./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/config/GemCutterReach.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx --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 3efee66e785ce3d2f2ce0101e78a1cdae99209fb089cd0ed9c95f4aa53c186ea --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:42:25,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:42:25,727 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/config/svcomp-Reach-32bit-GemCutter_Default.epf [2023-12-02 20:42:25,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:42:25,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:42:25,753 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:42:25,753 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:42:25,754 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:42:25,754 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:42:25,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:42:25,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 20:42:25,756 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 20:42:25,757 INFO L153 SettingsManager]: * Use SBE=true [2023-12-02 20:42:25,757 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:42:25,758 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 20:42:25,758 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:42:25,759 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:42:25,759 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:42:25,760 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:42:25,760 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 20:42:25,761 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:42:25,761 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 20:42:25,762 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:42:25,762 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 20:42:25,763 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:42:25,763 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:42:25,763 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 20:42:25,764 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:42:25,764 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:42:25,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:42:25,765 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:42:25,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:42:25,765 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 20:42:25,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-02 20:42:25,766 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2023-12-02 20:42:25,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 20:42:25,766 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:42:25,766 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2023-12-02 20:42:25,766 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 20:42:25,767 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2023-12-02 20:42:25,767 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2023-12-02 20:42:25,767 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3efee66e785ce3d2f2ce0101e78a1cdae99209fb089cd0ed9c95f4aa53c186ea [2023-12-02 20:42:25,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:42:26,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:42:26,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:42:26,018 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:42:26,019 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:42:26,021 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i [2023-12-02 20:42:28,768 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:42:28,971 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:42:28,971 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i [2023-12-02 20:42:28,985 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/data/5625e01d5/f0fcdea1e6274b7abd53500bd4bfcd45/FLAG200be7206 [2023-12-02 20:42:28,998 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/data/5625e01d5/f0fcdea1e6274b7abd53500bd4bfcd45 [2023-12-02 20:42:29,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:42:29,001 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:42:29,002 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:42:29,002 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:42:29,006 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:42:29,007 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:42:28" (1/1) ... [2023-12-02 20:42:29,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@741691a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29, skipping insertion in model container [2023-12-02 20:42:29,008 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:42:28" (1/1) ... [2023-12-02 20:42:29,052 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:42:29,344 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i[31309,31322] [2023-12-02 20:42:29,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:42:29,372 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:42:29,416 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i[31309,31322] [2023-12-02 20:42:29,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:42:29,453 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 20:42:29,454 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 20:42:29,461 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:42:29,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29 WrapperNode [2023-12-02 20:42:29,462 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:42:29,463 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:42:29,464 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:42:29,464 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:42:29,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,487 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,515 INFO L138 Inliner]: procedures = 179, calls = 49, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 189 [2023-12-02 20:42:29,516 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:42:29,517 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:42:29,517 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:42:29,517 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:42:29,527 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,531 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,532 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,548 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:42:29,553 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:42:29,554 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:42:29,554 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:42:29,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (1/1) ... [2023-12-02 20:42:29,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:42:29,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/z3 [2023-12-02 20:42:29,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:42:29,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:42:29,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 20:42:29,626 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-02 20:42:29,626 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-02 20:42:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 20:42:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 20:42:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:42:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 20:42:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 20:42:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 20:42:29,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 20:42:29,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:42:29,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:42:29,629 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 20:42:29,758 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:42:29,760 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:42:30,029 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:42:30,253 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:42:30,253 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 20:42:30,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:42:30 BoogieIcfgContainer [2023-12-02 20:42:30,254 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:42:30,257 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:42:30,257 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:42:30,260 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:42:30,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:42:28" (1/3) ... [2023-12-02 20:42:30,261 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5583a71e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:42:30, skipping insertion in model container [2023-12-02 20:42:30,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:42:29" (2/3) ... [2023-12-02 20:42:30,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5583a71e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:42:30, skipping insertion in model container [2023-12-02 20:42:30,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:42:30" (3/3) ... [2023-12-02 20:42:30,263 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-1.i [2023-12-02 20:42:30,272 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-12-02 20:42:30,282 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:42:30,282 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 20:42:30,283 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 20:42:30,335 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 20:42:30,378 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:42:30,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-12-02 20:42:30,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/z3 [2023-12-02 20:42:30,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-12-02 20:42:30,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2023-12-02 20:42:30,417 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-12-02 20:42:30,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of1ForFork0 ======== [2023-12-02 20:42:30,438 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@75dfe9a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:42:30,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 20:42:30,634 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:42:30,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:42:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1039470388, now seen corresponding path program 1 times [2023-12-02 20:42:30,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-02 20:42:30,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727263178] [2023-12-02 20:42:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:42:30,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:42:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:42:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:42:30,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-02 20:42:30,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727263178] [2023-12-02 20:42:30,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727263178] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:42:30,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:42:30,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:42:30,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343897224] [2023-12-02 20:42:30,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:42:30,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:42:30,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-02 20:42:31,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:42:31,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:42:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 20:42:31,022 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-12-02 20:42:31,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:42:31,023 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-12-02 20:42:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:42:31,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 20:42:31,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:42:31,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:42:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash 155426901, now seen corresponding path program 1 times [2023-12-02 20:42:31,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-02 20:42:31,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237442821] [2023-12-02 20:42:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:42:31,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:42:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 20:42:31,181 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 20:42:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 20:42:31,272 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-02 20:42:31,272 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 20:42:31,274 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 20:42:31,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 20:42:31,283 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-02 20:42:31,285 INFO L307 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was UNSAFE (1/2) [2023-12-02 20:42:31,289 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-12-02 20:42:31,289 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 20:42:31,335 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre15 could not be translated [2023-12-02 20:42:31,337 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch14 could not be translated [2023-12-02 20:42:31,338 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre15 could not be translated [2023-12-02 20:42:31,339 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem9 could not be translated [2023-12-02 20:42:31,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 08:42:31 BasicIcfg [2023-12-02 20:42:31,350 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 20:42:31,351 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 20:42:31,351 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 20:42:31,351 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 20:42:31,352 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:42:30" (3/4) ... [2023-12-02 