./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 e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-theta/unwind1-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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-?-e2fb8be-m [2025-03-08 17:41:29,036 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:41:29,079 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:41:29,082 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:41:29,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:41:29,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:41:29,106 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:41:29,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:41:29,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:41:29,106 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:41:29,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:41:29,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:41:29,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:41:29,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:41:29,107 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:41:29,108 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:41:29,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:41:29,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:41:29,108 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/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 [2025-03-08 17:41:29,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:41:29,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:41:29,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:41:29,335 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:41:29,335 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:41:29,336 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind1-1.i [2025-03-08 17:41:30,454 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb4c73c8e/c50426a2008a410b83d68bd9a5237a2d/FLAGf125e83b0 [2025-03-08 17:41:30,779 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:41:30,780 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind1-1.i [2025-03-08 17:41:30,791 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb4c73c8e/c50426a2008a410b83d68bd9a5237a2d/FLAGf125e83b0 [2025-03-08 17:41:30,803 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb4c73c8e/c50426a2008a410b83d68bd9a5237a2d [2025-03-08 17:41:30,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:41:30,807 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:41:30,808 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:41:30,808 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:41:30,811 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:41:30,811 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:41:30" (1/1) ... [2025-03-08 17:41:30,812 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6619f569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:30, skipping insertion in model container [2025-03-08 17:41:30,812 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:41:30" (1/1) ... [2025-03-08 17:41:30,834 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:41:31,013 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind1-1.i[33026,33039] [2025-03-08 17:41:31,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:41:31,036 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:41:31,067 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind1-1.i[33026,33039] [2025-03-08 17:41:31,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:41:31,097 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:41:31,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31 WrapperNode [2025-03-08 17:41:31,098 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:41:31,099 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:41:31,100 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:41:31,100 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:41:31,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,111 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,121 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 51 [2025-03-08 17:41:31,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:41:31,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:41:31,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:41:31,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:41:31,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,128 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,136 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]. [2025-03-08 17:41:31,136 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,137 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,140 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,141 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,142 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,143 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:41:31,143 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:41:31,143 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:41:31,143 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:41:31,144 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (1/1) ... [2025-03-08 17:41:31,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:41:31,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:31,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:41:31,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:41:31,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:41:31,182 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-03-08 17:41:31,183 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-03-08 17:41:31,183 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-03-08 17:41:31,183 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-03-08 17:41:31,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:41:31,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:41:31,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:41:31,184 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:41:31,267 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:41:31,268 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:41:31,359 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:41:31,359 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:41:31,427 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:41:31,428 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:41:31,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:41:31 BoogieIcfgContainer [2025-03-08 17:41:31,428 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:41:31,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:41:31,430 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:41:31,435 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:41:31,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:41:30" (1/3) ... [2025-03-08 17:41:31,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7620ca22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:41:31, skipping insertion in model container [2025-03-08 17:41:31,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:41:31" (2/3) ... [2025-03-08 17:41:31,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7620ca22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:41:31, skipping insertion in model container [2025-03-08 17:41:31,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:41:31" (3/3) ... [2025-03-08 17:41:31,436 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind1-1.i [2025-03-08 17:41:31,449 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:41:31,451 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. [2025-03-08 17:41:31,451 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:41:31,487 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:41:31,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2025-03-08 17:41:31,535 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-08 17:41:31,537 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:41:31,540 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. [2025-03-08 17:41:31,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2025-03-08 17:41:31,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 20 transitions, 49 flow [2025-03-08 17:41:31,548 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:41:31,557 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;@93c9bfd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:41:31,558 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-08 17:41:31,565 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:41:31,565 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2025-03-08 17:41:31,566 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-08 17:41:31,566 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:31,566 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:31,566 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:41:31,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:31,570 INFO L85 PathProgramCache]: Analyzing trace with hash -649076899, now seen corresponding path program 1 times [2025-03-08 17:41:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:31,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341030423] [2025-03-08 17:41:31,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:41:31,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:31,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-08 17:41:31,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-08 17:41:31,648 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:41:31,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:31,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:31,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341030423] [2025-03-08 17:41:31,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341030423] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:41:31,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:41:31,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:41:31,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392005970] [2025-03-08 17:41:31,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:41:31,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:41:31,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:31,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:41:31,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:41:31,924 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:41:31,926 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) [2025-03-08 17:41:31,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:31,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:41:31,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:32,089 INFO L124 PetriNetUnfolderBase]: 203/358 cut-off events. [2025-03-08 17:41:32,089 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2025-03-08 17:41:32,090 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 1342 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. [2025-03-08 17:41:32,092 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 22 selfloop transitions, 3 changer transitions 21/47 dead transitions. [2025-03-08 17:41:32,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 47 transitions, 204 flow [2025-03-08 17:41:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:41:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:41:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2025-03-08 17:41:32,101 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-03-08 17:41:32,102 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 49 flow. Second operand 6 states and 66 transitions. [2025-03-08 17:41:32,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 47 transitions, 204 flow [2025-03-08 17:41:32,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 47 transitions, 193 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:41:32,111 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 54 flow [2025-03-08 17:41:32,113 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} [2025-03-08 17:41:32,115 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 4 predicate places. [2025-03-08 17:41:32,116 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 54 flow [2025-03-08 17:41:32,117 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) [2025-03-08 17:41:32,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:32,118 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:32,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:41:32,119 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:41:32,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1353421958, now seen corresponding path program 1 times [2025-03-08 17:41:32,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:32,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721590522] [2025-03-08 17:41:32,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:41:32,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:32,129 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 17:41:32,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 17:41:32,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:41:32,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:32,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721590522] [2025-03-08 17:41:32,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721590522] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:41:32,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:41:32,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:41:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133436754] [2025-03-08 17:41:32,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:41:32,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:41:32,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:32,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:41:32,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:41:32,197 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:41:32,197 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) [2025-03-08 17:41:32,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:32,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:41:32,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:32,254 INFO L124 PetriNetUnfolderBase]: 53/117 cut-off events. [2025-03-08 17:41:32,259 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2025-03-08 17:41:32,259 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 318 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. [2025-03-08 17:41:32,262 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 16 selfloop transitions, 3 changer transitions 10/31 dead transitions. [2025-03-08 17:41:32,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 31 transitions, 144 flow [2025-03-08 17:41:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:41:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:41:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2025-03-08 17:41:32,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-03-08 17:41:32,265 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 54 flow. Second operand 5 states and 55 transitions. [2025-03-08 17:41:32,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 31 transitions, 144 flow [2025-03-08 17:41:32,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 31 transitions, 135 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-08 17:41:32,266 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 61 flow [2025-03-08 17:41:32,266 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} [2025-03-08 17:41:32,267 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 4 predicate places. [2025-03-08 17:41:32,267 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 61 flow [2025-03-08 17:41:32,267 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) [2025-03-08 17:41:32,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:32,267 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:32,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:41:32,267 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:41:32,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1607046882, now seen corresponding path program 1 times [2025-03-08 17:41:32,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:32,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555812343] [2025-03-08 17:41:32,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:41:32,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:32,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 17:41:32,287 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 17:41:32,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:41:32,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:32,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:32,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555812343] [2025-03-08 17:41:32,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555812343] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:32,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939276716] [2025-03-08 17:41:32,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:41:32,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:32,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:32,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:32,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:41:32,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 17:41:32,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 17:41:32,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:41:32,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:32,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:41:32,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:32,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:32,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939276716] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:32,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:32,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-08 17:41:32,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89865610] [2025-03-08 17:41:32,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:32,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:41:32,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:32,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:41:32,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:41:32,579 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:41:32,580 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) [2025-03-08 17:41:32,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:32,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:41:32,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:32,677 INFO L124 PetriNetUnfolderBase]: 54/115 cut-off events. [2025-03-08 17:41:32,678 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-03-08 17:41:32,678 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 283 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. [2025-03-08 17:41:32,680 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 20 selfloop transitions, 4 changer transitions 4/29 dead transitions. [2025-03-08 17:41:32,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 146 flow [2025-03-08 17:41:32,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:41:32,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:41:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 47 transitions. [2025-03-08 17:41:32,682 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3263888888888889 [2025-03-08 17:41:32,682 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 61 flow. Second operand 6 states and 47 transitions. [2025-03-08 17:41:32,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 146 flow [2025-03-08 17:41:32,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 136 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-03-08 17:41:32,684 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 71 flow [2025-03-08 17:41:32,685 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} [2025-03-08 17:41:32,685 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2025-03-08 17:41:32,686 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 71 flow [2025-03-08 17:41:32,686 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) [2025-03-08 17:41:32,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:32,687 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:32,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:41:32,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:32,888 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:41:32,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:32,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1721184863, now seen corresponding path program 2 times [2025-03-08 17:41:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:32,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772075974] [2025-03-08 17:41:32,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:41:32,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:32,895 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-08 17:41:32,904 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 17:41:32,905 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:32,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:32,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:32,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772075974] [2025-03-08 17:41:32,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772075974] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:32,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354697703] [2025-03-08 17:41:32,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:41:32,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:32,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:32,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:32,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:41:33,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-08 17:41:33,024 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 17:41:33,024 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:33,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:33,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:41:33,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:33,055 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:41:33,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354697703] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:41:33,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:41:33,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2025-03-08 17:41:33,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454135121] [2025-03-08 17:41:33,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:41:33,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:41:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:33,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:41:33,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:41:33,056 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:41:33,056 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) [2025-03-08 17:41:33,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:33,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:41:33,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:33,136 INFO L124 PetriNetUnfolderBase]: 56/131 cut-off events. [2025-03-08 17:41:33,136 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2025-03-08 17:41:33,136 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 372 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. [2025-03-08 17:41:33,137 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 16 selfloop transitions, 2 changer transitions 12/32 dead transitions. [2025-03-08 17:41:33,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 171 flow [2025-03-08 17:41:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:41:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:41:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2025-03-08 17:41:33,139 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4097222222222222 [2025-03-08 17:41:33,139 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 71 flow. Second operand 6 states and 59 transitions. [2025-03-08 17:41:33,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 171 flow [2025-03-08 17:41:33,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 156 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-03-08 17:41:33,140 INFO L231 Difference]: Finished difference. Result has 32 places, 17 transitions, 66 flow [2025-03-08 17:41:33,140 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} [2025-03-08 17:41:33,141 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 8 predicate places. [2025-03-08 17:41:33,141 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 17 transitions, 66 flow [2025-03-08 17:41:33,141 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) [2025-03-08 17:41:33,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:33,141 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:33,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:41:33,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-08 17:41:33,345 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:41:33,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:33,345 INFO L85 PathProgramCache]: Analyzing trace with hash 909129153, now seen corresponding path program 1 times [2025-03-08 17:41:33,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:33,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879066035] [2025-03-08 17:41:33,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:41:33,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:33,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 17:41:33,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 17:41:33,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:41:33,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 17:41:33,354 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 17:41:33,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 17:41:33,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 17:41:33,364 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:41:33,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 17:41:33,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-08 17:41:33,373 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 17:41:33,374 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-03-08 17:41:33,378 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-03-08 17:41:33,378 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-03-08 17:41:33,378 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-03-08 17:41:33,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:41:33,378 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2025-03-08 17:41:33,403 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-08 17:41:33,404 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-08 17:41:33,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.03 05:41:33 BasicIcfg [2025-03-08 17:41:33,410 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-08 17:41:33,410 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-08 17:41:33,411 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-08 17:41:33,411 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-08 17:41:33,411 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:41:31" (3/4) ... [2025-03-08 17:41:33,412 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-03-08 17:41:33,450 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 10. [2025-03-08 17:41:33,489 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-08 17:41:33,489 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-08 17:41:33,489 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-08 17:41:33,490 INFO L158 Benchmark]: Toolchain (without parser) took 2683.13ms. Allocated memory is still 142.6MB. Free memory was 104.0MB in the beginning and 62.3MB in the end (delta: 41.7MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. [2025-03-08 17:41:33,490 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 201.3MB. Free memory is still 126.7MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 17:41:33,491 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.47ms. Allocated memory is still 142.6MB. Free memory was 104.0MB in the beginning and 84.5MB in the end (delta: 19.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-03-08 17:41:33,491 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.71ms. Allocated memory is still 142.6MB. Free memory was 84.5MB in the beginning and 82.5MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 17:41:33,492 INFO L158 Benchmark]: Boogie Preprocessor took 21.23ms. Allocated memory is still 142.6MB. Free memory was 82.5MB in the beginning and 81.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 17:41:33,492 INFO L158 Benchmark]: IcfgBuilder took 284.99ms. Allocated memory is still 142.6MB. Free memory was 81.4MB in the beginning and 62.6MB in the end (delta: 18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 17:41:33,493 INFO L158 Benchmark]: TraceAbstraction took 1979.75ms. Allocated memory is still 142.6MB. Free memory was 61.6MB in the beginning and 68.9MB in the end (delta: -7.3MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 17:41:33,493 INFO L158 Benchmark]: Witness Printer took 78.60ms. Allocated memory is still 142.6MB. Free memory was 68.9MB in the beginning and 62.3MB in the end (delta: 6.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 17:41:33,494 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 201.3MB. Free memory is still 126.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 291.47ms. Allocated memory is still 142.6MB. Free memory was 104.0MB in the beginning and 84.5MB in the end (delta: 19.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.71ms. Allocated memory is still 142.6MB. Free memory was 84.5MB in the beginning and 82.5MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.23ms. Allocated memory is still 142.6MB. Free memory was 82.5MB in the beginning and 81.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 284.99ms. Allocated memory is still 142.6MB. Free memory was 81.4MB in the beginning and 62.6MB in the end (delta: 18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1979.75ms. Allocated memory is still 142.6MB. Free memory was 61.6MB in the beginning and 68.9MB in the end (delta: -7.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 78.60ms. Allocated memory is still 142.6MB. Free memory was 68.9MB in the beginning and 62.3MB in the end (delta: 6.6MB). 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: 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. - 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 37 locations, 42 edges, 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: 1.9s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 126 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 125 mSDsluCounter, 16 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 16 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 278 IncrementalHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 278 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s 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, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 222 SizeOfPredicates, 5 NumberOfNonLiveVariables, 163 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 6/10 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! [2025-03-08 17:41:33,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE