./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/unwind1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d 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-theta/unwind1-1.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 369675afdce9f24a16d648c2af0379dafe84b15f75fb11d38697f731d0b5b69e --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 01:23:13,231 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 01:23:13,265 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-08 01:23:13,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 01:23:13,268 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 01:23:13,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 01:23:13,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 01:23:13,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 01:23:13,282 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 01:23:13,282 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 01:23:13,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 01:23:13,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 01:23:13,283 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 01:23:13,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 01:23:13,283 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 01:23:13,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 01:23:13,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 01:23:13,283 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 01:23:13,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 01:23:13,284 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 01:23:13,284 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 01:23:13,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:23:13,285 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 01:23:13,285 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 01:23:13,285 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 01:23:13,285 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 01:23:13,285 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 01:23:13,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 01:23:13,285 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 01:23:13,285 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 01:23:13,285 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 01:23:13,285 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 01:23:13,285 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 -> 369675afdce9f24a16d648c2af0379dafe84b15f75fb11d38697f731d0b5b69e [2025-02-08 01:23:13,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 01:23:13,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 01:23:13,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 01:23:13,457 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 01:23:13,457 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 01:23:13,458 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind1-1.i [2025-02-08 01:23:14,647 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/51f2714d7/be9f450c846943c983c31798ae458ac4/FLAGa50e93a02 [2025-02-08 01:23:15,058 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 01:23:15,059 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind1-1.i [2025-02-08 01:23:15,082 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/51f2714d7/be9f450c846943c983c31798ae458ac4/FLAGa50e93a02 [2025-02-08 01:23:15,242 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/51f2714d7/be9f450c846943c983c31798ae458ac4 [2025-02-08 01:23:15,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 01:23:15,248 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 01:23:15,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 01:23:15,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 01:23:15,254 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 01:23:15,258 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@139279b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15, skipping insertion in model container [2025-02-08 01:23:15,263 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,304 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 01:23:15,528 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-theta/unwind1-1.i[33026,33039] [2025-02-08 01:23:15,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:23:15,551 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 01:23:15,573 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-theta/unwind1-1.i[33026,33039] [2025-02-08 01:23:15,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:23:15,600 INFO L204 MainTranslator]: Completed translation [2025-02-08 01:23:15,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15 WrapperNode [2025-02-08 01:23:15,602 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 01:23:15,603 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 01:23:15,603 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 01:23:15,603 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 01:23:15,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,616 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,628 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 51 [2025-02-08 01:23:15,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 01:23:15,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 01:23:15,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 01:23:15,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 01:23:15,635 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,638 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,646 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-08 01:23:15,647 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,647 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,649 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,649 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,650 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,652 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 01:23:15,652 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 01:23:15,652 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 01:23:15,652 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 01:23:15,653 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (1/1) ... [2025-02-08 01:23:15,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:23:15,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:23:15,682 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) [2025-02-08 01:23:15,690 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 [2025-02-08 01:23:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 01:23:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-02-08 01:23:15,708 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-02-08 01:23:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-02-08 01:23:15,708 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-02-08 01:23:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 01:23:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 01:23:15,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 01:23:15,709 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 01:23:15,800 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 01:23:15,802 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 01:23:15,907 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 01:23:15,908 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 01:23:15,960 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 01:23:15,960 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 01:23:15,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:23:15 BoogieIcfgContainer [2025-02-08 01:23:15,960 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 01:23:15,962 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 01:23:15,962 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 01:23:15,966 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 01:23:15,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 01:23:15" (1/3) ... [2025-02-08 01:23:15,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31102a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:23:15, skipping insertion in model container [2025-02-08 01:23:15,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:15" (2/3) ... [2025-02-08 01:23:15,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31102a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:23:15, skipping insertion in model container [2025-02-08 01:23:15,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:23:15" (3/3) ... [2025-02-08 01:23:15,967 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind1-1.i [2025-02-08 01:23:15,978 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 01:23:15,979 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unwind1-1.i that has 3 procedures, 22 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-08 01:23:15,979 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 01:23:16,006 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-08 01:23:16,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2025-02-08 01:23:16,040 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-02-08 01:23:16,041 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 01:23:16,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 22 events. 