20:42:31,353 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 20:42:31,375 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre15 could not be translated [2023-12-02 20:42:31,376 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch14 could not be translated [2023-12-02 20:42:31,377 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre15 could not be translated [2023-12-02 20:42:31,379 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem9 could not be translated [2023-12-02 20:42:31,430 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/witness.graphml [2023-12-02 20:42:31,431 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 20:42:31,431 INFO L158 Benchmark]: Toolchain (without parser) took 2430.39ms. Allocated memory was 153.1MB in the beginning and 184.5MB in the end (delta: 31.5MB). Free memory was 113.9MB in the beginning and 105.6MB in the end (delta: 8.2MB). Peak memory consumption was 42.7MB. Max. memory is 16.1GB. [2023-12-02 20:42:31,432 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory is still 65.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 20:42:31,432 INFO L158 Benchmark]: CACSL2BoogieTranslator took 460.66ms. Allocated memory is still 153.1MB. Free memory was 113.9MB in the beginning and 92.8MB in the end (delta: 21.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-12-02 20:42:31,432 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.80ms. Allocated memory is still 153.1MB. Free memory was 92.8MB in the beginning and 90.2MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 20:42:31,433 INFO L158 Benchmark]: Boogie Preprocessor took 35.93ms. Allocated memory is still 153.1MB. Free memory was 90.2MB in the beginning and 88.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 20:42:31,433 INFO L158 Benchmark]: RCFGBuilder took 700.93ms. Allocated memory is still 153.1MB. Free memory was 88.1MB in the beginning and 99.5MB in the end (delta: -11.3MB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. [2023-12-02 20:42:31,434 INFO L158 Benchmark]: TraceAbstraction took 1093.51ms. Allocated memory was 153.1MB in the beginning and 184.5MB in the end (delta: 31.5MB). Free memory was 98.5MB in the beginning and 115.1MB in the end (delta: -16.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 20:42:31,434 INFO L158 Benchmark]: Witness Printer took 79.89ms. Allocated memory is still 184.5MB. Free memory was 114.0MB in the beginning and 105.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-12-02 20:42:31,436 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 113.2MB. Free memory is still 65.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 460.66ms. Allocated memory is still 153.1MB. Free memory was 113.9MB in the beginning and 92.8MB in the end (delta: 21.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.80ms. Allocated memory is still 153.1MB. Free memory was 92.8MB in the beginning and 90.2MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.93ms. Allocated memory is still 153.1MB. Free memory was 90.2MB in the beginning and 88.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 700.93ms. Allocated memory is still 153.1MB. Free memory was 88.1MB in the beginning and 99.5MB in the end (delta: -11.3MB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. * TraceAbstraction took 1093.51ms. Allocated memory was 153.1MB in the beginning and 184.5MB in the end (delta: 31.5MB). Free memory was 98.5MB in the beginning and 115.1MB in the end (delta: -16.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 79.89ms. Allocated memory is still 184.5MB. Free memory was 114.0MB in the beginning and 105.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre15 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch14 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre15 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem9 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre15 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch14 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre15 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem9 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation #1 benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 252, independent: 195, independent conditional: 62, independent unconditional: 133, dependent: 56, dependent conditional: 41, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 217, independent: 195, independent conditional: 62, independent unconditional: 133, dependent: 21, dependent conditional: 6, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 217, independent: 195, independent conditional: 62, independent unconditional: 133, dependent: 21, dependent conditional: 6, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 220, independent: 195, independent conditional: 0, independent unconditional: 195, dependent: 24, dependent conditional: 3, dependent unconditional: 21, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 220, independent: 195, independent conditional: 0, independent unconditional: 195, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, independent: 195, independent conditional: 0, independent unconditional: 195, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 147, independent: 131, independent conditional: 0, independent unconditional: 131, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 147, independent: 124, independent conditional: 0, independent unconditional: 124, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 23, independent: 7, independent conditional: 0, independent unconditional: 7, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 23, independent: 7, independent conditional: 0, independent unconditional: 7, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , SemanticIndependenceRelation.Query Time [ms]: [ total: 142, independent: 52, independent conditional: 0, independent unconditional: 52, dependent: 78, dependent conditional: 0, dependent unconditional: 78, unknown: 13, unknown conditional: 0, unknown unconditional: 13] , Protected Queries: 0 ], Cache Queries: [ total: 220, independent: 64, independent conditional: 0, independent unconditional: 64, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 147, unknown conditional: 0, unknown unconditional: 147] , Statistics on independence cache: Total cache size (in pairs): 146, Positive cache size: 131, Positive conditional cache size: 0, Positive unconditional cache size: 131, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 1, Unknown conditional cache size: 0, Unknown unconditional cache size: 1, Eliminated conditions: 3, Maximal queried relation: 1, Independence queries for same thread: 35 - StatisticsResult: Persistent set benchmarks Persistent set computation time: 0.2s, Number of persistent set computation: 28, Number of trivial persistent sets: 24, Underlying independence relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 149, independent: 133, independent conditional: 0, independent unconditional: 133, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 252, independent: 195, independent conditional: 62, independent unconditional: 133, dependent: 56, dependent conditional: 41, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 217, independent: 195, independent conditional: 62, independent unconditional: 133, dependent: 21, dependent conditional: 6, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 217, independent: 195, independent conditional: 62, independent unconditional: 133, dependent: 21, dependent conditional: 6, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 220, independent: 195, independent conditional: 0, independent unconditional: 195, dependent: 24, dependent conditional: 3, dependent unconditional: 21, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 220, independent: 195, independent conditional: 0, independent unconditional: 195, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, independent: 195, independent conditional: 0, independent unconditional: 195, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 147, independent: 131, independent conditional: 0, independent unconditional: 131, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 147, independent: 124, independent conditional: 0, independent unconditional: 124, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 23, independent: 7, independent conditional: 0, independent unconditional: 7, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 23, independent: 7, independent conditional: 0, independent unconditional: 7, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , SemanticIndependenceRelation.Query Time [ms]: [ total: 142, independent: 52, independent conditional: 0, independent unconditional: 52, dependent: 78, dependent conditional: 0, dependent unconditional: 78, unknown: 13, unknown conditional: 0, unknown unconditional: 13] , Protected Queries: 0 ], Cache Queries: [ total: 220, independent: 64, independent conditional: 0, independent unconditional: 64, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 147, unknown conditional: 0, unknown unconditional: 147] , Statistics on independence cache: Total cache size (in pairs): 146, Positive cache size: 131, Positive conditional cache size: 0, Positive unconditional cache size: 131, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 1, Unknown conditional cache size: 0, Unknown unconditional cache size: 1, Eliminated conditions: 3, Maximal queried relation: 1, Independence queries for same thread: 35 - CounterExampleResult [Line: 763]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L716] 0 int memory[(2*960+1)]; [L717] 0 int next_alloc_idx = 1; [L718] 0 int m = 0; [L719] 0 int top; [L773] 0 int m2 = 0; [L774] 0 int state = 0; [L792] 0 pthread_t t; VAL [m2={5:0}, m={3:0}, next_alloc_idx=1, state=0, t={6:0}, top={4:0}] [L793] COND TRUE 0 1 [L793] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [m2={5:0}, m={3:0}, next_alloc_idx=1, state=0, t={6:0}, top={4:0}] [L777] CALL 1 __VERIFIER_atomic_acquire(&m2) [L693] EXPR 1 \read(*m) [L693] CALL 1 assume_abort_if_not(*m==0) [L4] COND FALSE 1 !(!cond) [L693] RET 1 assume_abort_if_not(*m==0) [L694] 1 *m = 1 [L777] RET 1 __VERIFIER_atomic_acquire(&m2) [L780] 1 case 0: [L781] CALL 1 EBStack_init() [L734] 1 top = 0 [L781] RET 1 EBStack_init() [L782] 1 state = 1 [L783] 1 case 1: VAL [arg={0:0}, arg={0:0}, m2={5:0}, m={3:0}, next_alloc_idx=1, state=1, top={4:0}] [L784] CALL 1 __VERIFIER_atomic_release(&m2) [L698] EXPR 1 \read(*m) [L698] CALL 1 assume_abort_if_not(*m==1) [L4] COND FALSE 1 !(!cond) [L698] RET 1 assume_abort_if_not(*m==1) [L699] 1 *m = 0 [L784] RET 1 __VERIFIER_atomic_release(&m2) [L785] CALL 1 push_loop() [L766] 1 int r = -1; [L767] 1 int arg = __VERIFIER_nondet_int(); [L768] COND TRUE 1 1 [L769] CALL, EXPR 1 push(arg) [L743] 1 int oldTop = -1, newTop = -1, casret = -1; [L744] CALL, EXPR 1 index_malloc() [L721] 1 int curr_alloc_idx = -1; VAL [curr_alloc_idx=-1, m2={5:0}, m={3:0}, next_alloc_idx=1, state=1, top={4:0}] [L722] CALL 1 __VERIFIER_atomic_acquire(&m) [L693] EXPR 1 \read(*m) [L693] CALL 1 assume_abort_if_not(*m==0) [L4] COND FALSE 1 !(!cond) [L693] RET 1 assume_abort_if_not(*m==0) [L694] 1 *m = 1 [L722] RET 1 __VERIFIER_atomic_acquire(&m) [L723] COND FALSE 1 !(next_alloc_idx+2-1 > (2*960+1)) [L727] 1 curr_alloc_idx = next_alloc_idx [L728] 1 next_alloc_idx += 2 VAL [curr_alloc_idx=1, m2={5:0}, m={3:0}, next_alloc_idx=3, state=1, top={4:0}] [L729] CALL 1 __VERIFIER_atomic_release(&m) [L698] EXPR 1 \read(*m) [L698] CALL 1 assume_abort_if_not(*m==1) [L4] COND FALSE 1 !(!cond) [L698] RET 1 assume_abort_if_not(*m==1) [L699] 1 *m = 0 [L729] RET 1 __VERIFIER_atomic_release(&m) [L731] 1 return curr_alloc_idx; [L744] RET, EXPR 1 index_malloc() [L744] 1 newTop = index_malloc() [L745] COND FALSE 1 !(newTop == 0) [L748] 1 memory[newTop+0] = d VAL [\old(d)=8, casret={7:0}, d=8, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=-1, state=1, top={4:0}] [L793] COND TRUE 0 1 [L793] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [m2={5:0}, m={3:0}, next_alloc_idx=3, state=1, t={6:0}, top={4:0}] [L749] COND TRUE 1 1 VAL [\old(d)=8, casret={7:0}, d=8, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=-1, state=1, top={4:0}] [L751] EXPR 1 \read(top) [L751] 1 oldTop = top [L753] 1 memory[newTop+1] = oldTop VAL [\old(d)=8, casret={7:0}, d=8, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=0, state=1, top={4:0}] [L754] CALL 1 __VERIFIER_atomic_CAS(&top,oldTop,newTop,&casret) [L707] EXPR 1 \read(*v) [L707] COND TRUE 1 *v == e [L709] 1 *v = u [L709] 1 *r = 1 [L754] RET 1 __VERIFIER_atomic_CAS(&top,oldTop,newTop,&casret) [L755] EXPR 1 \read(casret) VAL [\old(d)=8, casret={7:0}, d=8, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=0, state=1, top={4:0}] [L755] COND TRUE 1 casret==1 [L756] 1 return 1; [L743] 1 int oldTop = -1, newTop = -1, casret = -1; [L756] 1 return 1; VAL [\old(d)=8, \result=1, d=8, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=0, state=1, top={4:0}] [L769] RET, EXPR 1 push(arg) [L769] 1 r = push(arg) [L770] CALL 1 __VERIFIER_atomic_assert(r) [L763] EXPR 1 !r || !isEmpty() [L763] CALL, EXPR 1 isEmpty() [L737] EXPR 1 \read(top) [L737] COND FALSE 1 !(top == 0) [L740] 1 return 0; [L763] RET, EXPR 1 isEmpty() [L763] EXPR 1 !r || !isEmpty() [L763] COND TRUE 1 !(!(!r || !isEmpty())) [L763] 1 reach_error() VAL [\old(r)=1, m2={5:0}, m={3:0}, next_alloc_idx=3, r=1, state=1, top={4:0}] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr1Thread1of1ForFork0 with 1 thread instances CFG has 3 procedures, 56 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.3s, 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: 3, 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 2/2 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 RESULT: Ultimate proved your program to be incorrect! [2023-12-02 20:42:31,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2023-12-02 20:42:31,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b0206df-50d7-4261-a25a-ad08f1f778e7/bin/ugemcutter-verify-Bi2udmvEmx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE