./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/unwind3-1.i --full-output --traceabstraction.use.conditional.por.in.concurrent.analysis false --traceabstraction.commutativity.condition.synthesis NONE --traceabstraction.partial.order.reduction.in.concurrent.analysis SLEEP_NEW_STATES --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 42d87675 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../sv-benchmarks/c/pthread-theta/unwind3-1.i -s /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 ac23e7ddc6ad8a4019915da456e24c280b09a2b1564c0f5287e162f39d98d7fe --traceabstraction.use.conditional.por.in.concurrent.analysis false --traceabstraction.commutativity.condition.synthesis NONE --traceabstraction.partial.order.reduction.in.concurrent.analysis SLEEP_NEW_STATES --- Real Ultimate output --- This is Ultimate 0.3.0-dev-42d8767-m [2025-04-25 01:57:08,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-25 01:57:08,617 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2025-04-25 01:57:08,623 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-25 01:57:08,624 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-25 01:57:08,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-25 01:57:08,644 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-25 01:57:08,644 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-25 01:57:08,644 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-25 01:57:08,644 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-25 01:57:08,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-25 01:57:08,645 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-25 01:57:08,645 INFO L153 SettingsManager]: * Use SBE=true [2025-04-25 01:57:08,645 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-25 01:57:08,645 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-25 01:57:08,645 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-25 01:57:08,645 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-25 01:57:08,645 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-25 01:57:08,646 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-25 01:57:08,646 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-25 01:57:08,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-25 01:57:08,646 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-25 01:57:08,646 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-25 01:57:08,646 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-25 01:57:08,646 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-25 01:57:08,646 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-25 01:57:08,646 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-25 01:57:08,646 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-25 01:57:08,646 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-25 01:57:08,647 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-25 01:57:08,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-25 01:57:08,647 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-25 01:57:08,647 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-25 01:57:08,647 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-25 01:57:08,647 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-25 01:57:08,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-25 01:57:08,647 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-25 01:57:08,648 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-25 01:57:08,648 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-25 01:57:08,648 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-04-25 01:57:08,648 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-25 01:57:08,648 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-25 01:57:08,648 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-04-25 01:57:08,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-25 01:57:08,648 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-04-25 01:57:08,648 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-04-25 01:57:08,649 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-04-25 01:57:08,649 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/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 -> ac23e7ddc6ad8a4019915da456e24c280b09a2b1564c0f5287e162f39d98d7fe Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use conditional POR in concurrent analysis -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Commutativity condition synthesis -> NONE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Partial Order Reduction in concurrent analysis -> SLEEP_NEW_STATES [2025-04-25 01:57:08,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-25 01:57:08,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-25 01:57:08,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-25 01:57:08,906 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-25 01:57:08,907 INFO L274 PluginConnector]: CDTParser initialized [2025-04-25 01:57:08,908 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../sv-benchmarks/c/pthread-theta/unwind3-1.i [2025-04-25 01:57:10,281 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/68e5a96f8/32c1a26cdef24461b3fcc4851fc82336/FLAG346609338 [2025-04-25 01:57:10,560 INFO L389 CDTParser]: Found 1 translation units. [2025-04-25 01:57:10,560 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind3-1.i [2025-04-25 01:57:10,577 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/68e5a96f8/32c1a26cdef24461b3fcc4851fc82336/FLAG346609338 [2025-04-25 01:57:11,282 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/68e5a96f8/32c1a26cdef24461b3fcc4851fc82336 [2025-04-25 01:57:11,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-25 01:57:11,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-25 01:57:11,286 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-25 01:57:11,286 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-25 01:57:11,291 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-25 01:57:11,291 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,292 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5408b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11, skipping insertion in model container [2025-04-25 01:57:11,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,313 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-25 01:57:11,637 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind3-1.i[33026,33039] [2025-04-25 01:57:11,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-25 01:57:11,667 INFO L200 MainTranslator]: Completed pre-run [2025-04-25 01:57:11,717 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind3-1.i[33026,33039] [2025-04-25 01:57:11,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-25 01:57:11,747 INFO L204 MainTranslator]: Completed translation [2025-04-25 01:57:11,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11 WrapperNode [2025-04-25 01:57:11,748 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-25 01:57:11,749 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-25 01:57:11,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-25 01:57:11,750 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-25 01:57:11,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,770 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,782 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2025-04-25 01:57:11,782 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-25 01:57:11,783 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-25 01:57:11,783 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-25 01:57:11,783 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-25 01:57:11,787 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,789 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,789 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,792 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,793 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,794 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,795 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,796 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,799 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-25 01:57:11,799 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-25 01:57:11,799 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-25 01:57:11,799 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-25 01:57:11,800 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (1/1) ... [2025-04-25 01:57:11,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-25 01:57:11,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-25 01:57:11,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-25 01:57:11,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-25 01:57:11,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-25 01:57:11,852 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-04-25 01:57:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-04-25 01:57:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-04-25 01:57:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-04-25 01:57:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-04-25 01:57:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-25 01:57:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-25 01:57:11,854 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-25 01:57:11,964 INFO L234 CfgBuilder]: Building ICFG [2025-04-25 01:57:11,965 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-25 01:57:12,109 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-25 01:57:12,110 INFO L283 CfgBuilder]: Performing block encoding [2025-04-25 01:57:12,193 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-25 01:57:12,193 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-25 01:57:12,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.04 01:57:12 BoogieIcfgContainer [2025-04-25 01:57:12,193 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-25 01:57:12,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-25 01:57:12,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-25 01:57:12,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-25 01:57:12,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.04 01:57:11" (1/3) ... [2025-04-25 01:57:12,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56987eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.04 01:57:12, skipping insertion in model container [2025-04-25 01:57:12,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 01:57:11" (2/3) ... [2025-04-25 01:57:12,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56987eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.04 01:57:12, skipping insertion in model container [2025-04-25 01:57:12,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.04 01:57:12" (3/3) ... [2025-04-25 01:57:12,207 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind3-1.i [2025-04-25 01:57:12,217 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-25 01:57:12,219 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unwind3-1.i that has 3 procedures, 20 locations, 20 edges, 1 initial locations, 2 loop locations, and 1 error locations. [2025-04-25 01:57:12,219 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-25 01:57:12,255 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-25 01:57:12,305 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-25 01:57:12,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-04-25 01:57:12,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-25 01:57:12,310 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2025-04-25 01:57:12,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2025-04-25 01:57:12,377 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-04-25 01:57:12,383 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == f2Thread1of1ForFork0 ======== [2025-04-25 01:57:12,392 INFO L340 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;@68dc7e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-25 01:57:12,392 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-04-25 01:57:12,412 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-25 01:57:12,416 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-25 01:57:12,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1485759046, now seen corresponding path program 1 times [2025-04-25 01:57:12,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-25 01:57:12,423 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537277818] [2025-04-25 01:57:12,423 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-25 01:57:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-25 01:57:12,487 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-25 01:57:12,502 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-25 01:57:12,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-25 01:57:12,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-25 01:57:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-25 01:57:12,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-25 01:57:12,673 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537277818] [2025-04-25 01:57:12,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537277818] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-25 01:57:12,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-25 01:57:12,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-25 01:57:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874837435] [2025-04-25 01:57:12,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-25 01:57:12,678 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-25 01:57:12,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-25 01:57:12,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-25 01:57:12,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-25 01:57:12,694 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-25 01:57:12,695 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-25 01:57:12,696 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2025-04-25 01:57:12,696 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-25 01:57:12,739 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-25 01:57:12,739 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-25 01:57:12,740 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-25 01:57:12,740 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-25 01:57:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash -236137002, now seen corresponding path program 1 times [2025-04-25 01:57:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-25 01:57:12,740 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382731761] [2025-04-25 01:57:12,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-25 