20 01:05:50,477 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-20 01:05:51,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-20 01:05:51,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-20 01:05:51,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-20 01:05:51,296 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-20 01:05:51,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-20 01:05:52,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-20 01:05:52,648 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-20 01:05:52,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-20 01:05:52,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-20 01:05:52,707 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-20 01:05:52,708 INFO L791 garLoopResultBuilder]: Registering result UNSAFE for location producer_routineErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE (0 of 1 remaining) [2025-03-20 01:05:52,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-20 01:05:52,910 WARN L461 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2025-03-20 01:05:52,913 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-03-20 01:05:52,914 INFO L320 ceAbstractionStarter]: Result for error location producer_routineThread1of1ForFork0 was UNSAFE (1/3) [2025-03-20 01:05:52,957 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-20 01:05:52,957 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-03-20 01:05:53,159 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forcibly destroying the process [2025-03-20 01:05:53,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 137 [2025-03-20 01:05:53,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 01:05:53 BasicIcfg [2025-03-20 01:05:53,358 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-20 01:05:53,360 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-20 01:05:53,360 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-20 01:05:53,360 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-20 01:05:53,362 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:56:42" (3/4) ... [2025-03-20 01:05:53,364 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-20 01:05:53,364 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-20 01:05:53,365 INFO L158 Benchmark]: Toolchain (without parser) took 552254.67ms. Allocated memory was 117.4MB in the beginning and 285.2MB in the end (delta: 167.8MB). Free memory was 89.1MB in the beginning and 208.4MB in the end (delta: -119.3MB). Peak memory consumption was 51.1MB. Max. memory is 16.1GB. [2025-03-20 01:05:53,365 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory is still 61.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-20 01:05:53,365 INFO L158 Benchmark]: CACSL2BoogieTranslator took 695.38ms. Allocated memory is still 117.4MB. Free memory was 88.9MB in the beginning and 85.4MB in the end (delta: 3.5MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. [2025-03-20 01:05:53,365 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.71ms. Allocated memory is still 117.4MB. Free memory was 85.4MB in the beginning and 80.9MB in the end (delta: 4.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-20 01:05:53,366 INFO L158 Benchmark]: Boogie Preprocessor took 39.40ms. Allocated memory is still 117.4MB. Free memory was 80.9MB in the beginning and 77.8MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-20 01:05:53,366 INFO L158 Benchmark]: RCFGBuilder took 957.17ms. Allocated memory is still 117.4MB. Free memory was 77.8MB in the beginning and 70.0MB in the end (delta: 7.9MB). Peak memory consumption was 47.0MB. Max. memory is 16.1GB. [2025-03-20 01:05:53,367 INFO L158 Benchmark]: TraceAbstraction took 550492.08ms. Allocated memory was 117.4MB in the beginning and 285.2MB in the end (delta: 167.8MB). Free memory was 69.2MB in the beginning and 208.4MB in the end (delta: -139.2MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. [2025-03-20 01:05:53,368 INFO L158 Benchmark]: Witness Printer took 4.87ms. Allocated memory is still 285.2MB. Free memory was 208.4MB in the beginning and 208.4MB in the end (delta: 11.2kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-20 01:05:53,368 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory is still 61.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 695.38ms. Allocated memory is still 117.4MB. Free memory was 88.9MB in the beginning and 85.4MB in the end (delta: 3.5MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.71ms. Allocated memory is still 117.4MB. Free memory was 85.4MB in the beginning and 80.9MB in the end (delta: 4.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.40ms. Allocated memory is still 117.4MB. Free memory was 80.9MB in the beginning and 77.8MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 957.17ms. Allocated memory is still 117.4MB. Free memory was 77.8MB in the beginning and 70.0MB in the end (delta: 7.9MB). Peak memory consumption was 47.0MB. Max. memory is 16.1GB. * TraceAbstraction took 550492.08ms. Allocated memory was 117.4MB in the beginning and 285.2MB in the end (delta: 167.8MB). Free memory was 69.2MB in the beginning and 208.4MB in the end (delta: -139.2MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. * Witness Printer took 4.87ms. Allocated memory is still 285.2MB. Free memory was 208.4MB in the beginning and 208.4MB in the end (delta: 11.2kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Partial order reduction statistics Independence relation #1 benchmarks: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 953, independent: 933, independent conditional: 0, independent unconditional: 933, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 953, independent: 933, independent conditional: 0, independent unconditional: 933, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 928, independent: 908, independent conditional: 0, independent unconditional: 908, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 928, independent: 904, independent conditional: 0, independent unconditional: 904, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 24, independent: 4, independent conditional: 0, independent unconditional: 4, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 24, independent: 4, independent conditional: 0, independent unconditional: 4, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , SemanticIndependenceRelation.Query Time [ms]: [ total: 546340, independent: 58, independent conditional: 0, independent unconditional: 58, dependent: 2492, dependent conditional: 0, dependent unconditional: 2492, unknown: 543790, unknown conditional: 0, unknown unconditional: 543790] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 953, independent: 25, independent conditional: 0, independent unconditional: 25, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 928, unknown conditional: 0, unknown unconditional: 928] , Statistics on independence cache: Total cache size (in pairs): 928, Positive cache size: 908, Positive conditional cache size: 0, Positive unconditional cache size: 908, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 3, Unknown conditional cache size: 0, Unknown unconditional cache size: 3, Independence queries for same thread: 0, Persistent sets #1 benchmarks: Persistent set computation time: 546.4s, Number of persistent set computation: 18, Number of trivial persistent sets: 14, Underlying independence relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 953, independent: 933, independent conditional: 0, independent unconditional: 933, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 953, independent: 933, independent conditional: 0, independent unconditional: 933, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 928, independent: 908, independent conditional: 0, independent unconditional: 908, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 928, independent: 904, independent conditional: 0, independent unconditional: 904, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 24, independent: 4, independent conditional: 0, independent unconditional: 4, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 24, independent: 4, independent conditional: 0, independent unconditional: 4, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , SemanticIndependenceRelation.Query Time [ms]: [ total: 546340, independent: 58, independent conditional: 0, independent unconditional: 58, dependent: 2492, dependent conditional: 0, dependent unconditional: 2492, unknown: 543790, unknown conditional: 0, unknown unconditional: 543790] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 953, independent: 25, independent conditional: 0, independent unconditional: 25, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 928, unknown conditional: 0, unknown unconditional: 928] , Statistics on independence cache: Total cache size (in pairs): 928, Positive cache size: 908, Positive conditional cache size: 0, Positive unconditional cache size: 908, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 3, Unknown conditional cache size: 0, Unknown unconditional cache size: 3, Independence queries for same thread: 0 - UnprovableResult [Line: 1636]: Unable to prove that there are no unsupported features in the program Unable to prove that there are no unsupported features in the program Reason: overapproximation of fflush at line 1636. Possible FailurePath: [L1663] 0 thread_t producers[2]; [L1664] 0 thread_t consumers[2]; [L1665] 0 int i; [L1666] 0 bounded_buf_t buffer; [L1667] CALL 0 bounded_buf_init(&buffer, 3) [L1452] 0 int status = 0; [L1453] COND FALSE 0 !(bbuf == ((void *)0)) [L1454] 0 bbuf->valid = 0xACDEFA [L1455] 0 status = pthread_mutex_init(&bbuf->mutex, ((void *)0)) [L1456] COND FALSE 0 !(status != 0) [L1457] 0 status = pthread_cond_init(&bbuf->not_full, ((void *)0)) [L1458] COND FALSE 0 !(status != 0) [L1463] 0 status = pthread_cond_init(&bbuf->not_empty, ((void *)0)) [L1464] COND FALSE 0 !(status != 0) [L1470] 0 bbuf->item_num = 0 [L1471] 0 bbuf->max_size = sz [L1472] 0 bbuf->head = 0 [L1473] 0 bbuf->rear = 0 [L1474] EXPR, FCALL 0 calloc( sz, sizeof(void*) ) [L1474] 0 bbuf->buf = calloc( sz, sizeof(void*) ) [L1475] EXPR 0 bbuf->buf [L1475] COND FALSE 0 !(bbuf->buf == ((void *)0)) [L1482] 0 bbuf->head = 0 [L1483] 0 bbuf->rear = 0 [L1484] 0 bbuf->p_wait = 0 [L1485] 0 bbuf->c_wait = 0 [L1486] 0 return 0; [L1667] RET 0 bounded_buf_init(&buffer, 3) [L1668] 0 i = 0 VAL [buffer={7:0}, consumers={5:0}, i=0, producers={6:0}] [L1668] COND TRUE 0 i < 2 [L1670] 0 producers[i].id = i [L1671] 0 producers[i].bbuf = &buffer [L1672] FCALL, FORK 0 pthread_create(&producers[i].pid, ((void *)0), producer_routine, (void*)&producers[i]) VAL [buffer={7:0}, consumers={5:0}, i=0, producers={6:0}] [L1623] 1 thread_t * thread = (thread_t*) arg; [L1624] 1 int i, temp; [L1625] 1 int ch; [L1626] 1 int status = 0; [L1627] 1 i = 0 VAL [\at(arg, Pre)={6:0}, arg={6:0}, i=0, status=0, thread={6:0}] [L1668] 0 i++ VAL [buffer={7:0}, consumers={5:0}, i=1, producers={6:0}] [L1627] COND TRUE 1 i < 4 [L1629] 1 ch = __VERIFIER_nondet_int() [L1630] 1 temp = ch [L1631] EXPR 1 thread->bbuf [L1631] CALL, EXPR 1 bounded_buf_put(thread->bbuf, (void*)((int)temp)) [L1526] 1 int status = 0, status1 = 0, status2 = 0; [L1527] 1 bbuf == ((void *)0) || bbuf->valid != 0xACDEFA [L1527] EXPR 1 bbuf->valid [L1527] 1 bbuf == ((void *)0) || bbuf->valid != 0xACDEFA VAL [\at(bbuf, Pre)={7:0}, \at(item, Pre)={0:11329275}, bbuf={7:0}, item={0:11329275}, status1=0, status2=0, status=0] [L1527] COND FALSE 1 !(bbuf == ((void *)0) || bbuf->valid != 0xACDEFA) [L1529] 1 status = pthread_mutex_lock(&bbuf->mutex) [L1531] COND FALSE 1 !(status != 0) [L1532] EXPR 1 bbuf->rear [L1532] EXPR 1 bbuf->max_size [L1532] EXPR 1 bbuf->head VAL [\at(bbuf, Pre)={7:0}, \at(item, Pre)={0:11329275}, bbuf={7:0}, item={0:11329275}, status1=0, status2=0, status=0] [L1532] COND FALSE 1 !((bbuf->rear + 1)% bbuf->max_size == bbuf->head) [L1542] COND TRUE 1 status == 0 [L1543] EXPR 1 bbuf->buf [L1543] EXPR 1 bbuf->rear [L1543] 1 bbuf->buf[bbuf->rear]= item [L1544] EXPR 1 bbuf->rear [L1544] EXPR 1 bbuf->max_size [L1544] 1 bbuf->rear = (bbuf->rear+1)% (bbuf->max_size) [L1545] EXPR 1 bbuf->c_wait [L1545] COND FALSE 1 !(bbuf->c_wait > 0) [L1551] 1 status2 = pthread_mutex_unlock(&bbuf->mutex) [L1552] 1 return (status == 0)? status2 : status; VAL [\at(bbuf, Pre)={7:0}, \at(item, Pre)={0:11329275}, \result=0, bbuf={7:0}, item={0:11329275}, status1=0, status2=0, status=0] [L1631] RET, EXPR 1 bounded_buf_put(thread->bbuf, (void*)((int)temp)) [L1631] 1 status = bounded_buf_put(thread->bbuf, (void*)((int)temp)) [L1632] COND FALSE 1 !(status != 0) VAL [\at(arg, Pre)={6:0}, arg={6:0}, ch=11329275, i=0, status=0, temp=11329275, thread={6:0}] [L1636] 1 fflush(stdout) VAL [\at(arg, Pre)={6:0}, arg={6:0}, ch=11329275, i=0, status=0, temp=11329275, thread={6:0}] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: producer_routineThread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 133 locations, 184 edges, 8 error locations. Started 1 CEGAR loops. OverallTime: 549.9s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 546.7s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-03-20 01:05:53,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../sv-benchmarks/c/pthread-complex/bounded_buffer.i -s /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 --traceabstraction.use.conditional.por.in.concurrent.analysis false --traceabstraction.commutativity.condition.synthesis NONE --traceabstraction.partial.order.reduction.in.concurrent.analysis PERSISTENT_SETS --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6f23294-m [2025-03-20 01:05:55,030 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-20 01:05:55,106 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Bitvector.epf [2025-03-20 01:05:55,110 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-20 01:05:55,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-20 01:05:55,135 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-20 01:05:55,136 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-20 01:05:55,137 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-20 01:05:55,137 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-20 01:05:55,137 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-20 01:05:55,138 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-20 01:05:55,138 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-20 01:05:55,138 INFO L153 SettingsManager]: * Use SBE=true [2025-03-20 01:05:55,138 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-20 01:05:55,138 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-20 01:05:55,138 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-20 01:05:55,139 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-20 01:05:55,139 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-20 01:05:55,139 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-20 01:05:55,139 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-20 01:05:55,139 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-20 01:05:55,139 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-20 01:05:55,139 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-20 01:05:55,139 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-20 01:05:55,139 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-20 01:05:55,140 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-20 01:05:55,140 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-20 01:05:55,140 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-03-20 01:05:55,140 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-20 01:05:55,140 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-20 01:05:55,140 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-20 01:05:55,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-03-20 01:05:55,140 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-20 01:05:55,140 INFO L153 SettingsManager]: * Refinement strategy for commutativity condition synthesis=FOX [2025-03-20 01:05:55,140 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-20 01:05:55,141 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-20 01:05:55,141 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-03-20 01:05:55,141 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-20 01:05:55,141 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-20 01:05:55,141 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-03-20 01:05:55,141 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-20 01:05:55,141 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-03-20 01:05:55,141 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-03-20 01:05:55,141 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-03-20 01:05:55,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/UGemCutter-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter 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 -> 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use conditional POR in concurrent analysis -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Commutativity condition synthesis -> NONE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Partial Order Reduction in concurrent analysis -> PERSISTENT_SETS [2025-03-20 01:05:55,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-20 01:05:55,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-20 01:05:55,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-20 01:05:55,374 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-20 01:05:55,374 INFO L274 PluginConnector]: CDTParser initialized [2025-03-20 01:05:55,375 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../sv-benchmarks/c/pthread-complex/bounded_buffer.i [2025-03-20 01:05:56,649 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/31d45223b/86faa706383641919ba465eeb9b69967/FLAGe0d7b7846 [2025-03-20 01:05:56,883 INFO L389 CDTParser]: Found 1 translation units. [2025-03-20 01:05:56,883 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i [2025-03-20 01:05:56,905 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/31d45223b/86faa706383641919ba465eeb9b69967/FLAGe0d7b7846 [2025-03-20 01:05:57,651 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/31d45223b/86faa706383641919ba465eeb9b69967 [2025-03-20 01:05:57,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-20 01:05:57,653 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-20 01:05:57,654 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-20 01:05:57,654 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-20 01:05:57,657 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-20 01:05:57,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:05:57" (1/1) ... [2025-03-20 01:05:57,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b041be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:57, skipping insertion in model container [2025-03-20 01:05:57,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:05:57" (1/1) ... [2025-03-20 01:05:57,693 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-20 01:05:58,090 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2025-03-20 01:05:58,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-20 01:05:58,138 INFO L200 MainTranslator]: Completed pre-run [2025-03-20 01:05:58,198 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2025-03-20 01:05:58,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-20 01:05:58,292 INFO L204 MainTranslator]: Completed translation [2025-03-20 01:05:58,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58 WrapperNode [2025-03-20 01:05:58,293 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-20 01:05:58,294 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-20 01:05:58,294 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-20 01:05:58,294 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-20 01:05:58,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,322 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,351 INFO L138 Inliner]: procedures = 432, calls = 134, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 446 [2025-03-20 01:05:58,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-20 01:05:58,351 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-20 01:05:58,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-20 01:05:58,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-20 01:05:58,357 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,357 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,366 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,366 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,385 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,389 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,392 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,404 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,407 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-20 01:05:58,412 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-03-20 01:05:58,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-03-20 01:05:58,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-03-20 01:05:58,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (1/1) ... [2025-03-20 01:05:58,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-03-20 01:05:58,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-03-20 01:05:58,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2025-03-20 01:05:58,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2025-03-20 01:05:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure producer_routine [2025-03-20 01:05:58,459 INFO L138 BoogieDeclarations]: Found implementation of procedure producer_routine [2025-03-20 01:05:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-20 01:05:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2025-03-20 01:05:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-20 01:05:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-20 01:05:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-20 01:05:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2025-03-20 01:05:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-20 01:05:58,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-20 01:05:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2025-03-20 01:05:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-20 01:05:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2025-03-20 01:05:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure consumer_routine [2025-03-20 01:05:58,460 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer_routine [2025-03-20 01:05:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2025-03-20 01:05:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-20 01:05:58,462 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-20 01:05:58,630 INFO L234 CfgBuilder]: Building ICFG [2025-03-20 01:05:58,632 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-20 01:05:59,292 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-20 01:05:59,292 INFO L283 CfgBuilder]: Performing block encoding [2025-03-20 01:05:59,580 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-20 01:05:59,580 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2025-03-20 01:05:59,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:05:59 BoogieIcfgContainer [2025-03-20 01:05:59,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-03-20 01:05:59,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-20 01:05:59,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-20 01:05:59,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-20 01:05:59,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:05:57" (1/3) ... [2025-03-20 01:05:59,585 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6a7184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:05:59, skipping insertion in model container [2025-03-20 01:05:59,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:05:58" (2/3) ... [2025-03-20 01:05:59,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6a7184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:05:59, skipping insertion in model container [2025-03-20 01:05:59,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:05:59" (3/3) ... [2025-03-20 01:05:59,586 INFO L128 eAbstractionObserver]: Analyzing ICFG bounded_buffer.i [2025-03-20 01:05:59,600 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-20 01:05:59,601 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bounded_buffer.i that has 3 procedures, 81 locations, 110 edges, 1 initial locations, 13 loop locations, and 3 error locations. [2025-03-20 01:05:59,601 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-20 01:05:59,687 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-20 01:05:59,713 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-20 01:05:59,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-03-20 01:05:59,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-03-20 01:05:59,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2025-03-20 01:05:59,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2025-03-20 01:05:59,801 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-03-20 01:05:59,809 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2025-03-20 01:05:59,815 INFO L340 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, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@10f6a047, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-20 01:05:59,815 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-03-20 01:06:03,403 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-20 01:06:03,407 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-03-20 01:06:03,407 INFO L85 PathProgramCache]: Analyzing trace with hash -953923077, now seen corresponding path program 1 times [2025-03-20 01:06:03,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-20 01:06:03,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132390021] [2025-03-20 01:06:03,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-20 01:06:03,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-20 01:06:03,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-03-20 01:06:03,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-20 01:06:03,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-20 01:06:03,557 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-20 01:06:03,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-20 01:06:03,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-20 01:06:03,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-20 01:06:03,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-20 01:06:03,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-20 01:06:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-20 01:06:03,603 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-20 01:06:03,604 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-20 01:06:03,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132390021] [2025-03-20 01:06:03,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132390021] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-20 01:06:03,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-20 01:06:03,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-20 01:06:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671871250] [2025-03-20 01:06:03,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-20 01:06:03,608 INFO L557 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-20 01:06:03,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-20 01:06:03,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-20 01:06:03,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-20 01:06:03,621 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-20 01:06:03,622 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-03-20 01:06:03,623 INFO L481 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2025-03-20 01:06:03,623 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-03-20 01:06:05,633 WARN L538 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-20 01:06:08,463 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-20 01:06:08,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-20 01:06:08,664 WARN L461 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-20 01:06:08,665 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-20 01:06:08,665 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-03-20 01:06:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash 186947282, now seen corresponding path program 1 times [2025-03-20 01:06:08,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-20 01:06:08,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320046411] [2025-03-20 01:06:08,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-20 01:06:08,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-20 01:06:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-03-20 01:06:08,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-20 01:06:08,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-20 01:06:08,775 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-20 01:06:08,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-20 01:06:08,802 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-20 01:06:08,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-20 01:06:08,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-20 01:06:08,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-20 01:06:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-20 01:06:08,822 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-20 01:06:08,822 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-20 01:06:08,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320046411] [2025-03-20 01:06:08,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320046411] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-20 01:06:08,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-20 01:06:08,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-20 01:06:08,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328182319] [2025-03-20 01:06:08,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-20 01:06:08,823 INFO L557 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-20 01:06:08,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-20 01:06:08,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-20 01:06:08,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-20 01:06:08,823 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-20 01:06:08,823 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-03-20 01:06:08,824 INFO L481 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2025-03-20 01:06:08,824 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-03-20 01:06:08,824 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-03-20 01:06:10,830 WARN L538 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-20 01:06:12,836 WARN L538 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-20 01:06:13,952 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-20 01:06:13,952 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-20 01:06:13,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-20 01:06:14,153 WARN L461 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-20 01:06:14,153 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-20 01:06:14,154 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-03-20 01:06:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash 399327583, now seen corresponding path program 1 times [2025-03-20 01:06:14,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-20 01:06:14,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218082420] [2025-03-20 01:06:14,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-20 01:06:14,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-20 01:06:14,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-03-20 01:06:14,156 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-20 01:06:14,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-20 01:06:14,273 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-20 01:06:14,302 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-20 01:06:14,302 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-20 01:06:14,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-20 01:06:14,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-20 01:06:14,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-20 01:06:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-20 01:06:14,333 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-20 01:06:14,333 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-20 01:06:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218082420] [2025-03-20 01:06:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218082420] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-20 01:06:14,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-20 01:06:14,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-20 01:06:14,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310629339] [2025-03-20 01:06:14,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-20 01:06:14,333 INFO L557 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-20 01:06:14,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-20 01:06:14,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-20 01:06:14,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-20 01:06:14,334 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-20 01:06:14,334 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-03-20 01:06:14,334 INFO L481 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2025-03-20 01:06:14,334 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-03-20 01:06:14,334 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-03-20 01:06:14,334 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-03-20 01:06:16,349 WARN L538 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-20 01:06:18,355 WARN L538 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-20 01:06:20,360 WARN L538 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15