./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.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 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:05:49,247 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:05:49,309 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:05:49,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:05:49,314 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:05:49,333 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:05:49,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:05:49,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:05:49,334 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:05:49,334 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:05:49,335 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:05:49,335 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:05:49,335 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:05:49,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:05:49,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:05:49,336 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:05:49,337 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:05:49,337 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:05:49,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:05:49,337 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 -> 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 [2025-02-06 13:05:49,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:05:49,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:05:49,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:05:49,589 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:05:49,589 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:05:49,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-02-06 13:05:50,706 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b41ad3530/a6e15f4f2bbb4128b6132ea243273af2/FLAG96874c5a7 [2025-02-06 13:05:50,954 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:05:50,954 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-02-06 13:05:50,959 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b41ad3530/a6e15f4f2bbb4128b6132ea243273af2/FLAG96874c5a7 [2025-02-06 13:05:50,971 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b41ad3530/a6e15f4f2bbb4128b6132ea243273af2 [2025-02-06 13:05:50,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:05:50,974 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:05:50,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:05:50,974 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:05:50,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:05:50,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:05:50" (1/1) ... [2025-02-06 13:05:50,978 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a9b5cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:50, skipping insertion in model container [2025-02-06 13:05:50,978 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:05:50" (1/1) ... [2025-02-06 13:05:50,992 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:05:51,108 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 13:05:51,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:05:51,130 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:05:51,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:05:51,165 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:05:51,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51 WrapperNode [2025-02-06 13:05:51,166 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:05:51,167 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:05:51,167 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:05:51,167 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:05:51,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,179 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,201 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 127 [2025-02-06 13:05:51,202 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:05:51,202 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:05:51,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:05:51,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:05:51,210 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,213 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,234 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 13:05:51,235 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,242 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,246 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,247 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:05:51,253 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:05:51,253 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:05:51,253 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:05:51,254 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (1/1) ... [2025-02-06 13:05:51,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:05:51,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:51,282 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 13:05:51,286 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 13:05:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:05:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:05:51,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:05:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:05:51,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:05:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:05:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:05:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:05:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:05:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:05:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:05:51,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:05:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:05:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:05:51,308 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 13:05:51,394 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:05:51,395 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:05:51,629 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:05:51,629 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:05:51,754 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:05:51,755 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:05:51,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:05:51 BoogieIcfgContainer [2025-02-06 13:05:51,755 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:05:51,756 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:05:51,756 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:05:51,759 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:05:51,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:05:50" (1/3) ... [2025-02-06 13:05:51,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5e6a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:05:51, skipping insertion in model container [2025-02-06 13:05:51,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:51" (2/3) ... [2025-02-06 13:05:51,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5e6a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:05:51, skipping insertion in model container [2025-02-06 13:05:51,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:05:51" (3/3) ... [2025-02-06 13:05:51,765 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2025-02-06 13:05:51,775 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:05:51,776 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-02-06 13:05:51,776 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:05:51,824 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:05:51,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2025-02-06 13:05:51,881 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2025-02-06 13:05:51,884 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:05:51,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 66 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2025-02-06 13:05:51,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2025-02-06 13:05:51,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2025-02-06 13:05:51,897 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:05:51,905 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;@3db28c25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:05:51,905 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-02-06 13:05:51,910 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:05:51,910 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:05:51,910 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:05:51,910 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:51,911 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:05:51,912 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 13:05:51,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash 385404, now seen corresponding path program 1 times [2025-02-06 13:05:51,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:51,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855904327] [2025-02-06 13:05:51,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:51,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:51,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:05:52,005 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:05:52,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:52,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:52,120 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 13:05:52,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:52,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855904327] [2025-02-06 13:05:52,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855904327] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:52,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:52,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:05:52,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919205031] [2025-02-06 13:05:52,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:52,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:05:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:52,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:05:52,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:05:52,165 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:05:52,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 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 13:05:52,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:52,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:05:52,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:52,278 INFO L124 PetriNetUnfolderBase]: 92/179 cut-off events. [2025-02-06 13:05:52,279 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-06 13:05:52,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 179 events. 92/179 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 603 event pairs, 68 based on Foata normal form. 1/168 useless extension candidates. Maximal degree in co-relation 315. Up to 160 conditions per place. [2025-02-06 13:05:52,282 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 19 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2025-02-06 13:05:52,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 112 flow [2025-02-06 13:05:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:05:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:05:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2025-02-06 13:05:52,296 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-02-06 13:05:52,297 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 56 transitions. [2025-02-06 13:05:52,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 112 flow [2025-02-06 13:05:52,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:05:52,303 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2025-02-06 13:05:52,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, 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 13:05:52,307 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-02-06 13:05:52,308 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2025-02-06 13:05:52,308 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 13:05:52,308 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:52,308 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:05:52,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:05:52,308 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 13:05:52,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash 385405, now seen corresponding path program 1 times [2025-02-06 13:05:52,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:52,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581424875] [2025-02-06 13:05:52,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:52,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:05:52,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:05:52,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:52,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:52,587 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 13:05:52,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:52,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581424875] [2025-02-06 13:05:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581424875] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:52,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:52,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:05:52,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658681101] [2025-02-06 13:05:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:52,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:52,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:52,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:52,608 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:05:52,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:52,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:52,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:05:52,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:52,710 INFO L124 PetriNetUnfolderBase]: 92/178 cut-off events. [2025-02-06 13:05:52,710 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:05:52,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 178 events. 92/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 614 event pairs, 68 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 338. Up to 160 conditions per place. [2025-02-06 13:05:52,715 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2025-02-06 13:05:52,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 28 transitions, 106 flow [2025-02-06 13:05:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2025-02-06 13:05:52,716 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2025-02-06 13:05:52,716 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 66 transitions. [2025-02-06 13:05:52,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 28 transitions, 106 flow [2025-02-06 13:05:52,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 102 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:52,717 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 68 flow [2025-02-06 13:05:52,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, 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=4, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2025-02-06 13:05:52,718 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-02-06 13:05:52,718 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 68 flow [2025-02-06 13:05:52,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:52,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:52,718 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:05:52,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:05:52,719 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:52,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:52,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1400906315, now seen corresponding path program 1 times [2025-02-06 13:05:52,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:52,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654649905] [2025-02-06 13:05:52,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:52,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:52,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:05:52,735 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:05:52,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:52,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:52,790 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 13:05:52,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:52,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654649905] [2025-02-06 13:05:52,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654649905] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:52,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:52,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:05:52,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452502134] [2025-02-06 13:05:52,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:52,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:52,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:52,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:52,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:52,811 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2025-02-06 13:05:52,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 13:05:52,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:52,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2025-02-06 13:05:52,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:52,875 INFO L124 PetriNetUnfolderBase]: 92/173 cut-off events. [2025-02-06 13:05:52,876 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:05:52,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 173 events. 92/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 568 event pairs, 68 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 333. Up to 159 conditions per place. [2025-02-06 13:05:52,877 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 19 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2025-02-06 13:05:52,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 106 flow [2025-02-06 13:05:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-02-06 13:05:52,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2025-02-06 13:05:52,878 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 68 flow. Second operand 4 states and 59 transitions. [2025-02-06 13:05:52,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 106 flow [2025-02-06 13:05:52,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 98 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:05:52,879 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 60 flow [2025-02-06 13:05:52,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2025-02-06 13:05:52,880 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2025-02-06 13:05:52,880 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 60 flow [2025-02-06 13:05:52,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 13:05:52,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:52,881 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:05:52,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:05:52,881 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:52,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1400906314, now seen corresponding path program 1 times [2025-02-06 13:05:52,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:52,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148039650] [2025-02-06 13:05:52,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:52,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:52,886 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:05:52,891 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:05:52,891 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:52,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:52,945 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 13:05:52,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:52,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148039650] [2025-02-06 13:05:52,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148039650] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:52,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:52,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:05:52,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33312291] [2025-02-06 13:05:52,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:52,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:52,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:52,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:52,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:52,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:05:52,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 13:05:52,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:52,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:05:52,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:53,085 INFO L124 PetriNetUnfolderBase]: 154/300 cut-off events. [2025-02-06 13:05:53,085 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:05:53,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 300 events. 154/300 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1146 event pairs, 101 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 394. Up to 192 conditions per place. [2025-02-06 13:05:53,087 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 42 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2025-02-06 13:05:53,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 51 transitions, 211 flow [2025-02-06 13:05:53,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2025-02-06 13:05:53,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2025-02-06 13:05:53,090 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 60 flow. Second operand 5 states and 103 transitions. [2025-02-06 13:05:53,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 51 transitions, 211 flow [2025-02-06 13:05:53,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:53,092 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 94 flow [2025-02-06 13:05:53,092 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2025-02-06 13:05:53,092 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-02-06 13:05:53,092 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 94 flow [2025-02-06 13:05:53,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 13:05:53,093 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:53,093 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:53,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:05:53,093 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:53,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:53,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1976187604, now seen corresponding path program 1 times [2025-02-06 13:05:53,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:53,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947227286] [2025-02-06 13:05:53,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:53,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:53,099 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:05:53,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:05:53,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:53,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:53,163 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 13:05:53,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:53,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947227286] [2025-02-06 13:05:53,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947227286] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:53,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:53,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:05:53,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558631428] [2025-02-06 13:05:53,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:53,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:05:53,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:53,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:05:53,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:05:53,172 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:05:53,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:53,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:53,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:05:53,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:53,248 INFO L124 PetriNetUnfolderBase]: 130/257 cut-off events. [2025-02-06 13:05:53,248 INFO L125 PetriNetUnfolderBase]: For 74/86 co-relation queries the response was YES. [2025-02-06 13:05:53,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 257 events. 130/257 cut-off events. For 74/86 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 917 event pairs, 96 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 427. Up to 190 conditions per place. [2025-02-06 13:05:53,250 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 35 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2025-02-06 13:05:53,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 215 flow [2025-02-06 13:05:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:05:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:05:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-02-06 13:05:53,251 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2025-02-06 13:05:53,251 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 94 flow. Second operand 5 states and 96 transitions. [2025-02-06 13:05:53,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 215 flow [2025-02-06 13:05:53,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:05:53,252 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 117 flow [2025-02-06 13:05:53,252 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2025-02-06 13:05:53,253 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2025-02-06 13:05:53,253 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 117 flow [2025-02-06 13:05:53,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:53,253 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:53,253 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:53,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:05:53,253 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:53,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash 422842717, now seen corresponding path program 1 times [2025-02-06 13:05:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:53,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739020226] [2025-02-06 13:05:53,254 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:53,259 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:05:53,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:05:53,263 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:53,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:53,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:53,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739020226] [2025-02-06 13:05:53,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739020226] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:53,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275170663] [2025-02-06 13:05:53,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:53,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:53,413 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 13:05:53,414 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 13:05:53,451 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:05:53,461 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:05:53,461 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:53,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:53,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:05:53,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:53,498 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 13:05:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:53,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:53,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275170663] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:53,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:05:53,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 6 [2025-02-06 13:05:53,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895603747] [2025-02-06 13:05:53,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:53,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:05:53,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:53,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:05:53,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:05:53,645 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:05:53,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 13:05:53,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:53,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:05:53,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:53,795 INFO L124 PetriNetUnfolderBase]: 160/309 cut-off events. [2025-02-06 13:05:53,796 INFO L125 PetriNetUnfolderBase]: For 119/135 co-relation queries the response was YES. [2025-02-06 13:05:53,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 309 events. 160/309 cut-off events. For 119/135 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1199 event pairs, 75 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 578. Up to 130 conditions per place. [2025-02-06 13:05:53,797 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 38 selfloop transitions, 8 changer transitions 0/50 dead transitions. [2025-02-06 13:05:53,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 256 flow [2025-02-06 13:05:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:05:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:05:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2025-02-06 13:05:53,798 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2025-02-06 13:05:53,798 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 117 flow. Second operand 6 states and 113 transitions. [2025-02-06 13:05:53,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 256 flow [2025-02-06 13:05:53,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:53,800 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 149 flow [2025-02-06 13:05:53,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2025-02-06 13:05:53,801 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2025-02-06 13:05:53,801 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 149 flow [2025-02-06 13:05:53,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 13:05:53,801 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:53,801 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:53,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:05:54,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:54,002 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:54,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:54,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1700025581, now seen corresponding path program 1 times [2025-02-06 13:05:54,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:54,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643672127] [2025-02-06 13:05:54,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:54,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:54,008 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:05:54,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:05:54,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:54,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:54,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:54,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643672127] [2025-02-06 13:05:54,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643672127] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:54,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221450378] [2025-02-06 13:05:54,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:54,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:54,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:54,139 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 13:05:54,141 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 13:05:54,188 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:05:54,200 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:05:54,200 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:54,200 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:54,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:05:54,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:54,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:54,314 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 13:05:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:54,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221450378] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:54,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:54,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-06 13:05:54,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426052431] [2025-02-06 13:05:54,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:54,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:05:54,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:54,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:05:54,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:05:54,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:05:54,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 149 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 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 13:05:54,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:54,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:05:54,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:54,561 INFO L124 PetriNetUnfolderBase]: 240/446 cut-off events. [2025-02-06 13:05:54,561 INFO L125 PetriNetUnfolderBase]: For 575/631 co-relation queries the response was YES. [2025-02-06 13:05:54,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 446 events. 240/446 cut-off events. For 575/631 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1726 event pairs, 88 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 1079. Up to 179 conditions per place. [2025-02-06 13:05:54,563 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 51 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2025-02-06 13:05:54,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 389 flow [2025-02-06 13:05:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:05:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:05:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2025-02-06 13:05:54,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5387755102040817 [2025-02-06 13:05:54,564 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 149 flow. Second operand 7 states and 132 transitions. [2025-02-06 13:05:54,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 389 flow [2025-02-06 13:05:54,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 375 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-02-06 13:05:54,567 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 180 flow [2025-02-06 13:05:54,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2025-02-06 13:05:54,572 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2025-02-06 13:05:54,572 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 180 flow [2025-02-06 13:05:54,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 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 13:05:54,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:54,572 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:54,580 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 13:05:54,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:54,773 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:54,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:54,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1419887618, now seen corresponding path program 1 times [2025-02-06 13:05:54,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:54,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520910054] [2025-02-06 13:05:54,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:54,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:54,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:05:54,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:05:54,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:54,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:54,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:54,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520910054] [2025-02-06 13:05:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520910054] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:54,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712290987] [2025-02-06 13:05:54,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:54,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:54,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:54,879 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 13:05:54,880 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 13:05:54,914 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:05:54,926 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:05:54,926 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:54,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:54,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:05:54,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:54,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:55,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712290987] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:55,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:55,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:05:55,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011622332] [2025-02-06 13:05:55,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:55,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:05:55,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:55,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:05:55,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:05:55,069 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:05:55,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 180 flow. Second operand has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 14 states have internal predecessors, (184), 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 13:05:55,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:55,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:05:55,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:55,276 INFO L124 PetriNetUnfolderBase]: 481/891 cut-off events. [2025-02-06 13:05:55,276 INFO L125 PetriNetUnfolderBase]: For 1078/1106 co-relation queries the response was YES. [2025-02-06 13:05:55,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 891 events. 481/891 cut-off events. For 1078/1106 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4003 event pairs, 252 based on Foata normal form. 18/908 useless extension candidates. Maximal degree in co-relation 1410. Up to 410 conditions per place. [2025-02-06 13:05:55,282 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 70 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2025-02-06 13:05:55,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 577 flow [2025-02-06 13:05:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:05:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:05:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2025-02-06 13:05:55,283 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-02-06 13:05:55,283 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 180 flow. Second operand 8 states and 152 transitions. [2025-02-06 13:05:55,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 577 flow [2025-02-06 13:05:55,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 87 transitions, 556 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-02-06 13:05:55,287 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 271 flow [2025-02-06 13:05:55,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=271, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2025-02-06 13:05:55,288 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2025-02-06 13:05:55,288 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 271 flow [2025-02-06 13:05:55,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 14 states have internal predecessors, (184), 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 13:05:55,288 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:55,288 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:55,296 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 13:05:55,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:55,489 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:55,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1974985223, now seen corresponding path program 1 times [2025-02-06 13:05:55,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:55,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737903094] [2025-02-06 13:05:55,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:55,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:55,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:05:55,501 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:05:55,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:55,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:55,526 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 13:05:55,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:55,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737903094] [2025-02-06 13:05:55,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737903094] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:55,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:55,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:05:55,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543188943] [2025-02-06 13:05:55,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:55,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:05:55,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:55,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:05:55,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:05:55,527 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-02-06 13:05:55,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:55,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:55,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-02-06 13:05:55,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:55,640 INFO L124 PetriNetUnfolderBase]: 436/854 cut-off events. [2025-02-06 13:05:55,640 INFO L125 PetriNetUnfolderBase]: For 2080/2164 co-relation queries the response was YES. [2025-02-06 13:05:55,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2900 conditions, 854 events. 436/854 cut-off events. For 2080/2164 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4251 event pairs, 122 based on Foata normal form. 3/854 useless extension candidates. Maximal degree in co-relation 1407. Up to 526 conditions per place. [2025-02-06 13:05:55,645 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 45 selfloop transitions, 3 changer transitions 6/59 dead transitions. [2025-02-06 13:05:55,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 458 flow [2025-02-06 13:05:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:05:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:05:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2025-02-06 13:05:55,646 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2025-02-06 13:05:55,646 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 271 flow. Second operand 3 states and 71 transitions. [2025-02-06 13:05:55,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 458 flow [2025-02-06 13:05:55,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 445 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-02-06 13:05:55,649 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 240 flow [2025-02-06 13:05:55,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2025-02-06 13:05:55,649 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2025-02-06 13:05:55,649 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 240 flow [2025-02-06 13:05:55,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:05:55,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:55,649 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:55,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:05:55,650 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:55,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:55,650 INFO L85 PathProgramCache]: Analyzing trace with hash -900440471, now seen corresponding path program 2 times [2025-02-06 13:05:55,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:55,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445695608] [2025-02-06 13:05:55,650 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:55,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:55,655 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-06 13:05:55,663 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:05:55,663 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:05:55,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:55,845 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 13:05:55,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:55,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445695608] [2025-02-06 13:05:55,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445695608] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:55,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054991812] [2025-02-06 13:05:55,846 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:55,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:55,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:55,848 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 13:05:55,850 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 13:05:55,883 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-06 13:05:55,896 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:05:55,896 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:05:55,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:55,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:05:55,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:05:56,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:56,144 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 13:05:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:05:56,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054991812] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:56,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:56,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-02-06 13:05:56,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832263034] [2025-02-06 13:05:56,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:56,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:05:56,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:56,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:05:56,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:05:56,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:05:56,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 240 flow. Second operand has 20 states, 20 states have (on average 12.05) internal successors, (241), 20 states have internal predecessors, (241), 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 13:05:56,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:56,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:05:56,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:57,362 INFO L124 PetriNetUnfolderBase]: 673/1179 cut-off events. [2025-02-06 13:05:57,363 INFO L125 PetriNetUnfolderBase]: For 1887/1959 co-relation queries the response was YES. [2025-02-06 13:05:57,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4204 conditions, 1179 events. 673/1179 cut-off events. For 1887/1959 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5407 event pairs, 120 based on Foata normal form. 36/1215 useless extension candidates. Maximal degree in co-relation 2710. Up to 195 conditions per place. [2025-02-06 13:05:57,372 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 128 selfloop transitions, 18 changer transitions 0/149 dead transitions. [2025-02-06 13:05:57,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 149 transitions, 1042 flow [2025-02-06 13:05:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:05:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:05:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 254 transitions. [2025-02-06 13:05:57,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5183673469387755 [2025-02-06 13:05:57,375 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 240 flow. Second operand 14 states and 254 transitions. [2025-02-06 13:05:57,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 149 transitions, 1042 flow [2025-02-06 13:05:57,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 149 transitions, 976 flow, removed 28 selfloop flow, removed 4 redundant places. [2025-02-06 13:05:57,382 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 292 flow [2025-02-06 13:05:57,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=292, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2025-02-06 13:05:57,384 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2025-02-06 13:05:57,384 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 292 flow [2025-02-06 13:05:57,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.05) internal successors, (241), 20 states have internal predecessors, (241), 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 13:05:57,384 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:57,384 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:57,391 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 13:05:57,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 13:05:57,585 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:57,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1196600136, now seen corresponding path program 1 times [2025-02-06 13:05:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:57,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354104105] [2025-02-06 13:05:57,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:57,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:57,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:05:57,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:05:57,598 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:57,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:57,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:57,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354104105] [2025-02-06 13:05:57,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354104105] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:57,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740202433] [2025-02-06 13:05:57,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:57,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:57,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:57,666 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 13:05:57,668 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 13:05:57,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:05:57,723 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:05:57,723 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:57,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:57,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:05:57,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:57,796 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:05:57,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740202433] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:57,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:57,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:05:57,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108925407] [2025-02-06 13:05:57,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:57,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:05:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:57,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:05:57,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:05:57,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:05:57,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 292 flow. Second operand has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 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 13:05:57,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:57,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:05:57,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:58,122 INFO L124 PetriNetUnfolderBase]: 607/1075 cut-off events. [2025-02-06 13:05:58,122 INFO L125 PetriNetUnfolderBase]: For 2742/2760 co-relation queries the response was YES. [2025-02-06 13:05:58,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1075 events. 607/1075 cut-off events. For 2742/2760 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4778 event pairs, 380 based on Foata normal form. 13/1084 useless extension candidates. Maximal degree in co-relation 2725. Up to 727 conditions per place. [2025-02-06 13:05:58,128 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 66 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2025-02-06 13:05:58,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 638 flow [2025-02-06 13:05:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:05:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:05:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2025-02-06 13:05:58,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5321428571428571 [2025-02-06 13:05:58,129 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 292 flow. Second operand 8 states and 149 transitions. [2025-02-06 13:05:58,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 638 flow [2025-02-06 13:05:58,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 547 flow, removed 10 selfloop flow, removed 11 redundant places. [2025-02-06 13:05:58,133 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 296 flow [2025-02-06 13:05:58,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2025-02-06 13:05:58,134 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2025-02-06 13:05:58,134 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 296 flow [2025-02-06 13:05:58,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 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 13:05:58,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:58,134 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:58,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 13:05:58,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-06 13:05:58,335 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:58,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:58,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1943867041, now seen corresponding path program 2 times [2025-02-06 13:05:58,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:58,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452985178] [2025-02-06 13:05:58,336 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:58,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:58,342 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:05:58,349 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:05:58,349 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:05:58,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:58,514 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 13:05:58,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:58,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452985178] [2025-02-06 13:05:58,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452985178] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:58,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643690528] [2025-02-06 13:05:58,515 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:05:58,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:58,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:58,518 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 13:05:58,519 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 13:05:58,555 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:05:58,569 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:05:58,569 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:05:58,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:58,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:05:58,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:05:58,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:58,783 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 13:05:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:05:58,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643690528] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:58,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:58,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-02-06 13:05:58,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078619770] [2025-02-06 13:05:58,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:58,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:05:58,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:58,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:05:58,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:05:59,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:05:59,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 296 flow. Second operand has 20 states, 20 states have (on average 12.35) internal successors, (247), 20 states have internal predecessors, (247), 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 13:05:59,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:59,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:05:59,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:59,816 INFO L124 PetriNetUnfolderBase]: 782/1306 cut-off events. [2025-02-06 13:05:59,816 INFO L125 PetriNetUnfolderBase]: For 2056/2080 co-relation queries the response was YES. [2025-02-06 13:05:59,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4576 conditions, 1306 events. 782/1306 cut-off events. For 2056/2080 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5497 event pairs, 122 based on Foata normal form. 46/1350 useless extension candidates. Maximal degree in co-relation 3440. Up to 262 conditions per place. [2025-02-06 13:05:59,825 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 122 selfloop transitions, 18 changer transitions 0/144 dead transitions. [2025-02-06 13:05:59,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 144 transitions, 1062 flow [2025-02-06 13:05:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:05:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:05:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 247 transitions. [2025-02-06 13:05:59,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5040816326530613 [2025-02-06 13:05:59,826 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 296 flow. Second operand 14 states and 247 transitions. [2025-02-06 13:05:59,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 144 transitions, 1062 flow [2025-02-06 13:05:59,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 144 transitions, 1049 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 13:05:59,832 INFO L231 Difference]: Finished difference. Result has 74 places, 52 transitions, 345 flow [2025-02-06 13:05:59,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=345, PETRI_PLACES=74, PETRI_TRANSITIONS=52} [2025-02-06 13:05:59,834 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2025-02-06 13:05:59,835 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 52 transitions, 345 flow [2025-02-06 13:05:59,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.35) internal successors, (247), 20 states have internal predecessors, (247), 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 13:05:59,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:59,835 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:05:59,842 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 13:06:00,035 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,SelfDestructingSolverStorable11 [2025-02-06 13:06:00,036 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 13:06:00,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:00,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1853754359, now seen corresponding path program 1 times [2025-02-06 13:06:00,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:00,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968068032] [2025-02-06 13:06:00,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:00,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:00,041 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:06:00,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:00,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:00,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:00,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:00,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968068032] [2025-02-06 13:06:00,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968068032] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:00,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137519055] [2025-02-06 13:06:00,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:00,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:00,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:00,098 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 13:06:00,099 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 13:06:00,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:06:00,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:00,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:00,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:00,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:06:00,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:00,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:00,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137519055] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:00,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:00,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-02-06 13:06:00,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715672466] [2025-02-06 13:06:00,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:00,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:00,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:00,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:06:00,205 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:00,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 52 transitions, 345 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:00,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:00,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:00,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:00,322 INFO L124 PetriNetUnfolderBase]: 732/1241 cut-off events. [2025-02-06 13:06:00,322 INFO L125 PetriNetUnfolderBase]: For 2954/2978 co-relation queries the response was YES. [2025-02-06 13:06:00,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4651 conditions, 1241 events. 732/1241 cut-off events. For 2954/2978 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5311 event pairs, 171 based on Foata normal form. 42/1281 useless extension candidates. Maximal degree in co-relation 3593. Up to 774 conditions per place. [2025-02-06 13:06:00,329 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 55 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2025-02-06 13:06:00,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 565 flow [2025-02-06 13:06:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2025-02-06 13:06:00,331 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2025-02-06 13:06:00,331 INFO L175 Difference]: Start difference. First operand has 74 places, 52 transitions, 345 flow. Second operand 5 states and 87 transitions. [2025-02-06 13:06:00,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 565 flow [2025-02-06 13:06:00,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 521 flow, removed 8 selfloop flow, removed 11 redundant places. [2025-02-06 13:06:00,335 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 325 flow [2025-02-06 13:06:00,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2025-02-06 13:06:00,336 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2025-02-06 13:06:00,336 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 325 flow [2025-02-06 13:06:00,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:00,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:00,336 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:00,347 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 13:06:00,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:00,537 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 13:06:00,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:00,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1749166277, now seen corresponding path program 1 times [2025-02-06 13:06:00,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:00,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834531621] [2025-02-06 13:06:00,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:00,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:00,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:06:00,547 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:00,547 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:00,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:00,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834531621] [2025-02-06 13:06:00,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834531621] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:00,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168486240] [2025-02-06 13:06:00,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:00,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:00,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:00,583 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 13:06:00,585 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 13:06:00,620 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:06:00,632 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:00,632 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:00,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:00,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:06:00,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:00,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:00,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168486240] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:00,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:00,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-02-06 13:06:00,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440964862] [2025-02-06 13:06:00,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:00,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:00,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:00,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:00,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:06:00,684 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:00,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:00,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:00,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:00,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:00,794 INFO L124 PetriNetUnfolderBase]: 674/1178 cut-off events. [2025-02-06 13:06:00,794 INFO L125 PetriNetUnfolderBase]: For 3018/3032 co-relation queries the response was YES. [2025-02-06 13:06:00,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4305 conditions, 1178 events. 674/1178 cut-off events. For 3018/3032 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 5103 event pairs, 181 based on Foata normal form. 38/1189 useless extension candidates. Maximal degree in co-relation 3482. Up to 738 conditions per place. [2025-02-06 13:06:00,800 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 52 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2025-02-06 13:06:00,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 542 flow [2025-02-06 13:06:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2025-02-06 13:06:00,801 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2025-02-06 13:06:00,801 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 325 flow. Second operand 5 states and 88 transitions. [2025-02-06 13:06:00,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 542 flow [2025-02-06 13:06:00,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 67 transitions, 519 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:00,804 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 332 flow [2025-02-06 13:06:00,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2025-02-06 13:06:00,805 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 36 predicate places. [2025-02-06 13:06:00,805 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 332 flow [2025-02-06 13:06:00,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:00,805 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:00,805 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:00,811 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 13:06:01,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:01,009 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 13:06:01,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:01,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1651282932, now seen corresponding path program 1 times [2025-02-06 13:06:01,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:01,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335203666] [2025-02-06 13:06:01,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:01,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:01,015 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:06:01,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:06:01,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:01,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 13:06:01,029 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 13:06:01,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:06:01,044 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:06:01,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:01,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 13:06:01,078 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 13:06:01,078 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 13:06:01,079 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2025-02-06 13:06:01,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2025-02-06 13:06:01,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2025-02-06 13:06:01,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2025-02-06 13:06:01,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2025-02-06 13:06:01,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2025-02-06 13:06:01,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2025-02-06 13:06:01,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2025-02-06 13:06:01,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2025-02-06 13:06:01,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2025-02-06 13:06:01,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2025-02-06 13:06:01,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2025-02-06 13:06:01,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2025-02-06 13:06:01,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2025-02-06 13:06:01,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:06:01,082 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:01,121 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 13:06:01,121 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 13:06:01,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 01:06:01 BasicIcfg [2025-02-06 13:06:01,125 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 13:06:01,126 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 13:06:01,126 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 13:06:01,126 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 13:06:01,127 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:05:51" (3/4) ... [2025-02-06 13:06:01,128 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-02-06 13:06:01,129 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 13:06:01,130 INFO L158 Benchmark]: Toolchain (without parser) took 10155.53ms. Allocated memory was 167.8MB in the beginning and 369.1MB in the end (delta: 201.3MB). Free memory was 122.1MB in the beginning and 263.7MB in the end (delta: -141.6MB). Peak memory consumption was 61.0MB. Max. memory is 16.1GB. [2025-02-06 13:06:01,130 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 117.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 13:06:01,130 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.24ms. Allocated memory is still 167.8MB. Free memory was 122.1MB in the beginning and 110.7MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 13:06:01,130 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.65ms. Allocated memory is still 167.8MB. Free memory was 110.7MB in the beginning and 108.5MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 13:06:01,131 INFO L158 Benchmark]: Boogie Preprocessor took 46.02ms. Allocated memory is still 167.8MB. Free memory was 108.5MB in the beginning and 107.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 13:06:01,131 INFO L158 Benchmark]: IcfgBuilder took 502.31ms. Allocated memory is still 167.8MB. Free memory was 107.2MB in the beginning and 65.3MB in the end (delta: 41.8MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2025-02-06 13:06:01,131 INFO L158 Benchmark]: TraceAbstraction took 9369.24ms. Allocated memory was 167.8MB in the beginning and 369.1MB in the end (delta: 201.3MB). Free memory was 65.3MB in the beginning and 263.8MB in the end (delta: -198.4MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. [2025-02-06 13:06:01,131 INFO L158 Benchmark]: Witness Printer took 2.61ms. Allocated memory is still 369.1MB. Free memory was 263.8MB in the beginning and 263.7MB in the end (delta: 75.1kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 13:06:01,133 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 117.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.24ms. Allocated memory is still 167.8MB. Free memory was 122.1MB in the beginning and 110.7MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.65ms. Allocated memory is still 167.8MB. Free memory was 110.7MB in the beginning and 108.5MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.02ms. Allocated memory is still 167.8MB. Free memory was 108.5MB in the beginning and 107.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 502.31ms. Allocated memory is still 167.8MB. Free memory was 107.2MB in the beginning and 65.3MB in the end (delta: 41.8MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * TraceAbstraction took 9369.24ms. Allocated memory was 167.8MB in the beginning and 369.1MB in the end (delta: 201.3MB). Free memory was 65.3MB in the beginning and 263.8MB in the end (delta: -198.4MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. * Witness Printer took 2.61ms. Allocated memory is still 369.1MB. Free memory was 263.8MB in the beginning and 263.7MB in the end (delta: 75.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L39] 0 int* A; [L40] 0 _Atomic int counter; [L41] 0 int N; [L66] 0 pthread_t t1, t2; [L68] 0 N = __VERIFIER_nondet_int() [L69] CALL, EXPR 0 create_fresh_int_array(N) [L84] CALL 0 assume_abort_if_not(size >= 0) [L36] COND FALSE 0 !(!cond) [L84] RET 0 assume_abort_if_not(size >= 0) [L85] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L36] COND FALSE 0 !(!cond) [L85] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L87] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L88] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={-3:0}, counter=0, i=0, size=1] [L88] COND TRUE 0 i < size [L89] 0 arr[i] = __VERIFIER_nondet_int() [L88] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={-3:0}, counter=0, i=1, size=1] [L88] COND FALSE 0 !(i < size) [L91] 0 return arr; [L69] RET, EXPR 0 create_fresh_int_array(N) [L69] 0 A = create_fresh_int_array(N) [L72] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-3:0}, N=1, counter=0, t1=-5] [L73] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={-3:0}, N=1, counter=0, t1=-5, t2=-4] [L57] 2 int i=0; VAL [A={-3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L57] COND TRUE 2 i= b - 2147483648) [L36] COND FALSE 2 !(!cond) [L95] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L96] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L36] COND FALSE 2 !(!cond) [L96] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L97] 2 return a - b; [L58] RET, EXPR 2 minus(counter, A[i]) [L58] 2 int tmp = minus(counter, A[i]); [L48] 1 int i=0; VAL [A={-3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L48] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L36] COND FALSE 1 !(!cond) [L101] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L102] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L36] COND FALSE 1 !(!cond) [L102] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L103] 1 return a + b; [L49] RET, EXPR 1 plus(counter, A[i]) [L49] 1 int tmp = plus(counter, A[i]); [L50] 1 counter = tmp VAL [A={-3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=5, i=0, tmp=5] [L59] 2 counter = tmp VAL [A={-3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-5, i=0, tmp=-5] [L48] 1 i++ VAL [A={-3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-5, i=1] [L48] COND FALSE 1 !(i 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 -> 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 [2025-02-06 13:06:03,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:06:03,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:06:03,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:06:03,427 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:06:03,427 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:06:03,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-02-06 13:06:04,645 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/af22edd3f/63e22de9a13e4dd2a716a06e77b71ed7/FLAGb6421e0a1 [2025-02-06 13:06:04,811 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:06:04,811 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-02-06 13:06:04,817 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/af22edd3f/63e22de9a13e4dd2a716a06e77b71ed7/FLAGb6421e0a1 [2025-02-06 13:06:04,828 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/af22edd3f/63e22de9a13e4dd2a716a06e77b71ed7 [2025-02-06 13:06:04,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:06:04,832 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:06:04,833 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:06:04,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:06:04,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:06:04,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:06:04" (1/1) ... [2025-02-06 13:06:04,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33366d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:04, skipping insertion in model container [2025-02-06 13:06:04,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:06:04" (1/1) ... [2025-02-06 13:06:04,859 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:06:05,010 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 13:06:05,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:06:05,035 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:06:05,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:06:05,069 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:06:05,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05 WrapperNode [2025-02-06 13:06:05,071 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:06:05,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:06:05,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:06:05,072 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:06:05,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,110 INFO L138 Inliner]: procedures = 25, calls = 23, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 123 [2025-02-06 13:06:05,110 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:06:05,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:06:05,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:06:05,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:06:05,116 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,120 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,136 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 13:06:05,136 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,136 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,144 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,145 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:06:05,148 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:06:05,148 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:06:05,148 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:06:05,153 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (1/1) ... [2025-02-06 13:06:05,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:06:05,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:05,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:06:05,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:06:05,203 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:06:05,203 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:06:05,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-02-06 13:06:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-02-06 13:06:05,204 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:06:05,284 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:06:05,286 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:06:05,618 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:06:05,618 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:06:05,857 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:06:05,857 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:06:05,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:06:05 BoogieIcfgContainer [2025-02-06 13:06:05,858 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:06:05,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:06:05,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:06:05,863 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:06:05,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:06:04" (1/3) ... [2025-02-06 13:06:05,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41eeb859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:06:05, skipping insertion in model container [2025-02-06 13:06:05,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:05" (2/3) ... [2025-02-06 13:06:05,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41eeb859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:06:05, skipping insertion in model container [2025-02-06 13:06:05,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:06:05" (3/3) ... [2025-02-06 13:06:05,865 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2025-02-06 13:06:05,875 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:06:05,876 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-02-06 13:06:05,876 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:06:05,923 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:06:05,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2025-02-06 13:06:05,974 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2025-02-06 13:06:05,979 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:06:05,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 66 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2025-02-06 13:06:05,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2025-02-06 13:06:05,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2025-02-06 13:06:05,990 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:06:06,000 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;@126ff06b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:06:06,001 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-02-06 13:06:06,007 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:06:06,007 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:06:06,007 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:06:06,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:06,008 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:06:06,008 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 13:06:06,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:06,014 INFO L85 PathProgramCache]: Analyzing trace with hash 380436, now seen corresponding path program 1 times [2025-02-06 13:06:06,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:06,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239330914] [2025-02-06 13:06:06,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:06,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:06,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:06,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:06,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:06:06,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:06:06,091 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:06:06,092 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:06,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:06,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 13:06:06,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:06,132 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 7 [2025-02-06 13:06:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:06,152 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:06,153 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:06,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239330914] [2025-02-06 13:06:06,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239330914] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:06,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:06,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:06:06,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110460311] [2025-02-06 13:06:06,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:06,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:06:06,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:06,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:06:06,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:06:06,199 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:06,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 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 13:06:06,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:06,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:06,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:06,312 INFO L124 PetriNetUnfolderBase]: 92/179 cut-off events. [2025-02-06 13:06:06,313 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-06 13:06:06,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 179 events. 92/179 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 610 event pairs, 68 based on Foata normal form. 1/168 useless extension candidates. Maximal degree in co-relation 315. Up to 160 conditions per place. [2025-02-06 13:06:06,315 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 19 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2025-02-06 13:06:06,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 112 flow [2025-02-06 13:06:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:06:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:06:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2025-02-06 13:06:06,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-02-06 13:06:06,325 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 56 transitions. [2025-02-06 13:06:06,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 112 flow [2025-02-06 13:06:06,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:06,330 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2025-02-06 13:06:06,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, 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 13:06:06,338 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-02-06 13:06:06,338 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2025-02-06 13:06:06,338 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 13:06:06,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:06,338 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:06:06,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:06:06,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:06,539 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 13:06:06,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 380437, now seen corresponding path program 1 times [2025-02-06 13:06:06,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:06,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099294070] [2025-02-06 13:06:06,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:06,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:06,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:06,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:06,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:06:06,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:06:06,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:06:06,619 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:06,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:06,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:06:06,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:06,639 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 7 [2025-02-06 13:06:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:06,715 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:06,715 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:06,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099294070] [2025-02-06 13:06:06,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099294070] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:06,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:06,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:06,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612392711] [2025-02-06 13:06:06,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:06,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:06,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:06,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:06,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:06,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:06,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:06,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:06,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:06,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:06,933 INFO L124 PetriNetUnfolderBase]: 93/182 cut-off events. [2025-02-06 13:06:06,933 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:06:06,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 182 events. 93/182 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 628 event pairs, 68 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 338. Up to 165 conditions per place. [2025-02-06 13:06:06,935 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2025-02-06 13:06:06,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 124 flow [2025-02-06 13:06:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2025-02-06 13:06:06,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-06 13:06:06,942 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 70 transitions. [2025-02-06 13:06:06,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 124 flow [2025-02-06 13:06:06,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:06,943 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 89 flow [2025-02-06 13:06:06,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, 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=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2025-02-06 13:06:06,944 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-02-06 13:06:06,944 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 89 flow [2025-02-06 13:06:06,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:06,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:06,944 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:06:06,952 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 13:06:07,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:07,145 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 13:06:07,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:07,145 INFO L85 PathProgramCache]: Analyzing trace with hash 365612331, now seen corresponding path program 1 times [2025-02-06 13:06:07,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:07,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522272033] [2025-02-06 13:06:07,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:07,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:07,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:07,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:06:07,192 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:06:07,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:06:07,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:07,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:07,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:07,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:07,221 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 7 [2025-02-06 13:06:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:07,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:07,505 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522272033] [2025-02-06 13:06:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522272033] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:07,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:07,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2025-02-06 13:06:07,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70960986] [2025-02-06 13:06:07,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:07,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:06:07,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:07,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:06:07,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:06:07,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:07,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:07,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:07,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:07,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:08,038 INFO L124 PetriNetUnfolderBase]: 96/191 cut-off events. [2025-02-06 13:06:08,038 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:06:08,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 191 events. 96/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 685 event pairs, 68 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 345. Up to 168 conditions per place. [2025-02-06 13:06:08,040 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 13 changer transitions 0/41 dead transitions. [2025-02-06 13:06:08,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 193 flow [2025-02-06 13:06:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:06:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:06:08,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2025-02-06 13:06:08,043 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42 [2025-02-06 13:06:08,043 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 89 flow. Second operand 10 states and 147 transitions. [2025-02-06 13:06:08,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 193 flow [2025-02-06 13:06:08,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:08,045 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 166 flow [2025-02-06 13:06:08,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=166, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2025-02-06 13:06:08,047 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2025-02-06 13:06:08,047 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 166 flow [2025-02-06 13:06:08,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:08,048 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:08,048 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:06:08,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:08,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:08,249 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:08,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:08,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1548915947, now seen corresponding path program 1 times [2025-02-06 13:06:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:08,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978727668] [2025-02-06 13:06:08,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:08,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:08,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:08,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:08,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:06:08,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:06:08,300 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:06:08,300 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:08,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:08,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 13:06:08,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:08,309 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 7 [2025-02-06 13:06:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:08,344 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:08,344 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:08,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978727668] [2025-02-06 13:06:08,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978727668] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:08,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:08,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612590117] [2025-02-06 13:06:08,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:08,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:08,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:08,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:08,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:08,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2025-02-06 13:06:08,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:08,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:08,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2025-02-06 13:06:08,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:08,448 INFO L124 PetriNetUnfolderBase]: 96/186 cut-off events. [2025-02-06 13:06:08,448 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-02-06 13:06:08,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 186 events. 96/186 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 629 event pairs, 68 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 380. Up to 163 conditions per place. [2025-02-06 13:06:08,449 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 27 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2025-02-06 13:06:08,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 228 flow [2025-02-06 13:06:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-02-06 13:06:08,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2025-02-06 13:06:08,451 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 166 flow. Second operand 4 states and 59 transitions. [2025-02-06 13:06:08,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 228 flow [2025-02-06 13:06:08,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 198 flow, removed 11 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:08,452 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 144 flow [2025-02-06 13:06:08,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2025-02-06 13:06:08,453 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2025-02-06 13:06:08,453 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 144 flow [2025-02-06 13:06:08,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:08,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:08,453 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:06:08,461 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 13:06:08,654 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 [2025-02-06 13:06:08,654 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:08,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1548915946, now seen corresponding path program 1 times [2025-02-06 13:06:08,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:08,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689344895] [2025-02-06 13:06:08,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:08,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:08,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:08,659 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 13:06:08,660 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 13:06:08,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:06:08,707 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:06:08,707 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:08,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:08,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:08,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:08,755 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:08,755 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:08,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689344895] [2025-02-06 13:06:08,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689344895] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:08,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:08,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:06:08,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500754690] [2025-02-06 13:06:08,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:08,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:08,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:08,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:08,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:08,781 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:08,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:08,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:08,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:08,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:08,942 INFO L124 PetriNetUnfolderBase]: 157/310 cut-off events. [2025-02-06 13:06:08,942 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-06 13:06:08,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651 conditions, 310 events. 157/310 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1251 event pairs, 106 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 620. Up to 201 conditions per place. [2025-02-06 13:06:08,944 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-02-06 13:06:08,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 61 transitions, 305 flow [2025-02-06 13:06:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2025-02-06 13:06:08,945 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2025-02-06 13:06:08,945 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 144 flow. Second operand 5 states and 103 transitions. [2025-02-06 13:06:08,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 61 transitions, 305 flow [2025-02-06 13:06:08,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:08,947 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 162 flow [2025-02-06 13:06:08,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2025-02-06 13:06:08,948 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2025-02-06 13:06:08,948 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 162 flow [2025-02-06 13:06:08,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:08,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:08,948 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:08,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:09,153 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 [2025-02-06 13:06:09,153 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:09,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash -77722560, now seen corresponding path program 1 times [2025-02-06 13:06:09,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:09,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213291416] [2025-02-06 13:06:09,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:09,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:09,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:09,157 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 13:06:09,158 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 13:06:09,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:06:09,196 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:06:09,196 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:09,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:09,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:06:09,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:09,207 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 7 [2025-02-06 13:06:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:09,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:09,637 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:09,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213291416] [2025-02-06 13:06:09,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213291416] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:09,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:09,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2025-02-06 13:06:09,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359346486] [2025-02-06 13:06:09,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:09,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:06:09,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:09,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:06:09,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:06:09,954 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:09,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 162 flow. Second operand has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:09,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:09,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:09,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:10,859 INFO L124 PetriNetUnfolderBase]: 463/872 cut-off events. [2025-02-06 13:06:10,859 INFO L125 PetriNetUnfolderBase]: For 131/152 co-relation queries the response was YES. [2025-02-06 13:06:10,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 872 events. 463/872 cut-off events. For 131/152 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4405 event pairs, 197 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 1670. Up to 222 conditions per place. [2025-02-06 13:06:10,864 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 88 selfloop transitions, 23 changer transitions 0/115 dead transitions. [2025-02-06 13:06:10,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 115 transitions, 556 flow [2025-02-06 13:06:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 13:06:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 13:06:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 240 transitions. [2025-02-06 13:06:10,869 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5274725274725275 [2025-02-06 13:06:10,869 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 162 flow. Second operand 13 states and 240 transitions. [2025-02-06 13:06:10,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 115 transitions, 556 flow [2025-02-06 13:06:10,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 115 transitions, 551 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:10,875 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 254 flow [2025-02-06 13:06:10,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=254, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2025-02-06 13:06:10,875 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2025-02-06 13:06:10,875 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 254 flow [2025-02-06 13:06:10,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:10,875 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:10,875 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:10,882 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 13:06:11,076 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 [2025-02-06 13:06:11,076 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:11,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:11,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1815443852, now seen corresponding path program 1 times [2025-02-06 13:06:11,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:11,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460481309] [2025-02-06 13:06:11,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:11,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:11,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:11,079 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 13:06:11,080 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 13:06:11,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:06:11,125 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:06:11,125 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:11,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:11,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:11,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:11,184 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:11,184 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460481309] [2025-02-06 13:06:11,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460481309] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:11,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:11,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:06:11,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271136386] [2025-02-06 13:06:11,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:11,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:11,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:11,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:11,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:11,203 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:11,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:11,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:11,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:11,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:11,390 INFO L124 PetriNetUnfolderBase]: 453/893 cut-off events. [2025-02-06 13:06:11,390 INFO L125 PetriNetUnfolderBase]: For 621/652 co-relation queries the response was YES. [2025-02-06 13:06:11,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 893 events. 453/893 cut-off events. For 621/652 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4502 event pairs, 332 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 2178. Up to 733 conditions per place. [2025-02-06 13:06:11,395 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 55 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2025-02-06 13:06:11,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 413 flow [2025-02-06 13:06:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-02-06 13:06:11,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2025-02-06 13:06:11,397 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 254 flow. Second operand 5 states and 96 transitions. [2025-02-06 13:06:11,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 413 flow [2025-02-06 13:06:11,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 398 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:11,402 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 264 flow [2025-02-06 13:06:11,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2025-02-06 13:06:11,402 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2025-02-06 13:06:11,403 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 264 flow [2025-02-06 13:06:11,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:11,403 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:11,403 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:11,410 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 13:06:11,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:11,603 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:11,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:11,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1706919882, now seen corresponding path program 1 times [2025-02-06 13:06:11,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:11,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162308578] [2025-02-06 13:06:11,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:11,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:11,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:11,609 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 13:06:11,611 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 13:06:11,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:06:11,654 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:06:11,654 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:11,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:11,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:06:11,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:11,668 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 7 [2025-02-06 13:06:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:11,843 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:12,093 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162308578] [2025-02-06 13:06:12,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162308578] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:12,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:12,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2025-02-06 13:06:12,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048709030] [2025-02-06 13:06:12,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:12,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:06:12,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:12,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:06:12,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:06:12,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:12,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 264 flow. Second operand has 12 states, 12 states have (on average 11.5) internal successors, (138), 12 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:12,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:12,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:12,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:13,250 INFO L124 PetriNetUnfolderBase]: 585/1094 cut-off events. [2025-02-06 13:06:13,250 INFO L125 PetriNetUnfolderBase]: For 812/929 co-relation queries the response was YES. [2025-02-06 13:06:13,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2977 conditions, 1094 events. 585/1094 cut-off events. For 812/929 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5537 event pairs, 232 based on Foata normal form. 0/1052 useless extension candidates. Maximal degree in co-relation 2776. Up to 231 conditions per place. [2025-02-06 13:06:13,257 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 99 selfloop transitions, 23 changer transitions 0/126 dead transitions. [2025-02-06 13:06:13,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 126 transitions, 770 flow [2025-02-06 13:06:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 13:06:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 13:06:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2025-02-06 13:06:13,261 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5186813186813187 [2025-02-06 13:06:13,261 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 264 flow. Second operand 13 states and 236 transitions. [2025-02-06 13:06:13,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 126 transitions, 770 flow [2025-02-06 13:06:13,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 126 transitions, 765 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:13,266 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 356 flow [2025-02-06 13:06:13,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=356, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2025-02-06 13:06:13,268 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2025-02-06 13:06:13,268 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 356 flow [2025-02-06 13:06:13,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.5) internal successors, (138), 12 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:13,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:13,268 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-02-06 13:06:13,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 13:06:13,469 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 [2025-02-06 13:06:13,469 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:13,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash 4372845, now seen corresponding path program 2 times [2025-02-06 13:06:13,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:13,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297209463] [2025-02-06 13:06:13,470 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:13,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:13,472 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 13:06:13,473 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 13:06:13,507 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-06 13:06:13,521 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:06:13,521 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:13,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:13,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:06:13,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:13,529 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 7 [2025-02-06 13:06:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:13,698 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:14,151 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:14,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297209463] [2025-02-06 13:06:14,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297209463] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:14,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:14,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-02-06 13:06:14,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759431367] [2025-02-06 13:06:14,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:14,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:06:14,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:14,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:06:14,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:06:14,426 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:14,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 356 flow. Second operand has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:14,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:14,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:14,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:16,317 INFO L124 PetriNetUnfolderBase]: 527/1060 cut-off events. [2025-02-06 13:06:16,318 INFO L125 PetriNetUnfolderBase]: For 1135/1212 co-relation queries the response was YES. [2025-02-06 13:06:16,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3300 conditions, 1060 events. 527/1060 cut-off events. For 1135/1212 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5656 event pairs, 372 based on Foata normal form. 6/1065 useless extension candidates. Maximal degree in co-relation 2993. Up to 877 conditions per place. [2025-02-06 13:06:16,323 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 47 selfloop transitions, 31 changer transitions 0/83 dead transitions. [2025-02-06 13:06:16,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 650 flow [2025-02-06 13:06:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-06 13:06:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-02-06 13:06:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 300 transitions. [2025-02-06 13:06:16,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2025-02-06 13:06:16,325 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 356 flow. Second operand 22 states and 300 transitions. [2025-02-06 13:06:16,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 650 flow [2025-02-06 13:06:16,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 83 transitions, 618 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-02-06 13:06:16,329 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 554 flow [2025-02-06 13:06:16,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=554, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2025-02-06 13:06:16,330 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2025-02-06 13:06:16,330 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 554 flow [2025-02-06 13:06:16,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:16,330 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:16,330 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:16,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 13:06:16,530 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 [2025-02-06 13:06:16,531 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:16,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash -910568603, now seen corresponding path program 1 times [2025-02-06 13:06:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:16,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123385562] [2025-02-06 13:06:16,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:16,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:16,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:16,533 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 13:06:16,534 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 13:06:16,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:06:16,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:06:16,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:16,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:16,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:06:16,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:16,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:16,734 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:16,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123385562] [2025-02-06 13:06:16,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123385562] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:16,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:16,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2025-02-06 13:06:16,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765224969] [2025-02-06 13:06:16,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:16,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:06:16,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:16,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:06:16,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:06:16,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:16,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 554 flow. Second operand has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:16,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:16,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:16,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:17,135 INFO L124 PetriNetUnfolderBase]: 542/1025 cut-off events. [2025-02-06 13:06:17,136 INFO L125 PetriNetUnfolderBase]: For 1049/1121 co-relation queries the response was YES. [2025-02-06 13:06:17,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3276 conditions, 1025 events. 542/1025 cut-off events. For 1049/1121 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5119 event pairs, 270 based on Foata normal form. 18/1043 useless extension candidates. Maximal degree in co-relation 3211. Up to 525 conditions per place. [2025-02-06 13:06:17,141 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 83 selfloop transitions, 29 changer transitions 0/117 dead transitions. [2025-02-06 13:06:17,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 117 transitions, 916 flow [2025-02-06 13:06:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:06:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:06:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2025-02-06 13:06:17,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-02-06 13:06:17,142 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 554 flow. Second operand 8 states and 152 transitions. [2025-02-06 13:06:17,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 117 transitions, 916 flow [2025-02-06 13:06:17,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 117 transitions, 836 flow, removed 27 selfloop flow, removed 9 redundant places. [2025-02-06 13:06:17,149 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 538 flow [2025-02-06 13:06:17,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=538, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2025-02-06 13:06:17,151 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2025-02-06 13:06:17,151 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 538 flow [2025-02-06 13:06:17,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:17,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:17,151 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:17,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 13:06:17,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:17,355 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:17,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1207899739, now seen corresponding path program 1 times [2025-02-06 13:06:17,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:17,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856295311] [2025-02-06 13:06:17,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:17,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:17,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:17,357 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 13:06:17,358 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 13:06:17,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:06:17,406 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:06:17,406 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:17,406 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:17,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:06:17,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:17,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:17,577 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:17,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856295311] [2025-02-06 13:06:17,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856295311] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:17,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:17,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2025-02-06 13:06:17,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901087343] [2025-02-06 13:06:17,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:17,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:06:17,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:17,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:06:17,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:06:17,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:17,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 538 flow. Second operand has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:17,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:17,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:17,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:17,969 INFO L124 PetriNetUnfolderBase]: 479/898 cut-off events. [2025-02-06 13:06:17,970 INFO L125 PetriNetUnfolderBase]: For 1326/1424 co-relation queries the response was YES. [2025-02-06 13:06:17,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3065 conditions, 898 events. 479/898 cut-off events. For 1326/1424 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4152 event pairs, 262 based on Foata normal form. 13/911 useless extension candidates. Maximal degree in co-relation 3001. Up to 519 conditions per place. [2025-02-06 13:06:17,975 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 75 selfloop transitions, 29 changer transitions 0/109 dead transitions. [2025-02-06 13:06:17,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 880 flow [2025-02-06 13:06:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:06:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:06:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2025-02-06 13:06:17,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2025-02-06 13:06:17,976 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 538 flow. Second operand 8 states and 150 transitions. [2025-02-06 13:06:17,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 880 flow [2025-02-06 13:06:17,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 109 transitions, 843 flow, removed 9 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:17,981 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 585 flow [2025-02-06 13:06:17,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=585, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2025-02-06 13:06:17,981 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 61 predicate places. [2025-02-06 13:06:17,981 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 585 flow [2025-02-06 13:06:17,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:17,982 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:17,982 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:17,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:18,182 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 [2025-02-06 13:06:18,183 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:18,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:18,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1424100123, now seen corresponding path program 1 times [2025-02-06 13:06:18,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:18,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069725804] [2025-02-06 13:06:18,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:18,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:18,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:18,185 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 13:06:18,186 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 13:06:18,217 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:06:18,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:06:18,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:18,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:18,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-06 13:06:18,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:18,244 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:18,244 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:18,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069725804] [2025-02-06 13:06:18,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069725804] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:18,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:18,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:18,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014201104] [2025-02-06 13:06:18,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:18,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:06:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:18,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:06:18,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:06:18,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-02-06 13:06:18,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 585 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:18,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:18,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-02-06 13:06:18,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:18,388 INFO L124 PetriNetUnfolderBase]: 504/1029 cut-off events. [2025-02-06 13:06:18,389 INFO L125 PetriNetUnfolderBase]: For 1731/1877 co-relation queries the response was YES. [2025-02-06 13:06:18,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 1029 events. 504/1029 cut-off events. For 1731/1877 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5443 event pairs, 156 based on Foata normal form. 4/1032 useless extension candidates. Maximal degree in co-relation 3444. Up to 560 conditions per place. [2025-02-06 13:06:18,393 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 91 selfloop transitions, 3 changer transitions 6/106 dead transitions. [2025-02-06 13:06:18,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 106 transitions, 912 flow [2025-02-06 13:06:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:06:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:06:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2025-02-06 13:06:18,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2025-02-06 13:06:18,394 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 585 flow. Second operand 3 states and 71 transitions. [2025-02-06 13:06:18,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 106 transitions, 912 flow [2025-02-06 13:06:18,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 106 transitions, 855 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-06 13:06:18,399 INFO L231 Difference]: Finished difference. Result has 95 places, 78 transitions, 508 flow [2025-02-06 13:06:18,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=508, PETRI_PLACES=95, PETRI_TRANSITIONS=78} [2025-02-06 13:06:18,400 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2025-02-06 13:06:18,400 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 508 flow [2025-02-06 13:06:18,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:18,400 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:18,400 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:18,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 13:06:18,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:18,601 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:18,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1424793790, now seen corresponding path program 2 times [2025-02-06 13:06:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:18,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334009283] [2025-02-06 13:06:18,601 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:18,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:18,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:18,603 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 13:06:18,604 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 13:06:18,636 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-06 13:06:18,642 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 14 statements. [2025-02-06 13:06:18,642 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:06:18,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:18,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 13:06:18,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:18,653 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 7 [2025-02-06 13:06:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-06 13:06:18,786 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:18,787 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:18,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334009283] [2025-02-06 13:06:18,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334009283] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:18,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:18,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:06:18,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108000128] [2025-02-06 13:06:18,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:18,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:18,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:18,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:18,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:18,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:18,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 78 transitions, 508 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 13:06:18,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:18,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:18,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:19,175 INFO L124 PetriNetUnfolderBase]: 756/1380 cut-off events. [2025-02-06 13:06:19,175 INFO L125 PetriNetUnfolderBase]: For 2484/2667 co-relation queries the response was YES. [2025-02-06 13:06:19,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4859 conditions, 1380 events. 756/1380 cut-off events. For 2484/2667 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7165 event pairs, 287 based on Foata normal form. 46/1423 useless extension candidates. Maximal degree in co-relation 4802. Up to 732 conditions per place. [2025-02-06 13:06:19,184 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 94 selfloop transitions, 25 changer transitions 0/123 dead transitions. [2025-02-06 13:06:19,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 123 transitions, 977 flow [2025-02-06 13:06:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:06:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:06:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2025-02-06 13:06:19,185 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5095238095238095 [2025-02-06 13:06:19,185 INFO L175 Difference]: Start difference. First operand has 95 places, 78 transitions, 508 flow. Second operand 6 states and 107 transitions. [2025-02-06 13:06:19,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 123 transitions, 977 flow [2025-02-06 13:06:19,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 123 transitions, 896 flow, removed 21 selfloop flow, removed 8 redundant places. [2025-02-06 13:06:19,193 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 584 flow [2025-02-06 13:06:19,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=584, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2025-02-06 13:06:19,194 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 54 predicate places. [2025-02-06 13:06:19,194 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 584 flow [2025-02-06 13:06:19,194 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 13:06:19,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:19,194 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:19,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 13:06:19,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:19,395 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:19,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:19,395 INFO L85 PathProgramCache]: Analyzing trace with hash 376663311, now seen corresponding path program 2 times [2025-02-06 13:06:19,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:19,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568566694] [2025-02-06 13:06:19,395 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:19,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:19,397 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 13:06:19,398 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 13:06:19,430 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-06 13:06:19,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:06:19,446 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:19,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:19,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:06:19,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:19,457 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 7 [2025-02-06 13:06:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:19,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:20,083 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:20,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568566694] [2025-02-06 13:06:20,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568566694] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:20,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:20,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2025-02-06 13:06:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430188213] [2025-02-06 13:06:20,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:20,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 13:06:20,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:20,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 13:06:20,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:06:20,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:20,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 584 flow. Second operand has 16 states, 16 states have (on average 11.5) internal successors, (184), 16 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:20,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:20,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:20,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:22,332 INFO L124 PetriNetUnfolderBase]: 1294/2460 cut-off events. [2025-02-06 13:06:22,332 INFO L125 PetriNetUnfolderBase]: For 5118/5434 co-relation queries the response was YES. [2025-02-06 13:06:22,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8775 conditions, 2460 events. 1294/2460 cut-off events. For 5118/5434 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 15022 event pairs, 420 based on Foata normal form. 56/2494 useless extension candidates. Maximal degree in co-relation 8720. Up to 551 conditions per place. [2025-02-06 13:06:22,347 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 178 selfloop transitions, 49 changer transitions 0/232 dead transitions. [2025-02-06 13:06:22,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 232 transitions, 1769 flow [2025-02-06 13:06:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 13:06:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 13:06:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 337 transitions. [2025-02-06 13:06:22,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5067669172932331 [2025-02-06 13:06:22,349 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 584 flow. Second operand 19 states and 337 transitions. [2025-02-06 13:06:22,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 232 transitions, 1769 flow [2025-02-06 13:06:22,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 232 transitions, 1726 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:22,362 INFO L231 Difference]: Finished difference. Result has 110 places, 103 transitions, 813 flow [2025-02-06 13:06:22,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=813, PETRI_PLACES=110, PETRI_TRANSITIONS=103} [2025-02-06 13:06:22,362 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 74 predicate places. [2025-02-06 13:06:22,362 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 103 transitions, 813 flow [2025-02-06 13:06:22,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.5) internal successors, (184), 16 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:22,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:22,363 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:22,369 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 13:06:22,563 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 [2025-02-06 13:06:22,563 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:22,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1287187845, now seen corresponding path program 2 times [2025-02-06 13:06:22,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:22,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750058081] [2025-02-06 13:06:22,564 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:22,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:22,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:22,566 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 13:06:22,568 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 13:06:22,602 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:06:22,617 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:06:22,617 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:22,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:22,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:06:22,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:22,628 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 7 [2025-02-06 13:06:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:22,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:23,087 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:23,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750058081] [2025-02-06 13:06:23,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750058081] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:23,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:23,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-02-06 13:06:23,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947739839] [2025-02-06 13:06:23,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:23,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:06:23,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:23,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:06:23,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:06:23,445 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:23,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 103 transitions, 813 flow. Second operand has 14 states, 14 states have (on average 12.0) internal successors, (168), 14 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:23,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:23,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:23,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:24,612 INFO L124 PetriNetUnfolderBase]: 2259/4110 cut-off events. [2025-02-06 13:06:24,612 INFO L125 PetriNetUnfolderBase]: For 13212/13473 co-relation queries the response was YES. [2025-02-06 13:06:24,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15882 conditions, 4110 events. 2259/4110 cut-off events. For 13212/13473 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 24832 event pairs, 635 based on Foata normal form. 142/4216 useless extension candidates. Maximal degree in co-relation 15819. Up to 1355 conditions per place. [2025-02-06 13:06:24,637 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 197 selfloop transitions, 32 changer transitions 0/234 dead transitions. [2025-02-06 13:06:24,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 234 transitions, 2321 flow [2025-02-06 13:06:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:06:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:06:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2025-02-06 13:06:24,639 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5012987012987012 [2025-02-06 13:06:24,639 INFO L175 Difference]: Start difference. First operand has 110 places, 103 transitions, 813 flow. Second operand 11 states and 193 transitions. [2025-02-06 13:06:24,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 234 transitions, 2321 flow [2025-02-06 13:06:24,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 234 transitions, 2231 flow, removed 36 selfloop flow, removed 7 redundant places. [2025-02-06 13:06:24,665 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 952 flow [2025-02-06 13:06:24,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=952, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2025-02-06 13:06:24,666 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 80 predicate places. [2025-02-06 13:06:24,666 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 952 flow [2025-02-06 13:06:24,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.0) internal successors, (168), 14 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:24,666 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:24,666 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-02-06 13:06:24,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:24,867 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 [2025-02-06 13:06:24,867 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:24,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:24,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1501285196, now seen corresponding path program 3 times [2025-02-06 13:06:24,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:24,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442804317] [2025-02-06 13:06:24,868 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:24,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:24,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:24,869 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 13:06:24,870 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 13:06:24,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-02-06 13:06:24,932 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:06:24,932 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:06:24,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:24,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 13:06:24,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:25,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:25,264 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:25,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442804317] [2025-02-06 13:06:25,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442804317] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:25,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:25,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-02-06 13:06:25,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600076592] [2025-02-06 13:06:25,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:25,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 13:06:25,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:25,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 13:06:25,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2025-02-06 13:06:25,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:25,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 952 flow. Second operand has 18 states, 18 states have (on average 12.88888888888889) internal successors, (232), 18 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:25,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:25,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:25,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:26,433 INFO L124 PetriNetUnfolderBase]: 2246/4023 cut-off events. [2025-02-06 13:06:26,434 INFO L125 PetriNetUnfolderBase]: For 14855/15026 co-relation queries the response was YES. [2025-02-06 13:06:26,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16977 conditions, 4023 events. 2246/4023 cut-off events. For 14855/15026 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 23365 event pairs, 1224 based on Foata normal form. 84/4104 useless extension candidates. Maximal degree in co-relation 16912. Up to 2613 conditions per place. [2025-02-06 13:06:26,461 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 178 selfloop transitions, 31 changer transitions 0/214 dead transitions. [2025-02-06 13:06:26,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 214 transitions, 1983 flow [2025-02-06 13:06:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:06:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:06:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 268 transitions. [2025-02-06 13:06:26,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5469387755102041 [2025-02-06 13:06:26,462 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 952 flow. Second operand 14 states and 268 transitions. [2025-02-06 13:06:26,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 214 transitions, 1983 flow [2025-02-06 13:06:26,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 214 transitions, 1957 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:26,536 INFO L231 Difference]: Finished difference. Result has 125 places, 110 transitions, 982 flow [2025-02-06 13:06:26,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=982, PETRI_PLACES=125, PETRI_TRANSITIONS=110} [2025-02-06 13:06:26,537 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 89 predicate places. [2025-02-06 13:06:26,537 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 110 transitions, 982 flow [2025-02-06 13:06:26,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.88888888888889) internal successors, (232), 18 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:26,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:26,538 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:26,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 13:06:26,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:26,738 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:26,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1150045226, now seen corresponding path program 3 times [2025-02-06 13:06:26,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:26,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196049014] [2025-02-06 13:06:26,739 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:26,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:26,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:26,741 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 13:06:26,742 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 13:06:26,778 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-02-06 13:06:26,800 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:26,800 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:06:26,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:26,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 13:06:26,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:26,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:27,106 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196049014] [2025-02-06 13:06:27,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196049014] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:27,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:27,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-02-06 13:06:27,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964439281] [2025-02-06 13:06:27,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:27,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 13:06:27,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:27,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 13:06:27,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2025-02-06 13:06:27,292 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:27,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 110 transitions, 982 flow. Second operand has 18 states, 18 states have (on average 13.11111111111111) internal successors, (236), 18 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:27,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:27,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:27,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:28,227 INFO L124 PetriNetUnfolderBase]: 2162/3917 cut-off events. [2025-02-06 13:06:28,227 INFO L125 PetriNetUnfolderBase]: For 15045/15311 co-relation queries the response was YES. [2025-02-06 13:06:28,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16657 conditions, 3917 events. 2162/3917 cut-off events. For 15045/15311 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 22748 event pairs, 1291 based on Foata normal form. 77/3981 useless extension candidates. Maximal degree in co-relation 16590. Up to 2708 conditions per place. [2025-02-06 13:06:28,253 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 153 selfloop transitions, 31 changer transitions 0/190 dead transitions. [2025-02-06 13:06:28,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 190 transitions, 1853 flow [2025-02-06 13:06:28,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:06:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:06:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 263 transitions. [2025-02-06 13:06:28,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.536734693877551 [2025-02-06 13:06:28,255 INFO L175 Difference]: Start difference. First operand has 125 places, 110 transitions, 982 flow. Second operand 14 states and 263 transitions. [2025-02-06 13:06:28,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 190 transitions, 1853 flow [2025-02-06 13:06:28,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 190 transitions, 1692 flow, removed 24 selfloop flow, removed 13 redundant places. [2025-02-06 13:06:28,317 INFO L231 Difference]: Finished difference. Result has 129 places, 114 transitions, 1013 flow [2025-02-06 13:06:28,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1013, PETRI_PLACES=129, PETRI_TRANSITIONS=114} [2025-02-06 13:06:28,318 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 93 predicate places. [2025-02-06 13:06:28,318 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 114 transitions, 1013 flow [2025-02-06 13:06:28,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.11111111111111) internal successors, (236), 18 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:28,319 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:28,319 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:28,326 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 13:06:28,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:28,520 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 13:06:28,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 840476138, now seen corresponding path program 1 times [2025-02-06 13:06:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534517333] [2025-02-06 13:06:28,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:28,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:28,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:28,524 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 13:06:28,525 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 13:06:28,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:06:28,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:28,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:28,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:28,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:28,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:28,609 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:28,609 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:28,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534517333] [2025-02-06 13:06:28,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534517333] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:28,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:28,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:28,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800393308] [2025-02-06 13:06:28,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:28,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:28,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:28,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:28,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:28,624 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:28,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 114 transitions, 1013 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:28,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:28,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:28,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:29,056 INFO L124 PetriNetUnfolderBase]: 2154/3981 cut-off events. [2025-02-06 13:06:29,056 INFO L125 PetriNetUnfolderBase]: For 15751/15984 co-relation queries the response was YES. [2025-02-06 13:06:29,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17263 conditions, 3981 events. 2154/3981 cut-off events. For 15751/15984 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 24213 event pairs, 882 based on Foata normal form. 24/3979 useless extension candidates. Maximal degree in co-relation 17192. Up to 2016 conditions per place. [2025-02-06 13:06:29,079 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 150 selfloop transitions, 15 changer transitions 13/184 dead transitions. [2025-02-06 13:06:29,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 184 transitions, 1913 flow [2025-02-06 13:06:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:06:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:06:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2025-02-06 13:06:29,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-02-06 13:06:29,080 INFO L175 Difference]: Start difference. First operand has 129 places, 114 transitions, 1013 flow. Second operand 6 states and 117 transitions. [2025-02-06 13:06:29,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 184 transitions, 1913 flow [2025-02-06 13:06:29,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 184 transitions, 1826 flow, removed 8 selfloop flow, removed 9 redundant places. [2025-02-06 13:06:29,117 INFO L231 Difference]: Finished difference. Result has 127 places, 114 transitions, 1000 flow [2025-02-06 13:06:29,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1000, PETRI_PLACES=127, PETRI_TRANSITIONS=114} [2025-02-06 13:06:29,118 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 91 predicate places. [2025-02-06 13:06:29,118 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 114 transitions, 1000 flow [2025-02-06 13:06:29,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:29,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:29,118 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:29,125 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 13:06:29,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:29,319 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 13:06:29,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1619195586, now seen corresponding path program 2 times [2025-02-06 13:06:29,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:29,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864841824] [2025-02-06 13:06:29,323 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:29,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:29,325 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 13:06:29,325 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 13:06:29,359 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:06:29,373 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:29,373 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:29,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:29,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:29,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:29,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:29,459 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:29,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864841824] [2025-02-06 13:06:29,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864841824] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:29,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:06:29,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-06 13:06:29,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641680984] [2025-02-06 13:06:29,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:29,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:29,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:29,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:29,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:06:29,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:29,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 114 transitions, 1000 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:29,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:29,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:29,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:29,951 INFO L124 PetriNetUnfolderBase]: 2724/4824 cut-off events. [2025-02-06 13:06:29,951 INFO L125 PetriNetUnfolderBase]: For 20745/20755 co-relation queries the response was YES. [2025-02-06 13:06:29,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21469 conditions, 4824 events. 2724/4824 cut-off events. For 20745/20755 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 28236 event pairs, 242 based on Foata normal form. 82/4906 useless extension candidates. Maximal degree in co-relation 21398. Up to 2252 conditions per place. [2025-02-06 13:06:29,979 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 169 selfloop transitions, 54 changer transitions 4/231 dead transitions. [2025-02-06 13:06:29,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 231 transitions, 2447 flow [2025-02-06 13:06:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:06:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:06:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2025-02-06 13:06:29,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5224489795918368 [2025-02-06 13:06:29,981 INFO L175 Difference]: Start difference. First operand has 127 places, 114 transitions, 1000 flow. Second operand 7 states and 128 transitions. [2025-02-06 13:06:29,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 231 transitions, 2447 flow [2025-02-06 13:06:30,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 231 transitions, 2353 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:30,033 INFO L231 Difference]: Finished difference. Result has 132 places, 152 transitions, 1502 flow [2025-02-06 13:06:30,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1502, PETRI_PLACES=132, PETRI_TRANSITIONS=152} [2025-02-06 13:06:30,034 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 96 predicate places. [2025-02-06 13:06:30,034 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 152 transitions, 1502 flow [2025-02-06 13:06:30,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:30,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:30,034 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2025-02-06 13:06:30,042 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 13:06:30,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:30,235 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:30,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:30,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2127193822, now seen corresponding path program 4 times [2025-02-06 13:06:30,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:30,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863481329] [2025-02-06 13:06:30,236 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:30,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:30,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:30,238 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 13:06:30,239 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 13:06:30,278 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:06:30,306 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:30,306 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:30,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:30,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:06:30,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:30,317 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 7 [2025-02-06 13:06:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:30,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:31,706 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:31,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863481329] [2025-02-06 13:06:31,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863481329] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:31,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:31,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2025-02-06 13:06:31,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894278617] [2025-02-06 13:06:31,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:31,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 13:06:31,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:31,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 13:06:31,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-02-06 13:06:32,933 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:32,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 152 transitions, 1502 flow. Second operand has 21 states, 21 states have (on average 11.619047619047619) internal successors, (244), 21 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:32,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:32,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:32,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:37,355 INFO L124 PetriNetUnfolderBase]: 3894/7203 cut-off events. [2025-02-06 13:06:37,355 INFO L125 PetriNetUnfolderBase]: For 46322/46810 co-relation queries the response was YES. [2025-02-06 13:06:37,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34980 conditions, 7203 events. 3894/7203 cut-off events. For 46322/46810 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 46714 event pairs, 877 based on Foata normal form. 147/7332 useless extension candidates. Maximal degree in co-relation 34906. Up to 1515 conditions per place. [2025-02-06 13:06:37,404 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 348 selfloop transitions, 108 changer transitions 0/469 dead transitions. [2025-02-06 13:06:37,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 469 transitions, 5208 flow [2025-02-06 13:06:37,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-06 13:06:37,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-06 13:06:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 483 transitions. [2025-02-06 13:06:37,406 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2025-02-06 13:06:37,406 INFO L175 Difference]: Start difference. First operand has 132 places, 152 transitions, 1502 flow. Second operand 26 states and 483 transitions. [2025-02-06 13:06:37,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 469 transitions, 5208 flow [2025-02-06 13:06:37,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 469 transitions, 5134 flow, removed 37 selfloop flow, removed 0 redundant places. [2025-02-06 13:06:37,532 INFO L231 Difference]: Finished difference. Result has 166 places, 197 transitions, 2392 flow [2025-02-06 13:06:37,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2392, PETRI_PLACES=166, PETRI_TRANSITIONS=197} [2025-02-06 13:06:37,533 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 130 predicate places. [2025-02-06 13:06:37,533 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 197 transitions, 2392 flow [2025-02-06 13:06:37,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.619047619047619) internal successors, (244), 21 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:37,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:37,534 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:37,541 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 13:06:37,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:37,734 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 13:06:37,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2144344766, now seen corresponding path program 1 times [2025-02-06 13:06:37,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:37,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804810658] [2025-02-06 13:06:37,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:37,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:37,737 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 13:06:37,738 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 13:06:37,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:06:37,789 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:37,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:37,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:37,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:37,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:37,838 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:37,868 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:37,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804810658] [2025-02-06 13:06:37,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804810658] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:37,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:06:37,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-06 13:06:37,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422565406] [2025-02-06 13:06:37,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:37,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:37,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:37,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:37,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:06:37,888 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:37,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 197 transitions, 2392 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:37,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:37,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:37,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:38,866 INFO L124 PetriNetUnfolderBase]: 5097/8682 cut-off events. [2025-02-06 13:06:38,866 INFO L125 PetriNetUnfolderBase]: For 62165/62317 co-relation queries the response was YES. [2025-02-06 13:06:38,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44975 conditions, 8682 events. 5097/8682 cut-off events. For 62165/62317 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 51840 event pairs, 563 based on Foata normal form. 139/8821 useless extension candidates. Maximal degree in co-relation 44889. Up to 4191 conditions per place. [2025-02-06 13:06:38,931 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 270 selfloop transitions, 79 changer transitions 0/354 dead transitions. [2025-02-06 13:06:38,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 354 transitions, 4881 flow [2025-02-06 13:06:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:06:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:06:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2025-02-06 13:06:38,933 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2025-02-06 13:06:38,933 INFO L175 Difference]: Start difference. First operand has 166 places, 197 transitions, 2392 flow. Second operand 7 states and 131 transitions. [2025-02-06 13:06:38,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 354 transitions, 4881 flow [2025-02-06 13:06:39,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 354 transitions, 4749 flow, removed 55 selfloop flow, removed 8 redundant places. [2025-02-06 13:06:39,217 INFO L231 Difference]: Finished difference. Result has 168 places, 240 transitions, 3088 flow [2025-02-06 13:06:39,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3088, PETRI_PLACES=168, PETRI_TRANSITIONS=240} [2025-02-06 13:06:39,218 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 132 predicate places. [2025-02-06 13:06:39,218 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 240 transitions, 3088 flow [2025-02-06 13:06:39,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:39,223 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:39,223 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:39,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-06 13:06:39,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:39,423 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 13:06:39,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash -895767944, now seen corresponding path program 3 times [2025-02-06 13:06:39,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:39,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226523661] [2025-02-06 13:06:39,424 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:39,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:39,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:39,426 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:39,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-06 13:06:39,464 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:06:39,480 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:39,480 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:39,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:39,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:39,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:39,522 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:39,522 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:39,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226523661] [2025-02-06 13:06:39,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226523661] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:39,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:39,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:39,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510354270] [2025-02-06 13:06:39,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:39,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:39,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:39,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:39,542 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:39,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 240 transitions, 3088 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:39,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:39,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:39,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:40,666 INFO L124 PetriNetUnfolderBase]: 5055/8895 cut-off events. [2025-02-06 13:06:40,666 INFO L125 PetriNetUnfolderBase]: For 76644/76795 co-relation queries the response was YES. [2025-02-06 13:06:40,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48688 conditions, 8895 events. 5055/8895 cut-off events. For 76644/76795 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 55708 event pairs, 1879 based on Foata normal form. 18/8912 useless extension candidates. Maximal degree in co-relation 48599. Up to 5385 conditions per place. [2025-02-06 13:06:40,741 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 270 selfloop transitions, 77 changer transitions 13/377 dead transitions. [2025-02-06 13:06:40,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 377 transitions, 5576 flow [2025-02-06 13:06:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:06:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:06:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2025-02-06 13:06:40,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-02-06 13:06:40,742 INFO L175 Difference]: Start difference. First operand has 168 places, 240 transitions, 3088 flow. Second operand 6 states and 117 transitions. [2025-02-06 13:06:40,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 377 transitions, 5576 flow [2025-02-06 13:06:41,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 377 transitions, 5558 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-02-06 13:06:41,054 INFO L231 Difference]: Finished difference. Result has 176 places, 285 transitions, 4096 flow [2025-02-06 13:06:41,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4096, PETRI_PLACES=176, PETRI_TRANSITIONS=285} [2025-02-06 13:06:41,054 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 140 predicate places. [2025-02-06 13:06:41,054 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 285 transitions, 4096 flow [2025-02-06 13:06:41,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:41,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:41,055 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:41,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-06 13:06:41,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:41,255 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 13:06:41,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:41,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1103095070, now seen corresponding path program 2 times [2025-02-06 13:06:41,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:41,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522250973] [2025-02-06 13:06:41,256 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:41,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:41,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:41,258 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:41,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-06 13:06:41,296 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:06:41,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-02-06 13:06:41,306 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:06:41,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:41,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:41,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:41,342 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:41,342 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:41,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522250973] [2025-02-06 13:06:41,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522250973] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:41,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:41,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:41,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246175875] [2025-02-06 13:06:41,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:41,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:41,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:41,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:41,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:41,363 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:41,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 285 transitions, 4096 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:41,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:41,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:41,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:42,454 INFO L124 PetriNetUnfolderBase]: 4711/8443 cut-off events. [2025-02-06 13:06:42,454 INFO L125 PetriNetUnfolderBase]: For 80727/81011 co-relation queries the response was YES. [2025-02-06 13:06:42,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48308 conditions, 8443 events. 4711/8443 cut-off events. For 80727/81011 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 53718 event pairs, 1825 based on Foata normal form. 10/8450 useless extension candidates. Maximal degree in co-relation 48214. Up to 5219 conditions per place. [2025-02-06 13:06:42,530 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 239 selfloop transitions, 105 changer transitions 13/371 dead transitions. [2025-02-06 13:06:42,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 371 transitions, 5872 flow [2025-02-06 13:06:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:06:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:06:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2025-02-06 13:06:42,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-02-06 13:06:42,535 INFO L175 Difference]: Start difference. First operand has 176 places, 285 transitions, 4096 flow. Second operand 6 states and 117 transitions. [2025-02-06 13:06:42,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 371 transitions, 5872 flow [2025-02-06 13:06:42,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 371 transitions, 5795 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:42,762 INFO L231 Difference]: Finished difference. Result has 181 places, 309 transitions, 4800 flow [2025-02-06 13:06:42,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4800, PETRI_PLACES=181, PETRI_TRANSITIONS=309} [2025-02-06 13:06:42,762 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 145 predicate places. [2025-02-06 13:06:42,763 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 309 transitions, 4800 flow [2025-02-06 13:06:42,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:42,763 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:42,763 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:42,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:42,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:42,963 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 13:06:42,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash 801146498, now seen corresponding path program 3 times [2025-02-06 13:06:42,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:42,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259907995] [2025-02-06 13:06:42,964 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:42,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:42,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:42,966 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:42,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-06 13:06:43,006 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:06:43,022 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:43,022 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:43,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:43,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:43,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:43,060 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:43,060 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:43,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259907995] [2025-02-06 13:06:43,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259907995] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:43,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:43,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:43,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934633716] [2025-02-06 13:06:43,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:43,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:43,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:43,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:43,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:43,077 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:43,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 309 transitions, 4800 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:43,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:43,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:43,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:44,325 INFO L124 PetriNetUnfolderBase]: 4669/8427 cut-off events. [2025-02-06 13:06:44,325 INFO L125 PetriNetUnfolderBase]: For 91345/91571 co-relation queries the response was YES. [2025-02-06 13:06:44,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48698 conditions, 8427 events. 4669/8427 cut-off events. For 91345/91571 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 54081 event pairs, 1593 based on Foata normal form. 10/8433 useless extension candidates. Maximal degree in co-relation 48602. Up to 4674 conditions per place. [2025-02-06 13:06:44,417 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 336 selfloop transitions, 61 changer transitions 6/417 dead transitions. [2025-02-06 13:06:44,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 417 transitions, 6943 flow [2025-02-06 13:06:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:06:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:06:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-02-06 13:06:44,418 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-02-06 13:06:44,418 INFO L175 Difference]: Start difference. First operand has 181 places, 309 transitions, 4800 flow. Second operand 6 states and 112 transitions. [2025-02-06 13:06:44,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 417 transitions, 6943 flow [2025-02-06 13:06:44,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 417 transitions, 6763 flow, removed 30 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:44,700 INFO L231 Difference]: Finished difference. Result has 184 places, 309 transitions, 4780 flow [2025-02-06 13:06:44,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4780, PETRI_PLACES=184, PETRI_TRANSITIONS=309} [2025-02-06 13:06:44,701 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 148 predicate places. [2025-02-06 13:06:44,701 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 309 transitions, 4780 flow [2025-02-06 13:06:44,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:44,701 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:44,701 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:44,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-06 13:06:44,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:44,901 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 13:06:44,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:44,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1779520076, now seen corresponding path program 4 times [2025-02-06 13:06:44,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:44,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529962177] [2025-02-06 13:06:44,902 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:44,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:44,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:44,904 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:44,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-06 13:06:44,940 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:06:44,947 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-02-06 13:06:44,947 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:06:44,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:44,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 13:06:44,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:44,966 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:44,967 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:44,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529962177] [2025-02-06 13:06:44,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529962177] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:44,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:44,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:44,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819548473] [2025-02-06 13:06:44,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:44,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:44,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:44,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:44,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:44,982 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:44,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 309 transitions, 4780 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:44,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:44,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:44,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:46,286 INFO L124 PetriNetUnfolderBase]: 4766/8592 cut-off events. [2025-02-06 13:06:46,286 INFO L125 PetriNetUnfolderBase]: For 98758/98846 co-relation queries the response was YES. [2025-02-06 13:06:46,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50468 conditions, 8592 events. 4766/8592 cut-off events. For 98758/98846 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 55189 event pairs, 1746 based on Foata normal form. 15/8581 useless extension candidates. Maximal degree in co-relation 50372. Up to 5133 conditions per place. [2025-02-06 13:06:46,356 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 238 selfloop transitions, 102 changer transitions 8/365 dead transitions. [2025-02-06 13:06:46,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 365 transitions, 5965 flow [2025-02-06 13:06:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2025-02-06 13:06:46,357 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6114285714285714 [2025-02-06 13:06:46,357 INFO L175 Difference]: Start difference. First operand has 184 places, 309 transitions, 4780 flow. Second operand 5 states and 107 transitions. [2025-02-06 13:06:46,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 365 transitions, 5965 flow [2025-02-06 13:06:46,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 365 transitions, 5846 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:46,606 INFO L231 Difference]: Finished difference. Result has 184 places, 307 transitions, 4834 flow [2025-02-06 13:06:46,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4834, PETRI_PLACES=184, PETRI_TRANSITIONS=307} [2025-02-06 13:06:46,607 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 148 predicate places. [2025-02-06 13:06:46,607 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 307 transitions, 4834 flow [2025-02-06 13:06:46,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:46,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:46,607 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:46,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-02-06 13:06:46,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:46,808 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 13:06:46,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:46,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1381339094, now seen corresponding path program 4 times [2025-02-06 13:06:46,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:46,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746005782] [2025-02-06 13:06:46,808 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:46,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:46,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:46,810 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:46,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-06 13:06:46,845 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:06:46,851 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-02-06 13:06:46,851 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:06:46,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:46,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 13:06:46,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:46,874 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:46,874 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:46,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746005782] [2025-02-06 13:06:46,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746005782] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:46,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:46,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:46,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938185718] [2025-02-06 13:06:46,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:46,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:46,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:46,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:46,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:46,889 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:46,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 307 transitions, 4834 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:46,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:46,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:46,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:48,267 INFO L124 PetriNetUnfolderBase]: 6122/10351 cut-off events. [2025-02-06 13:06:48,267 INFO L125 PetriNetUnfolderBase]: For 117151/117232 co-relation queries the response was YES. [2025-02-06 13:06:48,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60534 conditions, 10351 events. 6122/10351 cut-off events. For 117151/117232 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 63435 event pairs, 1887 based on Foata normal form. 149/10500 useless extension candidates. Maximal degree in co-relation 60439. Up to 6111 conditions per place. [2025-02-06 13:06:48,362 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 310 selfloop transitions, 99 changer transitions 0/414 dead transitions. [2025-02-06 13:06:48,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 414 transitions, 6731 flow [2025-02-06 13:06:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:06:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:06:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2025-02-06 13:06:48,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-02-06 13:06:48,363 INFO L175 Difference]: Start difference. First operand has 184 places, 307 transitions, 4834 flow. Second operand 6 states and 126 transitions. [2025-02-06 13:06:48,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 414 transitions, 6731 flow [2025-02-06 13:06:48,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 414 transitions, 6605 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:48,684 INFO L231 Difference]: Finished difference. Result has 186 places, 304 transitions, 4873 flow [2025-02-06 13:06:48,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4409, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4873, PETRI_PLACES=186, PETRI_TRANSITIONS=304} [2025-02-06 13:06:48,685 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 150 predicate places. [2025-02-06 13:06:48,685 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 304 transitions, 4873 flow [2025-02-06 13:06:48,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:48,685 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:48,685 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:48,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:48,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:48,886 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 13:06:48,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash -374344146, now seen corresponding path program 5 times [2025-02-06 13:06:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:48,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153913894] [2025-02-06 13:06:48,886 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:48,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:48,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:48,888 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:48,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-06 13:06:48,923 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:06:48,937 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:48,937 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:48,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:48,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:48,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:48,972 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:48,972 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:48,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153913894] [2025-02-06 13:06:48,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153913894] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:48,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:48,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:48,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046647321] [2025-02-06 13:06:48,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:48,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:48,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:48,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:48,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:48,987 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:06:48,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 304 transitions, 4873 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:48,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:48,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:06:48,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:50,131 INFO L124 PetriNetUnfolderBase]: 5245/9292 cut-off events. [2025-02-06 13:06:50,131 INFO L125 PetriNetUnfolderBase]: For 108680/109324 co-relation queries the response was YES. [2025-02-06 13:06:50,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54790 conditions, 9292 events. 5245/9292 cut-off events. For 108680/109324 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 60141 event pairs, 1934 based on Foata normal form. 10/9296 useless extension candidates. Maximal degree in co-relation 54694. Up to 5102 conditions per place. [2025-02-06 13:06:50,317 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 275 selfloop transitions, 93 changer transitions 3/387 dead transitions. [2025-02-06 13:06:50,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 387 transitions, 6526 flow [2025-02-06 13:06:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:06:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:06:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2025-02-06 13:06:50,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2025-02-06 13:06:50,318 INFO L175 Difference]: Start difference. First operand has 186 places, 304 transitions, 4873 flow. Second operand 6 states and 115 transitions. [2025-02-06 13:06:50,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 387 transitions, 6526 flow [2025-02-06 13:06:50,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 387 transitions, 6330 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:50,647 INFO L231 Difference]: Finished difference. Result has 189 places, 306 transitions, 4923 flow [2025-02-06 13:06:50,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4687, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4923, PETRI_PLACES=189, PETRI_TRANSITIONS=306} [2025-02-06 13:06:50,648 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 153 predicate places. [2025-02-06 13:06:50,648 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 306 transitions, 4923 flow [2025-02-06 13:06:50,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:50,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:50,648 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:50,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-06 13:06:50,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:50,849 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 13:06:50,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1180790462, now seen corresponding path program 6 times [2025-02-06 13:06:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:50,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801635187] [2025-02-06 13:06:50,849 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:06:50,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:50,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:50,851 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:50,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-02-06 13:06:50,888 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:06:50,901 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:50,901 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 13:06:50,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:50,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:50,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:50,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:50,980 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:50,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801635187] [2025-02-06 13:06:50,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801635187] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:50,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:06:50,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-06 13:06:50,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582213224] [2025-02-06 13:06:50,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:50,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:50,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:50,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:50,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:06:50,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:50,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 306 transitions, 4923 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:50,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:50,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:50,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:52,620 INFO L124 PetriNetUnfolderBase]: 5883/9995 cut-off events. [2025-02-06 13:06:52,620 INFO L125 PetriNetUnfolderBase]: For 117631/117689 co-relation queries the response was YES. [2025-02-06 13:06:52,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58529 conditions, 9995 events. 5883/9995 cut-off events. For 117631/117689 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 60891 event pairs, 1388 based on Foata normal form. 139/10134 useless extension candidates. Maximal degree in co-relation 58431. Up to 6131 conditions per place. [2025-02-06 13:06:52,745 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 305 selfloop transitions, 83 changer transitions 3/396 dead transitions. [2025-02-06 13:06:52,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 396 transitions, 6754 flow [2025-02-06 13:06:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-02-06 13:06:52,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2025-02-06 13:06:52,746 INFO L175 Difference]: Start difference. First operand has 189 places, 306 transitions, 4923 flow. Second operand 5 states and 96 transitions. [2025-02-06 13:06:52,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 396 transitions, 6754 flow [2025-02-06 13:06:53,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 396 transitions, 6613 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:53,174 INFO L231 Difference]: Finished difference. Result has 189 places, 295 transitions, 4736 flow [2025-02-06 13:06:53,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4577, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4736, PETRI_PLACES=189, PETRI_TRANSITIONS=295} [2025-02-06 13:06:53,175 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 153 predicate places. [2025-02-06 13:06:53,175 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 295 transitions, 4736 flow [2025-02-06 13:06:53,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:53,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:53,175 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:53,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-02-06 13:06:53,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:53,375 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 13:06:53,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:53,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2079513918, now seen corresponding path program 5 times [2025-02-06 13:06:53,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:53,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176283019] [2025-02-06 13:06:53,376 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:53,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:53,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:53,378 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:53,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-02-06 13:06:53,414 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:06:53,427 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:06:53,427 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:53,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:53,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:53,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:53,464 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:53,464 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:53,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176283019] [2025-02-06 13:06:53,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176283019] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:53,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:53,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:53,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761493143] [2025-02-06 13:06:53,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:53,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:53,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:53,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:53,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:53,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:53,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 295 transitions, 4736 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 13:06:53,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:53,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:54,861 INFO L124 PetriNetUnfolderBase]: 6297/10558 cut-off events. [2025-02-06 13:06:54,862 INFO L125 PetriNetUnfolderBase]: For 123035/123107 co-relation queries the response was YES. [2025-02-06 13:06:54,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63416 conditions, 10558 events. 6297/10558 cut-off events. For 123035/123107 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 63912 event pairs, 2251 based on Foata normal form. 10/10568 useless extension candidates. Maximal degree in co-relation 63319. Up to 5455 conditions per place. [2025-02-06 13:06:54,967 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 314 selfloop transitions, 86 changer transitions 0/405 dead transitions. [2025-02-06 13:06:54,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 405 transitions, 6727 flow [2025-02-06 13:06:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:06:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:06:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2025-02-06 13:06:54,968 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2025-02-06 13:06:54,968 INFO L175 Difference]: Start difference. First operand has 189 places, 295 transitions, 4736 flow. Second operand 7 states and 131 transitions. [2025-02-06 13:06:54,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 405 transitions, 6727 flow [2025-02-06 13:06:55,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 405 transitions, 6338 flow, removed 24 selfloop flow, removed 8 redundant places. [2025-02-06 13:06:55,356 INFO L231 Difference]: Finished difference. Result has 186 places, 299 transitions, 4693 flow [2025-02-06 13:06:55,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4693, PETRI_PLACES=186, PETRI_TRANSITIONS=299} [2025-02-06 13:06:55,357 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 150 predicate places. [2025-02-06 13:06:55,357 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 299 transitions, 4693 flow [2025-02-06 13:06:55,357 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 13:06:55,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:55,357 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:55,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-02-06 13:06:55,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:55,558 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:55,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash 604937172, now seen corresponding path program 4 times [2025-02-06 13:06:55,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:06:55,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129883656] [2025-02-06 13:06:55,558 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:55,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:55,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:55,560 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:55,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-02-06 13:06:55,597 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:55,625 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:55,625 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:55,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:55,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:06:55,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:55,641 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 7 [2025-02-06 13:06:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:55,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:56,910 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:06:56,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129883656] [2025-02-06 13:06:56,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129883656] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:56,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:56,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2025-02-06 13:06:56,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341794866] [2025-02-06 13:06:56,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:56,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 13:06:56,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:06:56,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 13:06:56,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-02-06 13:06:58,043 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:06:58,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 299 transitions, 4693 flow. Second operand has 21 states, 21 states have (on average 11.80952380952381) internal successors, (248), 21 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:58,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:58,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:06:58,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:02,819 INFO L124 PetriNetUnfolderBase]: 6576/11644 cut-off events. [2025-02-06 13:07:02,820 INFO L125 PetriNetUnfolderBase]: For 131621/132971 co-relation queries the response was YES. [2025-02-06 13:07:02,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65935 conditions, 11644 events. 6576/11644 cut-off events. For 131621/132971 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 76060 event pairs, 963 based on Foata normal form. 260/11777 useless extension candidates. Maximal degree in co-relation 65840. Up to 2685 conditions per place. [2025-02-06 13:07:02,939 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 538 selfloop transitions, 136 changer transitions 0/705 dead transitions. [2025-02-06 13:07:02,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 705 transitions, 11280 flow [2025-02-06 13:07:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-06 13:07:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-06 13:07:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 467 transitions. [2025-02-06 13:07:02,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5131868131868131 [2025-02-06 13:07:02,941 INFO L175 Difference]: Start difference. First operand has 186 places, 299 transitions, 4693 flow. Second operand 26 states and 467 transitions. [2025-02-06 13:07:02,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 705 transitions, 11280 flow [2025-02-06 13:07:03,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 705 transitions, 10980 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-02-06 13:07:03,250 INFO L231 Difference]: Finished difference. Result has 214 places, 353 transitions, 5623 flow [2025-02-06 13:07:03,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5623, PETRI_PLACES=214, PETRI_TRANSITIONS=353} [2025-02-06 13:07:03,250 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 178 predicate places. [2025-02-06 13:07:03,250 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 353 transitions, 5623 flow [2025-02-06 13:07:03,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.80952380952381) internal successors, (248), 21 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:03,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:03,251 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:03,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-02-06 13:07:03,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:03,451 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:07:03,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1869186377, now seen corresponding path program 5 times [2025-02-06 13:07:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:07:03,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436164514] [2025-02-06 13:07:03,452 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:07:03,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:03,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:03,454 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:07:03,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-02-06 13:07:03,492 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 7 equivalence classes. [2025-02-06 13:07:03,559 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:07:03,559 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-06 13:07:03,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:03,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:07:03,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:03,568 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 7 [2025-02-06 13:07:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-06 13:07:03,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-06 13:07:04,081 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:07:04,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436164514] [2025-02-06 13:07:04,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436164514] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:04,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:07:04,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-02-06 13:07:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755096385] [2025-02-06 13:07:04,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:04,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:07:04,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:07:04,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:07:04,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:07:04,413 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-02-06 13:07:04,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 353 transitions, 5623 flow. Second operand has 14 states, 14 states have (on average 11.857142857142858) internal successors, (166), 14 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:04,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:04,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-02-06 13:07:04,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:06,601 INFO L124 PetriNetUnfolderBase]: 6776/11884 cut-off events. [2025-02-06 13:07:06,602 INFO L125 PetriNetUnfolderBase]: For 161682/163271 co-relation queries the response was YES. [2025-02-06 13:07:06,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72171 conditions, 11884 events. 6776/11884 cut-off events. For 161682/163271 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 77911 event pairs, 1444 based on Foata normal form. 82/11866 useless extension candidates. Maximal degree in co-relation 72066. Up to 3362 conditions per place. [2025-02-06 13:07:06,725 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 353 selfloop transitions, 136 changer transitions 0/520 dead transitions. [2025-02-06 13:07:06,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 520 transitions, 8771 flow [2025-02-06 13:07:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:07:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:07:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2025-02-06 13:07:06,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2025-02-06 13:07:06,727 INFO L175 Difference]: Start difference. First operand has 214 places, 353 transitions, 5623 flow. Second operand 11 states and 195 transitions. [2025-02-06 13:07:06,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 520 transitions, 8771 flow [2025-02-06 13:07:07,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 520 transitions, 8528 flow, removed 93 selfloop flow, removed 11 redundant places. [2025-02-06 13:07:07,181 INFO L231 Difference]: Finished difference. Result has 215 places, 358 transitions, 5978 flow [2025-02-06 13:07:07,181 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5490, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5978, PETRI_PLACES=215, PETRI_TRANSITIONS=358} [2025-02-06 13:07:07,182 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 179 predicate places. [2025-02-06 13:07:07,182 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 358 transitions, 5978 flow [2025-02-06 13:07:07,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.857142857142858) internal successors, (166), 14 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:07,182 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:07,183 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2025-02-06 13:07:07,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-02-06 13:07:07,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:07,383 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:07:07,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:07,384 INFO L85 PathProgramCache]: Analyzing trace with hash 254969201, now seen corresponding path program 3 times [2025-02-06 13:07:07,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:07:07,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990834650] [2025-02-06 13:07:07,384 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:07:07,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:07,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:07,385 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:07:07,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-02-06 13:07:07,425 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 11 equivalence classes. [2025-02-06 13:07:07,680 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:07:07,680 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-02-06 13:07:07,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:07,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 13:07:07,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:07,694 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 7 [2025-02-06 13:07:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:07:08,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:07:09,552 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:07:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990834650] [2025-02-06 13:07:09,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990834650] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:09,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:07:09,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2025-02-06 13:07:09,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118785897] [2025-02-06 13:07:09,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:09,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 13:07:09,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:07:09,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 13:07:09,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2025-02-06 13:07:10,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-02-06 13:07:10,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 358 transitions, 5978 flow. Second operand has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 26 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:10,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:10,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-02-06 13:07:10,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:24,642 INFO L124 PetriNetUnfolderBase]: 6488/11722 cut-off events. [2025-02-06 13:07:24,642 INFO L125 PetriNetUnfolderBase]: For 161852/162484 co-relation queries the response was YES. [2025-02-06 13:07:24,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72485 conditions, 11722 events. 6488/11722 cut-off events. For 161852/162484 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 78320 event pairs, 3638 based on Foata normal form. 18/11619 useless extension candidates. Maximal degree in co-relation 72103. Up to 9419 conditions per place. [2025-02-06 13:07:24,751 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 295 selfloop transitions, 66 changer transitions 0/394 dead transitions. [2025-02-06 13:07:24,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 394 transitions, 7192 flow [2025-02-06 13:07:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-02-06 13:07:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-02-06 13:07:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 605 transitions. [2025-02-06 13:07:24,753 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37577639751552794 [2025-02-06 13:07:24,753 INFO L175 Difference]: Start difference. First operand has 215 places, 358 transitions, 5978 flow. Second operand 46 states and 605 transitions. [2025-02-06 13:07:24,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 394 transitions, 7192 flow [2025-02-06 13:07:25,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 394 transitions, 7147 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-02-06 13:07:25,124 INFO L231 Difference]: Finished difference. Result has 268 places, 394 transitions, 6611 flow [2025-02-06 13:07:25,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=6611, PETRI_PLACES=268, PETRI_TRANSITIONS=394} [2025-02-06 13:07:25,125 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 232 predicate places. [2025-02-06 13:07:25,125 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 394 transitions, 6611 flow [2025-02-06 13:07:25,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 26 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:25,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:25,125 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:25,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-02-06 13:07:25,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:25,326 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 13:07:25,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1049329049, now seen corresponding path program 1 times [2025-02-06 13:07:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:07:25,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170892391] [2025-02-06 13:07:25,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:07:25,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:25,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:25,328 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:07:25,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-02-06 13:07:25,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:07:25,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:07:25,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:25,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 13:07:25,387 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 13:07:25,398 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:07:25,410 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:07:25,411 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:25,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 13:07:25,441 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-02-06 13:07:25,442 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 13:07:25,443 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2025-02-06 13:07:25,445 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2025-02-06 13:07:25,445 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2025-02-06 13:07:25,446 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2025-02-06 13:07:25,446 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2025-02-06 13:07:25,446 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2025-02-06 13:07:25,446 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2025-02-06 13:07:25,446 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2025-02-06 13:07:25,446 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2025-02-06 13:07:25,446 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2025-02-06 13:07:25,446 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2025-02-06 13:07:25,446 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2025-02-06 13:07:25,446 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2025-02-06 13:07:25,447 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2025-02-06 13:07:25,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-02-06 13:07:25,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:25,651 INFO L422 BasicCegarLoop]: Path program histogram: [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:25,677 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 13:07:25,677 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 13:07:25,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 01:07:25 BasicIcfg [2025-02-06 13:07:25,680 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 13:07:25,681 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 13:07:25,681 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 13:07:25,681 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 13:07:25,681 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:06:05" (3/4) ... [2025-02-06 13:07:25,682 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-02-06 13:07:25,683 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 13:07:25,684 INFO L158 Benchmark]: Toolchain (without parser) took 80851.62ms. Allocated memory was 117.4MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 92.8MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2025-02-06 13:07:25,684 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 13:07:25,684 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.69ms. Allocated memory is still 117.4MB. Free memory was 92.8MB in the beginning and 80.3MB in the end (delta: 12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 13:07:25,685 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.45ms. Allocated memory is still 117.4MB. Free memory was 80.3MB in the beginning and 78.7MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 13:07:25,685 INFO L158 Benchmark]: Boogie Preprocessor took 37.41ms. Allocated memory is still 117.4MB. Free memory was 78.7MB in the beginning and 76.8MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 13:07:25,685 INFO L158 Benchmark]: IcfgBuilder took 709.43ms. Allocated memory is still 117.4MB. Free memory was 76.8MB in the beginning and 78.8MB in the end (delta: -2.0MB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. [2025-02-06 13:07:25,685 INFO L158 Benchmark]: TraceAbstraction took 79820.92ms. Allocated memory was 117.4MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 78.1MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2025-02-06 13:07:25,685 INFO L158 Benchmark]: Witness Printer took 2.31ms. Allocated memory is still 2.5GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 231.0kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 13:07:25,686 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.69ms. Allocated memory is still 117.4MB. Free memory was 92.8MB in the beginning and 80.3MB in the end (delta: 12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.45ms. Allocated memory is still 117.4MB. Free memory was 80.3MB in the beginning and 78.7MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.41ms. Allocated memory is still 117.4MB. Free memory was 78.7MB in the beginning and 76.8MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 709.43ms. Allocated memory is still 117.4MB. Free memory was 76.8MB in the beginning and 78.8MB in the end (delta: -2.0MB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. * TraceAbstraction took 79820.92ms. Allocated memory was 117.4MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 78.1MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Witness Printer took 2.31ms. Allocated memory is still 2.5GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 231.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L39] 0 int* A; [L40] 0 _Atomic int counter; [L41] 0 int N; [L66] 0 pthread_t t1, t2; [L68] 0 N = __VERIFIER_nondet_int() [L69] CALL, EXPR 0 create_fresh_int_array(N) [L84] CALL 0 assume_abort_if_not(size >= 0) [L36] COND FALSE 0 !(!cond) [L84] RET 0 assume_abort_if_not(size >= 0) [L85] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L36] COND FALSE 0 !(!cond) [L85] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L87] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L88] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={2048:0}, counter=0, i=0, size=1] [L88] COND TRUE 0 i < size [L89] 0 arr[i] = __VERIFIER_nondet_int() [L88] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={2048:0}, counter=0, i=1, size=1] [L88] COND FALSE 0 !(i < size) [L91] 0 return arr; [L69] RET, EXPR 0 create_fresh_int_array(N) [L69] 0 A = create_fresh_int_array(N) [L72] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={2048:0}, N=1, counter=0, t1=-1] [L48] 1 int i=0; VAL [A={2048:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L48] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L36] COND FALSE 1 !(!cond) [L101] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L102] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L36] COND FALSE 1 !(!cond) [L102] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L103] 1 return a + b; [L49] RET, EXPR 1 plus(counter, A[i]) [L49] 1 int tmp = plus(counter, A[i]); [L73] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={2048:0}, N=1, counter=0, t1=-1, t2=0] [L57] 2 int i=0; VAL [A={2048:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L57] COND TRUE 2 i= b - 2147483648) [L36] COND FALSE 2 !(!cond) [L95] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L96] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L36] COND FALSE 2 !(!cond) [L96] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L97] 2 return a - b; [L58] RET, EXPR 2 minus(counter, A[i]) [L58] 2 int tmp = minus(counter, A[i]); [L50] 1 counter = tmp VAL [A={2048:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=1, i=0, tmp=1] [L48] 1 i++ VAL [A={2048:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=1, i=1] [L48] COND FALSE 1 !(i