./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc 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/popl20-bad-threaded-sum-2.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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:06:12,102 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:06:12,178 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:06:12,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:06:12,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:06:12,212 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:06:12,213 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:06:12,214 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:06:12,214 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:06:12,214 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:06:12,215 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:06:12,215 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:06:12,216 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:06:12,216 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:06:12,216 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:06:12,216 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:06:12,216 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:06:12,217 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:06:12,217 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:06:12,217 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:06:12,217 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:06:12,217 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:06:12,217 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:06:12,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:06:12,217 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:06:12,218 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:06:12,218 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:06:12,218 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:06:12,218 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:06:12,218 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:06:12,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:06:12,218 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:06:12,219 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:06:12,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:06:12,219 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:06:12,219 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:06:12,219 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:06:12,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:06:12,219 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:06:12,220 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:06:12,220 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:06:12,220 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:06:12,220 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 -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2025-02-06 13:06:12,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:06:12,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:06:12,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:06:12,513 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:06:12,513 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:06:12,514 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2025-02-06 13:06:13,780 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c9f7f0ea4/f30726c9de9742bbab4990cc4c750437/FLAG6de442da3 [2025-02-06 13:06:14,048 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:06:14,064 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2025-02-06 13:06:14,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c9f7f0ea4/f30726c9de9742bbab4990cc4c750437/FLAG6de442da3 [2025-02-06 13:06:14,101 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c9f7f0ea4/f30726c9de9742bbab4990cc4c750437 [2025-02-06 13:06:14,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:06:14,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:06:14,106 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:06:14,106 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:06:14,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:06:14,111 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,113 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c881f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14, skipping insertion in model container [2025-02-06 13:06:14,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,131 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:06:14,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:06:14,297 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:06:14,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:06:14,334 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:06:14,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14 WrapperNode [2025-02-06 13:06:14,335 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:06:14,336 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:06:14,336 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:06:14,337 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:06:14,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,348 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,363 INFO L138 Inliner]: procedures = 20, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 50 [2025-02-06 13:06:14,364 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:06:14,365 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:06:14,366 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:06:14,366 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:06:14,373 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,375 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,389 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]. [2025-02-06 13:06:14,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,393 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,394 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,395 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:06:14,398 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:06:14,398 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:06:14,398 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:06:14,399 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (1/1) ... [2025-02-06 13:06:14,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:06:14,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:14,426 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) [2025-02-06 13:06:14,427 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 [2025-02-06 13:06:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:06:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:06:14,448 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:06:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:06:14,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:06:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:06:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:06:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:06:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:06:14,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:06:14,450 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:06:14,528 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:06:14,529 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:06:14,695 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:06:14,695 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:06:14,829 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:06:14,829 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:06:14,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:06:14 BoogieIcfgContainer [2025-02-06 13:06:14,830 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:06:14,832 