./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-11.i --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/pthread/fib_unsafe-11.i -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 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:09:31,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:09:31,909 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:09:31,913 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:09:31,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:09:31,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:09:31,931 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:09:31,931 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:09:31,932 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:09:31,932 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:09:31,932 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:09:31,932 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:09:31,932 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:09:31,933 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:09:31,933 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:09:31,933 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:09:31,934 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:09:31,935 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:09:31,935 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:09:31,935 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:09:31,935 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:09:31,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:09:31,935 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:09:31,935 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:09:31,935 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:09:31,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:09:31,935 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:09:31,935 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:09:31,935 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:09:31,936 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:09:31,936 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 -> 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 [2025-02-08 08:09:32,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:09:32,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:09:32,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:09:32,201 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:09:32,202 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:09:32,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-11.i [2025-02-08 08:09:33,462 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e60ee1d5a/554bb22e506443b1adbca92ca8929591/FLAGfcfe61320 [2025-02-08 08:09:33,696 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:09:33,703 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-11.i [2025-02-08 08:09:33,715 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e60ee1d5a/554bb22e506443b1adbca92ca8929591/FLAGfcfe61320 [2025-02-08 08:09:33,725 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e60ee1d5a/554bb22e506443b1adbca92ca8929591 [2025-02-08 08:09:33,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:09:33,728 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:09:33,729 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:09:33,729 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:09:33,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:09:33,732 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:33,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c9b89d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33, skipping insertion in model container [2025-02-08 08:09:33,733 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:33,748 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:09:33,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:09:33,900 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:09:33,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:09:33,949 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:09:33,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33 WrapperNode [2025-02-08 08:09:33,950 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:09:33,951 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:09:33,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:09:33,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:09:33,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:33,965 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:33,981 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2025-02-08 08:09:33,982 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:09:33,983 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:09:33,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:09:33,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:09:33,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:33,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:33,990 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:33,998 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 08:09:33,998 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:33,998 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:34,001 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:34,001 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:34,002 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:34,002 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:34,003 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:09:34,004 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:09:34,004 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:09:34,004 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:09:34,005 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (1/1) ... [2025-02-08 08:09:34,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:09:34,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:34,027 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 08:09:34,032 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 08:09:34,043 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-02-08 08:09:34,043 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-02-08 08:09:34,043 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-02-08 08:09:34,043 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-02-08 08:09:34,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:09:34,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:09:34,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:09:34,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:09:34,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:09:34,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:09:34,045 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 08:09:34,117 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:09:34,118 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:09:34,215 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:09:34,215 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:09:34,278 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:09:34,278 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:09:34,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:09:34 BoogieIcfgContainer [2025-02-08 08:09:34,278 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:09:34,280 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:09:34,280 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:09:34,283 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:09:34,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:09:33" (1/3) ... [2025-02-08 08:09:34,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff3a4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:09:34, skipping insertion in model container [2025-02-08 08:09:34,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:09:33" (2/3) ... [2025-02-08 08:09:34,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff3a4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:09:34, skipping insertion in model container [2025-02-08 08:09:34,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:09:34" (3/3) ... [2025-02-08 08:09:34,284 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2025-02-08 08:09:34,293 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:09:34,293 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-11.i that has 3 procedures, 30 locations, 1 initial locations, 3 loop locations, and 2 error locations. [2025-02-08 08:09:34,294 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:09:34,317 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:09:34,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 76 flow [2025-02-08 08:09:34,352 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-02-08 08:09:34,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:09:34,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 5/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-02-08 08:09:34,355 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 76 flow [2025-02-08 08:09:34,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 32 transitions, 70 flow [2025-02-08 08:09:34,362 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:09:34,368 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;@5f345fba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:09:34,369 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-08 08:09:34,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:09:34,380 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2025-02-08 08:09:34,380 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:09:34,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:34,380 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:09:34,381 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:09:34,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash -782702448, now seen corresponding path program 1 times [2025-02-08 08:09:34,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:09:34,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586097188] [2025-02-08 08:09:34,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:09:34,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:09:34,445 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:09:34,463 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:09:34,464 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:09:34,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:34,571 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 08:09:34,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:09:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586097188] [2025-02-08 08:09:34,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586097188] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:09:34,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:09:34,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:09:34,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996004550] [2025-02-08 08:09:34,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:09:34,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:09:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:09:34,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:09:34,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:09:34,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-08 08:09:34,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 08:09:34,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:34,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-08 08:09:34,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:34,739 INFO L124 PetriNetUnfolderBase]: 297/523 cut-off events. [2025-02-08 08:09:34,739 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:09:34,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 523 events. 297/523 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2146 event pairs, 39 based on Foata normal form. 32/534 useless extension candidates. Maximal degree in co-relation 974. Up to 353 conditions per place. [2025-02-08 08:09:34,744 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 29 selfloop transitions, 2 changer transitions 1/38 dead transitions. [2025-02-08 08:09:34,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 146 flow [2025-02-08 08:09:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:09:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:09:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2025-02-08 08:09:34,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2025-02-08 08:09:34,752 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 59 transitions. [2025-02-08 08:09:34,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 146 flow [2025-02-08 08:09:34,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:09:34,757 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 72 flow [2025-02-08 08:09:34,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2025-02-08 08:09:34,760 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2025-02-08 08:09:34,760 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 72 flow [2025-02-08 08:09:34,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 08:09:34,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:34,761 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:09:34,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:09:34,761 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:09:34,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:34,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1732255421, now seen corresponding path program 1 times [2025-02-08 08:09:34,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:09:34,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036996770] [2025-02-08 08:09:34,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:09:34,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:09:34,770 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:09:34,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:09:34,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:09:34,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:34,837 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 08:09:34,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:09:34,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036996770] [2025-02-08 08:09:34,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036996770] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:09:34,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775706314] [2025-02-08 08:09:34,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:09:34,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:34,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:34,840 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 08:09:34,841 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 08:09:34,885 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:09:34,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:09:34,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:09:34,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:34,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-08 08:09:34,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:09:34,924 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:09:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775706314] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:09:34,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:09:34,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2025-02-08 08:09:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731155563] [2025-02-08 08:09:34,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:09:34,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:09:34,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:09:34,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:09:34,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:09:34,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-08 08:09:34,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 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 08:09:34,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:34,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-08 08:09:34,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:34,980 INFO L124 PetriNetUnfolderBase]: 265/459 cut-off events. [2025-02-08 08:09:34,980 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-08 08:09:34,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 459 events. 265/459 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1777 event pairs, 183 based on Foata normal form. 16/454 useless extension candidates. Maximal degree in co-relation 926. Up to 405 conditions per place. [2025-02-08 08:09:34,985 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 21 selfloop transitions, 1 changer transitions 1/28 dead transitions. [2025-02-08 08:09:34,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 116 flow [2025-02-08 08:09:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:09:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:09:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2025-02-08 08:09:34,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2025-02-08 08:09:34,986 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 72 flow. Second operand 3 states and 44 transitions. [2025-02-08 08:09:34,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 116 flow [2025-02-08 08:09:34,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:09:34,987 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 68 flow [2025-02-08 08:09:34,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2025-02-08 08:09:34,988 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2025-02-08 08:09:34,988 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 68 flow [2025-02-08 08:09:34,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 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 08:09:34,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:34,988 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:09:34,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-08 08:09:35,192 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 08:09:35,193 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:09:35,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1732256997, now seen corresponding path program 1 times [2025-02-08 08:09:35,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:09:35,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519546402] [2025-02-08 08:09:35,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:09:35,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:09:35,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:09:35,205 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:09:35,205 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:09:35,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:35,244 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 08:09:35,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:09:35,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519546402] [2025-02-08 08:09:35,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519546402] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:09:35,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102380905] [2025-02-08 08:09:35,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:09:35,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:35,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:35,249 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 08:09:35,249 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 08:09:35,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:09:35,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:09:35,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:09:35,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:35,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-08 08:09:35,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:35,315 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 08:09:35,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:35,332 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 08:09:35,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102380905] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:35,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:09:35,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-08 08:09:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722856935] [2025-02-08 08:09:35,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:35,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:09:35,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:09:35,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:09:35,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-08 08:09:35,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-08 08:09:35,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 68 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 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 08:09:35,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:35,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-08 08:09:35,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:35,483 INFO L124 PetriNetUnfolderBase]: 329/555 cut-off events. [2025-02-08 08:09:35,484 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-08 08:09:35,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 555 events. 