./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52eeb5cce5645e9dacc261319eae3d665b5cc432ff3ddd2ef39502a44996e68d --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:33:07,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:33:07,044 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:33:07,053 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:33:07,053 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:33:07,071 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:33:07,071 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:33:07,071 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:33:07,072 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:33:07,072 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:33:07,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:33:07,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:33:07,072 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:33:07,072 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:33:07,072 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:33:07,073 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:33:07,073 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:33:07,074 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:33:07,074 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:33:07,074 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:33:07,074 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 52eeb5cce5645e9dacc261319eae3d665b5cc432ff3ddd2ef39502a44996e68d [2025-02-08 08:33:07,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:33:07,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:33:07,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:33:07,319 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:33:07,320 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:33:07,321 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2025-02-08 08:33:08,491 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9bf3ef46c/1f4731bb12874112a1308119a7d39a6a/FLAG28f6e71a7 [2025-02-08 08:33:08,729 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:33:08,735 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2025-02-08 08:33:08,747 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9bf3ef46c/1f4731bb12874112a1308119a7d39a6a/FLAG28f6e71a7 [2025-02-08 08:33:09,060 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9bf3ef46c/1f4731bb12874112a1308119a7d39a6a [2025-02-08 08:33:09,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:33:09,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:33:09,066 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:33:09,067 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:33:09,071 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:33:09,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d770c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09, skipping insertion in model container [2025-02-08 08:33:09,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,090 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:33:09,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:33:09,233 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:33:09,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:33:09,254 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:33:09,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09 WrapperNode [2025-02-08 08:33:09,255 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:33:09,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:33:09,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:33:09,256 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:33:09,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,280 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 49 [2025-02-08 08:33:09,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:33:09,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:33:09,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:33:09,282 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:33:09,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,296 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,307 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 08:33:09,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,307 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,309 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,310 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,310 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,310 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:33:09,312 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:33:09,312 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:33:09,312 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:33:09,313 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (1/1) ... [2025-02-08 08:33:09,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:33:09,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:09,337 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 08:33:09,339 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 08:33:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:33:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:33:09,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:33:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:33:09,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:33:09,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:33:09,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:33:09,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:33:09,359 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 08:33:09,413 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:33:09,414 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:33:09,550 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:33:09,550 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:33:09,649 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:33:09,649 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:33:09,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:33:09 BoogieIcfgContainer [2025-02-08 08:33:09,649 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:33:09,651 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:33:09,651 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:33:09,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:33:09,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:33:09" (1/3) ... [2025-02-08 08:33:09,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94b500d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:33:09, skipping insertion in model container [2025-02-08 08:33:09,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:09" (2/3) ... [2025-02-08 08:33:09,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94b500d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:33:09, skipping insertion in model container [2025-02-08 08:33:09,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:33:09" (3/3) ... [2025-02-08 08:33:09,658 INFO L128 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2025-02-08 08:33:09,668 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:33:09,669 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bench-exp1x3.wvr.c that has 3 procedures, 19 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-02-08 08:33:09,669 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:33:09,711 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-08 08:33:09,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 20 transitions, 54 flow [2025-02-08 08:33:09,763 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2025-02-08 08:33:09,765 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:33:09,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 2/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-02-08 08:33:09,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 20 transitions, 54 flow [2025-02-08 08:33:09,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 17 transitions, 46 flow [2025-02-08 08:33:09,777 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:33:09,786 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=None, 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;@46a4bab9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:33:09,787 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-08 08:33:09,793 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:33:09,793 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2025-02-08 08:33:09,793 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:33:09,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:09,794 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:09,794 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:33:09,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:09,799 INFO L85 PathProgramCache]: Analyzing trace with hash 521320012, now seen corresponding path program 1 times [2025-02-08 08:33:09,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:09,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333463231] [2025-02-08 08:33:09,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:09,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:09,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:33:09,876 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:33:09,876 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:09,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:10,028 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 08:33:10,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:10,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333463231] [2025-02-08 08:33:10,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333463231] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:10,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:10,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:33:10,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427443796] [2025-02-08 08:33:10,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:10,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:33:10,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:10,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:33:10,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:33:10,058 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 20 [2025-02-08 08:33:10,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:33:10,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:10,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 20 [2025-02-08 08:33:10,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:10,138 INFO L124 PetriNetUnfolderBase]: 59/104 cut-off events. [2025-02-08 08:33:10,138 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-02-08 08:33:10,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 104 events. 59/104 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 280 event pairs, 8 based on Foata normal form. 2/69 useless extension candidates. Maximal degree in co-relation 179. Up to 77 conditions per place. [2025-02-08 08:33:10,140 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 17 selfloop transitions, 3 changer transitions 1/24 dead transitions. [2025-02-08 08:33:10,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 111 flow [2025-02-08 08:33:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:33:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:33:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-02-08 08:33:10,150 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2025-02-08 08:33:10,151 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 3 states and 41 transitions. [2025-02-08 08:33:10,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 111 flow [2025-02-08 08:33:10,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 97 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:33:10,156 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2025-02-08 08:33:10,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2025-02-08 08:33:10,160 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2025-02-08 08:33:10,161 INFO L471 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2025-02-08 08:33:10,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:33:10,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:10,161 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:10,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:33:10,162 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:33:10,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:10,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1019999254, now seen corresponding path program 1 times [2025-02-08 08:33:10,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:10,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277541592] [2025-02-08 08:33:10,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:10,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:10,170 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:33:10,180 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:10,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:10,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:10,298 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 08:33:10,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:10,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277541592] [2025-02-08 08:33:10,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277541592] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:10,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:10,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:10,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337805236] [2025-02-08 08:33:10,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:10,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:33:10,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:10,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:33:10,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:33:10,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 20 [2025-02-08 08:33:10,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 08:33:10,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:10,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 20 [2025-02-08 08:33:10,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:10,381 INFO L124 PetriNetUnfolderBase]: 56/100 cut-off events. [2025-02-08 08:33:10,381 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2025-02-08 08:33:10,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 100 events. 56/100 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 238 event pairs, 1 based on Foata normal form. 3/101 useless extension candidates. Maximal degree in co-relation 72. Up to 46 conditions per place. [2025-02-08 08:33:10,383 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 18 selfloop transitions, 6 changer transitions 7/34 dead transitions. [2025-02-08 08:33:10,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 34 transitions, 159 flow [2025-02-08 08:33:10,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2025-02-08 08:33:10,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-02-08 08:33:10,384 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 5 states and 62 transitions. [2025-02-08 08:33:10,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 34 transitions, 159 flow [2025-02-08 08:33:10,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 34 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:10,385 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 74 flow [2025-02-08 08:33:10,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2025-02-08 08:33:10,385 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2025-02-08 08:33:10,385 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 74 flow [2025-02-08 08:33:10,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 08:33:10,385 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:10,386 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:10,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:33:10,386 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:33:10,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:10,386 INFO L85 PathProgramCache]: Analyzing trace with hash -81669676, now seen corresponding path program 1 times [2025-02-08 08:33:10,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:10,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636382746] [2025-02-08 08:33:10,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:10,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:10,391 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:33:10,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:10,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:10,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:10,498 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 08:33:10,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:10,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636382746] [2025-02-08 08:33:10,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636382746] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:10,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094927667] [2025-02-08 08:33:10,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:10,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:10,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:10,504 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 08:33:10,505 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 08:33:10,546 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:33:10,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:10,564 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:10,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:10,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-08 08:33:10,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:10,722 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 08:33:10,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:10,787 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 08:33:10,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094927667] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:10,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:10,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-02-08 08:33:10,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404554499] [2025-02-08 08:33:10,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:10,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:33:10,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:10,788 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:33:10,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:33:10,788 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 20 [2025-02-08 08:33:10,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 74 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 08:33:10,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:10,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 20 [2025-02-08 08:33:10,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:10,908 INFO L124 PetriNetUnfolderBase]: 47/94 cut-off events. [2025-02-08 08:33:10,908 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2025-02-08 08:33:10,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 94 events. 47/94 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 232 event pairs, 5 based on Foata normal form. 5/97 useless extension candidates. Maximal degree in co-relation 83. Up to 48 conditions per place. [2025-02-08 08:33:10,909 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 23 selfloop transitions, 7 changer transitions 3/36 dead transitions. [2025-02-08 08:33:10,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 36 transitions, 192 flow [2025-02-08 08:33:10,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-02-08 08:33:10,911 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2025-02-08 08:33:10,911 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 74 flow. Second operand 5 states and 64 transitions. [2025-02-08 08:33:10,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 36 transitions, 192 flow [2025-02-08 08:33:10,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:10,912 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 110 flow [2025-02-08 08:33:10,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2025-02-08 08:33:10,915 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2025-02-08 08:33:10,915 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 110 flow [2025-02-08 08:33:10,915 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 08:33:10,915 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:10,916 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:10,923 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 08:33:11,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:11,120 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:33:11,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash 625562456, now seen corresponding path program 2 times [2025-02-08 08:33:11,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:11,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396720535] [2025-02-08 08:33:11,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:11,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:11,129 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-08 08:33:11,141 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:11,141 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:11,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:11,197 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 08:33:11,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:11,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396720535] [2025-02-08 08:33:11,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396720535] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:11,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:11,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:11,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912194054] [2025-02-08 08:33:11,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:11,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:33:11,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:11,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:33:11,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:33:11,199 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 20 [2025-02-08 08:33:11,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 08:33:11,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:11,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 20 [2025-02-08 08:33:11,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:11,261 INFO L124 PetriNetUnfolderBase]: 43/82 cut-off events. [2025-02-08 08:33:11,261 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2025-02-08 08:33:11,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 82 events. 43/82 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 183 event pairs, 0 based on Foata normal form. 2/82 useless extension candidates. Maximal degree in co-relation 169. Up to 36 conditions per place. [2025-02-08 08:33:11,262 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 20 selfloop transitions, 5 changer transitions 5/33 dead transitions. [2025-02-08 08:33:11,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 204 flow [2025-02-08 08:33:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2025-02-08 08:33:11,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2025-02-08 08:33:11,263 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 110 flow. Second operand 5 states and 58 transitions. [2025-02-08 08:33:11,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 204 flow [2025-02-08 08:33:11,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 197 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:11,264 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 100 flow [2025-02-08 08:33:11,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2025-02-08 08:33:11,265 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2025-02-08 08:33:11,265 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 100 flow [2025-02-08 08:33:11,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 08:33:11,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:11,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:11,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:33:11,269 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:33:11,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:11,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1215013372, now seen corresponding path program 2 times [2025-02-08 08:33:11,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:11,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870224508] [2025-02-08 08:33:11,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:11,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:11,275 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-08 08:33:11,279 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:11,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:11,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:11,347 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 08:33:11,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870224508] [2025-02-08 08:33:11,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870224508] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877838348] [2025-02-08 08:33:11,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:33:11,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:11,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:11,351 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 08:33:11,352 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 08:33:11,379 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-08 08:33:11,391 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:11,391 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:33:11,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:11,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-08 08:33:11,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:11,520 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 08:33:11,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:11,573 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 08:33:11,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877838348] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:11,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:11,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-02-08 08:33:11,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544900057] [2025-02-08 08:33:11,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:11,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:33:11,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:11,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:33:11,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:33:11,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 20 [2025-02-08 08:33:11,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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 08:33:11,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:11,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 20 [2025-02-08 08:33:11,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:11,645 INFO L124 PetriNetUnfolderBase]: 37/70 cut-off events. [2025-02-08 08:33:11,645 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-02-08 08:33:11,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 70 events. 37/70 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 133 event pairs, 2 based on Foata normal form. 4/73 useless extension candidates. Maximal degree in co-relation 129. Up to 55 conditions per place. [2025-02-08 08:33:11,646 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 20 selfloop transitions, 6 changer transitions 0/29 dead transitions. [2025-02-08 08:33:11,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 185 flow [2025-02-08 08:33:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2025-02-08 08:33:11,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-02-08 08:33:11,648 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 100 flow. Second operand 5 states and 55 transitions. [2025-02-08 08:33:11,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 185 flow [2025-02-08 08:33:11,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 175 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-02-08 08:33:11,653 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 131 flow [2025-02-08 08:33:11,653 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2025-02-08 08:33:11,653 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2025-02-08 08:33:11,653 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 131 flow [2025-02-08 08:33:11,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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 08:33:11,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:11,653 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:11,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:11,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:11,854 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:33:11,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1584044702, now seen corresponding path program 1 times [2025-02-08 08:33:11,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:11,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131480614] [2025-02-08 08:33:11,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:11,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:11,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:33:11,878 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:33:11,878 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:11,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:33:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131480614] [2025-02-08 08:33:12,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131480614] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:12,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790011700] [2025-02-08 08:33:12,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:12,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:12,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:12,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:33:12,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 08:33:12,198 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:33:12,237 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:33:12,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:12,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:12,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-08 08:33:12,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:06,241 WARN L286 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-08 08:34:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:34:19,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:34:39,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790011700] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:34:39,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:34:39,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2025-02-08 08:34:39,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605221731] [2025-02-08 08:34:39,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:34:39,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:34:39,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:39,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:34:39,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=170, Unknown=12, NotChecked=0, Total=240 [2025-02-08 08:34:39,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 20 [2025-02-08 08:34:39,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 131 flow. Second operand has 16 states, 16 states have (on average 7.9375) internal successors, (127), 16 states have internal predecessors, (127), 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 08:34:39,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:39,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 20 [2025-02-08 08:34:39,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:52,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []