./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/18_read_write_lock.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/18_read_write_lock.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 530cbf448b6cf17c0bca095a1467011270d511aa4e4e955e07dc3df8c3dfe236 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:16:25,649 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:16:25,688 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:16:25,692 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:16:25,692 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:16:25,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:16:25,707 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:16:25,707 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:16:25,707 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:16:25,707 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:16:25,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:16:25,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:16:25,707 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:16:25,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:16:25,708 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:16:25,708 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:16:25,709 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:16:25,709 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 530cbf448b6cf17c0bca095a1467011270d511aa4e4e955e07dc3df8c3dfe236 [2025-02-06 04:16:25,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:16:25,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:16:25,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:16:25,928 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:16:25,928 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:16:25,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/18_read_write_lock.i [2025-02-06 04:16:27,103 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/78b6c3d4e/0e564339df5446038f29765956076a0a/FLAG5aac9eb98 [2025-02-06 04:16:27,417 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:16:27,417 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/18_read_write_lock.i [2025-02-06 04:16:27,429 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/78b6c3d4e/0e564339df5446038f29765956076a0a/FLAG5aac9eb98 [2025-02-06 04:16:27,444 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/78b6c3d4e/0e564339df5446038f29765956076a0a [2025-02-06 04:16:27,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:16:27,447 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:16:27,448 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:16:27,448 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:16:27,453 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:16:27,454 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb449e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27, skipping insertion in model container [2025-02-06 04:16:27,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,480 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:16:27,730 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/18_read_write_lock.i[30907,30920] [2025-02-06 04:16:27,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:16:27,754 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:16:27,798 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/18_read_write_lock.i[30907,30920] [2025-02-06 04:16:27,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:16:27,826 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:16:27,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27 WrapperNode [2025-02-06 04:16:27,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:16:27,828 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:16:27,828 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:16:27,828 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:16:27,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,839 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,850 INFO L138 Inliner]: procedures = 165, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2025-02-06 04:16:27,851 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:16:27,851 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:16:27,851 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:16:27,851 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:16:27,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,858 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,865 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 11]. The 0 writes are split as follows [0, 0]. [2025-02-06 04:16:27,865 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,865 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,869 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,870 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,871 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,872 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:16:27,872 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:16:27,873 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:16:27,873 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:16:27,873 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (1/1) ... [2025-02-06 04:16:27,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:16:27,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:16:27,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 04:16:27,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 04:16:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockUnlock [2025-02-06 04:16:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-02-06 04:16:27,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-02-06 04:16:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockReadLock [2025-02-06 04:16:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 04:16:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:16:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockWriteLock [2025-02-06 04:16:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:16:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:16:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 04:16:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:16:27,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:16:27,921 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:16:27,997 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:16:28,000 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:16:28,095 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:16:28,095 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:16:28,198 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:16:28,198 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:16:28,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:16:28 BoogieIcfgContainer [2025-02-06 04:16:28,199 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:16:28,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:16:28,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:16:28,203 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:16:28,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:16:27" (1/3) ... [2025-02-06 04:16:28,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d66900b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:16:28, skipping insertion in model container [2025-02-06 04:16:28,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:27" (2/3) ... [2025-02-06 04:16:28,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d66900b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:16:28, skipping insertion in model container [2025-02-06 04:16:28,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:16:28" (3/3) ... [2025-02-06 04:16:28,207 INFO L128 eAbstractionObserver]: Analyzing ICFG 18_read_write_lock.i [2025-02-06 04:16:28,217 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:16:28,221 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 18_read_write_lock.i that has 2 procedures, 21 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-06 04:16:28,221 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:16:28,248 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:16:28,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 21 transitions, 46 flow [2025-02-06 04:16:28,294 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2025-02-06 04:16:28,296 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:16:28,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 20 events. 1/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-02-06 04:16:28,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 21 transitions, 46 flow [2025-02-06 04:16:28,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 16 transitions, 35 flow [2025-02-06 04:16:28,304 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:16:28,311 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=PETRI_NET, 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;@27c96bcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:16:28,311 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-02-06 04:16:28,318 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:16:28,318 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2025-02-06 04:16:28,318 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:16:28,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:16:28,318 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:16:28,319 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:16:28,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:16:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2072208875, now seen corresponding path program 1 times [2025-02-06 04:16:28,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:16:28,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610482019] [2025-02-06 04:16:28,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:16:28,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:16:28,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 04:16:28,408 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 04:16:28,409 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:28,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:16:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:16:28,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:16:28,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610482019] [2025-02-06 04:16:28,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610482019] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:16:28,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:16:28,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 04:16:28,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385709501] [2025-02-06 04:16:28,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:16:28,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:16:28,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:16:28,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:16:28,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:16:28,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2025-02-06 04:16:28,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 35 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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) [2025-02-06 04:16:28,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:16:28,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2025-02-06 04:16:28,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:16:28,734 INFO L124 PetriNetUnfolderBase]: 30/90 cut-off events. [2025-02-06 04:16:28,734 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:16:28,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 90 events. 30/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 272 event pairs, 6 based on Foata normal form. 8/98 useless extension candidates. Maximal degree in co-relation 170. Up to 41 conditions per place. [2025-02-06 04:16:28,736 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 13 selfloop transitions, 5 changer transitions 18/39 dead transitions. [2025-02-06 04:16:28,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 39 transitions, 153 flow [2025-02-06 04:16:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:16:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:16:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 70 transitions. [2025-02-06 04:16:28,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-02-06 04:16:28,750 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 35 flow. Second operand 8 states and 70 transitions. [2025-02-06 04:16:28,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 39 transitions, 153 flow [2025-02-06 04:16:28,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:16:28,755 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 63 flow [2025-02-06 04:16:28,757 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=63, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2025-02-06 04:16:28,759 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2025-02-06 04:16:28,759 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 63 flow [2025-02-06 04:16:28,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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) [2025-02-06 04:16:28,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:16:28,760 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:16:28,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:16:28,760 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:16:28,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:16:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1229596374, now seen corresponding path program 1 times [2025-02-06 04:16:28,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:16:28,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945161442] [2025-02-06 04:16:28,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:16:28,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:16:28,778 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:16:28,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:16:28,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:28,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:16:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:16:28,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:16:28,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945161442] [2025-02-06 04:16:28,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945161442] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:16:28,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:16:28,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:16:28,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467286663] [2025-02-06 04:16:28,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:16:28,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:16:28,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:16:28,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:16:28,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:16:28,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2025-02-06 04:16:28,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2025-02-06 04:16:28,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:16:28,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2025-02-06 04:16:28,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:16:28,988 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2025-02-06 04:16:28,988 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-02-06 04:16:28,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 27 events. 6/27 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 0 based on Foata normal form. 5/32 useless extension candidates. Maximal degree in co-relation 68. Up to 16 conditions per place. [2025-02-06 04:16:28,988 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 14 selfloop transitions, 1 changer transitions 1/20 dead transitions. [2025-02-06 04:16:28,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 108 flow [2025-02-06 04:16:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:16:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:16:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2025-02-06 04:16:28,992 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2025-02-06 04:16:28,992 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 63 flow. Second operand 3 states and 34 transitions. [2025-02-06 04:16:28,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 108 flow [2025-02-06 04:16:28,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 94 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-02-06 04:16:28,994 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 53 flow [2025-02-06 04:16:28,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2025-02-06 04:16:28,995 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 4 predicate places. [2025-02-06 04:16:28,995 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 53 flow [2025-02-06 04:16:28,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2025-02-06 04:16:28,995 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:16:28,996 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:16:28,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:16:28,996 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:16:28,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:16:28,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1338348182, now seen corresponding path program 2 times [2025-02-06 04:16:28,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:16:28,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691751973] [2025-02-06 04:16:28,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:16:28,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:16:29,009 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:16:29,014 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:16:29,016 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:16:29,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:16:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:16:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:16:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691751973] [2025-02-06 04:16:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691751973] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:16:29,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:16:29,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:16:29,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295545618] [2025-02-06 04:16:29,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:16:29,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:16:29,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:16:29,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:16:29,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:16:29,082 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2025-02-06 04:16:29,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2025-02-06 04:16:29,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:16:29,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2025-02-06 04:16:29,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:16:29,095 INFO L124 PetriNetUnfolderBase]: 1/12 cut-off events. [2025-02-06 04:16:29,095 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-06 04:16:29,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 12 events. 1/12 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 4/16 useless extension candidates. Maximal degree in co-relation 26. Up to 7 conditions per place. [2025-02-06 04:16:29,096 INFO L140 encePairwiseOnDemand]: 19/21 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2025-02-06 04:16:29,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 11 transitions, 53 flow [2025-02-06 04:16:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:16:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:16:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2025-02-06 04:16:29,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2025-02-06 04:16:29,096 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 53 flow. Second operand 3 states and 28 transitions. [2025-02-06 04:16:29,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 11 transitions, 53 flow [2025-02-06 04:16:29,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 11 transitions, 47 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 04:16:29,097 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2025-02-06 04:16:29,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2025-02-06 04:16:29,097 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, -2 predicate places. [2025-02-06 04:16:29,097 INFO L471 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2025-02-06 04:16:29,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2025-02-06 04:16:29,099 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2025-02-06 04:16:29,099 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2025-02-06 04:16:29,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:16:29,100 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1] [2025-02-06 04:16:29,102 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 04:16:29,102 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 04:16:29,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 04:16:29 BasicIcfg [2025-02-06 04:16:29,105 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 04:16:29,105 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 04:16:29,105 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 04:16:29,105 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 04:16:29,106 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:16:28" (3/4) ... [2025-02-06 04:16:29,110 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-06 04:16:29,112 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thr1 [2025-02-06 04:16:29,118 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2025-02-06 04:16:29,118 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2025-02-06 04:16:29,118 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2025-02-06 04:16:29,118 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2025-02-06 04:16:29,118 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-06 04:16:29,171 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-06 04:16:29,171 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-06 04:16:29,171 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 04:16:29,172 INFO L158 Benchmark]: Toolchain (without parser) took 1724.69ms. Allocated memory is still 167.8MB. Free memory was 122.6MB in the beginning and 90.2MB in the end (delta: 32.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2025-02-06 04:16:29,172 INFO L158 Benchmark]: CDTParser took 0.88ms. Allocated memory is still 201.3MB. Free memory is still 116.7MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:16:29,172 INFO L158 Benchmark]: CACSL2BoogieTranslator took 379.18ms. Allocated memory is still 167.8MB. Free memory was 122.6MB in the beginning and 102.4MB in the end (delta: 20.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 04:16:29,173 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.86ms. Allocated memory is still 167.8MB. Free memory was 102.4MB in the beginning and 101.0MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:16:29,173 INFO L158 Benchmark]: Boogie Preprocessor took 20.92ms. Allocated memory is still 167.8MB. Free memory was 101.0MB in the beginning and 99.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:16:29,173 INFO L158 Benchmark]: IcfgBuilder took 326.12ms. Allocated memory is still 167.8MB. Free memory was 99.6MB in the beginning and 76.6MB in the end (delta: 23.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 04:16:29,173 INFO L158 Benchmark]: TraceAbstraction took 904.43ms. Allocated memory is still 167.8MB. Free memory was 76.6MB in the beginning and 95.3MB in the end (delta: -18.8MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:16:29,173 INFO L158 Benchmark]: Witness Printer took 66.50ms. Allocated memory is still 167.8MB. Free memory was 95.3MB in the beginning and 90.2MB in the end (delta: 5.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:16:29,174 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.88ms. Allocated memory is still 201.3MB. Free memory is still 116.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 379.18ms. Allocated memory is still 167.8MB. Free memory was 122.6MB in the beginning and 102.4MB in the end (delta: 20.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.86ms. Allocated memory is still 167.8MB. Free memory was 102.4MB in the beginning and 101.0MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.92ms. Allocated memory is still 167.8MB. Free memory was 101.0MB in the beginning and 99.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 326.12ms. Allocated memory is still 167.8MB. Free memory was 99.6MB in the beginning and 76.6MB in the end (delta: 23.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 904.43ms. Allocated memory is still 167.8MB. Free memory was 76.6MB in the beginning and 95.3MB in the end (delta: -18.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 66.50ms. Allocated memory is still 167.8MB. Free memory was 95.3MB in the beginning and 90.2MB in the end (delta: 5.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 709]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 28 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 139 IncrementalHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 139 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=1, InterpolantAutomatonStates: 14, 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, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 102 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-06 04:16:29,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-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 Result: TRUE