./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/unwind2-nondet.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-theta/unwind2-nondet.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 797a9e1bf9dc9387a2e0877719131f75c1f5b0797aa4bcc7c94038568bc56c2d --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 01:23:29,734 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 01:23:29,773 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-08 01:23:29,776 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 01:23:29,777 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 01:23:29,791 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 01:23:29,791 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 01:23:29,791 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 01:23:29,792 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 01:23:29,792 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 01:23:29,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 01:23:29,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 01:23:29,792 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 01:23:29,792 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 01:23:29,792 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 01:23:29,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 01:23:29,793 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 01:23:29,793 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 01:23:29,793 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 01:23:29,793 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 01:23:29,793 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 01:23:29,793 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 01:23:29,793 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 01:23:29,793 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 01:23:29,793 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 01:23:29,793 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 01:23:29,794 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 01:23:29,794 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 01:23:29,794 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 01:23:29,794 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 01:23:29,794 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 01:23:29,794 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 01:23:29,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:23:29,794 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 01:23:29,794 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 01:23:29,794 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 01:23:29,795 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 01:23:29,795 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 01:23:29,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 01:23:29,795 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 01:23:29,795 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 01:23:29,795 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 01:23:29,795 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 01:23:29,795 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 797a9e1bf9dc9387a2e0877719131f75c1f5b0797aa4bcc7c94038568bc56c2d [2025-02-08 01:23:29,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 01:23:29,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 01:23:29,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 01:23:29,999 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 01:23:30,000 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 01:23:30,000 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind2-nondet.i [2025-02-08 01:23:31,069 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f167f6db3/e41320f8e2af4e8780f4de7595742197/FLAG39a14b54e [2025-02-08 01:23:31,387 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 01:23:31,388 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-nondet.i [2025-02-08 01:23:31,405 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f167f6db3/e41320f8e2af4e8780f4de7595742197/FLAG39a14b54e [2025-02-08 01:23:31,633 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f167f6db3/e41320f8e2af4e8780f4de7595742197 [2025-02-08 01:23:31,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 01:23:31,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 01:23:31,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 01:23:31,637 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 01:23:31,642 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 01:23:31,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:23:31" (1/1) ... [2025-02-08 01:23:31,645 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eeb7f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:31, skipping insertion in model container [2025-02-08 01:23:31,645 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:23:31" (1/1) ... [2025-02-08 01:23:31,677 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 01:23:31,932 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-nondet.i[33026,33039] [2025-02-08 01:23:31,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:23:31,957 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 01:23:31,998 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-nondet.i[33026,33039] [2025-02-08 01:23:32,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:23:32,034 INFO L204 MainTranslator]: Completed translation [2025-02-08 01:23:32,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32 WrapperNode [2025-02-08 01:23:32,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 01:23:32,037 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 01:23:32,037 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 01:23:32,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 01:23:32,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,070 INFO L138 Inliner]: procedures = 169, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2025-02-08 01:23:32,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 01:23:32,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 01:23:32,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 01:23:32,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 01:23:32,078 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,080 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,095 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-08 01:23:32,095 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,096 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,100 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,104 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,105 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,106 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,107 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 01:23:32,111 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 01:23:32,113 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 01:23:32,113 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 01:23:32,114 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (1/1) ... [2025-02-08 01:23:32,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:23:32,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:23:32,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 01:23:32,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 01:23:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 01:23:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-02-08 01:23:32,172 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-02-08 01:23:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-02-08 01:23:32,172 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-02-08 01:23:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 01:23:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 01:23:32,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 01:23:32,174 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 01:23:32,267 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 01:23:32,269 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 01:23:32,410 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 01:23:32,411 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 01:23:32,478 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 01:23:32,478 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 01:23:32,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:23:32 BoogieIcfgContainer [2025-02-08 01:23:32,479 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 01:23:32,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 01:23:32,484 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 01:23:32,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 01:23:32,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 01:23:31" (1/3) ... [2025-02-08 01:23:32,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323a3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:23:32, skipping insertion in model container [2025-02-08 01:23:32,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:23:32" (2/3) ... [2025-02-08 01:23:32,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323a3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:23:32, skipping insertion in model container [2025-02-08 01:23:32,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:23:32" (3/3) ... [2025-02-08 01:23:32,490 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind2-nondet.i [2025-02-08 01:23:32,501 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 01:23:32,502 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unwind2-nondet.i that has 3 procedures, 27 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-02-08 01:23:32,502 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 01:23:32,532 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-08 01:23:32,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2025-02-08 01:23:32,576 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2025-02-08 01:23:32,578 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 01:23:32,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2025-02-08 01:23:32,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2025-02-08 01:23:32,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 61 flow [2025-02-08 01:23:32,588 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 01:23:32,606 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;@591f2053, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 01:23:32,606 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-02-08 01:23:32,613 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 01:23:32,613 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-02-08 01:23:32,614 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 01:23:32,614 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:32,614 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:32,615 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-08 01:23:32,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:32,619 INFO L85 PathProgramCache]: Analyzing trace with hash 848759980, now seen corresponding path program 1 times [2025-02-08 01:23:32,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:32,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950477438] [2025-02-08 01:23:32,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:32,681 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 01:23:32,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 01:23:32,697 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:32,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:32,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:23:32,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950477438] [2025-02-08 01:23:32,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950477438] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:23:32,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:23:32,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-08 01:23:32,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150375126] [2025-02-08 01:23:32,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:23:33,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 01:23:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:23:33,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 01:23:33,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-08 01:23:33,029 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2025-02-08 01:23:33,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 61 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:23:33,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:23:33,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2025-02-08 01:23:33,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:23:33,409 INFO L124 PetriNetUnfolderBase]: 381/717 cut-off events. [2025-02-08 01:23:33,410 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2025-02-08 01:23:33,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 717 events. 381/717 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3559 event pairs, 32 based on Foata normal form. 70/658 useless extension candidates. Maximal degree in co-relation 1304. Up to 185 conditions per place. [2025-02-08 01:23:33,416 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 75 selfloop transitions, 18 changer transitions 4/101 dead transitions. [2025-02-08 01:23:33,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 101 transitions, 429 flow [2025-02-08 01:23:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 01:23:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 01:23:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2025-02-08 01:23:33,429 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-02-08 01:23:33,430 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 61 flow. Second operand 11 states and 176 transitions. [2025-02-08 01:23:33,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 101 transitions, 429 flow [2025-02-08 01:23:33,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 101 transitions, 413 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 01:23:33,442 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 167 flow [2025-02-08 01:23:33,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=167, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2025-02-08 01:23:33,448 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2025-02-08 01:23:33,449 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 167 flow [2025-02-08 01:23:33,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:23:33,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:33,450 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:33,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 01:23:33,451 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-08 01:23:33,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash 541724981, now seen corresponding path program 1 times [2025-02-08 01:23:33,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:33,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321224142] [2025-02-08 01:23:33,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:33,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 01:23:33,467 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 01:23:33,467 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:33,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:33,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:23:33,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321224142] [2025-02-08 01:23:33,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321224142] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:23:33,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509747023] [2025-02-08 01:23:33,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:33,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:23:33,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:23:33,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:23:33,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 01:23:33,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 01:23:33,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 01:23:33,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:33,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:33,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 01:23:33,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:23:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:33,655 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:23:33,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509747023] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:23:33,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:23:33,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2025-02-08 01:23:33,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318869057] [2025-02-08 01:23:33,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:23:33,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:23:33,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:23:33,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:23:33,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:23:33,663 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2025-02-08 01:23:33,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 167 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:23:33,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:23:33,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2025-02-08 01:23:33,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:23:33,863 INFO L124 PetriNetUnfolderBase]: 345/702 cut-off events. [2025-02-08 01:23:33,863 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2025-02-08 01:23:33,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1811 conditions, 702 events. 345/702 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3705 event pairs, 68 based on Foata normal form. 22/623 useless extension candidates. Maximal degree in co-relation 1636. Up to 167 conditions per place. [2025-02-08 01:23:33,868 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 72 selfloop transitions, 14 changer transitions 4/97 dead transitions. [2025-02-08 01:23:33,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 502 flow [2025-02-08 01:23:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 01:23:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 01:23:33,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2025-02-08 01:23:33,870 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2025-02-08 01:23:33,870 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 167 flow. Second operand 9 states and 152 transitions. [2025-02-08 01:23:33,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 502 flow [2025-02-08 01:23:33,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 97 transitions, 501 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 01:23:33,876 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 239 flow [2025-02-08 01:23:33,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=239, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2025-02-08 01:23:33,877 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2025-02-08 01:23:33,877 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 239 flow [2025-02-08 01:23:33,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:23:33,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:33,877 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:33,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 01:23:34,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:23:34,082 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-08 01:23:34,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1694683119, now seen corresponding path program 1 times [2025-02-08 01:23:34,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:34,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560230486] [2025-02-08 01:23:34,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:34,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:34,098 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 01:23:34,101 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 01:23:34,102 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:34,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:34,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:23:34,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560230486] [2025-02-08 01:23:34,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560230486] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:23:34,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:23:34,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 01:23:34,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105193851] [2025-02-08 01:23:34,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:23:34,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:23:34,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:23:34,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:23:34,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-08 01:23:34,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-02-08 01:23:34,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:23:34,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:23:34,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-02-08 01:23:34,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:23:34,373 INFO L124 PetriNetUnfolderBase]: 396/836 cut-off events. [2025-02-08 01:23:34,373 INFO L125 PetriNetUnfolderBase]: For 952/954 co-relation queries the response was YES. [2025-02-08 01:23:34,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 836 events. 396/836 cut-off events. For 952/954 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4718 event pairs, 87 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 2090. Up to 290 conditions per place. [2025-02-08 01:23:34,379 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 64 selfloop transitions, 15 changer transitions 1/88 dead transitions. [2025-02-08 01:23:34,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 88 transitions, 640 flow [2025-02-08 01:23:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:23:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:23:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2025-02-08 01:23:34,382 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-02-08 01:23:34,382 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 239 flow. Second operand 7 states and 112 transitions. [2025-02-08 01:23:34,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 88 transitions, 640 flow [2025-02-08 01:23:34,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 628 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 01:23:34,391 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 314 flow [2025-02-08 01:23:34,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2025-02-08 01:23:34,392 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2025-02-08 01:23:34,392 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 314 flow [2025-02-08 01:23:34,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:23:34,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:34,392 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:34,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 01:23:34,393 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-08 01:23:34,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash -995599750, now seen corresponding path program 1 times [2025-02-08 01:23:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:34,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002920938] [2025-02-08 01:23:34,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:34,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:34,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 01:23:34,406 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 01:23:34,406 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:34,406 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:34,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:23:34,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002920938] [2025-02-08 01:23:34,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002920938] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:23:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620299069] [2025-02-08 01:23:34,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:34,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:23:34,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:23:34,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:23:34,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 01:23:34,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 01:23:34,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 01:23:34,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:34,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:34,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 01:23:34,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:23:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:34,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:23:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:34,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620299069] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:23:34,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:23:34,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-08 01:23:34,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096622674] [2025-02-08 01:23:34,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:23:34,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 01:23:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:23:34,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 01:23:34,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-02-08 01:23:34,974 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2025-02-08 01:23:34,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 314 flow. Second operand has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:23:34,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:23:34,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2025-02-08 01:23:34,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:23:35,411 INFO L124 PetriNetUnfolderBase]: 774/1416 cut-off events. [2025-02-08 01:23:35,412 INFO L125 PetriNetUnfolderBase]: For 2076/2092 co-relation queries the response was YES. [2025-02-08 01:23:35,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4643 conditions, 1416 events. 774/1416 cut-off events. For 2076/2092 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7889 event pairs, 99 based on Foata normal form. 2/1281 useless extension candidates. Maximal degree in co-relation 4326. Up to 357 conditions per place. [2025-02-08 01:23:35,448 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 99 selfloop transitions, 22 changer transitions 37/164 dead transitions. [2025-02-08 01:23:35,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 164 transitions, 1300 flow [2025-02-08 01:23:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-08 01:23:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-08 01:23:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 188 transitions. [2025-02-08 01:23:35,449 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48205128205128206 [2025-02-08 01:23:35,450 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 314 flow. Second operand 13 states and 188 transitions. [2025-02-08 01:23:35,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 164 transitions, 1300 flow [2025-02-08 01:23:35,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 164 transitions, 1279 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-08 01:23:35,459 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 422 flow [2025-02-08 01:23:35,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=422, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2025-02-08 01:23:35,460 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2025-02-08 01:23:35,460 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 422 flow [2025-02-08 01:23:35,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:23:35,460 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:35,460 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:35,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 01:23:35,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:23:35,665 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-08 01:23:35,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:35,665 INFO L85 PathProgramCache]: Analyzing trace with hash 149485576, now seen corresponding path program 1 times [2025-02-08 01:23:35,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:35,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30408460] [2025-02-08 01:23:35,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:35,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 01:23:35,678 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 01:23:35,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:35,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:23:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:23:35,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:23:35,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30408460] [2025-02-08 01:23:35,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30408460] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:23:35,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:23:35,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 01:23:35,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3028002] [2025-02-08 01:23:35,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:23:35,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:23:35,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:23:35,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:23:35,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-08 01:23:35,754 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-02-08 01:23:35,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 422 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:23:35,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:23:35,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-02-08 01:23:35,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:23:35,979 INFO L124 PetriNetUnfolderBase]: 552/1173 cut-off events. [2025-02-08 01:23:35,979 INFO L125 PetriNetUnfolderBase]: For 2557/2559 co-relation queries the response was YES. [2025-02-08 01:23:35,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4530 conditions, 1173 events. 552/1173 cut-off events. For 2557/2559 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7142 event pairs, 101 based on Foata normal form. 18/1142 useless extension candidates. Maximal degree in co-relation 4357. Up to 558 conditions per place. [2025-02-08 01:23:35,990 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 58 selfloop transitions, 15 changer transitions 0/82 dead transitions. [2025-02-08 01:23:35,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 82 transitions, 750 flow [2025-02-08 01:23:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:23:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:23:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2025-02-08 01:23:35,993 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2025-02-08 01:23:35,993 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 422 flow. Second operand 6 states and 92 transitions. [2025-02-08 01:23:35,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 82 transitions, 750 flow [2025-02-08 01:23:36,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 693 flow, removed 11 selfloop flow, removed 7 redundant places. [2025-02-08 01:23:36,012 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 419 flow [2025-02-08 01:23:36,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=419, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2025-02-08 01:23:36,015 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2025-02-08 01:23:36,015 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 419 flow [2025-02-08 01:23:36,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:23:36,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:23:36,015 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:23:36,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 01:23:36,016 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-08 01:23:36,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:23:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash -433214106, now seen corresponding path program 1 times [2025-02-08 01:23:36,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:23:36,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642994619] [2025-02-08 01:23:36,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:23:36,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:23:36,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 01:23:36,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 01:23:36,026 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:36,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 01:23:36,026 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 01:23:36,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 01:23:36,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 01:23:36,034 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:23:36,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 01:23:36,047 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 01:23:36,048 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 01:23:36,048 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2025-02-08 01:23:36,050 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2025-02-08 01:23:36,051 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2025-02-08 01:23:36,051 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-02-08 01:23:36,052 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-02-08 01:23:36,052 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-02-08 01:23:36,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 01:23:36,052 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2025-02-08 01:23:36,083 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-08 01:23:36,083 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 01:23:36,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 01:23:36 BasicIcfg [2025-02-08 01:23:36,087 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 01:23:36,088 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 01:23:36,088 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 01:23:36,088 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 01:23:36,089 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:23:32" (3/4) ... [2025-02-08 01:23:36,089 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-02-08 01:23:36,146 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 7. [2025-02-08 01:23:36,177 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-08 01:23:36,177 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-08 01:23:36,177 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 01:23:36,178 INFO L158 Benchmark]: Toolchain (without parser) took 4541.51ms. Allocated memory was 142.6MB in the beginning and 310.4MB in the end (delta: 167.8MB). Free memory was 105.0MB in the beginning and 187.8MB in the end (delta: -82.8MB). Peak memory consumption was 85.8MB. Max. memory is 16.1GB. [2025-02-08 01:23:36,178 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 128.2MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 01:23:36,178 INFO L158 Benchmark]: CACSL2BoogieTranslator took 398.61ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 84.6MB in the end (delta: 20.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-02-08 01:23:36,178 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.68ms. Allocated memory is still 142.6MB. Free memory was 84.6MB in the beginning and 82.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 01:23:36,179 INFO L158 Benchmark]: Boogie Preprocessor took 38.75ms. Allocated memory is still 142.6MB. Free memory was 82.8MB in the beginning and 81.9MB in the end (delta: 900.3kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 01:23:36,179 INFO L158 Benchmark]: IcfgBuilder took 367.83ms. Allocated memory is still 142.6MB. Free memory was 81.9MB in the beginning and 60.6MB in the end (delta: 21.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-08 01:23:36,179 INFO L158 Benchmark]: TraceAbstraction took 3606.69ms. Allocated memory was 142.6MB in the beginning and 310.4MB in the end (delta: 167.8MB). Free memory was 60.3MB in the beginning and 193.9MB in the end (delta: -133.5MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. [2025-02-08 01:23:36,183 INFO L158 Benchmark]: Witness Printer took 89.49ms. Allocated memory is still 310.4MB. Free memory was 193.9MB in the beginning and 187.8MB in the end (delta: 6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 01:23:36,184 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 128.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 398.61ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 84.6MB in the end (delta: 20.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.68ms. Allocated memory is still 142.6MB. Free memory was 84.6MB in the beginning and 82.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.75ms. Allocated memory is still 142.6MB. Free memory was 82.8MB in the beginning and 81.9MB in the end (delta: 900.3kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 367.83ms. Allocated memory is still 142.6MB. Free memory was 81.9MB in the beginning and 60.6MB in the end (delta: 21.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 3606.69ms. Allocated memory was 142.6MB in the beginning and 310.4MB in the end (delta: 167.8MB). Free memory was 60.3MB in the beginning and 193.9MB in the end (delta: -133.5MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. * Witness Printer took 89.49ms. Allocated memory is still 310.4MB. Free memory was 193.9MB in the beginning and 187.8MB in the end (delta: 6.1MB). 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; [L775] 0 _N = __VERIFIER_nondet_int() [L776] CALL 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L750] COND FALSE 0 !(!cond) [L776] RET 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L777] 0 pthread_t t1, t2; [L778] FCALL, FORK 0 pthread_create(&t1, 0, f1, 0) VAL [_N=0, limit=0, t1=-1] [L757] 1 int i, bound; [L758] 1 int lim = _N; VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=0, limit=0] [L779] FCALL, FORK 0 pthread_create(&t2, 0, f2, 0) VAL [_N=0, limit=0, t1=-1, t2=0] [L766] 2 int i, bound; [L767] 2 int lim = _N + 1; VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=1, limit=0] [L768] 2 limit = lim VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=1, limit=1] [L759] 1 limit = lim VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=0, limit=0] [L769] 2 bound = limit [L770] 2 i = 0 VAL [\old(arg)={0:0}, _N=0, arg={0:0}, bound=0, i=0, lim=1, limit=0] [L770] COND FALSE 2 !(i < bound) [L771] CALL 2 __VERIFIER_assert(i == lim) [L753] COND TRUE 2 !expression VAL [\old(expression)=0, _N=0, expression=0, limit=0] [L753] 2 reach_error() VAL [\old(expression)=0, _N=0, expression=0, limit=0] - UnprovableResult [Line: 778]: 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: 779]: 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: 753]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 47 locations, 6 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: 3.5s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 485 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 482 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 41 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1007 IncrementalHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 5 mSDtfsCounter, 1007 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=422occurred in iteration=4, InterpolantAutomatonStates: 46, 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, 1.1s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 320 SizeOfPredicates, 11 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 1/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-02-08 01:23:36,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE