./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 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/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_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F --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 0.3.0-dev-826ab2b [2024-11-13 12:35:00,304 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:35:00,398 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/config/svcomp-Reach-32bit-GemCutter_Default.epf [2024-11-13 12:35:00,408 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:35:00,408 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:35:00,443 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:35:00,445 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:35:00,445 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:35:00,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:35:00,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:35:00,446 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:35:00,447 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:35:00,447 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:35:00,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:35:00,448 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 12:35:00,448 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:35:00,448 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:35:00,448 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:35:00,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:35:00,449 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 12:35:00,449 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:35:00,449 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 12:35:00,449 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:35:00,450 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:35:00,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 12:35:00,450 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:35:00,450 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:35:00,450 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:35:00,450 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:35:00,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:35:00,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 12:35:00,451 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:35:00,451 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:35:00,451 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 12:35:00,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 12:35:00,452 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2024-11-13 12:35:00,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 12:35:00,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:35:00,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2024-11-13 12:35:00,453 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2024-11-13 12:35:00,453 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2024-11-13 12:35:00,453 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F 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 [2024-11-13 12:35:00,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:35:00,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:35:00,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:35:00,822 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:35:00,823 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:35:00,825 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i Unable to find full path for "g++" [2024-11-13 12:35:02,760 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:35:03,084 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:35:03,084 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2024-11-13 12:35:03,102 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/data/6f50ed129/1969c75fa3a94ab28f261e509d32b010/FLAG36a059b5a [2024-11-13 12:35:03,126 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/data/6f50ed129/1969c75fa3a94ab28f261e509d32b010 [2024-11-13 12:35:03,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:35:03,130 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:35:03,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:35:03,132 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:35:03,137 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:35:03,138 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:03,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463c3262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03, skipping insertion in model container [2024-11-13 12:35:03,139 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:03,176 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:35:03,532 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_1e0f4810-0668-4954-be22-8f1c00a7939f/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31306,31319] [2024-11-13 12:35:03,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:35:03,612 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:35:03,657 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_1e0f4810-0668-4954-be22-8f1c00a7939f/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31306,31319] [2024-11-13 12:35:03,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:35:03,732 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:35:03,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03 WrapperNode [2024-11-13 12:35:03,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:35:03,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:35:03,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:35:03,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:35:03,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:03,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:03,860 INFO L138 Inliner]: procedures = 179, calls = 46, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 2105 [2024-11-13 12:35:03,861 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:35:03,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:35:03,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:35:03,862 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:35:03,870 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:03,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:03,887 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:03,888 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:03,949 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:03,982 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:03,991 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:04,002 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:04,018 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:35:04,020 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:35:04,020 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:35:04,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:35:04,022 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (1/1) ... [2024-11-13 12:35:04,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 12:35:04,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/z3 [2024-11-13 12:35:04,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 12:35:04,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 12:35:04,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-13 12:35:04,129 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-13 12:35:04,129 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-13 12:35:04,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-13 12:35:04,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 12:35:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 12:35:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 12:35:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 12:35:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 12:35:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 12:35:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:35:04,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:35:04,132 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 12:35:04,314 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:35:04,316 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:35:06,734 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 12:35:06,734 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:44:36,997 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:44:36,997 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 12:44:36,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:36 BoogieIcfgContainer [2024-11-13 12:44:36,998 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:44:37,000 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:44:37,000 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:44:37,004 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:44:37,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:35:03" (1/3) ... [2024-11-13 12:44:37,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff67708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:37, skipping insertion in model container [2024-11-13 12:44:37,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:35:03" (2/3) ... [2024-11-13 12:44:37,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff67708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:37, skipping insertion in model container [2024-11-13 12:44:37,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:36" (3/3) ... [2024-11-13 12:44:37,012 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2024-11-13 12:44:37,034 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:44:37,036 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG 26_stack_cas_longest-2.i that has 2 procedures, 30 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 12:44:37,036 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 12:44:38,309 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-13 12:44:38,365 INFO L107 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:44:38,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2024-11-13 12:44:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/z3 [2024-11-13 12:44:38,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2024-11-13 12:44:38,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f4810-0668-4954-be22-8f1c00a7939f/bin/ugemcutter-verify-yV71Fz5F0F/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2024-11-13 12:44:38,399 INFO L157 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2024-11-13 12:44:38,411 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of1ForFork0 ======== [2024-11-13 12:44:38,421 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@42b31ac8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:44:38,422 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 12:44:39,314 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:44:39,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1866330673, now seen corresponding path program 1 times [2024-11-13 12:44:39,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:39,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625837115] [2024-11-13 12:44:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms