./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 f8ab0bd5 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:27:36,463 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:27:36,516 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:27:36,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:27:36,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:27:36,542 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:27:36,543 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:27:36,544 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:27:36,544 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:27:36,544 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:27:36,545 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:27:36,545 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:27:36,545 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:27:36,545 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:27:36,545 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:27:36,546 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:27:36,546 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:27:36,546 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:27:36,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:27:36,547 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 [2025-03-13 21:27:36,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:27:36,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:27:36,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:27:36,796 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:27:36,796 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:27:36,798 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2025-03-13 21:27:37,950 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30523d9e6/7c67cc4ec17042f58cc49e5824d5f019/FLAGa0607e785 [2025-03-13 21:27:38,262 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:27:38,264 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2025-03-13 21:27:38,277 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30523d9e6/7c67cc4ec17042f58cc49e5824d5f019/FLAGa0607e785 [2025-03-13 21:27:38,294 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30523d9e6/7c67cc4ec17042f58cc49e5824d5f019 [2025-03-13 21:27:38,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:27:38,297 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:27:38,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:27:38,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:27:38,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:27:38,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1656868f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38, skipping insertion in model container [2025-03-13 21:27:38,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,335 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:27:38,587 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-ext/26_stack_cas_longest-2.i[31306,31319] [2025-03-13 21:27:38,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:27:38,653 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:27:38,683 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-ext/26_stack_cas_longest-2.i[31306,31319] [2025-03-13 21:27:38,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:27:38,740 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:27:38,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38 WrapperNode [2025-03-13 21:27:38,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:27:38,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:27:38,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:27:38,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:27:38,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,816 INFO L138 Inliner]: procedures = 179, calls = 46, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 2099 [2025-03-13 21:27:38,816 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:27:38,816 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:27:38,817 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:27:38,817 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:27:38,824 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,834 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,872 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 12, 4, 6]. 50 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 2, 1, 1]. The 9 writes are split as follows [0, 5, 2, 2]. [2025-03-13 21:27:38,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,873 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,891 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,899 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:27:38,921 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:27:38,921 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:27:38,921 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:27:38,921 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:27:38" (1/1) ... [2025-03-13 21:27:38,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:27:38,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:27:38,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-13 21:27:38,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-13 21:27:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:27:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:27:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-13 21:27:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-13 21:27:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-03-13 21:27:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-03-13 21:27:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:27:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:27:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-13 21:27:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-13 21:27:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-13 21:27:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:27:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-13 21:27:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-13 21:27:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:27:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:27:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-13 21:27:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-13 21:27:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-13 21:27:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:27:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:27:38,969 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:27:39,079 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:27:39,080 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:27:40,417 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:27:40,418 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:27:40,418 INFO L318 CfgBuilder]: Performing block encoding