./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-symm.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/chl-name-comparator-symm.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 e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:02:05,957 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:02:06,013 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:02:06,021 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:02:06,021 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:02:06,036 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:02:06,037 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:02:06,037 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:02:06,037 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:02:06,037 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:02:06,037 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:02:06,037 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:02:06,037 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:02:06,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:02:06,037 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:02:06,037 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:02:06,038 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:02:06,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:06,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:02:06,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:02:06,039 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:02:06,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:02:06,039 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:02:06,039 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:02:06,039 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:02:06,039 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:02:06,039 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 -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2025-02-06 13:02:06,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:02:06,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:02:06,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:02:06,285 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:02:06,285 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:02:06,286 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2025-02-06 13:02:07,443 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/836384bb2/baf9f069f3fd4f1b9f0c51bf0260d63b/FLAG77d9dfe66 [2025-02-06 13:02:07,743 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:02:07,744 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2025-02-06 13:02:07,752 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/836384bb2/baf9f069f3fd4f1b9f0c51bf0260d63b/FLAG77d9dfe66 [2025-02-06 13:02:08,040 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/836384bb2/baf9f069f3fd4f1b9f0c51bf0260d63b [2025-02-06 13:02:08,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:02:08,043 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:02:08,044 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:08,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:02:08,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:02:08,048 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffbba88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08, skipping insertion in model container [2025-02-06 13:02:08,049 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,067 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:02:08,211 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:02:08,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:08,223 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:02:08,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:08,269 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:02:08,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08 WrapperNode [2025-02-06 13:02:08,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:08,270 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:08,270 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:02:08,270 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:02:08,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,279 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,293 INFO L138 Inliner]: procedures = 24, calls = 25, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 216 [2025-02-06 13:02:08,294 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:08,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:02:08,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:02:08,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:02:08,300 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,302 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,313 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 13:02:08,313 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,314 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,318 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,319 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,320 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,321 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:02:08,323 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:02:08,323 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:02:08,323 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:02:08,324 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (1/1) ... [2025-02-06 13:02:08,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:08,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:08,346 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 13:02:08,348 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 13:02:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:02:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:02:08,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:02:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:02:08,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:02:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:02:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:02:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:02:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:02:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:02:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:02:08,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:02:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:02:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:02:08,365 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 13:02:08,446 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:02:08,447 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:02:08,789 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:02:08,790 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:02:09,044 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:02:09,045 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:02:09,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:09 BoogieIcfgContainer [2025-02-06 13:02:09,046 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:02:09,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:02:09,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:02:09,052 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:02:09,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:02:08" (1/3) ... [2025-02-06 13:02:09,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a85a276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:09, skipping insertion in model container [2025-02-06 13:02:09,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:08" (2/3) ... [2025-02-06 13:02:09,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a85a276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:09, skipping insertion in model container [2025-02-06 13:02:09,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:09" (3/3) ... [2025-02-06 13:02:09,056 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2025-02-06 13:02:09,090 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:02:09,091 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-symm.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-02-06 13:02:09,091 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:02:09,144 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:02:09,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 88 flow [2025-02-06 13:02:09,199 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2025-02-06 13:02:09,201 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:02:09,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 5/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 52 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2025-02-06 13:02:09,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 88 flow [2025-02-06 13:02:09,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 34 transitions, 80 flow [2025-02-06 13:02:09,214 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:02:09,224 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;@4dc10afa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:02:09,225 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-02-06 13:02:09,229 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:02:09,229 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2025-02-06 13:02:09,229 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:02:09,229 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:09,230 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:09,230 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:09,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash 591908, now seen corresponding path program 1 times [2025-02-06 13:02:09,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:09,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087079189] [2025-02-06 13:02:09,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:09,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:09,314 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:09,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:09,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:09,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:09,458 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 13:02:09,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:09,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087079189] [2025-02-06 13:02:09,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087079189] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:09,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:09,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:02:09,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667929854] [2025-02-06 13:02:09,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:09,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:09,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:09,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:09,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:09,506 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-02-06 13:02:09,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 13:02:09,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:09,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-02-06 13:02:09,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:09,644 INFO L124 PetriNetUnfolderBase]: 128/261 cut-off events. [2025-02-06 13:02:09,644 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-06 13:02:09,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 261 events. 128/261 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 988 event pairs, 100 based on Foata normal form. 1/216 useless extension candidates. Maximal degree in co-relation 456. Up to 221 conditions per place. [2025-02-06 13:02:09,648 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2025-02-06 13:02:09,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 116 flow [2025-02-06 13:02:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:09,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2025-02-06 13:02:09,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2025-02-06 13:02:09,662 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 80 flow. Second operand 3 states and 54 transitions. [2025-02-06 13:02:09,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 116 flow [2025-02-06 13:02:09,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:09,667 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2025-02-06 13:02:09,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2025-02-06 13:02:09,672 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-02-06 13:02:09,672 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2025-02-06 13:02:09,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 13:02:09,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:09,672 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:09,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:02:09,672 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:09,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:09,673 INFO L85 PathProgramCache]: Analyzing trace with hash 591909, now seen corresponding path program 1 times [2025-02-06 13:02:09,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:09,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279126956] [2025-02-06 13:02:09,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:09,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:09,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:09,706 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:09,706 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:09,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:09,915 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 13:02:09,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:09,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279126956] [2025-02-06 13:02:09,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279126956] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:09,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:09,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:02:09,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231805810] [2025-02-06 13:02:09,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:09,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:09,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:09,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:09,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:09,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-02-06 13:02:09,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 13:02:09,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:09,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-02-06 13:02:09,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:10,069 INFO L124 PetriNetUnfolderBase]: 129/264 cut-off events. [2025-02-06 13:02:10,070 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:02:10,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 264 events. 129/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1000 event pairs, 100 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 482. Up to 226 conditions per place. [2025-02-06 13:02:10,072 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2025-02-06 13:02:10,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 128 flow [2025-02-06 13:02:10,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2025-02-06 13:02:10,074 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2025-02-06 13:02:10,074 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 3 states and 55 transitions. [2025-02-06 13:02:10,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 128 flow [2025-02-06 13:02:10,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:10,076 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 81 flow [2025-02-06 13:02:10,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2025-02-06 13:02:10,077 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2025-02-06 13:02:10,077 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 81 flow [2025-02-06 13:02:10,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 13:02:10,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:10,077 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:02:10,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:02:10,078 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:10,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:10,078 INFO L85 PathProgramCache]: Analyzing trace with hash 568843702, now seen corresponding path program 1 times [2025-02-06 13:02:10,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:10,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674501047] [2025-02-06 13:02:10,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:10,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:10,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:10,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:10,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:10,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:10,309 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 13:02:10,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:10,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674501047] [2025-02-06 13:02:10,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674501047] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:10,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906197195] [2025-02-06 13:02:10,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:10,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:10,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:10,316 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 13:02:10,328 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 13:02:10,377 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:10,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:10,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:10,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:10,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:02:10,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:10,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:02:10,522 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 13:02:10,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:10,595 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 13:02:10,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906197195] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:10,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:10,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-02-06 13:02:10,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326207923] [2025-02-06 13:02:10,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:10,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:02:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:10,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:02:10,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:02:10,641 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-02-06 13:02:10,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 81 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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 13:02:10,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:10,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-02-06 13:02:10,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:10,820 INFO L124 PetriNetUnfolderBase]: 131/270 cut-off events. [2025-02-06 13:02:10,820 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:02:10,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 270 events. 131/270 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1031 event pairs, 100 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 482. Up to 228 conditions per place. [2025-02-06 13:02:10,822 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 26 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2025-02-06 13:02:10,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 169 flow [2025-02-06 13:02:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2025-02-06 13:02:10,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2025-02-06 13:02:10,824 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 81 flow. Second operand 5 states and 80 transitions. [2025-02-06 13:02:10,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 169 flow [2025-02-06 13:02:10,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:10,825 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 122 flow [2025-02-06 13:02:10,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2025-02-06 13:02:10,826 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2025-02-06 13:02:10,826 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 122 flow [2025-02-06 13:02:10,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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 13:02:10,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:10,826 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:10,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:11,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:11,031 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:11,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:11,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1215010267, now seen corresponding path program 1 times [2025-02-06 13:02:11,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:11,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089065797] [2025-02-06 13:02:11,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:11,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:11,070 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:02:11,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:02:11,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:11,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:11,155 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 13:02:11,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:11,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089065797] [2025-02-06 13:02:11,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089065797] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:11,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:11,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:02:11,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127179866] [2025-02-06 13:02:11,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:11,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:11,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:11,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:11,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:11,178 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-02-06 13:02:11,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:11,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:11,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-02-06 13:02:11,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:11,254 INFO L124 PetriNetUnfolderBase]: 131/252 cut-off events. [2025-02-06 13:02:11,254 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-02-06 13:02:11,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 252 events. 131/252 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 850 event pairs, 100 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 485. Up to 223 conditions per place. [2025-02-06 13:02:11,257 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 24 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2025-02-06 13:02:11,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 33 transitions, 176 flow [2025-02-06 13:02:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2025-02-06 13:02:11,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3581081081081081 [2025-02-06 13:02:11,258 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 122 flow. Second operand 4 states and 53 transitions. [2025-02-06 13:02:11,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 33 transitions, 176 flow [2025-02-06 13:02:11,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 165 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:11,260 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 117 flow [2025-02-06 13:02:11,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2025-02-06 13:02:11,261 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2025-02-06 13:02:11,261 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 117 flow [2025-02-06 13:02:11,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:11,261 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:11,261 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:11,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:02:11,261 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:11,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1215010268, now seen corresponding path program 1 times [2025-02-06 13:02:11,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:11,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812116502] [2025-02-06 13:02:11,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:11,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:11,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:02:11,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:02:11,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:11,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:11,312 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 13:02:11,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:11,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812116502] [2025-02-06 13:02:11,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812116502] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:11,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:11,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:02:11,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600512976] [2025-02-06 13:02:11,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:11,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:11,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:11,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:11,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:11,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:11,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:11,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:11,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:11,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:11,390 INFO L124 PetriNetUnfolderBase]: 130/251 cut-off events. [2025-02-06 13:02:11,390 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-06 13:02:11,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518 conditions, 251 events. 130/251 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 834 event pairs, 100 based on Foata normal form. 1/225 useless extension candidates. Maximal degree in co-relation 488. Up to 230 conditions per place. [2025-02-06 13:02:11,392 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 27 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2025-02-06 13:02:11,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 170 flow [2025-02-06 13:02:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:11,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2025-02-06 13:02:11,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5045045045045045 [2025-02-06 13:02:11,394 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 117 flow. Second operand 3 states and 56 transitions. [2025-02-06 13:02:11,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 170 flow [2025-02-06 13:02:11,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 165 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:11,396 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 109 flow [2025-02-06 13:02:11,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2025-02-06 13:02:11,397 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2025-02-06 13:02:11,398 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 109 flow [2025-02-06 13:02:11,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:11,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:11,398 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2025-02-06 13:02:11,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:02:11,398 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:11,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash 198129688, now seen corresponding path program 2 times [2025-02-06 13:02:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:11,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093748936] [2025-02-06 13:02:11,399 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:11,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:11,405 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-02-06 13:02:11,417 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:11,417 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:11,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:11,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:11,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093748936] [2025-02-06 13:02:11,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093748936] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:11,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639440497] [2025-02-06 13:02:11,502 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:11,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:11,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:11,504 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 13:02:11,506 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 13:02:11,547 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-02-06 13:02:11,559 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:11,560 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:11,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:11,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:02:11,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:11,674 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:11,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639440497] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:11,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:11,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-06 13:02:11,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075713039] [2025-02-06 13:02:11,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:11,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:11,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:11,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:11,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:02:11,684 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:11,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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 13:02:11,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:11,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:11,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:11,805 INFO L124 PetriNetUnfolderBase]: 129/248 cut-off events. [2025-02-06 13:02:11,805 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-06 13:02:11,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 248 events. 129/248 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 816 event pairs, 100 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 491. Up to 223 conditions per place. [2025-02-06 13:02:11,808 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 7 changer transitions 0/32 dead transitions. [2025-02-06 13:02:11,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 157 flow [2025-02-06 13:02:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:02:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:02:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2025-02-06 13:02:11,811 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40540540540540543 [2025-02-06 13:02:11,811 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 109 flow. Second operand 6 states and 90 transitions. [2025-02-06 13:02:11,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 157 flow [2025-02-06 13:02:11,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 143 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:11,814 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 99 flow [2025-02-06 13:02:11,814 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=99, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2025-02-06 13:02:11,814 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2025-02-06 13:02:11,815 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 99 flow [2025-02-06 13:02:11,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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 13:02:11,815 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:11,815 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:11,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:12,020 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 13:02:12,020 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:12,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:12,020 INFO L85 PathProgramCache]: Analyzing trace with hash 215169773, now seen corresponding path program 1 times [2025-02-06 13:02:12,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:12,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436405277] [2025-02-06 13:02:12,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:12,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:12,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:02:12,034 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:12,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:12,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:12,082 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 13:02:12,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:12,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436405277] [2025-02-06 13:02:12,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436405277] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:12,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734868120] [2025-02-06 13:02:12,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:12,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:12,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:12,085 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 13:02:12,086 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 13:02:12,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:02:12,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:12,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:12,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:12,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 13:02:12,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:12,177 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 13:02:12,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:12,191 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 13:02:12,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734868120] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:12,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:12,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-02-06 13:02:12,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972615589] [2025-02-06 13:02:12,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:12,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:02:12,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:12,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:02:12,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:02:12,205 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:12,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 99 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 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 13:02:12,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:12,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:12,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:12,286 INFO L124 PetriNetUnfolderBase]: 127/246 cut-off events. [2025-02-06 13:02:12,286 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-06 13:02:12,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 246 events. 127/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 804 event pairs, 100 based on Foata normal form. 2/221 useless extension candidates. Maximal degree in co-relation 464. Up to 222 conditions per place. [2025-02-06 13:02:12,287 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 23 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2025-02-06 13:02:12,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 147 flow [2025-02-06 13:02:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2025-02-06 13:02:12,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42702702702702705 [2025-02-06 13:02:12,289 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 99 flow. Second operand 5 states and 79 transitions. [2025-02-06 13:02:12,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 147 flow [2025-02-06 13:02:12,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 135 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:12,290 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 81 flow [2025-02-06 13:02:12,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2025-02-06 13:02:12,291 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2025-02-06 13:02:12,291 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 81 flow [2025-02-06 13:02:12,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 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 13:02:12,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:12,291 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:12,301 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 13:02:12,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:12,492 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:12,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:12,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1528654769, now seen corresponding path program 2 times [2025-02-06 13:02:12,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:12,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723398295] [2025-02-06 13:02:12,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:12,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:12,499 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-06 13:02:12,503 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 13 statements. [2025-02-06 13:02:12,504 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:02:12,504 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:12,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:12,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723398295] [2025-02-06 13:02:12,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723398295] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:12,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:12,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:12,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060235808] [2025-02-06 13:02:12,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:12,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:12,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:12,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:12,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:12,646 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-02-06 13:02:12,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 13:02:12,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:12,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-02-06 13:02:12,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:12,814 INFO L124 PetriNetUnfolderBase]: 253/451 cut-off events. [2025-02-06 13:02:12,814 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:02:12,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 451 events. 253/451 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1700 event pairs, 118 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 897. Up to 254 conditions per place. [2025-02-06 13:02:12,817 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 39 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2025-02-06 13:02:12,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 204 flow [2025-02-06 13:02:12,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:12,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2025-02-06 13:02:12,818 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4702702702702703 [2025-02-06 13:02:12,818 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 81 flow. Second operand 5 states and 87 transitions. [2025-02-06 13:02:12,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 204 flow [2025-02-06 13:02:12,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 196 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:12,820 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 89 flow [2025-02-06 13:02:12,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=89, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2025-02-06 13:02:12,820 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2025-02-06 13:02:12,821 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 89 flow [2025-02-06 13:02:12,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 13:02:12,821 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:12,821 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:12,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:02:12,821 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:12,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:12,822 INFO L85 PathProgramCache]: Analyzing trace with hash -572013103, now seen corresponding path program 1 times [2025-02-06 13:02:12,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:12,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800465051] [2025-02-06 13:02:12,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:12,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:12,828 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:02:12,835 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:02:12,835 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:12,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:02:12,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:12,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800465051] [2025-02-06 13:02:12,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800465051] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:12,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810432543] [2025-02-06 13:02:12,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:12,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:12,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:12,998 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 13:02:13,000 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 13:02:13,040 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:02:13,060 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:02:13,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:13,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:13,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:02:13,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:13,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:13,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-06 13:02:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:13,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810432543] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:13,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:13,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2025-02-06 13:02:13,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464890510] [2025-02-06 13:02:13,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:13,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:02:13,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:13,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:02:13,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:02:13,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-02-06 13:02:13,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 89 flow. Second operand has 17 states, 17 states have (on average 11.470588235294118) internal successors, (195), 17 states have internal predecessors, (195), 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 13:02:13,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:13,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-02-06 13:02:13,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:13,848 INFO L124 PetriNetUnfolderBase]: 618/1080 cut-off events. [2025-02-06 13:02:13,848 INFO L125 PetriNetUnfolderBase]: For 196/224 co-relation queries the response was YES. [2025-02-06 13:02:13,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2326 conditions, 1080 events. 618/1080 cut-off events. For 196/224 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4675 event pairs, 228 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 2294. Up to 463 conditions per place. [2025-02-06 13:02:13,854 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 54 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2025-02-06 13:02:13,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 63 transitions, 303 flow [2025-02-06 13:02:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:02:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:02:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2025-02-06 13:02:13,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44594594594594594 [2025-02-06 13:02:13,856 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 89 flow. Second operand 8 states and 132 transitions. [2025-02-06 13:02:13,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 63 transitions, 303 flow [2025-02-06 13:02:13,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 63 transitions, 293 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:13,857 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 111 flow [2025-02-06 13:02:13,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=111, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2025-02-06 13:02:13,858 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2025-02-06 13:02:13,858 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 111 flow [2025-02-06 13:02:13,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.470588235294118) internal successors, (195), 17 states have internal predecessors, (195), 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 13:02:13,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:13,859 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:13,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:14,059 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,SelfDestructingSolverStorable8 [2025-02-06 13:02:14,060 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:14,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:14,060 INFO L85 PathProgramCache]: Analyzing trace with hash -615373990, now seen corresponding path program 1 times [2025-02-06 13:02:14,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:14,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197235469] [2025-02-06 13:02:14,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:14,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:14,070 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:02:14,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:14,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:14,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:14,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:14,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197235469] [2025-02-06 13:02:14,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197235469] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:14,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879516539] [2025-02-06 13:02:14,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:14,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:14,240 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 13:02:14,242 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 13:02:14,279 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:02:14,293 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:14,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:14,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:14,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 13:02:14,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:14,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:02:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:14,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:14,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879516539] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:14,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:14,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2025-02-06 13:02:14,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444366661] [2025-02-06 13:02:14,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:14,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 13:02:14,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:14,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 13:02:14,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2025-02-06 13:02:14,737 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-02-06 13:02:14,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 111 flow. Second operand has 21 states, 21 states have (on average 10.142857142857142) internal successors, (213), 21 states have internal predecessors, (213), 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 13:02:14,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:14,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-02-06 13:02:14,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:15,185 INFO L124 PetriNetUnfolderBase]: 1165/2025 cut-off events. [2025-02-06 13:02:15,185 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2025-02-06 13:02:15,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4577 conditions, 2025 events. 1165/2025 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9979 event pairs, 318 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 4541. Up to 628 conditions per place. [2025-02-06 13:02:15,193 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 79 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2025-02-06 13:02:15,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 89 transitions, 454 flow [2025-02-06 13:02:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2025-02-06 13:02:15,198 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2025-02-06 13:02:15,198 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 111 flow. Second operand 9 states and 153 transitions. [2025-02-06 13:02:15,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 89 transitions, 454 flow [2025-02-06 13:02:15,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 89 transitions, 447 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:15,200 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 138 flow [2025-02-06 13:02:15,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=138, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2025-02-06 13:02:15,200 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2025-02-06 13:02:15,200 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 138 flow [2025-02-06 13:02:15,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.142857142857142) internal successors, (213), 21 states have internal predecessors, (213), 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 13:02:15,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:15,201 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:15,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:02:15,401 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,SelfDestructingSolverStorable9 [2025-02-06 13:02:15,401 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:15,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash 988702673, now seen corresponding path program 1 times [2025-02-06 13:02:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:15,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996633495] [2025-02-06 13:02:15,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:15,407 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:02:15,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:02:15,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:15,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:15,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:15,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996633495] [2025-02-06 13:02:15,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996633495] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:15,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643087226] [2025-02-06 13:02:15,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:15,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:15,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:15,593 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 13:02:15,594 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 13:02:15,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:02:15,662 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:02:15,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:15,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:15,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:02:15,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:15,806 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:15,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-06 13:02:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:15,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643087226] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:15,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:15,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2025-02-06 13:02:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802026490] [2025-02-06 13:02:15,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:15,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:02:15,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:15,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:02:15,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:02:16,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-02-06 13:02:16,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 138 flow. Second operand has 24 states, 24 states have (on average 11.5) internal successors, (276), 24 states have internal predecessors, (276), 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 13:02:16,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:16,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-02-06 13:02:16,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:16,798 INFO L124 PetriNetUnfolderBase]: 1517/2633 cut-off events. [2025-02-06 13:02:16,798 INFO L125 PetriNetUnfolderBase]: For 1312/1348 co-relation queries the response was YES. [2025-02-06 13:02:16,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6273 conditions, 2633 events. 1517/2633 cut-off events. For 1312/1348 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13214 event pairs, 450 based on Foata normal form. 46/2311 useless extension candidates. Maximal degree in co-relation 6234. Up to 885 conditions per place. [2025-02-06 13:02:16,809 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 77 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2025-02-06 13:02:16,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 500 flow [2025-02-06 13:02:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2025-02-06 13:02:16,812 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46546546546546547 [2025-02-06 13:02:16,812 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 138 flow. Second operand 9 states and 155 transitions. [2025-02-06 13:02:16,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 500 flow [2025-02-06 13:02:16,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 87 transitions, 469 flow, removed 8 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:16,815 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 151 flow [2025-02-06 13:02:16,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2025-02-06 13:02:16,816 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2025-02-06 13:02:16,816 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 151 flow [2025-02-06 13:02:16,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.5) internal successors, (276), 24 states have internal predecessors, (276), 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 13:02:16,817 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:16,817 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2025-02-06 13:02:16,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 13:02:17,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-06 13:02:17,017 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:17,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash -474607814, now seen corresponding path program 2 times [2025-02-06 13:02:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:17,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691358272] [2025-02-06 13:02:17,018 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:17,023 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:02:17,035 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:02:17,035 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:17,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:17,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:17,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691358272] [2025-02-06 13:02:17,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691358272] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:17,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408375262] [2025-02-06 13:02:17,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:17,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:17,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:17,263 INFO L229 MonitoredProcess]: Starting monitored process 8 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 13:02:17,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:02:17,310 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:02:17,330 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:02:17,330 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:17,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:17,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 13:02:17,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:17,372 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:17,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408375262] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:17,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:17,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2025-02-06 13:02:17,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667910588] [2025-02-06 13:02:17,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:17,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:17,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:17,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:17,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:02:17,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:17,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 34 transitions, 151 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 13:02:17,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:17,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:17,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:17,777 INFO L124 PetriNetUnfolderBase]: 1341/2363 cut-off events. [2025-02-06 13:02:17,777 INFO L125 PetriNetUnfolderBase]: For 1339/1379 co-relation queries the response was YES. [2025-02-06 13:02:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 2363 events. 1341/2363 cut-off events. For 1339/1379 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 12102 event pairs, 20 based on Foata normal form. 0/2055 useless extension candidates. Maximal degree in co-relation 5599. Up to 595 conditions per place. [2025-02-06 13:02:17,786 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 94 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2025-02-06 13:02:17,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 100 transitions, 583 flow [2025-02-06 13:02:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:02:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:02:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2025-02-06 13:02:17,787 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2025-02-06 13:02:17,787 INFO L175 Difference]: Start difference. First operand has 53 places, 34 transitions, 151 flow. Second operand 6 states and 142 transitions. [2025-02-06 13:02:17,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 100 transitions, 583 flow [2025-02-06 13:02:17,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 100 transitions, 526 flow, removed 5 selfloop flow, removed 11 redundant places. [2025-02-06 13:02:17,792 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 123 flow [2025-02-06 13:02:17,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=123, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2025-02-06 13:02:17,794 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2025-02-06 13:02:17,794 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 123 flow [2025-02-06 13:02:17,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 13:02:17,794 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:17,794 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:17,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 13:02:17,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:17,995 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:17,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash 914719892, now seen corresponding path program 1 times [2025-02-06 13:02:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:17,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546673382] [2025-02-06 13:02:17,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:17,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:18,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:02:18,023 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:02:18,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:18,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:18,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:18,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546673382] [2025-02-06 13:02:18,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546673382] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:18,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:18,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:02:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553196533] [2025-02-06 13:02:18,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:18,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:18,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:18,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:18,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:02:18,220 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:18,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 13:02:18,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:18,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:18,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:18,513 INFO L124 PetriNetUnfolderBase]: 1343/2417 cut-off events. [2025-02-06 13:02:18,513 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2025-02-06 13:02:18,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5781 conditions, 2417 events. 1343/2417 cut-off events. For 1107/1107 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12580 event pairs, 987 based on Foata normal form. 3/2244 useless extension candidates. Maximal degree in co-relation 5747. Up to 1808 conditions per place. [2025-02-06 13:02:18,523 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 52 selfloop transitions, 3 changer transitions 7/64 dead transitions. [2025-02-06 13:02:18,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 350 flow [2025-02-06 13:02:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2025-02-06 13:02:18,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2025-02-06 13:02:18,524 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 123 flow. Second operand 5 states and 104 transitions. [2025-02-06 13:02:18,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 350 flow [2025-02-06 13:02:18,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 329 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:18,528 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 136 flow [2025-02-06 13:02:18,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2025-02-06 13:02:18,529 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2025-02-06 13:02:18,529 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 136 flow [2025-02-06 13:02:18,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 13:02:18,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:18,529 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:18,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-06 13:02:18,529 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:18,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2027284642, now seen corresponding path program 2 times [2025-02-06 13:02:18,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:18,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038497462] [2025-02-06 13:02:18,530 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:18,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:18,539 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:02:18,554 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 24 statements. [2025-02-06 13:02:18,554 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:02:18,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:18,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038497462] [2025-02-06 13:02:18,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038497462] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:18,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:18,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:02:18,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600979752] [2025-02-06 13:02:18,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:18,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:18,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:18,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:02:18,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:18,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 13:02:18,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:18,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:18,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:19,077 INFO L124 PetriNetUnfolderBase]: 1344/2410 cut-off events. [2025-02-06 13:02:19,077 INFO L125 PetriNetUnfolderBase]: For 1609/1618 co-relation queries the response was YES. [2025-02-06 13:02:19,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 2410 events. 1344/2410 cut-off events. For 1609/1618 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12874 event pairs, 966 based on Foata normal form. 1/2235 useless extension candidates. Maximal degree in co-relation 6125. Up to 1751 conditions per place. [2025-02-06 13:02:19,094 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 58 selfloop transitions, 3 changer transitions 9/72 dead transitions. [2025-02-06 13:02:19,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 430 flow [2025-02-06 13:02:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2025-02-06 13:02:19,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5783783783783784 [2025-02-06 13:02:19,096 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 136 flow. Second operand 5 states and 107 transitions. [2025-02-06 13:02:19,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 430 flow [2025-02-06 13:02:19,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 410 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:19,101 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 148 flow [2025-02-06 13:02:19,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2025-02-06 13:02:19,101 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2025-02-06 13:02:19,101 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 148 flow [2025-02-06 13:02:19,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 13:02:19,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:19,102 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:19,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:02:19,102 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:19,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:19,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1970936384, now seen corresponding path program 3 times [2025-02-06 13:02:19,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:19,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046847725] [2025-02-06 13:02:19,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:19,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:19,112 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 4 equivalence classes. [2025-02-06 13:02:19,120 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 18 of 24 statements. [2025-02-06 13:02:19,121 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 13:02:19,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:19,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:19,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046847725] [2025-02-06 13:02:19,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046847725] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:19,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:19,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:02:19,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018300990] [2025-02-06 13:02:19,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:19,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:19,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:19,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:19,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:02:19,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:19,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 34 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 13:02:19,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:19,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:19,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:19,734 INFO L124 PetriNetUnfolderBase]: 1441/2581 cut-off events. [2025-02-06 13:02:19,735 INFO L125 PetriNetUnfolderBase]: For 1858/1858 co-relation queries the response was YES. [2025-02-06 13:02:19,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7052 conditions, 2581 events. 1441/2581 cut-off events. For 1858/1858 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13572 event pairs, 993 based on Foata normal form. 3/2584 useless extension candidates. Maximal degree in co-relation 7013. Up to 1839 conditions per place. [2025-02-06 13:02:19,747 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 56 selfloop transitions, 10 changer transitions 5/73 dead transitions. [2025-02-06 13:02:19,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 445 flow [2025-02-06 13:02:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2025-02-06 13:02:19,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2025-02-06 13:02:19,749 INFO L175 Difference]: Start difference. First operand has 53 places, 34 transitions, 148 flow. Second operand 5 states and 110 transitions. [2025-02-06 13:02:19,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 445 flow [2025-02-06 13:02:19,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 421 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:19,753 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 235 flow [2025-02-06 13:02:19,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2025-02-06 13:02:19,754 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2025-02-06 13:02:19,754 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 235 flow [2025-02-06 13:02:19,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 13:02:19,755 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:19,755 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:19,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:02:19,755 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:19,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash -151228002, now seen corresponding path program 4 times [2025-02-06 13:02:19,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:19,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466583136] [2025-02-06 13:02:19,756 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:02:19,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:19,763 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:02:19,770 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:02:19,770 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:02:19,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:19,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:19,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466583136] [2025-02-06 13:02:19,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466583136] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:19,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:19,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:02:19,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205959970] [2025-02-06 13:02:19,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:19,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:19,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:19,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:19,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:02:19,935 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:19,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 13:02:19,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:19,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:19,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:20,236 INFO L124 PetriNetUnfolderBase]: 1455/2603 cut-off events. [2025-02-06 13:02:20,236 INFO L125 PetriNetUnfolderBase]: For 3222/3222 co-relation queries the response was YES. [2025-02-06 13:02:20,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7760 conditions, 2603 events. 1455/2603 cut-off events. For 3222/3222 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 13864 event pairs, 976 based on Foata normal form. 3/2606 useless extension candidates. Maximal degree in co-relation 7719. Up to 1835 conditions per place. [2025-02-06 13:02:20,254 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 62 selfloop transitions, 11 changer transitions 5/80 dead transitions. [2025-02-06 13:02:20,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 562 flow [2025-02-06 13:02:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2025-02-06 13:02:20,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-02-06 13:02:20,255 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 235 flow. Second operand 5 states and 111 transitions. [2025-02-06 13:02:20,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 562 flow [2025-02-06 13:02:20,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 556 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:20,261 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 332 flow [2025-02-06 13:02:20,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2025-02-06 13:02:20,262 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2025-02-06 13:02:20,262 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 332 flow [2025-02-06 13:02:20,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 13:02:20,262 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:20,262 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:20,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-06 13:02:20,262 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:20,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:20,262 INFO L85 PathProgramCache]: Analyzing trace with hash -443765887, now seen corresponding path program 2 times [2025-02-06 13:02:20,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:20,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509384048] [2025-02-06 13:02:20,262 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:20,269 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:02:20,279 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:02:20,280 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:20,280 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:20,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:20,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509384048] [2025-02-06 13:02:20,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509384048] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:20,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117491999] [2025-02-06 13:02:20,451 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:20,456 INFO L229 MonitoredProcess]: Starting monitored process 9 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 13:02:20,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 13:02:20,506 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:02:20,527 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:02:20,527 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:20,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:20,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 13:02:20,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:20,573 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:20,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117491999] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:20,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:20,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2025-02-06 13:02:20,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381191422] [2025-02-06 13:02:20,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:20,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:20,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:20,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:20,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:02:20,581 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:20,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 13:02:20,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:20,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:20,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:20,873 INFO L124 PetriNetUnfolderBase]: 1349/2410 cut-off events. [2025-02-06 13:02:20,873 INFO L125 PetriNetUnfolderBase]: For 4240/4240 co-relation queries the response was YES. [2025-02-06 13:02:20,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7494 conditions, 2410 events. 1349/2410 cut-off events. For 4240/4240 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 12279 event pairs, 107 based on Foata normal form. 44/2454 useless extension candidates. Maximal degree in co-relation 7450. Up to 696 conditions per place. [2025-02-06 13:02:20,885 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 96 selfloop transitions, 7 changer transitions 1/105 dead transitions. [2025-02-06 13:02:20,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 821 flow [2025-02-06 13:02:20,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:02:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:02:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2025-02-06 13:02:20,887 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2025-02-06 13:02:20,887 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 332 flow. Second operand 6 states and 135 transitions. [2025-02-06 13:02:20,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 821 flow [2025-02-06 13:02:20,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 105 transitions, 787 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:20,897 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 308 flow [2025-02-06 13:02:20,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2025-02-06 13:02:20,898 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2025-02-06 13:02:20,898 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 308 flow [2025-02-06 13:02:20,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 13:02:20,898 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:20,899 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:20,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:21,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-06 13:02:21,103 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:21,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash 292779309, now seen corresponding path program 1 times [2025-02-06 13:02:21,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:21,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553350057] [2025-02-06 13:02:21,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:21,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:21,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 13:02:21,119 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:02:21,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:21,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:21,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:21,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553350057] [2025-02-06 13:02:21,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553350057] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:21,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203877012] [2025-02-06 13:02:21,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:21,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:21,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:21,183 INFO L229 MonitoredProcess]: Starting monitored process 10 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 13:02:21,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 13:02:21,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 13:02:21,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:02:21,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:21,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:21,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:02:21,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:21,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:21,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203877012] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:21,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:02:21,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2025-02-06 13:02:21,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854192834] [2025-02-06 13:02:21,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:21,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:21,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:21,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:21,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:02:21,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:21,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:21,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:21,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:21,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:21,610 INFO L124 PetriNetUnfolderBase]: 1487/2647 cut-off events. [2025-02-06 13:02:21,610 INFO L125 PetriNetUnfolderBase]: For 3942/3942 co-relation queries the response was YES. [2025-02-06 13:02:21,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8179 conditions, 2647 events. 1487/2647 cut-off events. For 3942/3942 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 14176 event pairs, 91 based on Foata normal form. 33/2680 useless extension candidates. Maximal degree in co-relation 8138. Up to 1450 conditions per place. [2025-02-06 13:02:21,623 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 72 selfloop transitions, 25 changer transitions 4/102 dead transitions. [2025-02-06 13:02:21,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 102 transitions, 817 flow [2025-02-06 13:02:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:02:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:02:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2025-02-06 13:02:21,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.528957528957529 [2025-02-06 13:02:21,625 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 308 flow. Second operand 7 states and 137 transitions. [2025-02-06 13:02:21,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 102 transitions, 817 flow [2025-02-06 13:02:21,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 788 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:21,633 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 521 flow [2025-02-06 13:02:21,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=521, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2025-02-06 13:02:21,634 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2025-02-06 13:02:21,634 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 521 flow [2025-02-06 13:02:21,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:21,634 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:21,634 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:21,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:21,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 13:02:21,835 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:21,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1405582044, now seen corresponding path program 1 times [2025-02-06 13:02:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:21,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853141811] [2025-02-06 13:02:21,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:21,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:21,841 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 13:02:21,845 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:02:21,845 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:21,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:21,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:21,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853141811] [2025-02-06 13:02:21,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853141811] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:21,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034523201] [2025-02-06 13:02:21,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:21,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:21,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:21,926 INFO L229 MonitoredProcess]: Starting monitored process 11 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 13:02:21,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 13:02:21,975 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 13:02:21,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:02:21,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:21,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:21,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:02:21,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:22,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:22,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034523201] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:22,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:02:22,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2025-02-06 13:02:22,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643264053] [2025-02-06 13:02:22,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:22,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:22,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:22,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:02:22,072 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:22,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 521 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:22,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:22,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:22,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:22,361 INFO L124 PetriNetUnfolderBase]: 1616/2866 cut-off events. [2025-02-06 13:02:22,361 INFO L125 PetriNetUnfolderBase]: For 7472/7472 co-relation queries the response was YES. [2025-02-06 13:02:22,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9847 conditions, 2866 events. 1616/2866 cut-off events. For 7472/7472 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 15234 event pairs, 209 based on Foata normal form. 30/2896 useless extension candidates. Maximal degree in co-relation 9802. Up to 1481 conditions per place. [2025-02-06 13:02:22,372 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 78 selfloop transitions, 38 changer transitions 4/121 dead transitions. [2025-02-06 13:02:22,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 1151 flow [2025-02-06 13:02:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:02:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:02:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2025-02-06 13:02:22,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5173745173745173 [2025-02-06 13:02:22,373 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 521 flow. Second operand 7 states and 134 transitions. [2025-02-06 13:02:22,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 1151 flow [2025-02-06 13:02:22,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 121 transitions, 1119 flow, removed 16 selfloop flow, removed 0 redundant places. [2025-02-06 13:02:22,384 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 823 flow [2025-02-06 13:02:22,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=823, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2025-02-06 13:02:22,385 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2025-02-06 13:02:22,385 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 823 flow [2025-02-06 13:02:22,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:22,385 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:22,385 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:22,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:22,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:22,586 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:22,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:22,586 INFO L85 PathProgramCache]: Analyzing trace with hash 134405626, now seen corresponding path program 2 times [2025-02-06 13:02:22,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:22,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625769971] [2025-02-06 13:02:22,586 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:22,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:22,592 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 13:02:22,598 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:02:22,598 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:22,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:22,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:22,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625769971] [2025-02-06 13:02:22,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625769971] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:22,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:22,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:02:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941701867] [2025-02-06 13:02:22,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:22,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:22,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:22,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:22,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:22,681 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:22,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 823 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:22,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:22,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:22,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:23,009 INFO L124 PetriNetUnfolderBase]: 1618/2883 cut-off events. [2025-02-06 13:02:23,009 INFO L125 PetriNetUnfolderBase]: For 11744/11744 co-relation queries the response was YES. [2025-02-06 13:02:23,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10766 conditions, 2883 events. 1618/2883 cut-off events. For 11744/11744 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 15869 event pairs, 977 based on Foata normal form. 6/2889 useless extension candidates. Maximal degree in co-relation 10716. Up to 1951 conditions per place. [2025-02-06 13:02:23,022 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 96 selfloop transitions, 17 changer transitions 1/115 dead transitions. [2025-02-06 13:02:23,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 115 transitions, 1243 flow [2025-02-06 13:02:23,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2025-02-06 13:02:23,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2025-02-06 13:02:23,026 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 823 flow. Second operand 5 states and 110 transitions. [2025-02-06 13:02:23,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 115 transitions, 1243 flow [2025-02-06 13:02:23,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 1211 flow, removed 16 selfloop flow, removed 0 redundant places. [2025-02-06 13:02:23,043 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 865 flow [2025-02-06 13:02:23,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=865, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2025-02-06 13:02:23,044 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2025-02-06 13:02:23,044 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 865 flow [2025-02-06 13:02:23,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:23,044 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:23,044 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:23,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-06 13:02:23,044 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:23,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:23,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1315454920, now seen corresponding path program 3 times [2025-02-06 13:02:23,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:23,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975468440] [2025-02-06 13:02:23,045 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:23,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:23,051 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-02-06 13:02:23,058 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 27 statements. [2025-02-06 13:02:23,059 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:02:23,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:23,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:23,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975468440] [2025-02-06 13:02:23,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975468440] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:23,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563515533] [2025-02-06 13:02:23,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:23,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:23,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:23,119 INFO L229 MonitoredProcess]: Starting monitored process 12 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 13:02:23,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 13:02:23,175 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-02-06 13:02:23,198 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 27 statements. [2025-02-06 13:02:23,198 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:02:23,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:23,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:02:23,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:23,281 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:23,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563515533] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:23,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:02:23,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2025-02-06 13:02:23,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637646161] [2025-02-06 13:02:23,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:23,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:23,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:23,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:23,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:02:23,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:23,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 865 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:23,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:23,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:23,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:23,677 INFO L124 PetriNetUnfolderBase]: 1729/3060 cut-off events. [2025-02-06 13:02:23,677 INFO L125 PetriNetUnfolderBase]: For 12275/12275 co-relation queries the response was YES. [2025-02-06 13:02:23,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11423 conditions, 3060 events. 1729/3060 cut-off events. For 12275/12275 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 16905 event pairs, 917 based on Foata normal form. 30/3090 useless extension candidates. Maximal degree in co-relation 11370. Up to 1707 conditions per place. [2025-02-06 13:02:23,694 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 82 selfloop transitions, 32 changer transitions 7/122 dead transitions. [2025-02-06 13:02:23,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 122 transitions, 1314 flow [2025-02-06 13:02:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2025-02-06 13:02:23,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6108108108108108 [2025-02-06 13:02:23,696 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 865 flow. Second operand 5 states and 113 transitions. [2025-02-06 13:02:23,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 122 transitions, 1314 flow [2025-02-06 13:02:23,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 122 transitions, 1285 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:23,721 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 955 flow [2025-02-06 13:02:23,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=955, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2025-02-06 13:02:23,721 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 52 predicate places. [2025-02-06 13:02:23,722 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 955 flow [2025-02-06 13:02:23,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:23,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:23,722 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:23,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 13:02:23,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-02-06 13:02:23,923 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:23,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash 103833201, now seen corresponding path program 2 times [2025-02-06 13:02:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:23,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679697180] [2025-02-06 13:02:23,924 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:23,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:23,938 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-06 13:02:23,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 27 statements. [2025-02-06 13:02:23,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:02:23,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:24,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:24,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679697180] [2025-02-06 13:02:24,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679697180] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:24,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:24,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:02:24,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279616865] [2025-02-06 13:02:24,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:24,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:24,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:24,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:24,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:24,012 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:24,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 955 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:24,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:24,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:24,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:24,424 INFO L124 PetriNetUnfolderBase]: 1928/3399 cut-off events. [2025-02-06 13:02:24,424 INFO L125 PetriNetUnfolderBase]: For 17758/17758 co-relation queries the response was YES. [2025-02-06 13:02:24,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13390 conditions, 3399 events. 1928/3399 cut-off events. For 17758/17758 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 19171 event pairs, 1053 based on Foata normal form. 33/3432 useless extension candidates. Maximal degree in co-relation 13335. Up to 2003 conditions per place. [2025-02-06 13:02:24,444 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 97 selfloop transitions, 31 changer transitions 7/136 dead transitions. [2025-02-06 13:02:24,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 136 transitions, 1580 flow [2025-02-06 13:02:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:02:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:02:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2025-02-06 13:02:24,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2025-02-06 13:02:24,448 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 955 flow. Second operand 7 states and 147 transitions. [2025-02-06 13:02:24,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 136 transitions, 1580 flow [2025-02-06 13:02:24,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 136 transitions, 1484 flow, removed 13 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:24,506 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 1151 flow [2025-02-06 13:02:24,506 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1151, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2025-02-06 13:02:24,507 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 55 predicate places. [2025-02-06 13:02:24,507 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 1151 flow [2025-02-06 13:02:24,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:24,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:24,507 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:24,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-06 13:02:24,507 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:24,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:24,507 INFO L85 PathProgramCache]: Analyzing trace with hash 994925326, now seen corresponding path program 4 times [2025-02-06 13:02:24,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:24,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171546118] [2025-02-06 13:02:24,508 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:02:24,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:24,513 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-06 13:02:24,521 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:02:24,523 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:02:24,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:24,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:24,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171546118] [2025-02-06 13:02:24,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171546118] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:24,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:24,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:02:24,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691099199] [2025-02-06 13:02:24,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:24,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:24,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:24,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:24,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:24,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:24,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 1151 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:24,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:24,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:24,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:25,137 INFO L124 PetriNetUnfolderBase]: 1923/3403 cut-off events. [2025-02-06 13:02:25,137 INFO L125 PetriNetUnfolderBase]: For 17280/17280 co-relation queries the response was YES. [2025-02-06 13:02:25,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13392 conditions, 3403 events. 1923/3403 cut-off events. For 17280/17280 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 18910 event pairs, 1104 based on Foata normal form. 6/3409 useless extension candidates. Maximal degree in co-relation 13336. Up to 2170 conditions per place. [2025-02-06 13:02:25,163 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 104 selfloop transitions, 22 changer transitions 1/128 dead transitions. [2025-02-06 13:02:25,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 128 transitions, 1604 flow [2025-02-06 13:02:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2025-02-06 13:02:25,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5837837837837838 [2025-02-06 13:02:25,164 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 1151 flow. Second operand 5 states and 108 transitions. [2025-02-06 13:02:25,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 128 transitions, 1604 flow [2025-02-06 13:02:25,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 128 transitions, 1551 flow, removed 16 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:25,211 INFO L231 Difference]: Finished difference. Result has 94 places, 100 transitions, 1239 flow [2025-02-06 13:02:25,211 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1239, PETRI_PLACES=94, PETRI_TRANSITIONS=100} [2025-02-06 13:02:25,212 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 58 predicate places. [2025-02-06 13:02:25,212 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 100 transitions, 1239 flow [2025-02-06 13:02:25,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:25,212 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:25,212 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:25,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-02-06 13:02:25,212 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:25,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash -897876192, now seen corresponding path program 5 times [2025-02-06 13:02:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:25,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018613414] [2025-02-06 13:02:25,213 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:02:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:25,223 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 4 equivalence classes. [2025-02-06 13:02:25,231 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:02:25,231 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:02:25,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:25,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:25,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018613414] [2025-02-06 13:02:25,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018613414] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:25,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:25,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:02:25,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857443037] [2025-02-06 13:02:25,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:25,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:25,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:25,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:25,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:25,334 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:25,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 1239 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:25,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:25,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:25,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:25,903 INFO L124 PetriNetUnfolderBase]: 1901/3340 cut-off events. [2025-02-06 13:02:25,903 INFO L125 PetriNetUnfolderBase]: For 17570/17570 co-relation queries the response was YES. [2025-02-06 13:02:25,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13488 conditions, 3340 events. 1901/3340 cut-off events. For 17570/17570 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 18291 event pairs, 970 based on Foata normal form. 30/3370 useless extension candidates. Maximal degree in co-relation 13429. Up to 1885 conditions per place. [2025-02-06 13:02:25,915 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 102 selfloop transitions, 33 changer transitions 9/145 dead transitions. [2025-02-06 13:02:25,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 145 transitions, 1770 flow [2025-02-06 13:02:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:02:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:02:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2025-02-06 13:02:25,916 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-02-06 13:02:25,916 INFO L175 Difference]: Start difference. First operand has 94 places, 100 transitions, 1239 flow. Second operand 7 states and 148 transitions. [2025-02-06 13:02:25,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 145 transitions, 1770 flow [2025-02-06 13:02:25,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 145 transitions, 1737 flow, removed 8 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:25,945 INFO L231 Difference]: Finished difference. Result has 102 places, 107 transitions, 1379 flow [2025-02-06 13:02:25,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1379, PETRI_PLACES=102, PETRI_TRANSITIONS=107} [2025-02-06 13:02:25,945 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2025-02-06 13:02:25,945 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 107 transitions, 1379 flow [2025-02-06 13:02:25,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:25,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:25,945 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:25,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-02-06 13:02:25,946 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:25,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:25,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1915613571, now seen corresponding path program 3 times [2025-02-06 13:02:25,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:25,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777376990] [2025-02-06 13:02:25,947 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:25,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:25,952 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-02-06 13:02:25,961 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 27 statements. [2025-02-06 13:02:25,961 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:02:25,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:26,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:26,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777376990] [2025-02-06 13:02:26,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777376990] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:26,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618903028] [2025-02-06 13:02:26,013 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:26,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:26,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:26,015 INFO L229 MonitoredProcess]: Starting monitored process 13 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 13:02:26,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 13:02:26,069 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-02-06 13:02:26,086 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 27 statements. [2025-02-06 13:02:26,087 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:02:26,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:26,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:02:26,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:26,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:26,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618903028] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:26,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:02:26,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2025-02-06 13:02:26,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192730160] [2025-02-06 13:02:26,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:26,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:26,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:26,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:26,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:02:26,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:26,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 107 transitions, 1379 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:26,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:26,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:26,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:26,527 INFO L124 PetriNetUnfolderBase]: 1839/3218 cut-off events. [2025-02-06 13:02:26,527 INFO L125 PetriNetUnfolderBase]: For 18188/18188 co-relation queries the response was YES. [2025-02-06 13:02:26,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13220 conditions, 3218 events. 1839/3218 cut-off events. For 18188/18188 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 17465 event pairs, 840 based on Foata normal form. 33/3251 useless extension candidates. Maximal degree in co-relation 13158. Up to 1861 conditions per place. [2025-02-06 13:02:26,540 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 85 selfloop transitions, 42 changer transitions 6/134 dead transitions. [2025-02-06 13:02:26,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 134 transitions, 1797 flow [2025-02-06 13:02:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2025-02-06 13:02:26,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2025-02-06 13:02:26,542 INFO L175 Difference]: Start difference. First operand has 102 places, 107 transitions, 1379 flow. Second operand 5 states and 105 transitions. [2025-02-06 13:02:26,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 134 transitions, 1797 flow [2025-02-06 13:02:26,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 134 transitions, 1646 flow, removed 11 selfloop flow, removed 9 redundant places. [2025-02-06 13:02:26,574 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 1319 flow [2025-02-06 13:02:26,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1319, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2025-02-06 13:02:26,575 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 60 predicate places. [2025-02-06 13:02:26,575 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 1319 flow [2025-02-06 13:02:26,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 13:02:26,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:26,575 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:26,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:26,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:26,776 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:26,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:26,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2006737179, now seen corresponding path program 1 times [2025-02-06 13:02:26,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:26,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721427649] [2025-02-06 13:02:26,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:26,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:26,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:02:26,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:02:26,804 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:26,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:27,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:27,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721427649] [2025-02-06 13:02:27,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721427649] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:27,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709258417] [2025-02-06 13:02:27,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:27,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:27,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:27,359 INFO L229 MonitoredProcess]: Starting monitored process 14 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 13:02:27,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 13:02:27,414 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:02:27,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:02:27,439 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:27,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:27,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-06 13:02:27,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:27,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 131 [2025-02-06 13:02:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:27,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:29,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:02:29,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 165 [2025-02-06 13:02:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709258417] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:29,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:29,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2025-02-06 13:02:29,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916458418] [2025-02-06 13:02:29,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:29,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 13:02:29,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:29,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 13:02:29,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2025-02-06 13:02:30,083 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:30,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 1319 flow. Second operand has 25 states, 25 states have (on average 12.64) internal successors, (316), 25 states have internal predecessors, (316), 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 13:02:30,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:30,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:30,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:34,045 INFO L124 PetriNetUnfolderBase]: 2694/4750 cut-off events. [2025-02-06 13:02:34,046 INFO L125 PetriNetUnfolderBase]: For 24285/24285 co-relation queries the response was YES. [2025-02-06 13:02:34,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19833 conditions, 4750 events. 2694/4750 cut-off events. For 24285/24285 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 28698 event pairs, 515 based on Foata normal form. 8/4758 useless extension candidates. Maximal degree in co-relation 19775. Up to 980 conditions per place. [2025-02-06 13:02:34,066 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 235 selfloop transitions, 228 changer transitions 37/501 dead transitions. [2025-02-06 13:02:34,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 501 transitions, 5450 flow [2025-02-06 13:02:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-06 13:02:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-02-06 13:02:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 840 transitions. [2025-02-06 13:02:34,068 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47297297297297297 [2025-02-06 13:02:34,068 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 1319 flow. Second operand 48 states and 840 transitions. [2025-02-06 13:02:34,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 501 transitions, 5450 flow [2025-02-06 13:02:34,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 501 transitions, 4939 flow, removed 46 selfloop flow, removed 7 redundant places. [2025-02-06 13:02:34,114 INFO L231 Difference]: Finished difference. Result has 153 places, 278 transitions, 3995 flow [2025-02-06 13:02:34,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=3995, PETRI_PLACES=153, PETRI_TRANSITIONS=278} [2025-02-06 13:02:34,115 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 117 predicate places. [2025-02-06 13:02:34,115 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 278 transitions, 3995 flow [2025-02-06 13:02:34,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.64) internal successors, (316), 25 states have internal predecessors, (316), 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 13:02:34,115 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:34,115 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:34,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:34,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:34,316 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:34,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:34,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2086512605, now seen corresponding path program 2 times [2025-02-06 13:02:34,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:34,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476322938] [2025-02-06 13:02:34,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:34,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:34,322 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:02:34,335 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 30 statements. [2025-02-06 13:02:34,336 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:02:34,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:34,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:34,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476322938] [2025-02-06 13:02:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476322938] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:34,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:34,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:02:34,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353743441] [2025-02-06 13:02:34,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:34,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:02:34,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:34,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:02:34,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:02:34,843 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:34,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 278 transitions, 3995 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 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 13:02:34,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:34,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:34,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:35,496 INFO L124 PetriNetUnfolderBase]: 2766/4867 cut-off events. [2025-02-06 13:02:35,497 INFO L125 PetriNetUnfolderBase]: For 31968/31968 co-relation queries the response was YES. [2025-02-06 13:02:35,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23118 conditions, 4867 events. 2766/4867 cut-off events. For 31968/31968 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 29754 event pairs, 1553 based on Foata normal form. 1/4868 useless extension candidates. Maximal degree in co-relation 23043. Up to 3608 conditions per place. [2025-02-06 13:02:35,530 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 275 selfloop transitions, 51 changer transitions 7/334 dead transitions. [2025-02-06 13:02:35,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 334 transitions, 5063 flow [2025-02-06 13:02:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2025-02-06 13:02:35,531 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4945945945945946 [2025-02-06 13:02:35,531 INFO L175 Difference]: Start difference. First operand has 153 places, 278 transitions, 3995 flow. Second operand 10 states and 183 transitions. [2025-02-06 13:02:35,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 334 transitions, 5063 flow [2025-02-06 13:02:35,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 334 transitions, 4586 flow, removed 223 selfloop flow, removed 7 redundant places. [2025-02-06 13:02:35,722 INFO L231 Difference]: Finished difference. Result has 155 places, 288 transitions, 3818 flow [2025-02-06 13:02:35,722 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3818, PETRI_PLACES=155, PETRI_TRANSITIONS=288} [2025-02-06 13:02:35,723 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 119 predicate places. [2025-02-06 13:02:35,723 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 288 transitions, 3818 flow [2025-02-06 13:02:35,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 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 13:02:35,723 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:35,723 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:35,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2025-02-06 13:02:35,723 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:35,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:35,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1633412713, now seen corresponding path program 3 times [2025-02-06 13:02:35,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:35,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535635713] [2025-02-06 13:02:35,724 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:35,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:35,733 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:02:35,758 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 30 statements. [2025-02-06 13:02:35,758 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:02:35,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:36,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:36,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535635713] [2025-02-06 13:02:36,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535635713] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:36,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908605480] [2025-02-06 13:02:36,170 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:36,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:36,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:36,172 INFO L229 MonitoredProcess]: Starting monitored process 15 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 13:02:36,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 13:02:36,222 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:02:36,239 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 30 statements. [2025-02-06 13:02:36,239 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:02:36,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:36,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 13:02:36,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:36,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 132 [2025-02-06 13:02:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:36,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:37,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:02:37,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 318 treesize of output 222 [2025-02-06 13:02:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:38,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908605480] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:38,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:38,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2025-02-06 13:02:38,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542211194] [2025-02-06 13:02:38,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:38,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 13:02:38,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:38,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 13:02:38,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2025-02-06 13:02:38,736 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:38,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 288 transitions, 3818 flow. Second operand has 22 states, 22 states have (on average 12.818181818181818) internal successors, (282), 22 states have internal predecessors, (282), 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 13:02:38,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:38,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:38,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:41,501 INFO L124 PetriNetUnfolderBase]: 3320/5830 cut-off events. [2025-02-06 13:02:41,501 INFO L125 PetriNetUnfolderBase]: For 35346/35346 co-relation queries the response was YES. [2025-02-06 13:02:41,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26978 conditions, 5830 events. 3320/5830 cut-off events. For 35346/35346 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 37057 event pairs, 921 based on Foata normal form. 8/5838 useless extension candidates. Maximal degree in co-relation 26905. Up to 2185 conditions per place. [2025-02-06 13:02:41,592 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 177 selfloop transitions, 306 changer transitions 24/508 dead transitions. [2025-02-06 13:02:41,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 508 transitions, 6685 flow [2025-02-06 13:02:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-06 13:02:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-02-06 13:02:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 511 transitions. [2025-02-06 13:02:41,597 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4603603603603604 [2025-02-06 13:02:41,597 INFO L175 Difference]: Start difference. First operand has 155 places, 288 transitions, 3818 flow. Second operand 30 states and 511 transitions. [2025-02-06 13:02:41,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 508 transitions, 6685 flow [2025-02-06 13:02:41,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 508 transitions, 6605 flow, removed 23 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:41,717 INFO L231 Difference]: Finished difference. Result has 190 places, 384 transitions, 6071 flow [2025-02-06 13:02:41,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3762, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6071, PETRI_PLACES=190, PETRI_TRANSITIONS=384} [2025-02-06 13:02:41,718 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 154 predicate places. [2025-02-06 13:02:41,718 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 384 transitions, 6071 flow [2025-02-06 13:02:41,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.818181818181818) internal successors, (282), 22 states have internal predecessors, (282), 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 13:02:41,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:41,719 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:41,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-06 13:02:41,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-06 13:02:41,919 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:41,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:41,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1700180941, now seen corresponding path program 4 times [2025-02-06 13:02:41,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:41,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925054540] [2025-02-06 13:02:41,920 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:02:41,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:41,925 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:02:41,944 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:02:41,944 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:02:41,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:42,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:42,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925054540] [2025-02-06 13:02:42,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925054540] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:42,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237745667] [2025-02-06 13:02:42,381 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:02:42,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:42,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:42,384 INFO L229 MonitoredProcess]: Starting monitored process 16 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 13:02:42,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 13:02:42,443 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:02:42,476 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:02:42,476 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:02:42,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:42,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-06 13:02:42,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:42,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 131 [2025-02-06 13:02:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:43,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:44,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:02:44,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 388 treesize of output 252 [2025-02-06 13:02:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:45,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237745667] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:45,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:45,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2025-02-06 13:02:45,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414694585] [2025-02-06 13:02:45,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:45,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 13:02:45,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:45,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 13:02:45,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2025-02-06 13:02:45,448 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:45,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 384 transitions, 6071 flow. Second operand has 25 states, 25 states have (on average 12.6) internal successors, (315), 25 states have internal predecessors, (315), 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 13:02:45,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:45,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:45,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:50,960 INFO L124 PetriNetUnfolderBase]: 4209/7679 cut-off events. [2025-02-06 13:02:50,960 INFO L125 PetriNetUnfolderBase]: For 74958/74958 co-relation queries the response was YES. [2025-02-06 13:02:50,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40790 conditions, 7679 events. 4209/7679 cut-off events. For 74958/74958 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 53482 event pairs, 795 based on Foata normal form. 17/7696 useless extension candidates. Maximal degree in co-relation 40705. Up to 2202 conditions per place. [2025-02-06 13:02:51,015 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 295 selfloop transitions, 505 changer transitions 63/864 dead transitions. [2025-02-06 13:02:51,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 864 transitions, 12213 flow [2025-02-06 13:02:51,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2025-02-06 13:02:51,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2025-02-06 13:02:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1113 transitions. [2025-02-06 13:02:51,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4489713594191206 [2025-02-06 13:02:51,018 INFO L175 Difference]: Start difference. First operand has 190 places, 384 transitions, 6071 flow. Second operand 67 states and 1113 transitions. [2025-02-06 13:02:51,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 864 transitions, 12213 flow [2025-02-06 13:02:51,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 864 transitions, 11803 flow, removed 116 selfloop flow, removed 13 redundant places. [2025-02-06 13:02:51,509 INFO L231 Difference]: Finished difference. Result has 256 places, 591 transitions, 10749 flow [2025-02-06 13:02:51,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=5803, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=10749, PETRI_PLACES=256, PETRI_TRANSITIONS=591} [2025-02-06 13:02:51,510 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 220 predicate places. [2025-02-06 13:02:51,510 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 591 transitions, 10749 flow [2025-02-06 13:02:51,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.6) internal successors, (315), 25 states have internal predecessors, (315), 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 13:02:51,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:51,510 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:51,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 13:02:51,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-06 13:02:51,711 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:51,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1285070619, now seen corresponding path program 5 times [2025-02-06 13:02:51,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:51,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951962966] [2025-02-06 13:02:51,712 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:02:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:51,719 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:02:51,732 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:02:51,732 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:02:51,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:52,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951962966] [2025-02-06 13:02:52,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951962966] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:52,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:52,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-02-06 13:02:52,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635572923] [2025-02-06 13:02:52,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:52,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:02:52,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:52,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:02:52,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:02:52,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:52,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 591 transitions, 10749 flow. Second operand has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 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 13:02:52,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:52,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:52,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:53,916 INFO L124 PetriNetUnfolderBase]: 4241/7719 cut-off events. [2025-02-06 13:02:53,916 INFO L125 PetriNetUnfolderBase]: For 92974/92974 co-relation queries the response was YES. [2025-02-06 13:02:53,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45618 conditions, 7719 events. 4241/7719 cut-off events. For 92974/92974 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 53977 event pairs, 2307 based on Foata normal form. 1/7720 useless extension candidates. Maximal degree in co-relation 45522. Up to 6134 conditions per place. [2025-02-06 13:02:53,975 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 557 selfloop transitions, 90 changer transitions 12/660 dead transitions. [2025-02-06 13:02:53,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 660 transitions, 12759 flow [2025-02-06 13:02:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:02:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:02:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2025-02-06 13:02:53,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49385749385749383 [2025-02-06 13:02:53,976 INFO L175 Difference]: Start difference. First operand has 256 places, 591 transitions, 10749 flow. Second operand 11 states and 201 transitions. [2025-02-06 13:02:53,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 660 transitions, 12759 flow [2025-02-06 13:02:55,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 660 transitions, 11946 flow, removed 393 selfloop flow, removed 8 redundant places. [2025-02-06 13:02:55,163 INFO L231 Difference]: Finished difference. Result has 256 places, 605 transitions, 10562 flow [2025-02-06 13:02:55,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=10050, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10562, PETRI_PLACES=256, PETRI_TRANSITIONS=605} [2025-02-06 13:02:55,163 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 220 predicate places. [2025-02-06 13:02:55,163 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 605 transitions, 10562 flow [2025-02-06 13:02:55,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 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 13:02:55,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:55,164 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:55,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-02-06 13:02:55,164 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:02:55,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash 839949755, now seen corresponding path program 6 times [2025-02-06 13:02:55,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:55,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885772930] [2025-02-06 13:02:55,164 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:02:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:55,174 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:02:55,191 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 30 statements. [2025-02-06 13:02:55,193 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:02:55,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:55,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:55,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885772930] [2025-02-06 13:02:55,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885772930] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:55,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508940695] [2025-02-06 13:02:55,722 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:02:55,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:55,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:55,724 INFO L229 MonitoredProcess]: Starting monitored process 17 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 13:02:55,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 13:02:55,784 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:02:55,807 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 30 statements. [2025-02-06 13:02:55,807 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:02:55,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:55,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 13:02:55,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:56,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 78 [2025-02-06 13:02:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:56,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:57,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:02:57,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 417 treesize of output 257 [2025-02-06 13:02:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:57,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508940695] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:57,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:57,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2025-02-06 13:02:57,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966482202] [2025-02-06 13:02:57,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:57,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 13:02:57,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:57,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 13:02:57,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2025-02-06 13:02:58,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:02:58,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 605 transitions, 10562 flow. Second operand has 22 states, 22 states have (on average 12.772727272727273) internal successors, (281), 22 states have internal predecessors, (281), 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 13:02:58,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:58,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:02:58,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:00,361 INFO L124 PetriNetUnfolderBase]: 4242/7822 cut-off events. [2025-02-06 13:03:00,361 INFO L125 PetriNetUnfolderBase]: For 65539/65539 co-relation queries the response was YES. [2025-02-06 13:03:00,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42593 conditions, 7822 events. 4242/7822 cut-off events. For 65539/65539 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 55336 event pairs, 1252 based on Foata normal form. 5/7827 useless extension candidates. Maximal degree in co-relation 42497. Up to 3390 conditions per place. [2025-02-06 13:03:00,421 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 183 selfloop transitions, 506 changer transitions 26/716 dead transitions. [2025-02-06 13:03:00,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 716 transitions, 12641 flow [2025-02-06 13:03:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-06 13:03:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-02-06 13:03:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 391 transitions. [2025-02-06 13:03:00,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48034398034398035 [2025-02-06 13:03:00,422 INFO L175 Difference]: Start difference. First operand has 256 places, 605 transitions, 10562 flow. Second operand 22 states and 391 transitions. [2025-02-06 13:03:00,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 716 transitions, 12641 flow [2025-02-06 13:03:00,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 716 transitions, 12375 flow, removed 11 selfloop flow, removed 8 redundant places. [2025-02-06 13:03:00,931 INFO L231 Difference]: Finished difference. Result has 274 places, 625 transitions, 12267 flow [2025-02-06 13:03:00,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=10293, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12267, PETRI_PLACES=274, PETRI_TRANSITIONS=625} [2025-02-06 13:03:00,931 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 238 predicate places. [2025-02-06 13:03:00,931 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 625 transitions, 12267 flow [2025-02-06 13:03:00,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.772727272727273) internal successors, (281), 22 states have internal predecessors, (281), 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 13:03:00,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:00,932 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:00,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-06 13:03:01,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:01,132 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:03:01,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash 337561289, now seen corresponding path program 7 times [2025-02-06 13:03:01,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:01,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774239015] [2025-02-06 13:03:01,133 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:03:01,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:01,139 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:03:01,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:03:01,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:03:01,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:01,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:01,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774239015] [2025-02-06 13:03:01,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774239015] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:03:01,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991820050] [2025-02-06 13:03:01,587 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:03:01,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:01,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:03:01,589 INFO L229 MonitoredProcess]: Starting monitored process 18 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 13:03:01,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 13:03:01,645 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:03:01,664 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:03:01,664 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:03:01,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:01,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-06 13:03:01,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:03:01,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 135 [2025-02-06 13:03:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:02,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:03:03,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:03:03,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 197 [2025-02-06 13:03:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:03,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991820050] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:03:03,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:03:03,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2025-02-06 13:03:03,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126205433] [2025-02-06 13:03:03,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:03:03,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 13:03:03,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:03,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 13:03:03,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2025-02-06 13:03:03,888 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:03:03,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 625 transitions, 12267 flow. Second operand has 26 states, 26 states have (on average 12.5) internal successors, (325), 26 states have internal predecessors, (325), 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 13:03:03,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:03,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:03:03,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:08,076 INFO L124 PetriNetUnfolderBase]: 4646/8609 cut-off events. [2025-02-06 13:03:08,076 INFO L125 PetriNetUnfolderBase]: For 85903/85903 co-relation queries the response was YES. [2025-02-06 13:03:08,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50716 conditions, 8609 events. 4646/8609 cut-off events. For 85903/85903 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 62110 event pairs, 1295 based on Foata normal form. 11/8620 useless extension candidates. Maximal degree in co-relation 50616. Up to 3244 conditions per place. [2025-02-06 13:03:08,200 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 273 selfloop transitions, 617 changer transitions 35/926 dead transitions. [2025-02-06 13:03:08,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 926 transitions, 17404 flow [2025-02-06 13:03:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-06 13:03:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-02-06 13:03:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 637 transitions. [2025-02-06 13:03:08,202 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47822822822822825 [2025-02-06 13:03:08,202 INFO L175 Difference]: Start difference. First operand has 274 places, 625 transitions, 12267 flow. Second operand 36 states and 637 transitions. [2025-02-06 13:03:08,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 926 transitions, 17404 flow [2025-02-06 13:03:08,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 926 transitions, 17207 flow, removed 32 selfloop flow, removed 8 redundant places. [2025-02-06 13:03:08,841 INFO L231 Difference]: Finished difference. Result has 310 places, 750 transitions, 16657 flow [2025-02-06 13:03:08,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12123, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=499, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=16657, PETRI_PLACES=310, PETRI_TRANSITIONS=750} [2025-02-06 13:03:08,842 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 274 predicate places. [2025-02-06 13:03:08,843 INFO L471 AbstractCegarLoop]: Abstraction has has 310 places, 750 transitions, 16657 flow [2025-02-06 13:03:08,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.5) internal successors, (325), 26 states have internal predecessors, (325), 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 13:03:08,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:08,843 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:08,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 13:03:09,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:09,044 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:03:09,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1897490181, now seen corresponding path program 8 times [2025-02-06 13:03:09,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:09,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921086679] [2025-02-06 13:03:09,045 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:03:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:09,050 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:03:09,063 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:03:09,063 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:03:09,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:09,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:09,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921086679] [2025-02-06 13:03:09,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921086679] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:03:09,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383555347] [2025-02-06 13:03:09,824 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:03:09,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:09,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:03:09,826 INFO L229 MonitoredProcess]: Starting monitored process 19 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 13:03:09,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 13:03:09,879 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:03:09,899 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:03:09,899 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:03:09,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:09,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 13:03:09,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:03:10,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2025-02-06 13:03:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:10,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:03:11,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:03:11,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 184 [2025-02-06 13:03:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:12,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383555347] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:03:12,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:03:12,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2025-02-06 13:03:12,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655534531] [2025-02-06 13:03:12,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:03:12,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-06 13:03:12,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:12,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-06 13:03:12,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2025-02-06 13:03:12,407 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:03:12,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 750 transitions, 16657 flow. Second operand has 33 states, 33 states have (on average 12.030303030303031) internal successors, (397), 33 states have internal predecessors, (397), 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 13:03:12,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:12,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:03:12,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:16,102 INFO L124 PetriNetUnfolderBase]: 4724/8746 cut-off events. [2025-02-06 13:03:16,103 INFO L125 PetriNetUnfolderBase]: For 113960/113960 co-relation queries the response was YES. [2025-02-06 13:03:16,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57132 conditions, 8746 events. 4724/8746 cut-off events. For 113960/113960 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 63343 event pairs, 1116 based on Foata normal form. 1/8747 useless extension candidates. Maximal degree in co-relation 57022. Up to 2527 conditions per place. [2025-02-06 13:03:16,178 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 522 selfloop transitions, 522 changer transitions 21/1066 dead transitions. [2025-02-06 13:03:16,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1066 transitions, 23430 flow [2025-02-06 13:03:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-06 13:03:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-02-06 13:03:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 609 transitions. [2025-02-06 13:03:16,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4702702702702703 [2025-02-06 13:03:16,180 INFO L175 Difference]: Start difference. First operand has 310 places, 750 transitions, 16657 flow. Second operand 35 states and 609 transitions. [2025-02-06 13:03:16,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1066 transitions, 23430 flow [2025-02-06 13:03:17,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1066 transitions, 22468 flow, removed 238 selfloop flow, removed 11 redundant places. [2025-02-06 13:03:17,197 INFO L231 Difference]: Finished difference. Result has 345 places, 835 transitions, 19160 flow [2025-02-06 13:03:17,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=15918, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=19160, PETRI_PLACES=345, PETRI_TRANSITIONS=835} [2025-02-06 13:03:17,198 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 309 predicate places. [2025-02-06 13:03:17,198 INFO L471 AbstractCegarLoop]: Abstraction has has 345 places, 835 transitions, 19160 flow [2025-02-06 13:03:17,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 12.030303030303031) internal successors, (397), 33 states have internal predecessors, (397), 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 13:03:17,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:17,198 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:17,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-06 13:03:17,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:17,399 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:03:17,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash -268698587, now seen corresponding path program 9 times [2025-02-06 13:03:17,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:17,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499635819] [2025-02-06 13:03:17,399 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:03:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:17,404 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:03:17,413 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 30 statements. [2025-02-06 13:03:17,414 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:03:17,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:17,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499635819] [2025-02-06 13:03:17,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499635819] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:03:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334681941] [2025-02-06 13:03:17,904 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:03:17,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:17,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:03:17,907 INFO L229 MonitoredProcess]: Starting monitored process 20 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 13:03:17,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-06 13:03:17,959 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:03:17,975 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 30 statements. [2025-02-06 13:03:17,975 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:03:17,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:17,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-06 13:03:17,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:03:18,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 89 [2025-02-06 13:03:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:18,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:03:19,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:03:19,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 258 treesize of output 170 [2025-02-06 13:03:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:19,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334681941] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:03:19,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:03:19,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2025-02-06 13:03:19,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026256429] [2025-02-06 13:03:19,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:03:19,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 13:03:19,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:19,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 13:03:19,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2025-02-06 13:03:19,918 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:03:19,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 835 transitions, 19160 flow. Second operand has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 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 13:03:19,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:19,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:03:19,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:23,090 INFO L124 PetriNetUnfolderBase]: 4740/8930 cut-off events. [2025-02-06 13:03:23,090 INFO L125 PetriNetUnfolderBase]: For 121964/121964 co-relation queries the response was YES. [2025-02-06 13:03:23,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63135 conditions, 8930 events. 4740/8930 cut-off events. For 121964/121964 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 66252 event pairs, 1677 based on Foata normal form. 3/8933 useless extension candidates. Maximal degree in co-relation 63016. Up to 4701 conditions per place. [2025-02-06 13:03:23,165 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 460 selfloop transitions, 528 changer transitions 17/1006 dead transitions. [2025-02-06 13:03:23,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1006 transitions, 23398 flow [2025-02-06 13:03:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-06 13:03:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-02-06 13:03:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 378 transitions. [2025-02-06 13:03:23,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4643734643734644 [2025-02-06 13:03:23,167 INFO L175 Difference]: Start difference. First operand has 345 places, 835 transitions, 19160 flow. Second operand 22 states and 378 transitions. [2025-02-06 13:03:23,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1006 transitions, 23398 flow [2025-02-06 13:03:24,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1006 transitions, 22427 flow, removed 124 selfloop flow, removed 8 redundant places. [2025-02-06 13:03:24,406 INFO L231 Difference]: Finished difference. Result has 364 places, 894 transitions, 21231 flow [2025-02-06 13:03:24,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=18301, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=21231, PETRI_PLACES=364, PETRI_TRANSITIONS=894} [2025-02-06 13:03:24,407 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 328 predicate places. [2025-02-06 13:03:24,407 INFO L471 AbstractCegarLoop]: Abstraction has has 364 places, 894 transitions, 21231 flow [2025-02-06 13:03:24,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 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 13:03:24,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:24,407 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:24,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 13:03:24,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:24,608 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:03:24,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1874204645, now seen corresponding path program 10 times [2025-02-06 13:03:24,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:24,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362387620] [2025-02-06 13:03:24,608 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:03:24,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:24,613 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:03:24,619 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:03:24,619 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:03:24,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:24,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362387620] [2025-02-06 13:03:24,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362387620] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:03:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277530405] [2025-02-06 13:03:24,991 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:03:24,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:24,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:03:24,993 INFO L229 MonitoredProcess]: Starting monitored process 21 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 13:03:24,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-06 13:03:25,056 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:03:25,079 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:03:25,079 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:03:25,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:25,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 13:03:25,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:03:25,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 104 [2025-02-06 13:03:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:25,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:03:26,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:03:26,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 159 [2025-02-06 13:03:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:26,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277530405] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:03:26,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:03:26,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2025-02-06 13:03:26,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055423426] [2025-02-06 13:03:26,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:03:26,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:03:26,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:26,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:03:26,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:03:27,010 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2025-02-06 13:03:27,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 894 transitions, 21231 flow. Second operand has 24 states, 24 states have (on average 12.666666666666666) internal successors, (304), 24 states have internal predecessors, (304), 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 13:03:27,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:27,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2025-02-06 13:03:27,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:31,131 INFO L124 PetriNetUnfolderBase]: 4803/9043 cut-off events. [2025-02-06 13:03:31,131 INFO L125 PetriNetUnfolderBase]: For 126851/126851 co-relation queries the response was YES. [2025-02-06 13:03:31,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64776 conditions, 9043 events. 4803/9043 cut-off events. For 126851/126851 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 67164 event pairs, 1032 based on Foata normal form. 6/9049 useless extension candidates. Maximal degree in co-relation 64651. Up to 2980 conditions per place. [2025-02-06 13:03:31,239 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 284 selfloop transitions, 767 changer transitions 25/1077 dead transitions. [2025-02-06 13:03:31,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1077 transitions, 25435 flow [2025-02-06 13:03:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-06 13:03:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-02-06 13:03:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 566 transitions. [2025-02-06 13:03:31,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46355446355446356 [2025-02-06 13:03:31,241 INFO L175 Difference]: Start difference. First operand has 364 places, 894 transitions, 21231 flow. Second operand 33 states and 566 transitions. [2025-02-06 13:03:31,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1077 transitions, 25435 flow [2025-02-06 13:03:32,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1077 transitions, 25273 flow, removed 58 selfloop flow, removed 8 redundant places. [2025-02-06 13:03:32,586 INFO L231 Difference]: Finished difference. Result has 391 places, 953 transitions, 24337 flow [2025-02-06 13:03:32,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=21082, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=707, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=24337, PETRI_PLACES=391, PETRI_TRANSITIONS=953} [2025-02-06 13:03:32,587 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 355 predicate places. [2025-02-06 13:03:32,587 INFO L471 AbstractCegarLoop]: Abstraction has has 391 places, 953 transitions, 24337 flow [2025-02-06 13:03:32,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.666666666666666) internal successors, (304), 24 states have internal predecessors, (304), 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 13:03:32,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:32,587 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:32,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-06 13:03:32,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:32,787 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:03:32,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:32,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1730721147, now seen corresponding path program 11 times [2025-02-06 13:03:32,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:32,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092890627] [2025-02-06 13:03:32,788 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:03:32,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:32,794 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:03:32,803 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:03:32,803 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:03:32,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:33,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092890627] [2025-02-06 13:03:33,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092890627] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:03:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963522751] [2025-02-06 13:03:33,268 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:03:33,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:03:33,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:03:33,270 INFO L229 MonitoredProcess]: Starting monitored process 22 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 13:03:33,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-06 13:03:33,330 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:03:33,349 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:03:33,350 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:03:33,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:33,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-06 13:03:33,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:03:33,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 132 [2025-02-06 13:03:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:03:33,836 INFO L312 TraceCheckSpWp]: Computing backward predicates...