./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 f8ab0bd5 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-?-f8ab0bd-m [2025-03-13 21:54:40,617 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:54:40,666 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:54:40,669 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:54:40,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:54:40,691 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:54:40,691 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:54:40,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:54:40,692 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:54:40,692 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:54:40,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:54:40,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:54:40,692 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:54:40,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:54:40,692 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:54:40,692 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:54:40,692 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:54:40,692 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:54:40,692 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:54:40,693 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:54:40,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:54:40,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:54:40,695 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:54:40,695 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:54:40,695 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:54:40,695 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:54:40,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:54:40,695 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:54:40,695 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:54:40,695 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:54:40,695 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:54:40,695 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 [2025-03-13 21:54:40,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:54:40,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:54:40,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:54:40,948 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:54:40,949 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:54:40,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind1-1.i [2025-03-13 21:54:42,211 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1579ee4/ed31a94c9b6a42dfaaf24cdd33c8776a/FLAG85d2ba3fb [2025-03-13 21:54:42,470 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:54:42,471 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind1-1.i [2025-03-13 21:54:42,481 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1579ee4/ed31a94c9b6a42dfaaf24cdd33c8776a/FLAG85d2ba3fb [2025-03-13 21:54:42,492 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1579ee4/ed31a94c9b6a42dfaaf24cdd33c8776a [2025-03-13 21:54:42,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:54:42,496 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:54:42,497 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:54:42,497 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:54:42,500 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:54:42,501 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,501 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30270c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42, skipping insertion in model container [2025-03-13 21:54:42,501 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,529 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:54:42,815 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] [2025-03-13 21:54:42,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:54:42,837 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:54:42,875 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] [2025-03-13 21:54:42,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:54:42,900 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:54:42,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42 WrapperNode [2025-03-13 21:54:42,901 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:54:42,902 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:54:42,902 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:54:42,902 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:54:42,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,914 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,926 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 51 [2025-03-13 21:54:42,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:54:42,927 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:54:42,927 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:54:42,927 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:54:42,934 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,934 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,937 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,949 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]. [2025-03-13 21:54:42,949 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,950 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,955 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,957 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,958 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,960 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:54:42,960 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:54:42,960 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:54:42,960 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:54:42,961 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (1/1) ... [2025-03-13 21:54:42,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:54:42,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:42,990 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) [2025-03-13 21:54:42,992 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 [2025-03-13 21:54:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:54:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-03-13 21:54:43,010 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-03-13 21:54:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-03-13 21:54:43,010 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-03-13 21:54:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:54:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:54:43,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:54:43,011 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:54:43,109 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:54:43,110 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:54:43,229 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:54:43,230 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:54:43,230 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:54:43,315 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:54:43,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:54:43 BoogieIcfgContainer [2025-03-13 21:54:43,315 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:54:43,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:54:43,317 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:54:43,320 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:54:43,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:54:42" (1/3) ... [2025-03-13 21:54:43,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b1e1a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:54:43, skipping insertion in model container [2025-03-13 21:54:43,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:54:42" (2/3) ... [2025-03-13 21:54:43,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b1e1a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:54:43, skipping insertion in model container [2025-03-13 21:54:43,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:54:43" (3/3) ... [2025-03-13 21:54:43,323 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind1-1.i [2025-03-13 21:54:43,333 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:54:43,335 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. [2025-03-13 21:54:43,335 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:54:43,376 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-13 21:54:43,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2025-03-13 21:54:43,427 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-13 21:54:43,429 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:54:43,433 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. [2025-03-13 21:54:43,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2025-03-13 21:54:43,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 20 transitions, 49 flow [2025-03-13 21:54:43,441 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:54:43,447 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;@48f759ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:54:43,448 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-13 21:54:43,458 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:54:43,458 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2025-03-13 21:54:43,459 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-13 21:54:43,459 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:43,459 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:43,460 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-13 21:54:43,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash -649076899, now seen corresponding path program 1 times [2025-03-13 21:54:43,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:43,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393986397] [2025-03-13 21:54:43,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:43,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:43,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-13 21:54:43,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-13 21:54:43,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:43,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:43,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:43,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393986397] [2025-03-13 21:54:43,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393986397] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:54:43,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:54:43,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:54:43,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253191513] [2025-03-13 21:54:43,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:54:43,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:54:43,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:43,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:54:43,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:54:43,774 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-13 21:54:43,776 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) [2025-03-13 21:54:43,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:43,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-13 21:54:43,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:43,946 INFO L124 PetriNetUnfolderBase]: 203/358 cut-off events. [2025-03-13 21:54:43,946 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2025-03-13 21:54:43,948 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. [2025-03-13 21:54:43,950 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 22 selfloop transitions, 3 changer transitions 21/47 dead transitions. [2025-03-13 21:54:43,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 47 transitions, 204 flow [2025-03-13 21:54:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:54:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:54:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2025-03-13 21:54:43,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-03-13 21:54:43,959 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 49 flow. Second operand 6 states and 66 transitions. [2025-03-13 21:54:43,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 47 transitions, 204 flow [2025-03-13 21:54:43,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 47 transitions, 193 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-13 21:54:43,965 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 54 flow [2025-03-13 21:54:43,966 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} [2025-03-13 21:54:43,969 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 4 predicate places. [2025-03-13 21:54:43,970 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 54 flow [2025-03-13 21:54:43,970 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) [2025-03-13 21:54:43,970 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:43,970 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:43,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:54:43,971 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-13 21:54:43,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1353421958, now seen corresponding path program 1 times [2025-03-13 21:54:43,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:43,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484667320] [2025-03-13 21:54:43,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:43,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:43,993 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-13 21:54:43,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-13 21:54:43,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:43,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:44,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:44,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484667320] [2025-03-13 21:54:44,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484667320] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:54:44,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:54:44,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:54:44,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47333748] [2025-03-13 21:54:44,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:54:44,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:54:44,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:44,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:54:44,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:54:44,052 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:54:44,052 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) [2025-03-13 21:54:44,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:44,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:54:44,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:44,114 INFO L124 PetriNetUnfolderBase]: 53/117 cut-off events. [2025-03-13 21:54:44,114 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2025-03-13 21:54:44,114 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. [2025-03-13 21:54:44,115 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 16 selfloop transitions, 3 changer transitions 10/31 dead transitions. [2025-03-13 21:54:44,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 31 transitions, 144 flow [2025-03-13 21:54:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:54:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:54:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2025-03-13 21:54:44,116 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-03-13 21:54:44,116 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 54 flow. Second operand 5 states and 55 transitions. [2025-03-13 21:54:44,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 31 transitions, 144 flow [2025-03-13 21:54:44,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 31 transitions, 135 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-13 21:54:44,117 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 61 flow [2025-03-13 21:54:44,117 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} [2025-03-13 21:54:44,117 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 4 predicate places. [2025-03-13 21:54:44,117 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 61 flow [2025-03-13 21:54:44,118 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) [2025-03-13 21:54:44,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:44,118 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:44,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-13 21:54:44,118 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-13 21:54:44,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1607046882, now seen corresponding path program 1 times [2025-03-13 21:54:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:44,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618814671] [2025-03-13 21:54:44,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:44,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:44,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-13 21:54:44,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-13 21:54:44,136 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:44,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:44,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:44,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618814671] [2025-03-13 21:54:44,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618814671] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:44,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250606009] [2025-03-13 21:54:44,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:44,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:44,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:44,222 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) [2025-03-13 21:54:44,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:54:44,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-13 21:54:44,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-13 21:54:44,280 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:44,280 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:44,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:54:44,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:44,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:54:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:44,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250606009] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:54:44,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:54:44,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-13 21:54:44,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621642156] [2025-03-13 21:54:44,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:54:44,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:54:44,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:44,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:54:44,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:54:44,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-13 21:54:44,430 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) [2025-03-13 21:54:44,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:44,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-13 21:54:44,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:44,500 INFO L124 PetriNetUnfolderBase]: 54/115 cut-off events. [2025-03-13 21:54:44,501 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-03-13 21:54:44,501 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. [2025-03-13 21:54:44,502 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 20 selfloop transitions, 4 changer transitions 4/29 dead transitions. [2025-03-13 21:54:44,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 146 flow [2025-03-13 21:54:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:54:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:54:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 47 transitions. [2025-03-13 21:54:44,503 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3263888888888889 [2025-03-13 21:54:44,503 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 61 flow. Second operand 6 states and 47 transitions. [2025-03-13 21:54:44,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 146 flow [2025-03-13 21:54:44,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 136 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-03-13 21:54:44,504 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 71 flow [2025-03-13 21:54:44,504 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} [2025-03-13 21:54:44,505 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2025-03-13 21:54:44,505 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 71 flow [2025-03-13 21:54:44,505 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) [2025-03-13 21:54:44,505 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:44,505 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:44,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-13 21:54:44,710 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 [2025-03-13 21:54:44,710 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-13 21:54:44,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:44,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1721184863, now seen corresponding path program 2 times [2025-03-13 21:54:44,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:44,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900926219] [2025-03-13 21:54:44,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:54:44,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:44,718 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-13 21:54:44,726 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-13 21:54:44,727 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:54:44,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:44,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:54:44,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900926219] [2025-03-13 21:54:44,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900926219] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:54:44,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472122813] [2025-03-13 21:54:44,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:54:44,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:54:44,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:54:44,781 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) [2025-03-13 21:54:44,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:54:44,820 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-13 21:54:44,832 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-13 21:54:44,832 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:54:44,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:54:44,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:54:44,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:54:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:54:44,873 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-13 21:54:44,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472122813] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:54:44,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-13 21:54:44,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2025-03-13 21:54:44,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546019186] [2025-03-13 21:54:44,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:54:44,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:54:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:54:44,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:54:44,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:54:44,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:54:44,874 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) [2025-03-13 21:54:44,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:54:44,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:54:44,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:54:44,963 INFO L124 PetriNetUnfolderBase]: 56/131 cut-off events. [2025-03-13 21:54:44,963 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2025-03-13 21:54:44,964 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. [2025-03-13 21:54:44,965 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 16 selfloop transitions, 2 changer transitions 12/32 dead transitions. [2025-03-13 21:54:44,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 171 flow [2025-03-13 21:54:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:54:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:54:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2025-03-13 21:54:44,966 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4097222222222222 [2025-03-13 21:54:44,966 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 71 flow. Second operand 6 states and 59 transitions. [2025-03-13 21:54:44,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 171 flow [2025-03-13 21:54:44,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 156 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-03-13 21:54:44,967 INFO L231 Difference]: Finished difference. Result has 32 places, 17 transitions, 66 flow [2025-03-13 21:54:44,967 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} [2025-03-13 21:54:44,968 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 8 predicate places. [2025-03-13 21:54:44,968 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 17 transitions, 66 flow [2025-03-13 21:54:44,968 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) [2025-03-13 21:54:44,968 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:54:44,968 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:54:44,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-13 21:54:45,169 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 [2025-03-13 21:54:45,170 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-13 21:54:45,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:54:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash 909129153, now seen corresponding path program 1 times [2025-03-13 21:54:45,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:54:45,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568571277] [2025-03-13 21:54:45,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:54:45,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:54:45,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-13 21:54:45,199 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-13 21:54:45,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:45,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-13 21:54:45,210 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-13 21:54:45,215 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-13 21:54:45,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-13 21:54:45,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:54:45,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-13 21:54:45,257 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-13 21:54:45,258 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-13 21:54:45,259 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-03-13 21:54:45,261 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-03-13 21:54:45,261 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-03-13 21:54:45,261 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-03-13 21:54:45,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-13 21:54:45,262 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2025-03-13 21:54:45,288 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-13 21:54:45,289 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-13 21:54:45,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.03 09:54:45 BasicIcfg [2025-03-13 21:54:45,299 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-13 21:54:45,300 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-13 21:54:45,300 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-13 21:54:45,300 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-13 21:54:45,300 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:54:43" (3/4) ... [2025-03-13 21:54:45,301 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-03-13 21:54:45,355 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 10. [2025-03-13 21:54:45,406 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-13 21:54:45,408 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-13 21:54:45,408 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-13 21:54:45,409 INFO L158 Benchmark]: Toolchain (without parser) took 2912.77ms. Allocated memory is still 167.8MB. Free memory was 123.4MB in the beginning and 115.3MB in the end (delta: 8.1MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2025-03-13 21:54:45,409 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 201.3MB. Free memory is still 116.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-13 21:54:45,410 INFO L158 Benchmark]: CACSL2BoogieTranslator took 404.13ms. Allocated memory is still 167.8MB. Free memory was 123.4MB in the beginning and 103.0MB in the end (delta: 20.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-13 21:54:45,410 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.56ms. Allocated memory is still 167.8MB. Free memory was 103.0MB in the beginning and 101.5MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-13 21:54:45,411 INFO L158 Benchmark]: Boogie Preprocessor took 33.07ms. Allocated memory is still 167.8MB. Free memory was 101.5MB in the beginning and 100.5MB in the end (delta: 982.1kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-13 21:54:45,411 INFO L158 Benchmark]: IcfgBuilder took 355.09ms. Allocated memory is still 167.8MB. Free memory was 100.5MB in the beginning and 80.8MB in the end (delta: 19.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-13 21:54:45,411 INFO L158 Benchmark]: TraceAbstraction took 1981.93ms. Allocated memory is still 167.8MB. Free memory was 79.8MB in the beginning and 121.7MB in the end (delta: -41.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-13 21:54:45,411 INFO L158 Benchmark]: Witness Printer took 108.54ms. Allocated memory is still 167.8MB. Free memory was 121.7MB in the beginning and 115.3MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-13 21:54:45,412 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 201.3MB. Free memory is still 116.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 404.13ms. Allocated memory is still 167.8MB. Free memory was 123.4MB in the beginning and 103.0MB in the end (delta: 20.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.56ms. Allocated memory is still 167.8MB. Free memory was 103.0MB in the beginning and 101.5MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.07ms. Allocated memory is still 167.8MB. Free memory was 101.5MB in the beginning and 100.5MB in the end (delta: 982.1kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 355.09ms. Allocated memory is still 167.8MB. Free memory was 100.5MB in the beginning and 80.8MB in the end (delta: 19.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1981.93ms. Allocated memory is still 167.8MB. Free memory was 79.8MB in the beginning and 121.7MB in the end (delta: -41.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 108.54ms. Allocated memory is still 167.8MB. Free memory was 121.7MB in the beginning and 115.3MB in the end (delta: 6.4MB). 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, 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: 0.4s, 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, 0.2s 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, 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! [2025-03-13 21:54:45,425 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