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:06:14,832 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:06:14,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:06:14,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:06:14" (1/3) ... [2025-02-06 13:06:14,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131d9a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:06:14, skipping insertion in model container [2025-02-06 13:06:14,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:14" (2/3) ... [2025-02-06 13:06:14,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131d9a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:06:14, skipping insertion in model container [2025-02-06 13:06:14,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:06:14" (3/3) ... [2025-02-06 13:06:14,840 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2025-02-06 13:06:14,853 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:06:14,855 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-threaded-sum-2.wvr.c that has 3 procedures, 26 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-02-06 13:06:14,855 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:06:14,904 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:06:14,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 27 transitions, 68 flow [2025-02-06 13:06:14,971 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2025-02-06 13:06:14,973 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:06:14,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 2/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-02-06 13:06:14,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 27 transitions, 68 flow [2025-02-06 13:06:14,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 60 flow [2025-02-06 13:06:14,985 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:06:14,999 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;@2f882643, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:06:14,999 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-06 13:06:15,008 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:06:15,009 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2025-02-06 13:06:15,009 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:06:15,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:15,010 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:15,010 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)] === [2025-02-06 13:06:15,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:15,017 INFO L85 PathProgramCache]: Analyzing trace with hash 428630572, now seen corresponding path program 1 times [2025-02-06 13:06:15,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:15,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017941126] [2025-02-06 13:06:15,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:15,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:15,089 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:06:15,133 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:06:15,134 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:15,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:15,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:15,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017941126] [2025-02-06 13:06:15,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017941126] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:15,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:15,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:15,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72226352] [2025-02-06 13:06:15,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:15,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:15,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:15,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:15,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2025-02-06 13:06:15,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2025-02-06 13:06:15,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:15,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2025-02-06 13:06:15,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:15,758 INFO L124 PetriNetUnfolderBase]: 120/234 cut-off events. [2025-02-06 13:06:15,758 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-02-06 13:06:15,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 234 events. 120/234 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 867 event pairs, 9 based on Foata normal form. 17/249 useless extension candidates. Maximal degree in co-relation 425. Up to 134 conditions per place. [2025-02-06 13:06:15,764 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 35 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2025-02-06 13:06:15,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 195 flow [2025-02-06 13:06:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2025-02-06 13:06:15,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2025-02-06 13:06:15,780 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 5 states and 84 transitions. [2025-02-06 13:06:15,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 195 flow [2025-02-06 13:06:15,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 46 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:15,790 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2025-02-06 13:06:15,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2025-02-06 13:06:15,799 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2025-02-06 13:06:15,799 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2025-02-06 13:06:15,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2025-02-06 13:06:15,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:15,800 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:15,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:06:15,801 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)] === [2025-02-06 13:06:15,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1733383060, now seen corresponding path program 1 times [2025-02-06 13:06:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:15,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638748323] [2025-02-06 13:06:15,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:15,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:15,816 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:06:15,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:06:15,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:15,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:16,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:16,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638748323] [2025-02-06 13:06:16,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638748323] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:16,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:16,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:16,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694746843] [2025-02-06 13:06:16,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:16,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:16,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:16,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:16,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:16,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2025-02-06 13:06:16,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2025-02-06 13:06:16,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:16,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2025-02-06 13:06:16,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:16,219 INFO L124 PetriNetUnfolderBase]: 146/290 cut-off events. [2025-02-06 13:06:16,219 INFO L125 PetriNetUnfolderBase]: For 194/194 co-relation queries the response was YES. [2025-02-06 13:06:16,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 290 events. 146/290 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1176 event pairs, 15 based on Foata normal form. 13/299 useless extension candidates. Maximal degree in co-relation 251. Up to 144 conditions per place. [2025-02-06 13:06:16,225 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 36 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2025-02-06 13:06:16,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 243 flow [2025-02-06 13:06:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2025-02-06 13:06:16,229 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2025-02-06 13:06:16,229 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 4 states and 64 transitions. [2025-02-06 13:06:16,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 243 flow [2025-02-06 13:06:16,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:16,232 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 104 flow [2025-02-06 13:06:16,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2025-02-06 13:06:16,233 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2025-02-06 13:06:16,233 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 104 flow [2025-02-06 13:06:16,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2025-02-06 13:06:16,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:16,233 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:16,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:06:16,233 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)] === [2025-02-06 13:06:16,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:16,235 INFO L85 PathProgramCache]: Analyzing trace with hash 921824657, now seen corresponding path program 1 times [2025-02-06 13:06:16,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:16,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950888092] [2025-02-06 13:06:16,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:16,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:16,248 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:06:16,260 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:06:16,261 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:16,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:16,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:16,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950888092] [2025-02-06 13:06:16,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950888092] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:16,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:16,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:16,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776647786] [2025-02-06 13:06:16,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:16,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:16,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:16,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:16,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:16,456 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2025-02-06 13:06:16,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2025-02-06 13:06:16,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:16,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2025-02-06 13:06:16,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:16,582 INFO L124 PetriNetUnfolderBase]: 156/301 cut-off events. [2025-02-06 13:06:16,582 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2025-02-06 13:06:16,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 301 events. 156/301 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1198 event pairs, 23 based on Foata normal form. 16/315 useless extension candidates. Maximal degree in co-relation 364. Up to 109 conditions per place. [2025-02-06 13:06:16,586 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 34 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2025-02-06 13:06:16,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 253 flow [2025-02-06 13:06:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2025-02-06 13:06:16,587 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2025-02-06 13:06:16,587 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 104 flow. Second operand 5 states and 78 transitions. [2025-02-06 13:06:16,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 253 flow [2025-02-06 13:06:16,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:16,590 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 150 flow [2025-02-06 13:06:16,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2025-02-06 13:06:16,590 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2025-02-06 13:06:16,591 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 150 flow [2025-02-06 13:06:16,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2025-02-06 13:06:16,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:16,591 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:16,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:06:16,591 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)] === [2025-02-06 13:06:16,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2135320083, now seen corresponding path program 2 times [2025-02-06 13:06:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:16,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878221737] [2025-02-06 13:06:16,592 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:16,600 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:06:16,641 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:06:16,641 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:06:16,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:17,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:17,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878221737] [2025-02-06 13:06:17,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878221737] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:17,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:17,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:06:17,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676815165] [2025-02-06 13:06:17,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:17,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:06:17,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:17,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:06:17,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:06:17,269 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2025-02-06 13:06:17,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 150 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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) [2025-02-06 13:06:17,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:17,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2025-02-06 13:06:17,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:17,585 INFO L124 PetriNetUnfolderBase]: 241/457 cut-off events. [2025-02-06 13:06:17,586 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2025-02-06 13:06:17,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1390 conditions, 457 events. 241/457 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1922 event pairs, 14 based on Foata normal form. 1/456 useless extension candidates. Maximal degree in co-relation 557. Up to 262 conditions per place. [2025-02-06 13:06:17,590 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 41 selfloop transitions, 14 changer transitions 9/69 dead transitions. [2025-02-06 13:06:17,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 69 transitions, 420 flow [2025-02-06 13:06:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:06:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:06:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2025-02-06 13:06:17,592 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2025-02-06 13:06:17,592 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 150 flow. Second operand 10 states and 141 transitions. [2025-02-06 13:06:17,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 69 transitions, 420 flow [2025-02-06 13:06:17,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:17,600 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 241 flow [2025-02-06 13:06:17,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=241, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2025-02-06 13:06:17,601 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2025-02-06 13:06:17,602 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 241 flow [2025-02-06 13:06:17,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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) [2025-02-06 13:06:17,602 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:17,602 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:17,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:06:17,603 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)] === [2025-02-06 13:06:17,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash -430790379, now seen corresponding path program 1 times [2025-02-06 13:06:17,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:17,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830362381] [2025-02-06 13:06:17,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:17,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:17,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:06:17,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:17,627 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:17,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:17,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:17,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830362381] [2025-02-06 13:06:17,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830362381] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:17,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151364937] [2025-02-06 13:06:17,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:17,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:17,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:17,879 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) [2025-02-06 13:06:17,881 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 [2025-02-06 13:06:17,921 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:06:17,936 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:17,937 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:17,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:17,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:06:17,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:18,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:18,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151364937] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:18,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:18,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 12 [2025-02-06 13:06:18,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077955564] [2025-02-06 13:06:18,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:18,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:06:18,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:18,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:06:18,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:06:18,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2025-02-06 13:06:18,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 241 flow. Second operand has 12 states, 12 states have (on average 9.916666666666666) internal successors, (119), 12 states have internal predecessors, (119), 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) [2025-02-06 13:06:18,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:18,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2025-02-06 13:06:18,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:19,229 INFO L124 PetriNetUnfolderBase]: 1054/1780 cut-off events. [2025-02-06 13:06:19,230 INFO L125 PetriNetUnfolderBase]: For 3276/3276 co-relation queries the response was YES. [2025-02-06 13:06:19,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5813 conditions, 1780 events. 1054/1780 cut-off events. For 3276/3276 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8609 event pairs, 47 based on Foata normal form. 22/1801 useless extension candidates. Maximal degree in co-relation 5786. Up to 380 conditions per place. [2025-02-06 13:06:19,249 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 149 selfloop transitions, 89 changer transitions 0/241 dead transitions. [2025-02-06 13:06:19,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 241 transitions, 1699 flow [2025-02-06 13:06:19,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-06 13:06:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-02-06 13:06:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 380 transitions. [2025-02-06 13:06:19,253 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2025-02-06 13:06:19,253 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 241 flow. Second operand 30 states and 380 transitions. [2025-02-06 13:06:19,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 241 transitions, 1699 flow [2025-02-06 13:06:19,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 241 transitions, 1643 flow, removed 21 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:19,266 INFO L231 Difference]: Finished difference. Result has 93 places, 126 transitions, 1088 flow [2025-02-06 13:06:19,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1088, PETRI_PLACES=93, PETRI_TRANSITIONS=126} [2025-02-06 13:06:19,267 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2025-02-06 13:06:19,267 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 126 transitions, 1088 flow [2025-02-06 13:06:19,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.916666666666666) internal successors, (119), 12 states have internal predecessors, (119), 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) [2025-02-06 13:06:19,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:19,267 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:19,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:06:19,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:19,472 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)] === [2025-02-06 13:06:19,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:19,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1790389053, now seen corresponding path program 2 times [2025-02-06 13:06:19,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:19,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838890689] [2025-02-06 13:06:19,474 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:19,481 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:19,525 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:19,527 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:19,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:20,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:20,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838890689] [2025-02-06 13:06:20,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838890689] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:20,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909538035] [2025-02-06 13:06:20,342 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:20,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:20,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:20,344 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) [2025-02-06 13:06:20,347 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 [2025-02-06 13:06:20,380 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:20,421 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:20,421 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:20,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:20,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 13:06:20,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:21,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:22,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909538035] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:22,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:22,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2025-02-06 13:06:22,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121463183] [2025-02-06 13:06:22,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:22,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 13:06:22,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:22,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 13:06:22,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2025-02-06 13:06:22,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2025-02-06 13:06:22,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 126 transitions, 1088 flow. Second operand has 22 states, 22 states have (on average 9.454545454545455) internal successors, (208), 22 states have internal predecessors, (208), 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) [2025-02-06 13:06:22,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:22,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2025-02-06 13:06:22,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:26,182 INFO L124 PetriNetUnfolderBase]: 1926/3543 cut-off events. [2025-02-06 13:06:26,183 INFO L125 PetriNetUnfolderBase]: For 25298/25298 co-relation queries the response was YES. [2025-02-06 13:06:26,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17527 conditions, 3543 events. 1926/3543 cut-off events. For 25298/25298 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22317 event pairs, 21 based on Foata normal form. 15/3556 useless extension candidates. Maximal degree in co-relation 13395. Up to 923 conditions per place. [2025-02-06 13:06:26,271 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 271 selfloop transitions, 178 changer transitions 103/556 dead transitions. [2025-02-06 13:06:26,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 556 transitions, 5737 flow [2025-02-06 13:06:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-02-06 13:06:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-02-06 13:06:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 619 transitions. [2025-02-06 13:06:26,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49838969404186795 [2025-02-06 13:06:26,277 INFO L175 Difference]: Start difference. First operand has 93 places, 126 transitions, 1088 flow. Second operand 46 states and 619 transitions. [2025-02-06 13:06:26,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 556 transitions, 5737 flow [2025-02-06 13:06:26,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 556 transitions, 5071 flow, removed 325 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:26,354 INFO L231 Difference]: Finished difference. Result has 157 places, 273 transitions, 2737 flow [2025-02-06 13:06:26,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2737, PETRI_PLACES=157, PETRI_TRANSITIONS=273} [2025-02-06 13:06:26,357 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2025-02-06 13:06:26,357 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 273 transitions, 2737 flow [2025-02-06 13:06:26,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.454545454545455) internal successors, (208), 22 states have internal predecessors, (208), 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) [2025-02-06 13:06:26,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:26,358 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:26,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 13:06:26,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:26,562 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 13:06:26,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:26,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1216854636, now seen corresponding path program 3 times [2025-02-06 13:06:26,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:26,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350314425] [2025-02-06 13:06:26,563 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:26,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:26,569 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-02-06 13:06:26,578 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 19 of 23 statements. [2025-02-06 13:06:26,578 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 13:06:26,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:26,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:26,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350314425] [2025-02-06 13:06:26,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350314425] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:26,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:26,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:06:26,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670016616] [2025-02-06 13:06:26,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:26,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:26,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:26,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:26,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:26,788 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2025-02-06 13:06:26,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 273 transitions, 2737 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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) [2025-02-06 13:06:26,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:26,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2025-02-06 13:06:26,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:27,503 INFO L124 PetriNetUnfolderBase]: 1991/3798 cut-off events. [2025-02-06 13:06:27,503 INFO L125 PetriNetUnfolderBase]: For 29514/29697 co-relation queries the response was YES. [2025-02-06 13:06:27,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19526 conditions, 3798 events. 1991/3798 cut-off events. For 29514/29697 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 25814 event pairs, 255 based on Foata normal form. 58/3785 useless extension candidates. Maximal degree in co-relation 19275. Up to 1051 conditions per place. [2025-02-06 13:06:27,548 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 284 selfloop transitions, 175 changer transitions 0/484 dead transitions. [2025-02-06 13:06:27,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 484 transitions, 5777 flow [2025-02-06 13:06:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:06:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:06:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2025-02-06 13:06:27,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2025-02-06 13:06:27,551 INFO L175 Difference]: Start difference. First operand has 157 places, 273 transitions, 2737 flow. Second operand 7 states and 114 transitions. [2025-02-06 13:06:27,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 484 transitions, 5777 flow [2025-02-06 13:06:27,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 484 transitions, 5331 flow, removed 199 selfloop flow, removed 19 redundant places. [2025-02-06 13:06:27,666 INFO L231 Difference]: Finished difference. Result has 134 places, 378 transitions, 4229 flow [2025-02-06 13:06:27,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4229, PETRI_PLACES=134, PETRI_TRANSITIONS=378} [2025-02-06 13:06:27,669 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 105 predicate places. [2025-02-06 13:06:27,671 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 378 transitions, 4229 flow [2025-02-06 13:06:27,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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) [2025-02-06 13:06:27,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:27,671 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:27,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:06:27,671 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 13:06:27,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash 965931024, now seen corresponding path program 4 times [2025-02-06 13:06:27,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:27,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084024500] [2025-02-06 13:06:27,672 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:27,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:27,678 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-02-06 13:06:27,692 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:06:27,695 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:27,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:27,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084024500] [2025-02-06 13:06:27,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084024500] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:27,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:27,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:06:27,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415943752] [2025-02-06 13:06:27,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:27,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:27,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:27,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:27,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:27,860 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2025-02-06 13:06:27,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 378 transitions, 4229 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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) [2025-02-06 13:06:27,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:27,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2025-02-06 13:06:27,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:28,729 INFO L124 PetriNetUnfolderBase]: 3008/5316 cut-off events. [2025-02-06 13:06:28,729 INFO L125 PetriNetUnfolderBase]: For 46548/46808 co-relation queries the response was YES. [2025-02-06 13:06:28,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28920 conditions, 5316 events. 3008/5316 cut-off events. For 46548/46808 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 34344 event pairs, 54 based on Foata normal form. 148/5433 useless extension candidates. Maximal degree in co-relation 26418. Up to 1377 conditions per place. [2025-02-06 13:06:28,789 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 473 selfloop transitions, 232 changer transitions 0/729 dead transitions. [2025-02-06 13:06:28,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 729 transitions, 9407 flow [2025-02-06 13:06:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:06:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:06:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2025-02-06 13:06:28,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2025-02-06 13:06:28,793 INFO L175 Difference]: Start difference. First operand has 134 places, 378 transitions, 4229 flow. Second operand 9 states and 120 transitions. [2025-02-06 13:06:28,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 729 transitions, 9407 flow [2025-02-06 13:06:28,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 729 transitions, 9323 flow, removed 42 selfloop flow, removed 0 redundant places. [2025-02-06 13:06:28,956 INFO L231 Difference]: Finished difference. Result has 145 places, 504 transitions, 6897 flow [2025-02-06 13:06:28,956 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6897, PETRI_PLACES=145, PETRI_TRANSITIONS=504} [2025-02-06 13:06:28,957 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 116 predicate places. [2025-02-06 13:06:28,957 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 504 transitions, 6897 flow [2025-02-06 13:06:28,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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) [2025-02-06 13:06:28,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:28,957 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:28,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:06:28,958 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 13:06:28,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:28,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1911763935, now seen corresponding path program 3 times [2025-02-06 13:06:28,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:28,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050576505] [2025-02-06 13:06:28,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:28,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:28,963 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-02-06 13:06:28,991 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:06:28,991 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:28,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:29,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:29,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050576505] [2025-02-06 13:06:29,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050576505] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270878035] [2025-02-06 13:06:29,623 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:29,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:29,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:29,625 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) [2025-02-06 13:06:29,628 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 [2025-02-06 13:06:29,654 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-02-06 13:06:29,682 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:06:29,682 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:29,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:29,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:06:29,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:30,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:31,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270878035] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:31,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:31,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2025-02-06 13:06:31,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115974940] [2025-02-06 13:06:31,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:31,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 13:06:31,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:31,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 13:06:31,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-02-06 13:06:31,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2025-02-06 13:06:31,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 504 transitions, 6897 flow. Second operand has 25 states, 25 states have (on average 8.64) internal successors, (216), 25 states have internal predecessors, (216), 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) [2025-02-06 13:06:31,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:31,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2025-02-06 13:06:31,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:39,490 INFO L124 PetriNetUnfolderBase]: 6052/10317 cut-off events. [2025-02-06 13:06:39,490 INFO L125 PetriNetUnfolderBase]: For 114572/114572 co-relation queries the response was YES. [2025-02-06 13:06:39,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63776 conditions, 10317 events. 6052/10317 cut-off events. For 114572/114572 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 70188 event pairs, 131 based on Foata normal form. 14/10330 useless extension candidates. Maximal degree in co-relation 56831. Up to 3562 conditions per place. [2025-02-06 13:06:39,598 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 782 selfloop transitions, 530 changer transitions 81/1396 dead transitions. [2025-02-06 13:06:39,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 1396 transitions, 19912 flow [2025-02-06 13:06:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2025-02-06 13:06:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2025-02-06 13:06:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 745 transitions. [2025-02-06 13:06:39,604 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44504181600955794 [2025-02-06 13:06:39,605 INFO L175 Difference]: Start difference. First operand has 145 places, 504 transitions, 6897 flow. Second operand 62 states and 745 transitions. [2025-02-06 13:06:39,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 1396 transitions, 19912 flow [2025-02-06 13:06:40,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 1396 transitions, 19832 flow, removed 37 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:40,212 INFO L231 Difference]: Finished difference. Result has 246 places, 927 transitions, 14206 flow [2025-02-06 13:06:40,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6879, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=14206, PETRI_PLACES=246, PETRI_TRANSITIONS=927} [2025-02-06 13:06:40,213 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 217 predicate places. [2025-02-06 13:06:40,213 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 927 transitions, 14206 flow [2025-02-06 13:06:40,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.64) internal successors, (216), 25 states have internal predecessors, (216), 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) [2025-02-06 13:06:40,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:40,214 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:40,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 13:06:40,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:40,414 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 13:06:40,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash 385040969, now seen corresponding path program 4 times [2025-02-06 13:06:40,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:40,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983810575] [2025-02-06 13:06:40,415 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:40,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:40,419 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-06 13:06:40,443 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:06:40,443 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:40,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:41,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:41,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983810575] [2025-02-06 13:06:41,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983810575] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:41,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916638584] [2025-02-06 13:06:41,452 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:41,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:41,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:41,454 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) [2025-02-06 13:06:41,455 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 [2025-02-06 13:06:41,485 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-06 13:06:41,578 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:06:41,578 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:41,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:41,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:06:41,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:42,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:51,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916638584] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:51,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:51,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2025-02-06 13:06:51,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673104766] [2025-02-06 13:06:51,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:51,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:06:51,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:51,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:06:51,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=434, Unknown=1, NotChecked=0, Total=552 [2025-02-06 13:06:51,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2025-02-06 13:06:51,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 927 transitions, 14206 flow. Second operand has 24 states, 24 states have (on average 9.458333333333334) internal successors, (227), 24 states have internal predecessors, (227), 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) [2025-02-06 13:06:51,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:51,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2025-02-06 13:06:51,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:57,289 WARN L286 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-06 13:07:02,753 INFO L124 PetriNetUnfolderBase]: 6240/11114 cut-off events. [2025-02-06 13:07:02,753 INFO L125 PetriNetUnfolderBase]: For 188615/188663 co-relation queries the response was YES. [2025-02-06 13:07:02,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81024 conditions, 11114 events. 6240/11114 cut-off events. For 188615/188663 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 81585 event pairs, 63 based on Foata normal form. 60/11172 useless extension candidates. Maximal degree in co-relation 80845. Up to 4838 conditions per place. [2025-02-06 13:07:02,885 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 947 selfloop transitions, 491 changer transitions 76/1520 dead transitions. [2025-02-06 13:07:02,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1520 transitions, 25510 flow [2025-02-06 13:07:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-02-06 13:07:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-02-06 13:07:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 531 transitions. [2025-02-06 13:07:02,888 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2025-02-06 13:07:02,888 INFO L175 Difference]: Start difference. First operand has 246 places, 927 transitions, 14206 flow. Second operand 42 states and 531 transitions. [2025-02-06 13:07:02,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1520 transitions, 25510 flow [2025-02-06 13:07:04,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1520 transitions, 24926 flow, removed 275 selfloop flow, removed 10 redundant places. [2025-02-06 13:07:04,208 INFO L231 Difference]: Finished difference. Result has 287 places, 1143 transitions, 18839 flow [2025-02-06 13:07:04,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13755, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=18839, PETRI_PLACES=287, PETRI_TRANSITIONS=1143} [2025-02-06 13:07:04,210 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 258 predicate places. [2025-02-06 13:07:04,211 INFO L471 AbstractCegarLoop]: Abstraction has has 287 places, 1143 transitions, 18839 flow [2025-02-06 13:07:04,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.458333333333334) internal successors, (227), 24 states have internal predecessors, (227), 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) [2025-02-06 13:07:04,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:04,212 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:04,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 13:07:04,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 13:07:04,412 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 13:07:04,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:04,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2075229111, now seen corresponding path program 5 times [2025-02-06 13:07:04,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:04,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473250238] [2025-02-06 13:07:04,413 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:07:04,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:04,417 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 4 equivalence classes. [2025-02-06 13:07:04,429 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:07:04,429 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:07:04,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:07:05,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:05,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473250238] [2025-02-06 13:07:05,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473250238] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:05,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302607976] [2025-02-06 13:07:05,357 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:07:05,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:05,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:05,359 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) [2025-02-06 13:07:05,362 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 [2025-02-06 13:07:05,394 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 4 equivalence classes. [2025-02-06 13:07:05,419 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:07:05,420 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:07:05,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:05,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-06 13:07:05,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:07:05,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:07:06,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302607976] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:06,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:06,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2025-02-06 13:07:06,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513413139] [2025-02-06 13:07:06,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:06,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-06 13:07:06,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:06,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-06 13:07:06,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2025-02-06 13:07:06,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2025-02-06 13:07:06,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1143 transitions, 18839 flow. Second operand has 36 states, 36 states have (on average 8.0) internal successors, (288), 36 states have internal predecessors, (288), 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) [2025-02-06 13:07:06,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:06,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2025-02-06 13:07:06,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:20,404 INFO L124 PetriNetUnfolderBase]: 11101/18791 cut-off events. [2025-02-06 13:07:20,405 INFO L125 PetriNetUnfolderBase]: For 360964/360964 co-relation queries the response was YES. [2025-02-06 13:07:20,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144230 conditions, 18791 events. 11101/18791 cut-off events. For 360964/360964 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 137163 event pairs, 156 based on Foata normal form. 27/18817 useless extension candidates. Maximal degree in co-relation 144012. Up to 3986 conditions per place. [2025-02-06 13:07:20,622 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 920 selfloop transitions, 1586 changer transitions 109/2618 dead transitions. [2025-02-06 13:07:20,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 2618 transitions, 47753 flow [2025-02-06 13:07:20,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2025-02-06 13:07:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2025-02-06 13:07:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 1159 transitions. [2025-02-06 13:07:20,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4011768778123918 [2025-02-06 13:07:20,626 INFO L175 Difference]: Start difference. First operand has 287 places, 1143 transitions, 18839 flow. Second operand 107 states and 1159 transitions. [2025-02-06 13:07:20,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 2618 transitions, 47753 flow [2025-02-06 13:07:23,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 2618 transitions, 46906 flow, removed 365 selfloop flow, removed 17 redundant places. [2025-02-06 13:07:23,793 INFO L231 Difference]: Finished difference. Result has 438 places, 2023 transitions, 39399 flow [2025-02-06 13:07:23,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18483, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=798, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=39399, PETRI_PLACES=438, PETRI_TRANSITIONS=2023} [2025-02-06 13:07:23,794 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 409 predicate places. [2025-02-06 13:07:23,794 INFO L471 AbstractCegarLoop]: Abstraction has has 438 places, 2023 transitions, 39399 flow [2025-02-06 13:07:23,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.0) internal successors, (288), 36 states have internal predecessors, (288), 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) [2025-02-06 13:07:23,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:23,795 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:23,802 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 [2025-02-06 13:07:23,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-06 13:07:23,999 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 13:07:23,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:23,999 INFO L85 PathProgramCache]: Analyzing trace with hash -286042525, now seen corresponding path program 5 times [2025-02-06 13:07:23,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:23,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106260177] [2025-02-06 13:07:24,000 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:07:24,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:24,003 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-06 13:07:24,024 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:24,025 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:07:24,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:07:24,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:24,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106260177] [2025-02-06 13:07:24,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106260177] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:24,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632479988] [2025-02-06 13:07:24,760 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:07:24,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:24,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:24,762 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) [2025-02-06 13:07:24,764 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 [2025-02-06 13:07:24,798 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-06 13:07:24,829 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:24,829 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:07:24,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:24,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:07:24,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:07:41,691 INFO L312 TraceCheckSpWp]: Computing backward predicates...