./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/config/GemCutterReach.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL --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 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 12:15:24,920 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 12:15:24,999 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/config/svcomp-Reach-32bit-GemCutter_Default.epf [2024-11-08 12:15:25,004 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 12:15:25,005 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 12:15:25,028 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 12:15:25,029 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 12:15:25,029 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 12:15:25,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 12:15:25,030 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 12:15:25,031 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 12:15:25,032 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 12:15:25,032 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 12:15:25,033 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 12:15:25,033 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 12:15:25,033 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 12:15:25,034 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 12:15:25,034 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 12:15:25,035 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 12:15:25,035 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 12:15:25,035 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 12:15:25,039 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 12:15:25,040 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 12:15:25,040 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 12:15:25,040 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 12:15:25,041 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 12:15:25,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 12:15:25,041 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 12:15:25,042 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 12:15:25,042 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 12:15:25,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-08 12:15:25,047 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 12:15:25,047 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 12:15:25,047 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 12:15:25,048 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 12:15:25,048 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2024-11-08 12:15:25,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 12:15:25,048 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 12:15:25,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2024-11-08 12:15:25,049 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2024-11-08 12:15:25,049 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2024-11-08 12:15:25,051 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_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 [2024-11-08 12:15:25,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 12:15:25,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 12:15:25,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 12:15:25,368 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 12:15:25,368 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 12:15:25,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i Unable to find full path for "g++" [2024-11-08 12:15:27,389 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 12:15:27,639 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 12:15:27,639 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2024-11-08 12:15:27,659 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/data/d7cbf71c1/9126d9baaee940c9af8fc629cd928097/FLAGd53ac75c9 [2024-11-08 12:15:27,964 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/data/d7cbf71c1/9126d9baaee940c9af8fc629cd928097 [2024-11-08 12:15:27,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 12:15:27,968 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 12:15:27,970 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 12:15:27,970 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 12:15:27,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 12:15:27,977 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 12:15:27" (1/1) ... [2024-11-08 12:15:27,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5e2874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:27, skipping insertion in model container [2024-11-08 12:15:27,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 12:15:27" (1/1) ... [2024-11-08 12:15:28,032 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 12:15:28,510 WARN L250 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_3ffd4455-b468-4b7f-8139-5f4e287087a0/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31306,31319] [2024-11-08 12:15:28,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 12:15:28,619 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 12:15:28,661 WARN L250 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_3ffd4455-b468-4b7f-8139-5f4e287087a0/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31306,31319] [2024-11-08 12:15:28,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 12:15:28,734 INFO L204 MainTranslator]: Completed translation [2024-11-08 12:15:28,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28 WrapperNode [2024-11-08 12:15:28,735 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 12:15:28,736 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 12:15:28,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 12:15:28,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 12:15:28,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:28,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:28,867 INFO L138 Inliner]: procedures = 179, calls = 46, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 2105 [2024-11-08 12:15:28,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 12:15:28,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 12:15:28,870 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 12:15:28,870 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 12:15:28,885 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:28,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:28,905 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:28,905 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:28,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:28,971 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:28,979 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:28,994 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:29,015 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 12:15:29,016 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 12:15:29,016 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 12:15:29,016 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 12:15:29,017 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 12:15:28" (1/1) ... [2024-11-08 12:15:29,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-08 12:15:29,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/z3 [2024-11-08 12:15:29,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-08 12:15:29,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffd4455-b468-4b7f-8139-5f4e287087a0/bin/ugemcutter-verify-v6A4Riy6iL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-08 12:15:29,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-08 12:15:29,090 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-08 12:15:29,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-08 12:15:29,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-08 12:15:29,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 12:15:29,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 12:15:29,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 12:15:29,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 12:15:29,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-08 12:15:29,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 12:15:29,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 12:15:29,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 12:15:29,094 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 12:15:29,244 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 12:15:29,246 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 12:15:31,482 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 12:15:31,483 INFO L287 CfgBuilder]: Performing block encoding