./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i --traceabstraction.use.conditional.por.in.concurrent.analysis true --traceabstraction.commutativity.condition.synthesis NONE --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ebd41074 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 --traceabstraction.use.conditional.por.in.concurrent.analysis true --traceabstraction.commutativity.condition.synthesis NONE --- Real Ultimate output --- This is Ultimate 0.3.0-dev-ebd4107-m [2025-01-23 08:10:04,703 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-23 08:10:04,804 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2025-01-23 08:10:04,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-23 08:10:04,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-23 08:10:04,839 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-23 08:10:04,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-23 08:10:04,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-23 08:10:04,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-23 08:10:04,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-23 08:10:04,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-23 08:10:04,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-23 08:10:04,842 INFO L153 SettingsManager]: * Use SBE=true [2025-01-23 08:10:04,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-23 08:10:04,844 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-23 08:10:04,844 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-23 08:10:04,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-23 08:10:04,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-23 08:10:04,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-23 08:10:04,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-23 08:10:04,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-23 08:10:04,844 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-23 08:10:04,844 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-23 08:10:04,844 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-23 08:10:04,845 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-23 08:10:04,845 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-01-23 08:10:04,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-23 08:10:04,846 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-23 08:10:04,846 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-01-23 08:10:04,846 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-01-23 08:10:04,847 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-01-23 08:10:04,847 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use conditional POR in concurrent analysis -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Commutativity condition synthesis -> NONE [2025-01-23 08:10:05,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-23 08:10:05,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-23 08:10:05,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-23 08:10:05,169 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-23 08:10:05,170 INFO L274 PluginConnector]: CDTParser initialized [2025-01-23 08:10:05,172 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2025-01-23 08:10:06,540 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/d3a03e67e/3de9b97ee48d4572984fa72fcbd95abc/FLAG408eabb7f [2025-01-23 08:10:06,768 INFO L384 CDTParser]: Found 1 translation units. [2025-01-23 08:10:06,769 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2025-01-23 08:10:06,780 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/d3a03e67e/3de9b97ee48d4572984fa72fcbd95abc/FLAG408eabb7f [2025-01-23 08:10:07,115 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/d3a03e67e/3de9b97ee48d4572984fa72fcbd95abc [2025-01-23 08:10:07,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-23 08:10:07,118 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-23 08:10:07,119 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-23 08:10:07,119 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-23 08:10:07,122 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-23 08:10:07,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d6c483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07, skipping insertion in model container [2025-01-23 08:10:07,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,161 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-23 08:10:07,384 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i[31306,31319] [2025-01-23 08:10:07,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-23 08:10:07,448 INFO L200 MainTranslator]: Completed pre-run [2025-01-23 08:10:07,544 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i[31306,31319] [2025-01-23 08:10:07,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-23 08:10:07,631 INFO L204 MainTranslator]: Completed translation [2025-01-23 08:10:07,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07 WrapperNode [2025-01-23 08:10:07,632 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-23 08:10:07,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-23 08:10:07,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-23 08:10:07,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-23 08:10:07,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,664 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,731 INFO L138 Inliner]: procedures = 179, calls = 46, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 2099 [2025-01-23 08:10:07,735 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-23 08:10:07,736 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-23 08:10:07,736 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-23 08:10:07,737 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-23 08:10:07,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,758 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,758 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,794 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,803 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,812 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,828 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,842 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-23 08:10:07,843 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-23 08:10:07,844 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-23 08:10:07,844 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-23 08:10:07,845 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (1/1) ... [2025-01-23 08:10:07,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-23 08:10:07,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 08:10:07,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2025-01-23 08:10:07,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2025-01-23 08:10:07,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2025-01-23 08:10:07,916 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-01-23 08:10:07,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-01-23 08:10:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2025-01-23 08:10:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-23 08:10:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-23 08:10:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-23 08:10:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-23 08:10:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-01-23 08:10:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-23 08:10:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-23 08:10:07,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-23 08:10:07,919 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-23 08:10:08,056 INFO L234 CfgBuilder]: Building ICFG [2025-01-23 08:10:08,058 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-23 08:10:09,734 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-23 08:10:09,735 INFO L283 CfgBuilder]: Performing block encoding [2025-01-23 08:15:47,728 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-23 08:15:47,729 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2025-01-23 08:15:47,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 08:15:47 BoogieIcfgContainer [2025-01-23 08:15:47,729 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-23 08:15:47,733 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-23 08:15:47,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-23 08:15:47,736 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-23 08:15:47,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 08:10:07" (1/3) ... [2025-01-23 08:15:47,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33219be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 08:15:47, skipping insertion in model container [2025-01-23 08:15:47,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 08:10:07" (2/3) ... [2025-01-23 08:15:47,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33219be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 08:15:47, skipping insertion in model container [2025-01-23 08:15:47,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 08:15:47" (3/3) ... [2025-01-23 08:15:47,739 INFO L128 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2025-01-23 08:15:47,753 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-23 08:15:47,754 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 26_stack_cas_longest-2.i that has 2 procedures, 29 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-23 08:15:47,754 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-23 08:15:48,519 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-01-23 08:15:48,558 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-23 08:15:48,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-01-23 08:15:48,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 08:15:48,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2025-01-23 08:15:48,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2025-01-23 08:15:48,645 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-01-23 08:15:48,654 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of1ForFork0 ======== [2025-01-23 08:15:48,660 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;@7eae65c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-23 08:15:48,661 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-23 08:15:49,021 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 08:15:49,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 08:15:49,026 INFO L85 PathProgramCache]: Analyzing trace with hash 592073055, now seen corresponding path program 1 times [2025-01-23 08:15:49,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 08:15:49,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988884076] [2025-01-23 08:15:49,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 08:15:49,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms Killed by 15