3/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-02-08 01:23:16,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2025-02-08 01:23:16,045 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 20 transitions, 49 flow [2025-02-08 01:23:16,050 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 01:23:16,056 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;@c1cfadc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 01:23:16,057 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-08 01:23:16,061 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 01:23:16,061 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2025-02-08 01:23:16,062 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-08 01:23:16,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:16,062 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:16,062 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 01:23:16,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:16,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1702533698, now seen corresponding path program 1 times [2025-02-08 01:23:16,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:16,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486778926] [2025-02-08 01:23:16,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:16,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:16,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 01:23:16,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 01:23:16,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:16,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:16,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:23:16,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486778926] [2025-02-08 01:23:16,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486778926] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:23:16,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:23:16,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 01:23:16,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311802368] [2025-02-08 01:23:16,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:23:16,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 01:23:16,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:23:16,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 01:23:16,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 01:23:16,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-02-08 01:23:16,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2025-02-08 01:23:16,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:23:16,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-02-08 01:23:16,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:23:16,433 INFO L124 PetriNetUnfolderBase]: 203/358 cut-off events. [2025-02-08 01:23:16,434 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2025-02-08 01:23:16,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 358 events. 203/358 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1351 event pairs, 83 based on Foata normal form. 13/310 useless extension candidates. Maximal degree in co-relation 672. Up to 186 conditions per place. [2025-02-08 01:23:16,437 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 22 selfloop transitions, 3 changer transitions 21/47 dead transitions. [2025-02-08 01:23:16,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 47 transitions, 204 flow [2025-02-08 01:23:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:23:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:23:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2025-02-08 01:23:16,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-02-08 01:23:16,447 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 49 flow. Second operand 6 states and 66 transitions. [2025-02-08 01:23:16,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 47 transitions, 204 flow [2025-02-08 01:23:16,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 47 transitions, 193 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 01:23:16,476 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 54 flow [2025-02-08 01:23:16,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=54, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2025-02-08 01:23:16,479 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 4 predicate places. [2025-02-08 01:23:16,480 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 54 flow [2025-02-08 01:23:16,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2025-02-08 01:23:16,480 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:16,480 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:16,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 01:23:16,480 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 01:23:16,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:16,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1238967741, now seen corresponding path program 1 times [2025-02-08 01:23:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:16,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718413998] [2025-02-08 01:23:16,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:16,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:16,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 01:23:16,493 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 01:23:16,493 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:16,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:16,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:23:16,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718413998] [2025-02-08 01:23:16,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718413998] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:23:16,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437161168] [2025-02-08 01:23:16,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:16,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:23:16,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:23:16,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:23:16,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 01:23:16,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 01:23:16,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 01:23:16,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:16,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:16,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 01:23:16,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:23:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:16,688 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:23:16,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437161168] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:23:16,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:23:16,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-02-08 01:23:16,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690194587] [2025-02-08 01:23:16,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:23:16,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:23:16,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:23:16,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:23:16,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:23:16,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-02-08 01:23:16,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2025-02-08 01:23:16,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:23:16,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-02-08 01:23:16,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:23:16,766 INFO L124 PetriNetUnfolderBase]: 53/117 cut-off events. [2025-02-08 01:23:16,767 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2025-02-08 01:23:16,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 117 events. 53/117 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 315 event pairs, 18 based on Foata normal form. 13/119 useless extension candidates. Maximal degree in co-relation 261. Up to 55 conditions per place. [2025-02-08 01:23:16,768 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 16 selfloop transitions, 3 changer transitions 10/31 dead transitions. [2025-02-08 01:23:16,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 31 transitions, 144 flow [2025-02-08 01:23:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:23:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:23:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2025-02-08 01:23:16,771 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-02-08 01:23:16,771 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 54 flow. Second operand 5 states and 55 transitions. [2025-02-08 01:23:16,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 31 transitions, 144 flow [2025-02-08 01:23:16,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 31 transitions, 135 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-08 01:23:16,775 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 61 flow [2025-02-08 01:23:16,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=61, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2025-02-08 01:23:16,777 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 4 predicate places. [2025-02-08 01:23:16,777 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 61 flow [2025-02-08 01:23:16,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2025-02-08 01:23:16,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:16,778 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:16,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-08 01:23:16,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:23:16,984 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 01:23:16,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:16,985 INFO L85 PathProgramCache]: Analyzing trace with hash -467528637, now seen corresponding path program 1 times [2025-02-08 01:23:16,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:16,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461591546] [2025-02-08 01:23:16,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:16,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:16,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 01:23:16,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 01:23:16,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:16,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:17,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:23:17,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461591546] [2025-02-08 01:23:17,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461591546] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:23:17,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694516115] [2025-02-08 01:23:17,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:17,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:23:17,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:23:17,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:23:17,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 01:23:17,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 01:23:17,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 01:23:17,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:17,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:17,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 01:23:17,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:23:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:17,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:23:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:17,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694516115] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:23:17,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:23:17,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-02-08 01:23:17,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468908512] [2025-02-08 01:23:17,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:23:17,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 01:23:17,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:23:17,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 01:23:17,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-08 01:23:17,203 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-02-08 01:23:17,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 61 flow. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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) [2025-02-08 01:23:17,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:23:17,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-02-08 01:23:17,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:23:17,270 INFO L124 PetriNetUnfolderBase]: 54/115 cut-off events. [2025-02-08 01:23:17,270 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-02-08 01:23:17,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 115 events. 54/115 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 275 event pairs, 30 based on Foata normal form. 5/106 useless extension candidates. Maximal degree in co-relation 215. Up to 80 conditions per place. [2025-02-08 01:23:17,271 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 20 selfloop transitions, 4 changer transitions 4/29 dead transitions. [2025-02-08 01:23:17,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 146 flow [2025-02-08 01:23:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:23:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:23:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 47 transitions. [2025-02-08 01:23:17,279 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3263888888888889 [2025-02-08 01:23:17,279 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 61 flow. Second operand 6 states and 47 transitions. [2025-02-08 01:23:17,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 146 flow [2025-02-08 01:23:17,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 136 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-08 01:23:17,280 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 71 flow [2025-02-08 01:23:17,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2025-02-08 01:23:17,280 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2025-02-08 01:23:17,280 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 71 flow [2025-02-08 01:23:17,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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) [2025-02-08 01:23:17,281 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:17,281 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:17,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 01:23:17,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:23:17,482 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 01:23:17,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:17,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1608516514, now seen corresponding path program 2 times [2025-02-08 01:23:17,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:17,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912618994] [2025-02-08 01:23:17,483 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:23:17,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:17,493 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-08 01:23:17,499 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 01:23:17,499 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:23:17,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:17,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:23:17,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912618994] [2025-02-08 01:23:17,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912618994] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:23:17,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493053176] [2025-02-08 01:23:17,580 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:23:17,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:23:17,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:23:17,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:23:17,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 01:23:17,616 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-08 01:23:17,626 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 01:23:17,626 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:23:17,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:17,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 01:23:17,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:23:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:17,681 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:23:17,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493053176] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:23:17,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:23:17,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2025-02-08 01:23:17,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085670] [2025-02-08 01:23:17,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:23:17,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:23:17,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:23:17,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:23:17,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:23:17,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-02-08 01:23:17,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 71 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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) [2025-02-08 01:23:17,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:23:17,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-02-08 01:23:17,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:23:17,779 INFO L124 PetriNetUnfolderBase]: 56/131 cut-off events. [2025-02-08 01:23:17,779 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2025-02-08 01:23:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 131 events. 56/131 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 370 event pairs, 27 based on Foata normal form. 5/127 useless extension candidates. Maximal degree in co-relation 343. Up to 60 conditions per place. [2025-02-08 01:23:17,780 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 16 selfloop transitions, 2 changer transitions 12/32 dead transitions. [2025-02-08 01:23:17,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 171 flow [2025-02-08 01:23:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:23:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:23:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2025-02-08 01:23:17,781 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4097222222222222 [2025-02-08 01:23:17,781 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 71 flow. Second operand 6 states and 59 transitions. [2025-02-08 01:23:17,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 171 flow [2025-02-08 01:23:17,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 156 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-02-08 01:23:17,783 INFO L231 Difference]: Finished difference. Result has 32 places, 17 transitions, 66 flow [2025-02-08 01:23:17,783 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=17} [2025-02-08 01:23:17,783 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 8 predicate places. [2025-02-08 01:23:17,783 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 17 transitions, 66 flow [2025-02-08 01:23:17,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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) [2025-02-08 01:23:17,783 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:17,783 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:17,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 01:23:17,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:23:17,984 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 01:23:17,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1021797502, now seen corresponding path program 1 times [2025-02-08 01:23:17,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:17,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296094067] [2025-02-08 01:23:17,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:17,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:17,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 01:23:17,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 01:23:17,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:17,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 01:23:17,995 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 01:23:18,001 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 01:23:18,005 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 01:23:18,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:18,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 01:23:18,015 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 01:23:18,015 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 01:23:18,016 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-02-08 01:23:18,017 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-02-08 01:23:18,017 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-02-08 01:23:18,018 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-02-08 01:23:18,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 01:23:18,018 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2025-02-08 01:23:18,036 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-08 01:23:18,037 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 01:23:18,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 01:23:18 BasicIcfg [2025-02-08 01:23:18,041 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 01:23:18,041 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 01:23:18,041 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 01:23:18,041 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 01:23:18,042 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:23:15" (3/4) ... [2025-02-08 01:23:18,042 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-02-08 01:23:18,075 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 10. [2025-02-08 01:23:18,113 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-08 01:23:18,114 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-08 01:23:18,114 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 01:23:18,116 INFO L158 Benchmark]: Toolchain (without parser) took 2866.48ms. Allocated memory is still 167.8MB. Free memory was 122.2MB in the beginning and 102.7MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2025-02-08 01:23:18,116 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 201.3MB. Free memory is still 115.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 01:23:18,116 INFO L158 Benchmark]: CACSL2BoogieTranslator took 353.52ms. Allocated memory is still 167.8MB. Free memory was 122.2MB in the beginning and 101.8MB in the end (delta: 20.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-02-08 01:23:18,116 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.34ms. Allocated memory is still 167.8MB. Free memory was 101.8MB in the beginning and 100.8MB in the end (delta: 987.5kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 01:23:18,117 INFO L158 Benchmark]: Boogie Preprocessor took 21.93ms. Allocated memory is still 167.8MB. Free memory was 100.8MB in the beginning and 98.8MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 01:23:18,117 INFO L158 Benchmark]: IcfgBuilder took 308.31ms. Allocated memory is still 167.8MB. Free memory was 98.8MB in the beginning and 79.0MB in the end (delta: 19.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-08 01:23:18,117 INFO L158 Benchmark]: TraceAbstraction took 2078.54ms. Allocated memory is still 167.8MB. Free memory was 79.0MB in the beginning and 109.0MB in the end (delta: -30.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 01:23:18,117 INFO L158 Benchmark]: Witness Printer took 72.73ms. Allocated memory is still 167.8MB. Free memory was 109.0MB in the beginning and 102.7MB in the end (delta: 6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 01:23:18,118 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 201.3MB. Free memory is still 115.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 353.52ms. Allocated memory is still 167.8MB. Free memory was 122.2MB in the beginning and 101.8MB in the end (delta: 20.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.34ms. Allocated memory is still 167.8MB. Free memory was 101.8MB in the beginning and 100.8MB in the end (delta: 987.5kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.93ms. Allocated memory is still 167.8MB. Free memory was 100.8MB in the beginning and 98.8MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 308.31ms. Allocated memory is still 167.8MB. Free memory was 98.8MB in the beginning and 79.0MB in the end (delta: 19.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 2078.54ms. Allocated memory is still 167.8MB. Free memory was 79.0MB in the beginning and 109.0MB in the end (delta: -30.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 72.73ms. Allocated memory is still 167.8MB. Free memory was 109.0MB in the beginning and 102.7MB in the end (delta: 6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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; [L772] 0 _N = 1 [L773] CALL 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L750] COND FALSE 0 !(!cond) [L773] RET 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L774] 0 pthread_t t1, t2; [L775] FCALL, FORK 0 pthread_create(&t1, 0, f1, 0) VAL [\old(arg)={0:0}, _N=1, limit=0, t1=-1] [L776] FCALL, FORK 0 pthread_create(&t2, 0, f2, 0) VAL [\old(arg)={0:0}, _N=1, arg={0:0}, limit=0, t1=-1, t2=0] [L757] COND FALSE 1 !(__VERIFIER_nondet_int()) [L760] 1 limit = _N + 1 VAL [\old(arg)={0:0}, _N=1, arg={0:0}, limit=2] [L765] 2 int i, bound; [L766] 2 bound = limit [L767] 2 i = 0 VAL [\old(arg)={0:0}, \old(arg)={0:0}, _N=1, arg={0:0}, arg={0:0}, bound=2, i=0, limit=2] [L767] COND TRUE 2 i < bound [L767] 2 i++ VAL [\old(arg)={0:0}, \old(arg)={0:0}, _N=1, arg={0:0}, arg={0:0}, bound=2, i=1, limit=2] [L767] COND TRUE 2 i < bound [L767] 2 i++ VAL [\old(arg)={0:0}, \old(arg)={0:0}, _N=1, arg={0:0}, arg={0:0}, bound=2, i=2, limit=2] [L767] COND FALSE 2 !(i < bound) [L768] CALL 2 __VERIFIER_assert(i <= _N) [L753] COND TRUE 2 !expression VAL [\old(arg)={0:0}, \old(expression)=0, _N=1, arg={0:0}, expression=0, limit=2] [L753] 2 reach_error() VAL [\old(arg)={0:0}, \old(expression)=0, _N=1, arg={0:0}, expression=0, limit=2] - UnprovableResult [Line: 775]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 776]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 37 locations, 4 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: 2.0s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 120 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 120 mSDsluCounter, 11 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 294 IncrementalHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 294 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=3, InterpolantAutomatonStates: 23, 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, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 249 SizeOfPredicates, 6 NumberOfNonLiveVariables, 234 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 6/11 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! [2025-02-08 01:23:18,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, 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