01:57:12,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-25 01:57:12,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-25 01:57:12,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-25 01:57:12,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-25 01:57:12,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-25 01:57:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-25 01:57:12,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-25 01:57:12,947 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382731761] [2025-04-25 01:57:12,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382731761] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-25 01:57:12,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-25 01:57:12,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-25 01:57:12,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995979439] [2025-04-25 01:57:12,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-25 01:57:12,948 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-25 01:57:12,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-25 01:57:12,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-25 01:57:12,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-25 01:57:12,949 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-25 01:57:12,950 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-25 01:57:12,950 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2025-04-25 01:57:12,950 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2025-04-25 01:57:12,950 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-25 01:57:13,006 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-25 01:57:13,007 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-25 01:57:13,007 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-25 01:57:13,007 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-25 01:57:13,008 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-25 01:57:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1269656892, now seen corresponding path program 1 times [2025-04-25 01:57:13,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-25 01:57:13,008 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620665062] [2025-04-25 01:57:13,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-25 01:57:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-25 01:57:13,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-25 01:57:13,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-25 01:57:13,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-25 01:57:13,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-25 01:57:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-25 01:57:13,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-25 01:57:13,135 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620665062] [2025-04-25 01:57:13,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620665062] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-25 01:57:13,135 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647204995] [2025-04-25 01:57:13,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-25 01:57:13,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-25 01:57:13,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-25 01:57:13,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-25 01:57:13,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-25 01:57:13,188 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-25 01:57:13,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-25 01:57:13,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-25 01:57:13,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-25 01:57:13,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-25 01:57:13,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-25 01:57:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-25 01:57:13,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-25 01:57:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-25 01:57:13,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647204995] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-25 01:57:13,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-25 01:57:13,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 13 [2025-04-25 01:57:13,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589289859] [2025-04-25 01:57:13,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-25 01:57:13,383 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-25 01:57:13,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-25 01:57:13,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-25 01:57:13,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-04-25 01:57:13,384 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-25 01:57:13,384 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-25 01:57:13,384 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 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) [2025-04-25 01:57:13,384 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2025-04-25 01:57:13,384 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2025-04-25 01:57:13,384 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-25 01:57:13,515 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-25 01:57:13,515 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-25 01:57:13,515 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-25 01:57:13,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-25 01:57:13,716 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-04-25 01:57:13,716 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-25 01:57:13,717 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-25 01:57:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash 704627350, now seen corresponding path program 2 times [2025-04-25 01:57:13,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-25 01:57:13,717 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360998097] [2025-04-25 01:57:13,717 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-25 01:57:13,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-25 01:57:13,723 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-25 01:57:13,748 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-25 01:57:13,750 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-25 01:57:13,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-25 01:57:13,751 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-25 01:57:13,753 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-25 01:57:13,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-25 01:57:13,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-25 01:57:13,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-25 01:57:13,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-25 01:57:13,778 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-25 01:57:13,779 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-04-25 01:57:13,782 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-25 01:57:13,786 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2025-04-25 01:57:13,787 INFO L320 ceAbstractionStarter]: Result for error location f2Thread1of1ForFork0 was UNSAFE (1/2) [2025-04-25 01:57:13,826 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-25 01:57:13,828 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-25 01:57:13,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2025-04-25 01:57:13,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.04 01:57:13 BasicIcfg [2025-04-25 01:57:13,838 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-25 01:57:13,839 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-04-25 01:57:13,839 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-04-25 01:57:13,839 INFO L274 PluginConnector]: Witness Printer initialized [2025-04-25 01:57:13,840 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.04 01:57:12" (3/4) ... [2025-04-25 01:57:13,840 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-04-25 01:57:13,880 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 11. [2025-04-25 01:57:13,911 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/witness.graphml [2025-04-25 01:57:13,911 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/witness.yml [2025-04-25 01:57:13,911 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-04-25 01:57:13,912 INFO L158 Benchmark]: Toolchain (without parser) took 2626.78ms. Allocated memory is still 142.6MB. Free memory was 110.7MB in the beginning and 96.3MB in the end (delta: 14.4MB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. [2025-04-25 01:57:13,912 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 201.3MB. Free memory is still 123.4MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-25 01:57:13,912 INFO L158 Benchmark]: CACSL2BoogieTranslator took 462.25ms. Allocated memory is still 142.6MB. Free memory was 110.2MB in the beginning and 88.2MB in the end (delta: 22.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-04-25 01:57:13,912 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.62ms. Allocated memory is still 142.6MB. Free memory was 88.2MB in the beginning and 86.2MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-25 01:57:13,912 INFO L158 Benchmark]: Boogie Preprocessor took 16.05ms. Allocated memory is still 142.6MB. Free memory was 86.2MB in the beginning and 85.3MB in the end (delta: 950.3kB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-25 01:57:13,913 INFO L158 Benchmark]: RCFGBuilder took 394.02ms. Allocated memory is still 142.6MB. Free memory was 85.3MB in the beginning and 66.3MB in the end (delta: 19.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-04-25 01:57:13,913 INFO L158 Benchmark]: TraceAbstraction took 1639.43ms. Allocated memory is still 142.6MB. Free memory was 65.8MB in the beginning and 103.4MB in the end (delta: -37.6MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-25 01:57:13,913 INFO L158 Benchmark]: Witness Printer took 72.33ms. Allocated memory is still 142.6MB. Free memory was 103.4MB in the beginning and 96.3MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-25 01:57:13,914 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 201.3MB. Free memory is still 123.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 462.25ms. Allocated memory is still 142.6MB. Free memory was 110.2MB in the beginning and 88.2MB in the end (delta: 22.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.62ms. Allocated memory is still 142.6MB. Free memory was 88.2MB in the beginning and 86.2MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 16.05ms. Allocated memory is still 142.6MB. Free memory was 86.2MB in the beginning and 85.3MB in the end (delta: 950.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 394.02ms. Allocated memory is still 142.6MB. Free memory was 85.3MB in the beginning and 66.3MB in the end (delta: 19.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1639.43ms. Allocated memory is still 142.6MB. Free memory was 65.8MB in the beginning and 103.4MB in the end (delta: -37.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 72.33ms. Allocated memory is still 142.6MB. Free memory was 103.4MB in the beginning and 96.3MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Partial order reduction statistics Independence relation #1 benchmarks: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 35, independent: 20, independent conditional: 20, independent unconditional: 0, dependent: 15, dependent conditional: 15, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 20, independent: 20, independent conditional: 0, independent unconditional: 20, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 6, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 6, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 20, independent: 14, independent conditional: 0, independent unconditional: 14, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 6, Positive conditional cache size: 0, Positive unconditional cache size: 6, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Independence queries for same thread: 15 - CounterExampleResult [Line: 753]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L754] 0 int _N; [L755] 0 atomic_int limit; [L770] 0 _N = 1 [L771] CALL 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff / 2) [L750] COND FALSE 0 !(!cond) [L771] RET 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff / 2) [L772] 0 limit = _N VAL [_N=1, limit=1] [L773] 0 int i = 0; VAL [_N=1, i=0, limit=1] [L773] COND TRUE 0 i < _N [L774] 0 pthread_t t; [L775] FCALL, FORK 0 pthread_create(&t, 0, f1, 0) VAL [\at(arg, Pre)={0:0}, _N=1, i=0, limit=1, t=-1] [L757] 1 int l; [L758] 1 l = limit VAL [\at(arg, Pre)={0:0}, _N=1, arg={0:0}, l=1, limit=1] [L759] 1 limit = l + 1 VAL [\at(arg, Pre)={0:0}, _N=1, arg={0:0}, l=1, limit=2] [L760] 1 return 0; [L773] 0 ++i VAL [\at(arg, Pre)={0:0}, \result={0:0}, _N=1, arg={0:0}, i=1, l=1, limit=2] [L773] COND FALSE 0 !(i < _N) [L777] 0 pthread_t t; [L778] FCALL, FORK 0 pthread_create(&t, 0, f2, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, _N=1, arg={0:0}, l=1, limit=2, t=0] [L763] 2 int i, bound; [L764] 2 bound = limit [L765] 2 i = 0 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, _N=1, arg={0:0}, arg={0:0}, bound=2, i=0, l=1, limit=2] [L779] 0 return 0; [L765] COND TRUE 2 i < bound [L765] 2 i++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, _N=1, arg={0:0}, arg={0:0}, bound=2, i=1, l=1, limit=2] [L765] COND TRUE 2 i < bound [L765] 2 i++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, _N=1, arg={0:0}, arg={0:0}, bound=2, i=2, l=1, limit=2] [L765] COND FALSE 2 !(i < bound) [L766] CALL 2 __VERIFIER_assert(i != 2 * _N) [L753] COND TRUE 2 !expression VAL [\at(arg, Pre)={0:0}, \at(expression, Pre)=0, \result={0:0}, _N=1, arg={0:0}, expression=0, l=1, limit=2] [L753] 2 reach_error() VAL [\at(arg, Pre)={0:0}, \at(expression, Pre)=0, \result={0:0}, _N=1, arg={0:0}, expression=0, l=1, limit=2] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: f2Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 33 locations, 35 edges, 4 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 0, PathProgramHistogramMax: 2, 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: 17, 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, 0.6s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 234 SizeOfPredicates, 6 NumberOfNonLiveVariables, 95 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3 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, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-04-25 01:57:13,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (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