329/555 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2089 event pairs, 39 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1160. Up to 257 conditions per place. [2025-02-08 08:09:35,491 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 52 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2025-02-08 08:09:35,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 258 flow [2025-02-08 08:09:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:09:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:09:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2025-02-08 08:09:35,494 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2025-02-08 08:09:35,494 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 68 flow. Second operand 6 states and 108 transitions. [2025-02-08 08:09:35,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 258 flow [2025-02-08 08:09:35,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:09:35,497 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 103 flow [2025-02-08 08:09:35,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2025-02-08 08:09:35,497 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2025-02-08 08:09:35,499 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 103 flow [2025-02-08 08:09:35,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 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 08:09:35,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:35,499 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:09:35,506 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 08:09:35,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:35,701 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:09:35,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:35,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1400139272, now seen corresponding path program 2 times [2025-02-08 08:09:35,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:09:35,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593566880] [2025-02-08 08:09:35,703 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:09:35,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:09:35,718 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-08 08:09:35,746 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:09:35,748 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:09:35,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:35,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:09:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593566880] [2025-02-08 08:09:35,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593566880] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:09:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343776945] [2025-02-08 08:09:35,865 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:09:35,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:35,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:35,867 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 08:09:35,873 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 08:09:35,934 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-08 08:09:35,954 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:09:35,955 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:09:35,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:35,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 08:09:35,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:35,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:36,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343776945] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:36,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:09:36,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-02-08 08:09:36,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266893748] [2025-02-08 08:09:36,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:36,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:09:36,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:09:36,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:09:36,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:09:36,041 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-08 08:09:36,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 103 flow. Second operand has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 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 08:09:36,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:36,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-08 08:09:36,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:36,250 INFO L124 PetriNetUnfolderBase]: 521/843 cut-off events. [2025-02-08 08:09:36,254 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-02-08 08:09:36,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 843 events. 521/843 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3087 event pairs, 39 based on Foata normal form. 96/934 useless extension candidates. Maximal degree in co-relation 2104. Up to 257 conditions per place. [2025-02-08 08:09:36,260 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 100 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2025-02-08 08:09:36,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 116 transitions, 521 flow [2025-02-08 08:09:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-08 08:09:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-08 08:09:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2025-02-08 08:09:36,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5220588235294118 [2025-02-08 08:09:36,262 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 103 flow. Second operand 12 states and 213 transitions. [2025-02-08 08:09:36,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 116 transitions, 521 flow [2025-02-08 08:09:36,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 116 transitions, 507 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-08 08:09:36,269 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 173 flow [2025-02-08 08:09:36,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2025-02-08 08:09:36,270 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2025-02-08 08:09:36,270 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 173 flow [2025-02-08 08:09:36,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 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 08:09:36,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:36,271 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:09:36,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 08:09:36,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:36,472 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:09:36,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:36,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1716632280, now seen corresponding path program 3 times [2025-02-08 08:09:36,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:09:36,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456349535] [2025-02-08 08:09:36,474 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:09:36,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:09:36,485 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 6 equivalence classes. [2025-02-08 08:09:36,528 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:09:36,529 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-08 08:09:36,529 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:36,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:09:36,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456349535] [2025-02-08 08:09:36,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456349535] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:09:36,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133936514] [2025-02-08 08:09:36,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:09:36,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:36,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:36,735 INFO L229 MonitoredProcess]: Starting monitored process 5 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 08:09:36,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 08:09:36,775 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 6 equivalence classes. [2025-02-08 08:09:36,799 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:09:36,799 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-08 08:09:36,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:36,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:09:36,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:36,852 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:37,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133936514] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:37,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:09:37,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-02-08 08:09:37,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5896685] [2025-02-08 08:09:37,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:37,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-08 08:09:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:09:37,135 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-08 08:09:37,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-08 08:09:37,136 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-08 08:09:37,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 173 flow. Second operand has 25 states, 25 states have (on average 9.44) internal successors, (236), 25 states have internal predecessors, (236), 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 08:09:37,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:37,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-08 08:09:37,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:37,491 INFO L124 PetriNetUnfolderBase]: 905/1419 cut-off events. [2025-02-08 08:09:37,491 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-02-08 08:09:37,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 1419 events. 905/1419 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5226 event pairs, 39 based on Foata normal form. 192/1606 useless extension candidates. Maximal degree in co-relation 4104. Up to 337 conditions per place. [2025-02-08 08:09:37,499 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 196 selfloop transitions, 23 changer transitions 0/224 dead transitions. [2025-02-08 08:09:37,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 224 transitions, 1059 flow [2025-02-08 08:09:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-08 08:09:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-02-08 08:09:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 423 transitions. [2025-02-08 08:09:37,502 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5183823529411765 [2025-02-08 08:09:37,502 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 173 flow. Second operand 24 states and 423 transitions. [2025-02-08 08:09:37,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 224 transitions, 1059 flow [2025-02-08 08:09:37,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 224 transitions, 987 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-02-08 08:09:37,511 INFO L231 Difference]: Finished difference. Result has 85 places, 48 transitions, 293 flow [2025-02-08 08:09:37,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=293, PETRI_PLACES=85, PETRI_TRANSITIONS=48} [2025-02-08 08:09:37,512 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 51 predicate places. [2025-02-08 08:09:37,512 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 48 transitions, 293 flow [2025-02-08 08:09:37,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.44) internal successors, (236), 25 states have internal predecessors, (236), 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 08:09:37,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:37,512 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:09:37,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 08:09:37,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:37,717 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:09:37,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:37,718 INFO L85 PathProgramCache]: Analyzing trace with hash -490892136, now seen corresponding path program 4 times [2025-02-08 08:09:37,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:09:37,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821030878] [2025-02-08 08:09:37,719 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:09:37,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:09:37,728 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-02-08 08:09:37,755 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:09:37,759 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:09:37,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:38,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:09:38,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821030878] [2025-02-08 08:09:38,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821030878] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:09:38,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684393191] [2025-02-08 08:09:38,136 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:09:38,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:38,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:38,140 INFO L229 MonitoredProcess]: Starting monitored process 6 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 08:09:38,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 08:09:38,210 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-02-08 08:09:38,239 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:09:38,239 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:09:38,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:38,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-08 08:09:38,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:38,314 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:38,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684393191] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:38,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:09:38,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 26 [2025-02-08 08:09:38,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163175268] [2025-02-08 08:09:38,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:38,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-08 08:09:38,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:09:38,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-08 08:09:38,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2025-02-08 08:09:38,615 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-08 08:09:38,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 48 transitions, 293 flow. Second operand has 26 states, 26 states have (on average 9.423076923076923) internal successors, (245), 26 states have internal predecessors, (245), 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 08:09:38,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:38,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-08 08:09:38,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:39,017 INFO L124 PetriNetUnfolderBase]: 969/1515 cut-off events. [2025-02-08 08:09:39,017 INFO L125 PetriNetUnfolderBase]: For 9868/9868 co-relation queries the response was YES. [2025-02-08 08:09:39,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4615 conditions, 1515 events. 969/1515 cut-off events. For 9868/9868 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5509 event pairs, 39 based on Foata normal form. 32/1542 useless extension candidates. Maximal degree in co-relation 4584. Up to 273 conditions per place. [2025-02-08 08:09:39,029 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 212 selfloop transitions, 25 changer transitions 0/242 dead transitions. [2025-02-08 08:09:39,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 242 transitions, 1167 flow [2025-02-08 08:09:39,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-08 08:09:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-08 08:09:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 447 transitions. [2025-02-08 08:09:39,031 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.505656108597285 [2025-02-08 08:09:39,031 INFO L175 Difference]: Start difference. First operand has 85 places, 48 transitions, 293 flow. Second operand 26 states and 447 transitions. [2025-02-08 08:09:39,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 242 transitions, 1167 flow [2025-02-08 08:09:39,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 242 transitions, 1067 flow, removed 39 selfloop flow, removed 11 redundant places. [2025-02-08 08:09:39,047 INFO L231 Difference]: Finished difference. Result has 101 places, 50 transitions, 269 flow [2025-02-08 08:09:39,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=269, PETRI_PLACES=101, PETRI_TRANSITIONS=50} [2025-02-08 08:09:39,048 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 67 predicate places. [2025-02-08 08:09:39,048 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 50 transitions, 269 flow [2025-02-08 08:09:39,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.423076923076923) internal successors, (245), 26 states have internal predecessors, (245), 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 08:09:39,048 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:39,048 INFO L206 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:09:39,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-08 08:09:39,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:39,249 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:09:39,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash -653106632, now seen corresponding path program 5 times [2025-02-08 08:09:39,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:09:39,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399503716] [2025-02-08 08:09:39,250 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:09:39,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:09:39,257 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 13 equivalence classes. [2025-02-08 08:09:39,363 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 38 of 38 statements. [2025-02-08 08:09:39,363 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-08 08:09:39,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:41,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:09:41,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399503716] [2025-02-08 08:09:41,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399503716] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:09:41,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982472113] [2025-02-08 08:09:41,377 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:09:41,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:41,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:41,379 INFO L229 MonitoredProcess]: Starting monitored process 7 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 08:09:41,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 08:09:41,417 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 13 equivalence classes. [2025-02-08 08:09:41,462 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 38 of 38 statements. [2025-02-08 08:09:41,462 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-08 08:09:41,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:41,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-02-08 08:09:41,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:43,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:44,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982472113] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:44,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:09:44,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2025-02-08 08:09:44,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128037190] [2025-02-08 08:09:44,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:44,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2025-02-08 08:09:44,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:09:44,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2025-02-08 08:09:44,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1168, Invalid=7204, Unknown=0, NotChecked=0, Total=8372 [2025-02-08 08:09:44,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-08 08:09:44,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 50 transitions, 269 flow. Second operand has 92 states, 92 states have (on average 8.173913043478262) internal successors, (752), 92 states have internal predecessors, (752), 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 08:09:44,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:44,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-08 08:09:44,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand