./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:00:59,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:00:59,744 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:00:59,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:00:59,748 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:00:59,769 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:00:59,770 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:00:59,771 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:00:59,771 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:00:59,771 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:00:59,772 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:00:59,772 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:00:59,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:00:59,772 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:00:59,772 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:00:59,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:00:59,773 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:00:59,774 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:00:59,774 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:00:59,774 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:00:59,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:00:59,774 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:00:59,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:00:59,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:00:59,774 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:00:59,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:00:59,775 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:00:59,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:00:59,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:00:59,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:00:59,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:00:59,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:00:59,775 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 -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2025-02-06 13:01:00,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:01:00,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:01:00,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:01:00,020 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:01:00,021 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:01:00,022 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2025-02-06 13:01:01,248 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/86a13c765/a4122464f87f4606a8398116bf0acd2b/FLAG3dae53bad [2025-02-06 13:01:01,477 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:01:01,478 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2025-02-06 13:01:01,483 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/86a13c765/a4122464f87f4606a8398116bf0acd2b/FLAG3dae53bad [2025-02-06 13:01:01,493 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/86a13c765/a4122464f87f4606a8398116bf0acd2b [2025-02-06 13:01:01,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:01:01,496 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:01:01,497 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:01:01,497 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:01:01,500 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:01:01,500 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,501 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22da2d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01, skipping insertion in model container [2025-02-06 13:01:01,501 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,511 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:01:01,621 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 13:01:01,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:01:01,634 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:01:01,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:01:01,667 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:01:01,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01 WrapperNode [2025-02-06 13:01:01,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:01:01,669 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:01:01,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:01:01,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:01:01,674 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,698 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 183 [2025-02-06 13:01:01,698 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:01:01,699 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:01:01,699 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:01:01,699 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:01:01,706 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,712 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,723 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-06 13:01:01,723 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,723 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,728 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,729 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,730 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,730 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,732 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:01:01,732 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:01:01,732 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:01:01,732 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:01:01,733 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (1/1) ... [2025-02-06 13:01:01,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:01:01,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:01,757 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 13:01:01,759 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 13:01:01,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:01:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:01:01,775 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:01:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:01:01,775 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:01:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:01:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:01:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:01:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:01:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:01:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:01:01,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:01:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:01:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:01:01,776 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 13:01:01,853 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:01:01,854 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:01:02,148 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:01:02,148 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:01:02,359 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:01:02,359 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:01:02,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:01:02 BoogieIcfgContainer [2025-02-06 13:01:02,360 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:01:02,374 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:01:02,374 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:01:02,378 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:01:02,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:01:01" (1/3) ... [2025-02-06 13:01:02,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e57097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:01:02, skipping insertion in model container [2025-02-06 13:01:02,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:01:01" (2/3) ... [2025-02-06 13:01:02,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e57097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:01:02, skipping insertion in model container [2025-02-06 13:01:02,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:01:02" (3/3) ... [2025-02-06 13:01:02,382 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2025-02-06 13:01:02,395 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:01:02,396 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-array-int-symm.wvr.c that has 3 procedures, 55 locations, 1 initial locations, 4 loop locations, and 22 error locations. [2025-02-06 13:01:02,397 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:01:02,452 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:01:02,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 60 transitions, 134 flow [2025-02-06 13:01:02,511 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2025-02-06 13:01:02,515 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:01:02,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 58 events. 6/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2025-02-06 13:01:02,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 60 transitions, 134 flow [2025-02-06 13:01:02,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 126 flow [2025-02-06 13:01:02,530 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:01:02,537 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;@1e005fcd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:01:02,538 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2025-02-06 13:01:02,540 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:01:02,540 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:01:02,540 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:01:02,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:02,541 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:01:02,541 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:02,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:02,545 INFO L85 PathProgramCache]: Analyzing trace with hash 564242, now seen corresponding path program 1 times [2025-02-06 13:01:02,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:02,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688888859] [2025-02-06 13:01:02,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:02,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:02,599 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:01:02,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:01:02,619 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:02,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:02,711 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 13:01:02,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:02,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688888859] [2025-02-06 13:01:02,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688888859] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:02,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:02,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:01:02,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112289968] [2025-02-06 13:01:02,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:02,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:01:02,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:02,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:01:02,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:01:02,767 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-02-06 13:01:02,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 13:01:02,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:02,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-02-06 13:01:02,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:02,855 INFO L124 PetriNetUnfolderBase]: 105/252 cut-off events. [2025-02-06 13:01:02,855 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-02-06 13:01:02,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 252 events. 105/252 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1143 event pairs, 58 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 386. Up to 166 conditions per place. [2025-02-06 13:01:02,858 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 22 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2025-02-06 13:01:02,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 166 flow [2025-02-06 13:01:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:01:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:01:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2025-02-06 13:01:02,867 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2025-02-06 13:01:02,868 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 3 states and 123 transitions. [2025-02-06 13:01:02,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 166 flow [2025-02-06 13:01:02,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:01:02,873 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 114 flow [2025-02-06 13:01:02,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2025-02-06 13:01:02,877 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2025-02-06 13:01:02,877 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 114 flow [2025-02-06 13:01:02,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 13:01:02,878 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:02,878 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:01:02,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:01:02,878 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:02,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:02,879 INFO L85 PathProgramCache]: Analyzing trace with hash 564243, now seen corresponding path program 1 times [2025-02-06 13:01:02,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:02,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985448884] [2025-02-06 13:01:02,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:02,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:02,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:01:02,906 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:01:02,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:02,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:03,124 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 13:01:03,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:03,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985448884] [2025-02-06 13:01:03,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985448884] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:03,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:03,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:01:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99637780] [2025-02-06 13:01:03,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:03,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:01:03,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:03,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:01:03,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:01:03,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-02-06 13:01:03,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 13:01:03,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:03,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-02-06 13:01:03,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:03,300 INFO L124 PetriNetUnfolderBase]: 106/255 cut-off events. [2025-02-06 13:01:03,300 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 13:01:03,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 255 events. 106/255 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1149 event pairs, 58 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 412. Up to 175 conditions per place. [2025-02-06 13:01:03,302 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 25 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2025-02-06 13:01:03,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 178 flow [2025-02-06 13:01:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:01:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:01:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2025-02-06 13:01:03,303 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2025-02-06 13:01:03,304 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 114 flow. Second operand 4 states and 158 transitions. [2025-02-06 13:01:03,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 178 flow [2025-02-06 13:01:03,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:01:03,305 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 137 flow [2025-02-06 13:01:03,306 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2025-02-06 13:01:03,306 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2025-02-06 13:01:03,306 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 137 flow [2025-02-06 13:01:03,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 13:01:03,306 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:03,306 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:01:03,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:01:03,307 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:03,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash 17493669, now seen corresponding path program 1 times [2025-02-06 13:01:03,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:03,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343383024] [2025-02-06 13:01:03,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:03,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:03,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:01:03,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:01:03,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:03,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:03,498 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 13:01:03,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:03,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343383024] [2025-02-06 13:01:03,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343383024] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:03,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:03,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:01:03,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832597719] [2025-02-06 13:01:03,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:03,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:01:03,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:03,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:01:03,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:01:03,608 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-02-06 13:01:03,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 13:01:03,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:03,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-02-06 13:01:03,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:03,731 INFO L124 PetriNetUnfolderBase]: 107/258 cut-off events. [2025-02-06 13:01:03,732 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 13:01:03,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 258 events. 107/258 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1163 event pairs, 58 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 433. Up to 174 conditions per place. [2025-02-06 13:01:03,734 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 25 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2025-02-06 13:01:03,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 207 flow [2025-02-06 13:01:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:01:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:01:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 193 transitions. [2025-02-06 13:01:03,737 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6433333333333333 [2025-02-06 13:01:03,737 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 137 flow. Second operand 5 states and 193 transitions. [2025-02-06 13:01:03,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 207 flow [2025-02-06 13:01:03,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:01:03,738 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 171 flow [2025-02-06 13:01:03,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2025-02-06 13:01:03,739 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2025-02-06 13:01:03,739 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 171 flow [2025-02-06 13:01:03,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 13:01:03,739 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:03,739 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:01:03,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:01:03,739 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:03,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash 542254957, now seen corresponding path program 1 times [2025-02-06 13:01:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:03,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495010153] [2025-02-06 13:01:03,742 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:03,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:03,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:01:03,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:01:03,759 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:03,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:03,939 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 13:01:03,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:03,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495010153] [2025-02-06 13:01:03,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495010153] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:03,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128437181] [2025-02-06 13:01:03,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:03,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:03,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:03,942 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 13:01:03,943 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 13:01:03,980 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:01:03,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:01:03,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:03,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:03,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:01:03,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:04,037 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 10 treesize of output 9 [2025-02-06 13:01:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:01:04,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:04,354 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 13:01:04,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128437181] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:04,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:04,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:01:04,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765751348] [2025-02-06 13:01:04,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:04,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:01:04,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:04,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:01:04,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:01:04,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-02-06 13:01:04,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 171 flow. Second operand has 11 states, 11 states have (on average 33.36363636363637) internal successors, (367), 11 states have internal predecessors, (367), 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 13:01:04,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:04,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-02-06 13:01:04,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:04,845 INFO L124 PetriNetUnfolderBase]: 107/257 cut-off events. [2025-02-06 13:01:04,845 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:01:04,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 257 events. 107/257 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1152 event pairs, 58 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 443. Up to 174 conditions per place. [2025-02-06 13:01:04,849 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 24 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2025-02-06 13:01:04,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 229 flow [2025-02-06 13:01:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:01:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:01:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2025-02-06 13:01:04,852 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2025-02-06 13:01:04,852 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 171 flow. Second operand 6 states and 221 transitions. [2025-02-06 13:01:04,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 229 flow [2025-02-06 13:01:04,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:01:04,853 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 180 flow [2025-02-06 13:01:04,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2025-02-06 13:01:04,854 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2025-02-06 13:01:04,854 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 180 flow [2025-02-06 13:01:04,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 33.36363636363637) internal successors, (367), 11 states have internal predecessors, (367), 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 13:01:04,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:04,854 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 13:01:04,863 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 13:01:05,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:05,055 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:05,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:05,056 INFO L85 PathProgramCache]: Analyzing trace with hash -368435391, now seen corresponding path program 1 times [2025-02-06 13:01:05,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:05,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143561132] [2025-02-06 13:01:05,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:05,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:05,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:01:05,069 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:01:05,069 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:05,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:05,231 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 13:01:05,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:05,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143561132] [2025-02-06 13:01:05,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143561132] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:05,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057767753] [2025-02-06 13:01:05,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:05,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:05,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:05,236 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 13:01:05,238 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 13:01:05,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:01:05,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:01:05,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:05,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:05,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:01:05,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:05,311 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 10 treesize of output 9 [2025-02-06 13:01:05,454 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 13:01:05,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:05,601 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 13:01:05,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057767753] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:05,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:05,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:01:05,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137240947] [2025-02-06 13:01:05,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:05,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:01:05,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:05,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:01:05,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:01:06,125 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-02-06 13:01:06,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 180 flow. Second operand has 13 states, 13 states have (on average 33.30769230769231) internal successors, (433), 13 states have internal predecessors, (433), 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 13:01:06,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:06,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-02-06 13:01:06,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:06,411 INFO L124 PetriNetUnfolderBase]: 109/262 cut-off events. [2025-02-06 13:01:06,411 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-06 13:01:06,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 262 events. 109/262 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1176 event pairs, 58 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 451. Up to 167 conditions per place. [2025-02-06 13:01:06,412 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 18 selfloop transitions, 18 changer transitions 0/63 dead transitions. [2025-02-06 13:01:06,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 281 flow [2025-02-06 13:01:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:01:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:01:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 326 transitions. [2025-02-06 13:01:06,413 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6037037037037037 [2025-02-06 13:01:06,413 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 180 flow. Second operand 9 states and 326 transitions. [2025-02-06 13:01:06,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 281 flow [2025-02-06 13:01:06,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 234 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-06 13:01:06,415 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 198 flow [2025-02-06 13:01:06,415 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=198, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2025-02-06 13:01:06,415 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2025-02-06 13:01:06,415 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 198 flow [2025-02-06 13:01:06,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 33.30769230769231) internal successors, (433), 13 states have internal predecessors, (433), 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 13:01:06,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:06,416 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:06,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 13:01:06,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:06,620 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:06,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1466350822, now seen corresponding path program 1 times [2025-02-06 13:01:06,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:06,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470950665] [2025-02-06 13:01:06,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:06,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:06,625 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:01:06,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:01:06,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:06,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:06,664 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 13:01:06,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470950665] [2025-02-06 13:01:06,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470950665] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:06,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:06,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:01:06,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696437247] [2025-02-06 13:01:06,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:06,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:01:06,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:06,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:01:06,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:01:06,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-02-06 13:01:06,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 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 13:01:06,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:06,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-02-06 13:01:06,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:06,806 INFO L124 PetriNetUnfolderBase]: 176/448 cut-off events. [2025-02-06 13:01:06,807 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-02-06 13:01:06,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 448 events. 176/448 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2396 event pairs, 74 based on Foata normal form. 12/325 useless extension candidates. Maximal degree in co-relation 522. Up to 206 conditions per place. [2025-02-06 13:01:06,810 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 62 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2025-02-06 13:01:06,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 439 flow [2025-02-06 13:01:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:01:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:01:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 255 transitions. [2025-02-06 13:01:06,811 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2025-02-06 13:01:06,811 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 198 flow. Second operand 6 states and 255 transitions. [2025-02-06 13:01:06,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 439 flow [2025-02-06 13:01:06,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 94 transitions, 386 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-02-06 13:01:06,813 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 202 flow [2025-02-06 13:01:06,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2025-02-06 13:01:06,813 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 7 predicate places. [2025-02-06 13:01:06,814 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 202 flow [2025-02-06 13:01:06,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 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 13:01:06,815 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:06,815 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:06,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:01:06,815 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:06,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:06,815 INFO L85 PathProgramCache]: Analyzing trace with hash -689501376, now seen corresponding path program 1 times [2025-02-06 13:01:06,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:06,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78034301] [2025-02-06 13:01:06,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:06,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:06,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:01:06,823 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:01:06,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:06,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:01:06,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:06,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78034301] [2025-02-06 13:01:06,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78034301] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:06,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:06,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:01:06,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946596198] [2025-02-06 13:01:06,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:06,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:01:06,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:06,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:01:06,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:01:06,884 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-02-06 13:01:06,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 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 13:01:06,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:06,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-02-06 13:01:06,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:07,010 INFO L124 PetriNetUnfolderBase]: 276/740 cut-off events. [2025-02-06 13:01:07,011 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2025-02-06 13:01:07,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1372 conditions, 740 events. 276/740 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4776 event pairs, 114 based on Foata normal form. 12/539 useless extension candidates. Maximal degree in co-relation 844. Up to 305 conditions per place. [2025-02-06 13:01:07,017 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 54 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2025-02-06 13:01:07,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 89 transitions, 385 flow [2025-02-06 13:01:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:01:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:01:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2025-02-06 13:01:07,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.72 [2025-02-06 13:01:07,018 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 202 flow. Second operand 5 states and 216 transitions. [2025-02-06 13:01:07,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 89 transitions, 385 flow [2025-02-06 13:01:07,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:01:07,021 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 237 flow [2025-02-06 13:01:07,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2025-02-06 13:01:07,021 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2025-02-06 13:01:07,021 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 237 flow [2025-02-06 13:01:07,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 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 13:01:07,023 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:07,023 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:07,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:01:07,023 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:07,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash 408566090, now seen corresponding path program 1 times [2025-02-06 13:01:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:07,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370170903] [2025-02-06 13:01:07,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:07,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:07,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:01:07,037 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:01:07,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:07,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:01:07,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:07,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370170903] [2025-02-06 13:01:07,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370170903] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:07,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:07,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:01:07,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212433031] [2025-02-06 13:01:07,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:07,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:01:07,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:07,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:01:07,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:01:07,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-02-06 13:01:07,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 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 13:01:07,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:07,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-02-06 13:01:07,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:07,238 INFO L124 PetriNetUnfolderBase]: 224/706 cut-off events. [2025-02-06 13:01:07,238 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2025-02-06 13:01:07,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1329 conditions, 706 events. 224/706 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4715 event pairs, 122 based on Foata normal form. 14/521 useless extension candidates. Maximal degree in co-relation 784. Up to 307 conditions per place. [2025-02-06 13:01:07,241 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 58 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2025-02-06 13:01:07,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 442 flow [2025-02-06 13:01:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:01:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:01:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 248 transitions. [2025-02-06 13:01:07,242 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2025-02-06 13:01:07,242 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 237 flow. Second operand 6 states and 248 transitions. [2025-02-06 13:01:07,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 442 flow [2025-02-06 13:01:07,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:01:07,245 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 254 flow [2025-02-06 13:01:07,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2025-02-06 13:01:07,245 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2025-02-06 13:01:07,245 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 254 flow [2025-02-06 13:01:07,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 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 13:01:07,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:07,246 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:07,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:01:07,246 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:07,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1191159516, now seen corresponding path program 1 times [2025-02-06 13:01:07,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:07,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961004986] [2025-02-06 13:01:07,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:07,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:07,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:01:07,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:01:07,255 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:07,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:07,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:07,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961004986] [2025-02-06 13:01:07,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961004986] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:07,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:07,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:01:07,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271946085] [2025-02-06 13:01:07,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:07,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:01:07,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:07,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:01:07,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:01:07,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-02-06 13:01:07,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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 13:01:07,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:07,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-02-06 13:01:07,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:07,426 INFO L124 PetriNetUnfolderBase]: 185/523 cut-off events. [2025-02-06 13:01:07,426 INFO L125 PetriNetUnfolderBase]: For 277/277 co-relation queries the response was YES. [2025-02-06 13:01:07,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 523 events. 185/523 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3003 event pairs, 99 based on Foata normal form. 7/413 useless extension candidates. Maximal degree in co-relation 750. Up to 253 conditions per place. [2025-02-06 13:01:07,429 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 50 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2025-02-06 13:01:07,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 85 transitions, 429 flow [2025-02-06 13:01:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:01:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:01:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 209 transitions. [2025-02-06 13:01:07,430 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6966666666666667 [2025-02-06 13:01:07,430 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 254 flow. Second operand 5 states and 209 transitions. [2025-02-06 13:01:07,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 85 transitions, 429 flow [2025-02-06 13:01:07,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 85 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:01:07,432 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 286 flow [2025-02-06 13:01:07,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2025-02-06 13:01:07,433 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2025-02-06 13:01:07,433 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 286 flow [2025-02-06 13:01:07,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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 13:01:07,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:07,433 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:07,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:01:07,433 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:07,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash 281450148, now seen corresponding path program 1 times [2025-02-06 13:01:07,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:07,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428772396] [2025-02-06 13:01:07,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:07,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:07,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:01:07,443 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:01:07,445 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:07,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:01:07,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428772396] [2025-02-06 13:01:07,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428772396] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:07,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:07,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:01:07,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712452900] [2025-02-06 13:01:07,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:07,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:01:07,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:07,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:01:07,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:01:07,602 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2025-02-06 13:01:07,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:01:07,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:07,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2025-02-06 13:01:07,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:07,676 INFO L124 PetriNetUnfolderBase]: 225/604 cut-off events. [2025-02-06 13:01:07,676 INFO L125 PetriNetUnfolderBase]: For 422/422 co-relation queries the response was YES. [2025-02-06 13:01:07,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1337 conditions, 604 events. 225/604 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3477 event pairs, 163 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 746. Up to 404 conditions per place. [2025-02-06 13:01:07,679 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 39 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2025-02-06 13:01:07,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 67 transitions, 372 flow [2025-02-06 13:01:07,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:01:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:01:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2025-02-06 13:01:07,680 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-02-06 13:01:07,680 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 286 flow. Second operand 5 states and 156 transitions. [2025-02-06 13:01:07,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 67 transitions, 372 flow [2025-02-06 13:01:07,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 67 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:01:07,682 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 282 flow [2025-02-06 13:01:07,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2025-02-06 13:01:07,683 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2025-02-06 13:01:07,683 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 282 flow [2025-02-06 13:01:07,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:01:07,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:07,683 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:07,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:01:07,683 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:07,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash 281450149, now seen corresponding path program 1 times [2025-02-06 13:01:07,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:07,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952624163] [2025-02-06 13:01:07,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:07,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:07,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:01:07,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:01:07,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:07,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:07,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:07,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952624163] [2025-02-06 13:01:07,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952624163] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:07,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930161607] [2025-02-06 13:01:07,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:07,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:07,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:07,839 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 13:01:07,840 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 13:01:07,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:01:07,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:01:07,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:07,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:07,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:01:07,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:07,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:01:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:01:07,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 13:01:07,956 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:01:07,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:01:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:07,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:08,074 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 52 treesize of output 48 [2025-02-06 13:01:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930161607] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:08,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:08,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:01:08,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028870557] [2025-02-06 13:01:08,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:08,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:01:08,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:08,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:01:08,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:01:08,566 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-02-06 13:01:08,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 282 flow. Second operand has 13 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 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 13:01:08,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:08,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-02-06 13:01:08,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:08,942 INFO L124 PetriNetUnfolderBase]: 363/889 cut-off events. [2025-02-06 13:01:08,942 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2025-02-06 13:01:08,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1916 conditions, 889 events. 363/889 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5201 event pairs, 115 based on Foata normal form. 0/721 useless extension candidates. Maximal degree in co-relation 1324. Up to 232 conditions per place. [2025-02-06 13:01:08,947 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 76 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2025-02-06 13:01:08,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 600 flow [2025-02-06 13:01:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:01:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:01:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 334 transitions. [2025-02-06 13:01:08,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2025-02-06 13:01:08,948 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 282 flow. Second operand 9 states and 334 transitions. [2025-02-06 13:01:08,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 600 flow [2025-02-06 13:01:08,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 586 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:01:08,951 INFO L231 Difference]: Finished difference. Result has 82 places, 70 transitions, 331 flow [2025-02-06 13:01:08,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=331, PETRI_PLACES=82, PETRI_TRANSITIONS=70} [2025-02-06 13:01:08,952 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 24 predicate places. [2025-02-06 13:01:08,952 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 70 transitions, 331 flow [2025-02-06 13:01:08,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 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 13:01:08,952 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:08,952 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:08,958 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 13:01:09,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:09,153 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:09,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:09,153 INFO L85 PathProgramCache]: Analyzing trace with hash 135020528, now seen corresponding path program 1 times [2025-02-06 13:01:09,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:09,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772680247] [2025-02-06 13:01:09,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:09,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:09,161 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:01:09,165 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:01:09,165 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:09,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:09,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:09,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772680247] [2025-02-06 13:01:09,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772680247] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:09,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:09,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:01:09,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837625440] [2025-02-06 13:01:09,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:09,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:01:09,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:09,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:01:09,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:01:09,227 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2025-02-06 13:01:09,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 13:01:09,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:09,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2025-02-06 13:01:09,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:09,308 INFO L124 PetriNetUnfolderBase]: 393/942 cut-off events. [2025-02-06 13:01:09,308 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2025-02-06 13:01:09,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 942 events. 393/942 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5400 event pairs, 301 based on Foata normal form. 0/894 useless extension candidates. Maximal degree in co-relation 1526. Up to 686 conditions per place. [2025-02-06 13:01:09,313 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 43 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2025-02-06 13:01:09,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 66 transitions, 423 flow [2025-02-06 13:01:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:01:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:01:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2025-02-06 13:01:09,314 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2025-02-06 13:01:09,314 INFO L175 Difference]: Start difference. First operand has 82 places, 70 transitions, 331 flow. Second operand 4 states and 131 transitions. [2025-02-06 13:01:09,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 66 transitions, 423 flow [2025-02-06 13:01:09,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 393 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-02-06 13:01:09,317 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 307 flow [2025-02-06 13:01:09,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2025-02-06 13:01:09,318 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2025-02-06 13:01:09,319 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 307 flow [2025-02-06 13:01:09,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 13:01:09,319 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:09,319 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:09,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 13:01:09,319 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:09,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:09,320 INFO L85 PathProgramCache]: Analyzing trace with hash 135020529, now seen corresponding path program 1 times [2025-02-06 13:01:09,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:09,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228596925] [2025-02-06 13:01:09,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:09,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:09,325 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:01:09,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:01:09,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:09,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:09,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228596925] [2025-02-06 13:01:09,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228596925] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376904304] [2025-02-06 13:01:09,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:09,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:09,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:09,435 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 13:01:09,436 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 13:01:09,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:01:09,488 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:01:09,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:09,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:09,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:01:09,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:09,548 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:09,576 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 13:01:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:09,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376904304] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:09,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:09,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-02-06 13:01:09,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986894951] [2025-02-06 13:01:09,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:09,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:01:09,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:09,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:01:09,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:01:09,830 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2025-02-06 13:01:09,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 307 flow. Second operand has 11 states, 11 states have (on average 32.72727272727273) internal successors, (360), 11 states have internal predecessors, (360), 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 13:01:09,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:09,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2025-02-06 13:01:09,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:10,049 INFO L124 PetriNetUnfolderBase]: 325/759 cut-off events. [2025-02-06 13:01:10,049 INFO L125 PetriNetUnfolderBase]: For 558/558 co-relation queries the response was YES. [2025-02-06 13:01:10,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1781 conditions, 759 events. 325/759 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4078 event pairs, 107 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 1173. Up to 201 conditions per place. [2025-02-06 13:01:10,052 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 69 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2025-02-06 13:01:10,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 102 transitions, 575 flow [2025-02-06 13:01:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:01:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:01:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 291 transitions. [2025-02-06 13:01:10,053 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6928571428571428 [2025-02-06 13:01:10,053 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 307 flow. Second operand 7 states and 291 transitions. [2025-02-06 13:01:10,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 102 transitions, 575 flow [2025-02-06 13:01:10,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 102 transitions, 567 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:01:10,055 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 349 flow [2025-02-06 13:01:10,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2025-02-06 13:01:10,056 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 23 predicate places. [2025-02-06 13:01:10,056 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 349 flow [2025-02-06 13:01:10,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 32.72727272727273) internal successors, (360), 11 states have internal predecessors, (360), 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 13:01:10,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:10,056 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:10,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 13:01:10,256 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,SelfDestructingSolverStorable12 [2025-02-06 13:01:10,257 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:10,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash -114648183, now seen corresponding path program 1 times [2025-02-06 13:01:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:10,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971289999] [2025-02-06 13:01:10,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:10,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:10,262 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:01:10,266 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:01:10,266 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:10,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:10,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:10,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971289999] [2025-02-06 13:01:10,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971289999] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:10,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349078520] [2025-02-06 13:01:10,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:10,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:10,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:10,400 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 13:01:10,401 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 13:01:10,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:01:10,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:01:10,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:10,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:10,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:01:10,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:10,460 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 13:01:10,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:01:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:01:10,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 13:01:10,496 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:01:10,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:01:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:10,551 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:10,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349078520] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:10,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:01:10,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 11 [2025-02-06 13:01:10,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491921072] [2025-02-06 13:01:10,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:10,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:01:10,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:10,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:01:10,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:01:10,941 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2025-02-06 13:01:10,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 349 flow. Second operand has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 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 13:01:10,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:10,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2025-02-06 13:01:10,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:11,249 INFO L124 PetriNetUnfolderBase]: 396/960 cut-off events. [2025-02-06 13:01:11,250 INFO L125 PetriNetUnfolderBase]: For 1095/1115 co-relation queries the response was YES. [2025-02-06 13:01:11,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 960 events. 396/960 cut-off events. For 1095/1115 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5685 event pairs, 171 based on Foata normal form. 0/860 useless extension candidates. Maximal degree in co-relation 1668. Up to 319 conditions per place. [2025-02-06 13:01:11,255 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 60 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2025-02-06 13:01:11,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 92 transitions, 601 flow [2025-02-06 13:01:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:01:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:01:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 310 transitions. [2025-02-06 13:01:11,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2025-02-06 13:01:11,259 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 349 flow. Second operand 8 states and 310 transitions. [2025-02-06 13:01:11,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 92 transitions, 601 flow [2025-02-06 13:01:11,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 92 transitions, 567 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-06 13:01:11,261 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 366 flow [2025-02-06 13:01:11,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=366, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2025-02-06 13:01:11,262 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 26 predicate places. [2025-02-06 13:01:11,263 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 366 flow [2025-02-06 13:01:11,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 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 13:01:11,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:11,263 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:11,269 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 13:01:11,463 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,SelfDestructingSolverStorable13 [2025-02-06 13:01:11,464 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:11,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:11,464 INFO L85 PathProgramCache]: Analyzing trace with hash 740874143, now seen corresponding path program 1 times [2025-02-06 13:01:11,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:11,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329116444] [2025-02-06 13:01:11,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:11,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:11,470 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:01:11,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:01:11,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:11,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:11,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:11,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329116444] [2025-02-06 13:01:11,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329116444] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:11,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938201181] [2025-02-06 13:01:11,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:11,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:11,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:11,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:01:11,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:01:11,636 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:01:11,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:01:11,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:11,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:11,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:01:11,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:11,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:11,748 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 13:01:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:11,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938201181] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:11,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:11,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-02-06 13:01:11,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121744216] [2025-02-06 13:01:11,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:11,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:01:11,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:11,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:01:11,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:01:12,083 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-02-06 13:01:12,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 366 flow. Second operand has 11 states, 11 states have (on average 32.09090909090909) internal successors, (353), 11 states have internal predecessors, (353), 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 13:01:12,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:12,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-02-06 13:01:12,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:12,334 INFO L124 PetriNetUnfolderBase]: 606/1280 cut-off events. [2025-02-06 13:01:12,335 INFO L125 PetriNetUnfolderBase]: For 1533/1579 co-relation queries the response was YES. [2025-02-06 13:01:12,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3279 conditions, 1280 events. 606/1280 cut-off events. For 1533/1579 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7484 event pairs, 170 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 2646. Up to 353 conditions per place. [2025-02-06 13:01:12,341 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 70 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2025-02-06 13:01:12,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 102 transitions, 673 flow [2025-02-06 13:01:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:01:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:01:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 282 transitions. [2025-02-06 13:01:12,343 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6714285714285714 [2025-02-06 13:01:12,343 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 366 flow. Second operand 7 states and 282 transitions. [2025-02-06 13:01:12,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 102 transitions, 673 flow [2025-02-06 13:01:12,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 102 transitions, 639 flow, removed 2 selfloop flow, removed 7 redundant places. [2025-02-06 13:01:12,346 INFO L231 Difference]: Finished difference. Result has 84 places, 67 transitions, 388 flow [2025-02-06 13:01:12,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2025-02-06 13:01:12,347 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 26 predicate places. [2025-02-06 13:01:12,347 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 388 flow [2025-02-06 13:01:12,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 32.09090909090909) internal successors, (353), 11 states have internal predecessors, (353), 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 13:01:12,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:12,348 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:12,354 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 13:01:12,548 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,SelfDestructingSolverStorable14 [2025-02-06 13:01:12,549 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:12,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1987274773, now seen corresponding path program 1 times [2025-02-06 13:01:12,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:12,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95806922] [2025-02-06 13:01:12,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:12,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:12,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:01:12,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:01:12,564 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:12,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:12,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:12,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95806922] [2025-02-06 13:01:12,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95806922] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:12,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988296115] [2025-02-06 13:01:12,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:12,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:12,637 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 13:01:12,639 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 13:01:12,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:01:12,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:01:12,698 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:12,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:12,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:01:12,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:12,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:12,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988296115] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:12,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:12,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-02-06 13:01:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369354727] [2025-02-06 13:01:12,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:12,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 13:01:12,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:12,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 13:01:12,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:01:13,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-02-06 13:01:13,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 388 flow. Second operand has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 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 13:01:13,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:13,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-02-06 13:01:13,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:13,471 INFO L124 PetriNetUnfolderBase]: 1350/3036 cut-off events. [2025-02-06 13:01:13,471 INFO L125 PetriNetUnfolderBase]: For 4268/4356 co-relation queries the response was YES. [2025-02-06 13:01:13,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 3036 events. 1350/3036 cut-off events. For 4268/4356 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22815 event pairs, 430 based on Foata normal form. 66/2953 useless extension candidates. Maximal degree in co-relation 2901. Up to 741 conditions per place. [2025-02-06 13:01:13,486 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 156 selfloop transitions, 35 changer transitions 0/209 dead transitions. [2025-02-06 13:01:13,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 209 transitions, 1465 flow [2025-02-06 13:01:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 13:01:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 13:01:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 858 transitions. [2025-02-06 13:01:13,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.680952380952381 [2025-02-06 13:01:13,490 INFO L175 Difference]: Start difference. First operand has 84 places, 67 transitions, 388 flow. Second operand 21 states and 858 transitions. [2025-02-06 13:01:13,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 209 transitions, 1465 flow [2025-02-06 13:01:13,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 209 transitions, 1402 flow, removed 14 selfloop flow, removed 4 redundant places. [2025-02-06 13:01:13,497 INFO L231 Difference]: Finished difference. Result has 106 places, 84 transitions, 602 flow [2025-02-06 13:01:13,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=602, PETRI_PLACES=106, PETRI_TRANSITIONS=84} [2025-02-06 13:01:13,498 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 48 predicate places. [2025-02-06 13:01:13,498 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 84 transitions, 602 flow [2025-02-06 13:01:13,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 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 13:01:13,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:13,498 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:13,504 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 13:01:13,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:13,699 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:13,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:13,699 INFO L85 PathProgramCache]: Analyzing trace with hash -454820017, now seen corresponding path program 1 times [2025-02-06 13:01:13,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:13,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741556431] [2025-02-06 13:01:13,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:13,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:13,707 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:01:13,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:01:13,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:13,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:13,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:13,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741556431] [2025-02-06 13:01:13,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741556431] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:13,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320484433] [2025-02-06 13:01:13,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:13,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:13,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:13,769 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 13:01:13,771 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 13:01:13,821 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:01:13,835 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:01:13,836 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:13,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:13,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:01:13,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:13,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:13,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320484433] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:13,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:13,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-02-06 13:01:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381427620] [2025-02-06 13:01:13,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:13,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 13:01:13,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:13,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 13:01:13,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:01:14,162 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-02-06 13:01:14,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 84 transitions, 602 flow. Second operand has 16 states, 16 states have (on average 35.25) internal successors, (564), 16 states have internal predecessors, (564), 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 13:01:14,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:14,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-02-06 13:01:14,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:14,559 INFO L124 PetriNetUnfolderBase]: 1081/2516 cut-off events. [2025-02-06 13:01:14,559 INFO L125 PetriNetUnfolderBase]: For 4650/4760 co-relation queries the response was YES. [2025-02-06 13:01:14,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6760 conditions, 2516 events. 1081/2516 cut-off events. For 4650/4760 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18240 event pairs, 441 based on Foata normal form. 48/2511 useless extension candidates. Maximal degree in co-relation 6712. Up to 754 conditions per place. [2025-02-06 13:01:14,576 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 138 selfloop transitions, 35 changer transitions 0/191 dead transitions. [2025-02-06 13:01:14,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 191 transitions, 1433 flow [2025-02-06 13:01:14,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 13:01:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 13:01:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 849 transitions. [2025-02-06 13:01:14,579 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6738095238095239 [2025-02-06 13:01:14,579 INFO L175 Difference]: Start difference. First operand has 106 places, 84 transitions, 602 flow. Second operand 21 states and 849 transitions. [2025-02-06 13:01:14,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 191 transitions, 1433 flow [2025-02-06 13:01:14,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 191 transitions, 1430 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:01:14,586 INFO L231 Difference]: Finished difference. Result has 128 places, 92 transitions, 753 flow [2025-02-06 13:01:14,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=753, PETRI_PLACES=128, PETRI_TRANSITIONS=92} [2025-02-06 13:01:14,586 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 70 predicate places. [2025-02-06 13:01:14,587 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 92 transitions, 753 flow [2025-02-06 13:01:14,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 35.25) internal successors, (564), 16 states have internal predecessors, (564), 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 13:01:14,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:14,587 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:14,593 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 13:01:14,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-06 13:01:14,788 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:14,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1636922748, now seen corresponding path program 1 times [2025-02-06 13:01:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:14,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509665093] [2025-02-06 13:01:14,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:14,792 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:01:14,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:01:14,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:14,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:01:14,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:14,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509665093] [2025-02-06 13:01:14,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509665093] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:14,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:14,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:01:14,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242063339] [2025-02-06 13:01:14,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:14,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:01:14,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:14,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:01:14,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:01:14,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-02-06 13:01:14,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 92 transitions, 753 flow. Second operand has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 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 13:01:14,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:14,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-02-06 13:01:14,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:15,183 INFO L124 PetriNetUnfolderBase]: 926/2381 cut-off events. [2025-02-06 13:01:15,183 INFO L125 PetriNetUnfolderBase]: For 5811/5889 co-relation queries the response was YES. [2025-02-06 13:01:15,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6707 conditions, 2381 events. 926/2381 cut-off events. For 5811/5889 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17992 event pairs, 370 based on Foata normal form. 1/2309 useless extension candidates. Maximal degree in co-relation 6651. Up to 1578 conditions per place. [2025-02-06 13:01:15,197 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 69 selfloop transitions, 20 changer transitions 11/119 dead transitions. [2025-02-06 13:01:15,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 119 transitions, 1158 flow [2025-02-06 13:01:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:01:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:01:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 250 transitions. [2025-02-06 13:01:15,198 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2025-02-06 13:01:15,198 INFO L175 Difference]: Start difference. First operand has 128 places, 92 transitions, 753 flow. Second operand 6 states and 250 transitions. [2025-02-06 13:01:15,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 119 transitions, 1158 flow [2025-02-06 13:01:15,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 119 transitions, 1125 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-02-06 13:01:15,206 INFO L231 Difference]: Finished difference. Result has 125 places, 105 transitions, 956 flow [2025-02-06 13:01:15,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=956, PETRI_PLACES=125, PETRI_TRANSITIONS=105} [2025-02-06 13:01:15,206 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 67 predicate places. [2025-02-06 13:01:15,206 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 105 transitions, 956 flow [2025-02-06 13:01:15,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 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 13:01:15,206 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:15,206 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:15,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-06 13:01:15,206 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:15,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash 897945308, now seen corresponding path program 1 times [2025-02-06 13:01:15,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:15,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735905508] [2025-02-06 13:01:15,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:15,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:01:15,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:01:15,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:15,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:01:15,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:15,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735905508] [2025-02-06 13:01:15,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735905508] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:15,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107982346] [2025-02-06 13:01:15,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:15,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:15,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:15,300 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 13:01:15,301 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 13:01:15,342 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:01:15,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:01:15,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:15,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:15,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-06 13:01:15,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:01:15,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:01:15,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107982346] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:15,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:01:15,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2025-02-06 13:01:15,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14708686] [2025-02-06 13:01:15,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:15,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:01:15,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:15,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:01:15,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:01:15,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-02-06 13:01:15,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 105 transitions, 956 flow. Second operand has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 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 13:01:15,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:15,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-02-06 13:01:15,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:15,813 INFO L124 PetriNetUnfolderBase]: 914/2361 cut-off events. [2025-02-06 13:01:15,814 INFO L125 PetriNetUnfolderBase]: For 6511/6589 co-relation queries the response was YES. [2025-02-06 13:01:15,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6862 conditions, 2361 events. 914/2361 cut-off events. For 6511/6589 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17965 event pairs, 622 based on Foata normal form. 2/2291 useless extension candidates. Maximal degree in co-relation 6805. Up to 1525 conditions per place. [2025-02-06 13:01:15,827 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 70 selfloop transitions, 27 changer transitions 11/127 dead transitions. [2025-02-06 13:01:15,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 127 transitions, 1242 flow [2025-02-06 13:01:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:01:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:01:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 324 transitions. [2025-02-06 13:01:15,829 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.675 [2025-02-06 13:01:15,829 INFO L175 Difference]: Start difference. First operand has 125 places, 105 transitions, 956 flow. Second operand 8 states and 324 transitions. [2025-02-06 13:01:15,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 127 transitions, 1242 flow [2025-02-06 13:01:15,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 127 transitions, 1216 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-06 13:01:15,839 INFO L231 Difference]: Finished difference. Result has 128 places, 105 transitions, 961 flow [2025-02-06 13:01:15,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=961, PETRI_PLACES=128, PETRI_TRANSITIONS=105} [2025-02-06 13:01:15,840 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 70 predicate places. [2025-02-06 13:01:15,840 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 105 transitions, 961 flow [2025-02-06 13:01:15,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 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 13:01:15,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:15,840 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:15,849 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 13:01:16,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:16,044 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:16,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:16,044 INFO L85 PathProgramCache]: Analyzing trace with hash 130459416, now seen corresponding path program 1 times [2025-02-06 13:01:16,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:16,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637601641] [2025-02-06 13:01:16,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:16,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:16,049 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:01:16,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:01:16,055 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:16,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:16,136 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 13:01:16,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:16,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637601641] [2025-02-06 13:01:16,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637601641] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:16,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027023992] [2025-02-06 13:01:16,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:16,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:16,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:16,139 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 13:01:16,140 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 13:01:16,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:01:16,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:01:16,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:16,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:16,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:01:16,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:01:16,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:01:16,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027023992] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:16,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:01:16,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 15 [2025-02-06 13:01:16,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330403358] [2025-02-06 13:01:16,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:16,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:01:16,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:16,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:01:16,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:01:16,448 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-02-06 13:01:16,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 105 transitions, 961 flow. Second operand has 8 states, 8 states have (on average 36.0) internal successors, (288), 8 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:01:16,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:16,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-02-06 13:01:16,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:16,712 INFO L124 PetriNetUnfolderBase]: 898/2276 cut-off events. [2025-02-06 13:01:16,712 INFO L125 PetriNetUnfolderBase]: For 6264/6354 co-relation queries the response was YES. [2025-02-06 13:01:16,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6604 conditions, 2276 events. 898/2276 cut-off events. For 6264/6354 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17185 event pairs, 613 based on Foata normal form. 2/2191 useless extension candidates. Maximal degree in co-relation 6541. Up to 1433 conditions per place. [2025-02-06 13:01:16,724 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 72 selfloop transitions, 30 changer transitions 11/132 dead transitions. [2025-02-06 13:01:16,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 1256 flow [2025-02-06 13:01:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:01:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:01:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 370 transitions. [2025-02-06 13:01:16,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2025-02-06 13:01:16,745 INFO L175 Difference]: Start difference. First operand has 128 places, 105 transitions, 961 flow. Second operand 9 states and 370 transitions. [2025-02-06 13:01:16,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 1256 flow [2025-02-06 13:01:16,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 132 transitions, 1230 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-02-06 13:01:16,752 INFO L231 Difference]: Finished difference. Result has 133 places, 101 transitions, 951 flow [2025-02-06 13:01:16,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=951, PETRI_PLACES=133, PETRI_TRANSITIONS=101} [2025-02-06 13:01:16,753 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 75 predicate places. [2025-02-06 13:01:16,753 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 101 transitions, 951 flow [2025-02-06 13:01:16,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 36.0) internal successors, (288), 8 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:01:16,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:16,753 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:16,759 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 13:01:16,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:16,954 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:16,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1923395113, now seen corresponding path program 2 times [2025-02-06 13:01:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:16,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820046324] [2025-02-06 13:01:16,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:01:16,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:16,960 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-06 13:01:16,970 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:01:16,970 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:01:16,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:17,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:17,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820046324] [2025-02-06 13:01:17,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820046324] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:17,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607142228] [2025-02-06 13:01:17,177 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:01:17,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:17,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:17,179 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 13:01:17,181 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 13:01:17,223 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-06 13:01:17,239 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:01:17,239 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:01:17,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:17,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 13:01:17,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:17,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:01:17,284 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:01:17,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:01:17,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 13:01:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:17,384 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:17,504 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 52 treesize of output 48 [2025-02-06 13:01:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:17,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607142228] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:17,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:17,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 21 [2025-02-06 13:01:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062022740] [2025-02-06 13:01:17,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:17,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 13:01:17,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:17,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 13:01:17,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2025-02-06 13:01:18,933 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2025-02-06 13:01:18,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 101 transitions, 951 flow. Second operand has 23 states, 23 states have (on average 29.08695652173913) internal successors, (669), 23 states have internal predecessors, (669), 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 13:01:18,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:18,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2025-02-06 13:01:18,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:19,966 INFO L124 PetriNetUnfolderBase]: 2517/5342 cut-off events. [2025-02-06 13:01:19,966 INFO L125 PetriNetUnfolderBase]: For 12594/12831 co-relation queries the response was YES. [2025-02-06 13:01:19,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15503 conditions, 5342 events. 2517/5342 cut-off events. For 12594/12831 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 41635 event pairs, 674 based on Foata normal form. 66/5336 useless extension candidates. Maximal degree in co-relation 15275. Up to 708 conditions per place. [2025-02-06 13:01:19,993 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 215 selfloop transitions, 40 changer transitions 0/269 dead transitions. [2025-02-06 13:01:19,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 269 transitions, 2293 flow [2025-02-06 13:01:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 13:01:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 13:01:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 724 transitions. [2025-02-06 13:01:19,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6350877192982456 [2025-02-06 13:01:19,994 INFO L175 Difference]: Start difference. First operand has 133 places, 101 transitions, 951 flow. Second operand 19 states and 724 transitions. [2025-02-06 13:01:19,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 269 transitions, 2293 flow [2025-02-06 13:01:20,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 269 transitions, 2232 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-02-06 13:01:20,008 INFO L231 Difference]: Finished difference. Result has 151 places, 113 transitions, 1155 flow [2025-02-06 13:01:20,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1155, PETRI_PLACES=151, PETRI_TRANSITIONS=113} [2025-02-06 13:01:20,009 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 93 predicate places. [2025-02-06 13:01:20,009 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 113 transitions, 1155 flow [2025-02-06 13:01:20,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 29.08695652173913) internal successors, (669), 23 states have internal predecessors, (669), 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 13:01:20,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:20,009 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:20,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 13:01:20,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-02-06 13:01:20,214 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:20,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1446423932, now seen corresponding path program 2 times [2025-02-06 13:01:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:20,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269694619] [2025-02-06 13:01:20,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:01:20,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:20,220 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-06 13:01:20,223 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 16 of 19 statements. [2025-02-06 13:01:20,223 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:01:20,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:20,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:20,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269694619] [2025-02-06 13:01:20,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269694619] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:20,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:20,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:01:20,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562010471] [2025-02-06 13:01:20,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:20,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:01:20,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:20,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:01:20,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:01:20,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-02-06 13:01:20,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 113 transitions, 1155 flow. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 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 13:01:20,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:20,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-02-06 13:01:20,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:20,931 INFO L124 PetriNetUnfolderBase]: 2581/6712 cut-off events. [2025-02-06 13:01:20,931 INFO L125 PetriNetUnfolderBase]: For 18144/18446 co-relation queries the response was YES. [2025-02-06 13:01:20,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19096 conditions, 6712 events. 2581/6712 cut-off events. For 18144/18446 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 64485 event pairs, 292 based on Foata normal form. 28/6656 useless extension candidates. Maximal degree in co-relation 17633. Up to 1887 conditions per place. [2025-02-06 13:01:20,972 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 90 selfloop transitions, 29 changer transitions 20/161 dead transitions. [2025-02-06 13:01:20,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 161 transitions, 1852 flow [2025-02-06 13:01:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:01:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:01:20,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 255 transitions. [2025-02-06 13:01:20,974 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2025-02-06 13:01:20,974 INFO L175 Difference]: Start difference. First operand has 151 places, 113 transitions, 1155 flow. Second operand 6 states and 255 transitions. [2025-02-06 13:01:20,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 161 transitions, 1852 flow [2025-02-06 13:01:21,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 161 transitions, 1777 flow, removed 11 selfloop flow, removed 5 redundant places. [2025-02-06 13:01:21,043 INFO L231 Difference]: Finished difference. Result has 153 places, 101 transitions, 1046 flow [2025-02-06 13:01:21,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1046, PETRI_PLACES=153, PETRI_TRANSITIONS=101} [2025-02-06 13:01:21,044 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 95 predicate places. [2025-02-06 13:01:21,044 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 101 transitions, 1046 flow [2025-02-06 13:01:21,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 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 13:01:21,044 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:21,044 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:21,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-06 13:01:21,044 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:21,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:21,044 INFO L85 PathProgramCache]: Analyzing trace with hash -504293139, now seen corresponding path program 1 times [2025-02-06 13:01:21,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:21,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525653412] [2025-02-06 13:01:21,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:21,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:21,049 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:01:21,056 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:01:21,056 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:21,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:01:21,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:21,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525653412] [2025-02-06 13:01:21,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525653412] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:21,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593780511] [2025-02-06 13:01:21,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:21,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:21,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:21,181 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 13:01:21,183 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 13:01:21,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:01:21,238 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:01:21,239 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:21,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:21,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:01:21,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:01:21,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:21,413 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 13:01:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:01:21,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593780511] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:21,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:21,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-02-06 13:01:21,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361028021] [2025-02-06 13:01:21,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:21,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:01:21,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:21,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:01:21,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:01:21,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2025-02-06 13:01:21,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 101 transitions, 1046 flow. Second operand has 20 states, 20 states have (on average 32.8) internal successors, (656), 20 states have internal predecessors, (656), 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 13:01:21,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:21,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2025-02-06 13:01:21,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:22,816 INFO L124 PetriNetUnfolderBase]: 3133/6907 cut-off events. [2025-02-06 13:01:22,817 INFO L125 PetriNetUnfolderBase]: For 19647/20013 co-relation queries the response was YES. [2025-02-06 13:01:22,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21274 conditions, 6907 events. 3133/6907 cut-off events. For 19647/20013 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 61139 event pairs, 831 based on Foata normal form. 72/6830 useless extension candidates. Maximal degree in co-relation 19408. Up to 1384 conditions per place. [2025-02-06 13:01:22,858 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 131 selfloop transitions, 34 changer transitions 0/184 dead transitions. [2025-02-06 13:01:22,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 184 transitions, 1790 flow [2025-02-06 13:01:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:01:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:01:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 421 transitions. [2025-02-06 13:01:22,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7016666666666667 [2025-02-06 13:01:22,864 INFO L175 Difference]: Start difference. First operand has 153 places, 101 transitions, 1046 flow. Second operand 10 states and 421 transitions. [2025-02-06 13:01:22,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 184 transitions, 1790 flow [2025-02-06 13:01:22,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 184 transitions, 1676 flow, removed 9 selfloop flow, removed 12 redundant places. [2025-02-06 13:01:22,881 INFO L231 Difference]: Finished difference. Result has 140 places, 103 transitions, 1043 flow [2025-02-06 13:01:22,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1043, PETRI_PLACES=140, PETRI_TRANSITIONS=103} [2025-02-06 13:01:22,882 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 82 predicate places. [2025-02-06 13:01:22,882 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 103 transitions, 1043 flow [2025-02-06 13:01:22,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 32.8) internal successors, (656), 20 states have internal predecessors, (656), 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 13:01:22,882 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:22,882 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] [2025-02-06 13:01:22,888 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 13:01:23,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:23,083 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:23,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:23,083 INFO L85 PathProgramCache]: Analyzing trace with hash 222971260, now seen corresponding path program 1 times [2025-02-06 13:01:23,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:23,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639389480] [2025-02-06 13:01:23,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:23,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:01:23,095 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:01:23,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:23,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:01:23,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:23,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639389480] [2025-02-06 13:01:23,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639389480] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:23,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821453966] [2025-02-06 13:01:23,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:23,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:23,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:23,207 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 13:01:23,209 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 13:01:23,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:01:23,271 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:01:23,271 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:23,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:23,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:01:23,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:01:23,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:01:23,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821453966] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:23,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:01:23,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 15 [2025-02-06 13:01:23,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366622602] [2025-02-06 13:01:23,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:23,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:01:23,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:23,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:01:23,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:01:23,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-02-06 13:01:23,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 103 transitions, 1043 flow. Second operand has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 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 13:01:23,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:23,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-02-06 13:01:23,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:24,141 INFO L124 PetriNetUnfolderBase]: 3032/6899 cut-off events. [2025-02-06 13:01:24,141 INFO L125 PetriNetUnfolderBase]: For 21886/22349 co-relation queries the response was YES. [2025-02-06 13:01:24,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21613 conditions, 6899 events. 3032/6899 cut-off events. For 21886/22349 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 60846 event pairs, 1043 based on Foata normal form. 205/6993 useless extension candidates. Maximal degree in co-relation 19995. Up to 3137 conditions per place. [2025-02-06 13:01:24,178 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 85 selfloop transitions, 20 changer transitions 0/127 dead transitions. [2025-02-06 13:01:24,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 127 transitions, 1511 flow [2025-02-06 13:01:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:01:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:01:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 264 transitions. [2025-02-06 13:01:24,179 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2025-02-06 13:01:24,179 INFO L175 Difference]: Start difference. First operand has 140 places, 103 transitions, 1043 flow. Second operand 7 states and 264 transitions. [2025-02-06 13:01:24,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 127 transitions, 1511 flow [2025-02-06 13:01:24,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 127 transitions, 1489 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:01:24,198 INFO L231 Difference]: Finished difference. Result has 145 places, 104 transitions, 1103 flow [2025-02-06 13:01:24,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1103, PETRI_PLACES=145, PETRI_TRANSITIONS=104} [2025-02-06 13:01:24,199 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 87 predicate places. [2025-02-06 13:01:24,199 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 104 transitions, 1103 flow [2025-02-06 13:01:24,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 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 13:01:24,199 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:24,199 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:24,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-06 13:01:24,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:24,400 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:24,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash -397443571, now seen corresponding path program 2 times [2025-02-06 13:01:24,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:24,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813965551] [2025-02-06 13:01:24,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:01:24,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:24,406 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 13:01:24,413 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:01:24,414 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:01:24,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:24,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:24,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813965551] [2025-02-06 13:01:24,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813965551] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:24,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488761216] [2025-02-06 13:01:24,635 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:01:24,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:24,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:24,638 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 13:01:24,639 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 13:01:24,683 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 13:01:24,702 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:01:24,702 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:01:24,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:24,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 13:01:24,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:24,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:01:24,782 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 13:01:24,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2025-02-06 13:01:24,796 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:01:24,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:01:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:24,895 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:25,021 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 52 treesize of output 48 [2025-02-06 13:01:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:25,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488761216] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:25,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:25,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 22 [2025-02-06 13:01:25,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642192901] [2025-02-06 13:01:25,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:25,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:01:25,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:25,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:01:25,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:01:26,758 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2025-02-06 13:01:26,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 104 transitions, 1103 flow. Second operand has 24 states, 24 states have (on average 23.375) internal successors, (561), 24 states have internal predecessors, (561), 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 13:01:26,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:26,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2025-02-06 13:01:26,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:29,133 INFO L124 PetriNetUnfolderBase]: 7247/13645 cut-off events. [2025-02-06 13:01:29,133 INFO L125 PetriNetUnfolderBase]: For 46012/46012 co-relation queries the response was YES. [2025-02-06 13:01:29,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46329 conditions, 13645 events. 7247/13645 cut-off events. For 46012/46012 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 109421 event pairs, 356 based on Foata normal form. 272/13908 useless extension candidates. Maximal degree in co-relation 41993. Up to 3118 conditions per place. [2025-02-06 13:01:29,252 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 241 selfloop transitions, 45 changer transitions 0/299 dead transitions. [2025-02-06 13:01:29,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 299 transitions, 3231 flow [2025-02-06 13:01:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-06 13:01:29,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-02-06 13:01:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 665 transitions. [2025-02-06 13:01:29,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48188405797101447 [2025-02-06 13:01:29,254 INFO L175 Difference]: Start difference. First operand has 145 places, 104 transitions, 1103 flow. Second operand 23 states and 665 transitions. [2025-02-06 13:01:29,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 299 transitions, 3231 flow [2025-02-06 13:01:29,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 299 transitions, 3165 flow, removed 12 selfloop flow, removed 6 redundant places. [2025-02-06 13:01:29,322 INFO L231 Difference]: Finished difference. Result has 165 places, 121 transitions, 1317 flow [2025-02-06 13:01:29,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1317, PETRI_PLACES=165, PETRI_TRANSITIONS=121} [2025-02-06 13:01:29,323 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 107 predicate places. [2025-02-06 13:01:29,323 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 121 transitions, 1317 flow [2025-02-06 13:01:29,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 23.375) internal successors, (561), 24 states have internal predecessors, (561), 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 13:01:29,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:29,323 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:29,329 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 13:01:29,523 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,SelfDestructingSolverStorable24 [2025-02-06 13:01:29,524 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:29,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash 564151707, now seen corresponding path program 1 times [2025-02-06 13:01:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:29,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777499349] [2025-02-06 13:01:29,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:29,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:29,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:01:29,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:01:29,536 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:29,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:01:29,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:29,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777499349] [2025-02-06 13:01:29,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777499349] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:29,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115692932] [2025-02-06 13:01:29,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:29,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:29,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:29,678 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 13:01:29,683 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 13:01:29,729 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:01:29,746 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:01:29,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:29,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:29,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:01:29,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:01:29,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:29,899 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 13:01:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:01:29,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115692932] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:29,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:29,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-02-06 13:01:29,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535826581] [2025-02-06 13:01:29,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:29,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:01:29,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:29,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:01:29,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:01:30,480 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-02-06 13:01:30,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 121 transitions, 1317 flow. Second operand has 20 states, 20 states have (on average 32.1) internal successors, (642), 20 states have internal predecessors, (642), 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 13:01:30,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:30,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-02-06 13:01:30,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:31,615 INFO L124 PetriNetUnfolderBase]: 5020/10306 cut-off events. [2025-02-06 13:01:31,615 INFO L125 PetriNetUnfolderBase]: For 42353/42590 co-relation queries the response was YES. [2025-02-06 13:01:31,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36130 conditions, 10306 events. 5020/10306 cut-off events. For 42353/42590 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 88130 event pairs, 967 based on Foata normal form. 142/10256 useless extension candidates. Maximal degree in co-relation 33014. Up to 2390 conditions per place. [2025-02-06 13:01:31,702 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 163 selfloop transitions, 28 changer transitions 0/223 dead transitions. [2025-02-06 13:01:31,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 223 transitions, 2529 flow [2025-02-06 13:01:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:01:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:01:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 407 transitions. [2025-02-06 13:01:31,705 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6783333333333333 [2025-02-06 13:01:31,705 INFO L175 Difference]: Start difference. First operand has 165 places, 121 transitions, 1317 flow. Second operand 10 states and 407 transitions. [2025-02-06 13:01:31,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 223 transitions, 2529 flow [2025-02-06 13:01:31,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 223 transitions, 2467 flow, removed 10 selfloop flow, removed 11 redundant places. [2025-02-06 13:01:31,758 INFO L231 Difference]: Finished difference. Result has 166 places, 125 transitions, 1369 flow [2025-02-06 13:01:31,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1369, PETRI_PLACES=166, PETRI_TRANSITIONS=125} [2025-02-06 13:01:31,759 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 108 predicate places. [2025-02-06 13:01:31,759 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 125 transitions, 1369 flow [2025-02-06 13:01:31,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 32.1) internal successors, (642), 20 states have internal predecessors, (642), 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 13:01:31,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:31,759 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:31,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 13:01:31,960 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,SelfDestructingSolverStorable25 [2025-02-06 13:01:31,960 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:31,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:31,960 INFO L85 PathProgramCache]: Analyzing trace with hash -509713817, now seen corresponding path program 2 times [2025-02-06 13:01:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:31,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089991735] [2025-02-06 13:01:31,960 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:01:31,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:31,965 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:01:31,972 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:01:31,972 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:01:31,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:32,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:32,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089991735] [2025-02-06 13:01:32,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089991735] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:32,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975085105] [2025-02-06 13:01:32,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:01:32,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:32,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:32,045 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 13:01:32,046 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 13:01:32,090 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:01:32,112 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:01:32,112 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:01:32,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:32,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:01:32,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:32,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:32,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975085105] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:32,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:32,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-02-06 13:01:32,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693593078] [2025-02-06 13:01:32,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:32,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 13:01:32,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:32,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 13:01:32,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-02-06 13:01:32,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-02-06 13:01:32,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 125 transitions, 1369 flow. Second operand has 19 states, 19 states have (on average 34.94736842105263) internal successors, (664), 19 states have internal predecessors, (664), 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 13:01:32,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:32,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-02-06 13:01:32,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:33,995 INFO L124 PetriNetUnfolderBase]: 6620/15049 cut-off events. [2025-02-06 13:01:33,995 INFO L125 PetriNetUnfolderBase]: For 76142/76670 co-relation queries the response was YES. [2025-02-06 13:01:34,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54321 conditions, 15049 events. 6620/15049 cut-off events. For 76142/76670 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 151164 event pairs, 3313 based on Foata normal form. 237/14799 useless extension candidates. Maximal degree in co-relation 51068. Up to 5630 conditions per place. [2025-02-06 13:01:34,143 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 136 selfloop transitions, 54 changer transitions 0/230 dead transitions. [2025-02-06 13:01:34,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 230 transitions, 2862 flow [2025-02-06 13:01:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 13:01:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 13:01:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 488 transitions. [2025-02-06 13:01:34,145 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2025-02-06 13:01:34,145 INFO L175 Difference]: Start difference. First operand has 166 places, 125 transitions, 1369 flow. Second operand 12 states and 488 transitions. [2025-02-06 13:01:34,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 230 transitions, 2862 flow [2025-02-06 13:01:34,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 230 transitions, 2825 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:01:34,221 INFO L231 Difference]: Finished difference. Result has 180 places, 152 transitions, 1971 flow [2025-02-06 13:01:34,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1971, PETRI_PLACES=180, PETRI_TRANSITIONS=152} [2025-02-06 13:01:34,222 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 122 predicate places. [2025-02-06 13:01:34,222 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 152 transitions, 1971 flow [2025-02-06 13:01:34,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 34.94736842105263) internal successors, (664), 19 states have internal predecessors, (664), 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 13:01:34,222 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:34,222 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, 1] [2025-02-06 13:01:34,299 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 13:01:34,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:34,422 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:34,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:34,423 INFO L85 PathProgramCache]: Analyzing trace with hash 464256764, now seen corresponding path program 1 times [2025-02-06 13:01:34,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:34,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387173350] [2025-02-06 13:01:34,423 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:34,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:34,427 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 13:01:34,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:01:34,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:34,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:01:34,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:34,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387173350] [2025-02-06 13:01:34,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387173350] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:34,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103184797] [2025-02-06 13:01:34,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:34,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:34,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:34,533 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 13:01:34,535 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 13:01:34,584 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 13:01:34,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:01:34,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:34,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:34,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:01:34,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:34,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:34,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103184797] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:34,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:01:34,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2025-02-06 13:01:34,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700111121] [2025-02-06 13:01:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:34,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:01:34,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:34,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:01:34,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:01:34,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2025-02-06 13:01:34,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 152 transitions, 1971 flow. Second operand has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 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 13:01:34,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:34,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2025-02-06 13:01:34,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:36,666 INFO L124 PetriNetUnfolderBase]: 6902/15132 cut-off events. [2025-02-06 13:01:36,666 INFO L125 PetriNetUnfolderBase]: For 87582/88116 co-relation queries the response was YES. [2025-02-06 13:01:36,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57599 conditions, 15132 events. 6902/15132 cut-off events. For 87582/88116 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 147254 event pairs, 2715 based on Foata normal form. 436/15232 useless extension candidates. Maximal degree in co-relation 54255. Up to 6809 conditions per place. [2025-02-06 13:01:36,867 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 87 selfloop transitions, 48 changer transitions 0/174 dead transitions. [2025-02-06 13:01:36,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 174 transitions, 2475 flow [2025-02-06 13:01:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:01:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:01:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 266 transitions. [2025-02-06 13:01:36,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2025-02-06 13:01:36,869 INFO L175 Difference]: Start difference. First operand has 180 places, 152 transitions, 1971 flow. Second operand 7 states and 266 transitions. [2025-02-06 13:01:36,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 174 transitions, 2475 flow [2025-02-06 13:01:37,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 174 transitions, 2470 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:01:37,014 INFO L231 Difference]: Finished difference. Result has 186 places, 153 transitions, 2161 flow [2025-02-06 13:01:37,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2161, PETRI_PLACES=186, PETRI_TRANSITIONS=153} [2025-02-06 13:01:37,019 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 128 predicate places. [2025-02-06 13:01:37,019 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 153 transitions, 2161 flow [2025-02-06 13:01:37,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 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 13:01:37,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:37,019 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:37,027 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 13:01:37,223 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,SelfDestructingSolverStorable27 [2025-02-06 13:01:37,223 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:37,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:37,224 INFO L85 PathProgramCache]: Analyzing trace with hash -531803315, now seen corresponding path program 3 times [2025-02-06 13:01:37,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:37,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021133868] [2025-02-06 13:01:37,224 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:01:37,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:37,230 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 5 equivalence classes. [2025-02-06 13:01:37,237 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 26 statements. [2025-02-06 13:01:37,237 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:01:37,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-02-06 13:01:37,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:37,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021133868] [2025-02-06 13:01:37,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021133868] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:37,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134220304] [2025-02-06 13:01:37,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:01:37,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:37,378 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 13:01:37,380 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 13:01:37,432 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 5 equivalence classes. [2025-02-06 13:01:37,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 26 statements. [2025-02-06 13:01:37,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:01:37,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:37,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:01:37,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:37,468 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 13:01:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-06 13:01:37,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-06 13:01:37,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134220304] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:37,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:37,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2025-02-06 13:01:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020024859] [2025-02-06 13:01:37,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:37,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:01:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:37,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:01:37,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:01:38,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-02-06 13:01:38,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 153 transitions, 2161 flow. Second operand has 20 states, 20 states have (on average 30.65) internal successors, (613), 20 states have internal predecessors, (613), 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 13:01:38,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:38,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-02-06 13:01:38,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:40,827 INFO L124 PetriNetUnfolderBase]: 8910/16887 cut-off events. [2025-02-06 13:01:40,827 INFO L125 PetriNetUnfolderBase]: For 110061/111007 co-relation queries the response was YES. [2025-02-06 13:01:40,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68721 conditions, 16887 events. 8910/16887 cut-off events. For 110061/111007 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 148925 event pairs, 202 based on Foata normal form. 424/17205 useless extension candidates. Maximal degree in co-relation 64341. Up to 4650 conditions per place. [2025-02-06 13:01:41,068 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 163 selfloop transitions, 65 changer transitions 0/250 dead transitions. [2025-02-06 13:01:41,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 250 transitions, 3597 flow [2025-02-06 13:01:41,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 13:01:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 13:01:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 428 transitions. [2025-02-06 13:01:41,070 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2025-02-06 13:01:41,070 INFO L175 Difference]: Start difference. First operand has 186 places, 153 transitions, 2161 flow. Second operand 12 states and 428 transitions. [2025-02-06 13:01:41,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 250 transitions, 3597 flow [2025-02-06 13:01:41,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 250 transitions, 3493 flow, removed 5 selfloop flow, removed 7 redundant places. [2025-02-06 13:01:41,240 INFO L231 Difference]: Finished difference. Result has 189 places, 152 transitions, 2181 flow [2025-02-06 13:01:41,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2051, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2181, PETRI_PLACES=189, PETRI_TRANSITIONS=152} [2025-02-06 13:01:41,241 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 131 predicate places. [2025-02-06 13:01:41,241 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 152 transitions, 2181 flow [2025-02-06 13:01:41,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.65) internal successors, (613), 20 states have internal predecessors, (613), 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 13:01:41,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:41,241 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:41,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-06 13:01:41,446 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,SelfDestructingSolverStorable28 [2025-02-06 13:01:41,446 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:41,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash 661912725, now seen corresponding path program 2 times [2025-02-06 13:01:41,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:41,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807648579] [2025-02-06 13:01:41,446 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:01:41,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:41,454 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 13:01:41,463 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:01:41,463 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:01:41,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:01:41,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:41,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807648579] [2025-02-06 13:01:41,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807648579] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:41,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829629880] [2025-02-06 13:01:41,535 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:01:41,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:41,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:41,537 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 13:01:41,539 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 13:01:41,588 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 13:01:41,607 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 13:01:41,607 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:01:41,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:41,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:01:41,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:01:41,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:01:41,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829629880] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:41,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:41,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2025-02-06 13:01:41,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999483817] [2025-02-06 13:01:41,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:41,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 13:01:41,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:41,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 13:01:41,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2025-02-06 13:01:42,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 60 [2025-02-06 13:01:42,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 152 transitions, 2181 flow. Second operand has 22 states, 22 states have (on average 35.18181818181818) internal successors, (774), 22 states have internal predecessors, (774), 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 13:01:42,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:42,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 60 [2025-02-06 13:01:42,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:43,708 INFO L124 PetriNetUnfolderBase]: 6034/13989 cut-off events. [2025-02-06 13:01:43,708 INFO L125 PetriNetUnfolderBase]: For 95671/95995 co-relation queries the response was YES. [2025-02-06 13:01:43,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54758 conditions, 13989 events. 6034/13989 cut-off events. For 95671/95995 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 136670 event pairs, 1778 based on Foata normal form. 165/13876 useless extension candidates. Maximal degree in co-relation 52213. Up to 2577 conditions per place. [2025-02-06 13:01:43,850 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 254 selfloop transitions, 67 changer transitions 0/359 dead transitions. [2025-02-06 13:01:43,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 359 transitions, 4959 flow [2025-02-06 13:01:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-06 13:01:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-02-06 13:01:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1259 transitions. [2025-02-06 13:01:43,852 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6557291666666667 [2025-02-06 13:01:43,852 INFO L175 Difference]: Start difference. First operand has 189 places, 152 transitions, 2181 flow. Second operand 32 states and 1259 transitions. [2025-02-06 13:01:43,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 359 transitions, 4959 flow [2025-02-06 13:01:43,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 359 transitions, 4470 flow, removed 3 selfloop flow, removed 10 redundant places. [2025-02-06 13:01:44,000 INFO L231 Difference]: Finished difference. Result has 214 places, 175 transitions, 2511 flow [2025-02-06 13:01:44,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2511, PETRI_PLACES=214, PETRI_TRANSITIONS=175} [2025-02-06 13:01:44,000 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 156 predicate places. [2025-02-06 13:01:44,000 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 175 transitions, 2511 flow [2025-02-06 13:01:44,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.18181818181818) internal successors, (774), 22 states have internal predecessors, (774), 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 13:01:44,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:44,001 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:44,006 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 13:01:44,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:44,201 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:44,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1844002861, now seen corresponding path program 3 times [2025-02-06 13:01:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:44,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172479056] [2025-02-06 13:01:44,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:01:44,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:44,210 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 5 equivalence classes. [2025-02-06 13:01:44,215 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 27 statements. [2025-02-06 13:01:44,215 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:01:44,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-06 13:01:44,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172479056] [2025-02-06 13:01:44,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172479056] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560322705] [2025-02-06 13:01:44,313 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:01:44,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:44,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:44,315 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 13:01:44,317 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 13:01:44,370 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 5 equivalence classes. [2025-02-06 13:01:44,385 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 27 statements. [2025-02-06 13:01:44,385 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:01:44,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:44,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 13:01:44,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:44,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:01:44,439 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 13:01:44,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2025-02-06 13:01:44,449 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:01:44,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:01:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-06 13:01:44,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:44,639 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 42 treesize of output 38 [2025-02-06 13:01:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-06 13:01:44,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560322705] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:44,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:44,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2025-02-06 13:01:44,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006121309] [2025-02-06 13:01:44,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:44,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:01:44,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:44,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:01:44,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:01:45,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-02-06 13:01:45,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 175 transitions, 2511 flow. Second operand has 17 states, 17 states have (on average 28.470588235294116) internal successors, (484), 17 states have internal predecessors, (484), 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 13:01:45,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:45,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-02-06 13:01:45,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:47,238 INFO L124 PetriNetUnfolderBase]: 9052/17785 cut-off events. [2025-02-06 13:01:47,238 INFO L125 PetriNetUnfolderBase]: For 107319/108172 co-relation queries the response was YES. [2025-02-06 13:01:47,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69351 conditions, 17785 events. 9052/17785 cut-off events. For 107319/108172 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 160150 event pairs, 1153 based on Foata normal form. 189/17896 useless extension candidates. Maximal degree in co-relation 65705. Up to 4984 conditions per place. [2025-02-06 13:01:47,468 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 192 selfloop transitions, 55 changer transitions 0/276 dead transitions. [2025-02-06 13:01:47,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 276 transitions, 4404 flow [2025-02-06 13:01:47,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:01:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:01:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 304 transitions. [2025-02-06 13:01:47,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2025-02-06 13:01:47,469 INFO L175 Difference]: Start difference. First operand has 214 places, 175 transitions, 2511 flow. Second operand 9 states and 304 transitions. [2025-02-06 13:01:47,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 276 transitions, 4404 flow [2025-02-06 13:01:47,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 276 transitions, 4218 flow, removed 15 selfloop flow, removed 17 redundant places. [2025-02-06 13:01:47,691 INFO L231 Difference]: Finished difference. Result has 204 places, 174 transitions, 2437 flow [2025-02-06 13:01:47,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2437, PETRI_PLACES=204, PETRI_TRANSITIONS=174} [2025-02-06 13:01:47,691 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 146 predicate places. [2025-02-06 13:01:47,691 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 2437 flow [2025-02-06 13:01:47,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 28.470588235294116) internal successors, (484), 17 states have internal predecessors, (484), 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 13:01:47,691 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:47,691 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, 1, 1, 1, 1, 1] [2025-02-06 13:01:47,697 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 13:01:47,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:47,892 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:47,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:47,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1733455488, now seen corresponding path program 1 times [2025-02-06 13:01:47,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:47,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630239890] [2025-02-06 13:01:47,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:47,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:47,897 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 13:01:47,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 13:01:47,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:47,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:01:48,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:48,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630239890] [2025-02-06 13:01:48,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630239890] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:48,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073809276] [2025-02-06 13:01:48,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:48,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:48,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:48,038 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 13:01:48,038 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 13:01:48,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 13:01:48,097 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 13:01:48,097 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:48,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:48,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:01:48,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:48,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:01:48,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073809276] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:48,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:48,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2025-02-06 13:01:48,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969830612] [2025-02-06 13:01:48,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:48,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 13:01:48,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:48,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 13:01:48,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2025-02-06 13:01:48,619 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 60 [2025-02-06 13:01:48,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 174 transitions, 2437 flow. Second operand has 23 states, 23 states have (on average 36.608695652173914) internal successors, (842), 23 states have internal predecessors, (842), 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 13:01:48,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:48,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 60 [2025-02-06 13:01:48,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:50,015 INFO L124 PetriNetUnfolderBase]: 4806/12006 cut-off events. [2025-02-06 13:01:50,015 INFO L125 PetriNetUnfolderBase]: For 74997/75425 co-relation queries the response was YES. [2025-02-06 13:01:50,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45913 conditions, 12006 events. 4806/12006 cut-off events. For 74997/75425 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 121760 event pairs, 2219 based on Foata normal form. 112/11884 useless extension candidates. Maximal degree in co-relation 42532. Up to 7001 conditions per place. [2025-02-06 13:01:50,146 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 151 selfloop transitions, 63 changer transitions 2/257 dead transitions. [2025-02-06 13:01:50,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 257 transitions, 3327 flow [2025-02-06 13:01:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 13:01:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 13:01:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 739 transitions. [2025-02-06 13:01:50,148 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6842592592592592 [2025-02-06 13:01:50,148 INFO L175 Difference]: Start difference. First operand has 204 places, 174 transitions, 2437 flow. Second operand 18 states and 739 transitions. [2025-02-06 13:01:50,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 257 transitions, 3327 flow [2025-02-06 13:01:50,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 257 transitions, 3213 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 13:01:50,276 INFO L231 Difference]: Finished difference. Result has 216 places, 187 transitions, 2624 flow [2025-02-06 13:01:50,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2624, PETRI_PLACES=216, PETRI_TRANSITIONS=187} [2025-02-06 13:01:50,277 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 158 predicate places. [2025-02-06 13:01:50,277 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 187 transitions, 2624 flow [2025-02-06 13:01:50,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.608695652173914) internal successors, (842), 23 states have internal predecessors, (842), 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 13:01:50,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:50,277 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, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:50,283 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 13:01:50,477 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,SelfDestructingSolverStorable31 [2025-02-06 13:01:50,478 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:50,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1349350619, now seen corresponding path program 1 times [2025-02-06 13:01:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506395107] [2025-02-06 13:01:50,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:50,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:01:50,489 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:01:50,489 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:50,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:01:50,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506395107] [2025-02-06 13:01:50,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506395107] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:50,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:50,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-02-06 13:01:50,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493053176] [2025-02-06 13:01:50,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:50,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:01:50,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:50,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:01:50,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:01:50,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-02-06 13:01:50,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 187 transitions, 2624 flow. Second operand has 12 states, 12 states have (on average 32.083333333333336) internal successors, (385), 12 states have internal predecessors, (385), 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 13:01:50,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:50,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-02-06 13:01:50,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:52,928 INFO L124 PetriNetUnfolderBase]: 9232/18698 cut-off events. [2025-02-06 13:01:52,928 INFO L125 PetriNetUnfolderBase]: For 103180/103671 co-relation queries the response was YES. [2025-02-06 13:01:53,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74278 conditions, 18698 events. 9232/18698 cut-off events. For 103180/103671 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 170891 event pairs, 3946 based on Foata normal form. 132/18799 useless extension candidates. Maximal degree in co-relation 68229. Up to 9379 conditions per place. [2025-02-06 13:01:53,182 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 321 selfloop transitions, 74 changer transitions 0/408 dead transitions. [2025-02-06 13:01:53,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 408 transitions, 6220 flow [2025-02-06 13:01:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:01:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:01:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 427 transitions. [2025-02-06 13:01:53,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.646969696969697 [2025-02-06 13:01:53,183 INFO L175 Difference]: Start difference. First operand has 216 places, 187 transitions, 2624 flow. Second operand 11 states and 427 transitions. [2025-02-06 13:01:53,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 408 transitions, 6220 flow [2025-02-06 13:01:53,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 408 transitions, 6149 flow, removed 17 selfloop flow, removed 8 redundant places. [2025-02-06 13:01:53,399 INFO L231 Difference]: Finished difference. Result has 223 places, 207 transitions, 3135 flow [2025-02-06 13:01:53,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3135, PETRI_PLACES=223, PETRI_TRANSITIONS=207} [2025-02-06 13:01:53,399 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 165 predicate places. [2025-02-06 13:01:53,400 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 207 transitions, 3135 flow [2025-02-06 13:01:53,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.083333333333336) internal successors, (385), 12 states have internal predecessors, (385), 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 13:01:53,400 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:53,400 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:53,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-02-06 13:01:53,400 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:53,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:53,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1366349545, now seen corresponding path program 3 times [2025-02-06 13:01:53,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:53,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546822345] [2025-02-06 13:01:53,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:01:53,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:53,406 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 7 equivalence classes. [2025-02-06 13:01:53,418 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 27 of 30 statements. [2025-02-06 13:01:53,418 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-06 13:01:53,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-06 13:01:53,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:53,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546822345] [2025-02-06 13:01:53,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546822345] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:01:53,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984974326] [2025-02-06 13:01:53,520 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:01:53,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:01:53,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:01:53,521 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 13:01:53,522 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 13:01:53,568 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 7 equivalence classes. [2025-02-06 13:01:53,605 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 27 of 30 statements. [2025-02-06 13:01:53,605 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-06 13:01:53,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:53,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 13:01:53,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:01:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-06 13:01:53,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:01:53,937 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 18 treesize of output 14 [2025-02-06 13:01:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-06 13:01:53,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984974326] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:01:53,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:01:53,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2025-02-06 13:01:53,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479692753] [2025-02-06 13:01:53,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:01:53,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-06 13:01:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:53,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-06 13:01:53,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2025-02-06 13:01:54,585 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-02-06 13:01:54,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 207 transitions, 3135 flow. Second operand has 30 states, 30 states have (on average 30.733333333333334) internal successors, (922), 30 states have internal predecessors, (922), 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 13:01:54,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:54,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-02-06 13:01:54,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:01:56,831 INFO L124 PetriNetUnfolderBase]: 8588/17419 cut-off events. [2025-02-06 13:01:56,831 INFO L125 PetriNetUnfolderBase]: For 115836/115956 co-relation queries the response was YES. [2025-02-06 13:01:57,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75295 conditions, 17419 events. 8588/17419 cut-off events. For 115836/115956 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 157150 event pairs, 1906 based on Foata normal form. 156/17407 useless extension candidates. Maximal degree in co-relation 67326. Up to 4407 conditions per place. [2025-02-06 13:01:57,088 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 292 selfloop transitions, 90 changer transitions 1/405 dead transitions. [2025-02-06 13:01:57,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 405 transitions, 6017 flow [2025-02-06 13:01:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-06 13:01:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-02-06 13:01:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 636 transitions. [2025-02-06 13:01:57,089 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2025-02-06 13:01:57,089 INFO L175 Difference]: Start difference. First operand has 223 places, 207 transitions, 3135 flow. Second operand 17 states and 636 transitions. [2025-02-06 13:01:57,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 405 transitions, 6017 flow [2025-02-06 13:01:57,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 405 transitions, 5657 flow, removed 31 selfloop flow, removed 6 redundant places. [2025-02-06 13:01:57,412 INFO L231 Difference]: Finished difference. Result has 236 places, 216 transitions, 3283 flow [2025-02-06 13:01:57,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3283, PETRI_PLACES=236, PETRI_TRANSITIONS=216} [2025-02-06 13:01:57,412 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 178 predicate places. [2025-02-06 13:01:57,412 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 216 transitions, 3283 flow [2025-02-06 13:01:57,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 30.733333333333334) internal successors, (922), 30 states have internal predecessors, (922), 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 13:01:57,413 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:01:57,414 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, 1, 1, 1, 1, 1, 1] [2025-02-06 13:01:57,420 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 13:01:57,614 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,SelfDestructingSolverStorable33 [2025-02-06 13:01:57,614 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:01:57,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:01:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2132278109, now seen corresponding path program 1 times [2025-02-06 13:01:57,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:01:57,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013887822] [2025-02-06 13:01:57,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:01:57,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:01:57,620 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:01:57,626 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:01:57,626 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:01:57,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:01:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:01:57,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:01:57,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013887822] [2025-02-06 13:01:57,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013887822] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:01:57,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:01:57,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-02-06 13:01:57,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967868610] [2025-02-06 13:01:57,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:01:57,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:01:57,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:01:57,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:01:57,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:01:58,063 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-02-06 13:01:58,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 216 transitions, 3283 flow. Second operand has 12 states, 12 states have (on average 32.083333333333336) internal successors, (385), 12 states have internal predecessors, (385), 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 13:01:58,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:01:58,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-02-06 13:01:58,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:00,637 INFO L124 PetriNetUnfolderBase]: 10818/21585 cut-off events. [2025-02-06 13:02:00,637 INFO L125 PetriNetUnfolderBase]: For 149594/150041 co-relation queries the response was YES. [2025-02-06 13:02:00,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95533 conditions, 21585 events. 10818/21585 cut-off events. For 149594/150041 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 195785 event pairs, 5390 based on Foata normal form. 192/21745 useless extension candidates. Maximal degree in co-relation 85904. Up to 10729 conditions per place. [2025-02-06 13:02:00,857 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 333 selfloop transitions, 110 changer transitions 9/465 dead transitions. [2025-02-06 13:02:00,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 465 transitions, 8021 flow [2025-02-06 13:02:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:02:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:02:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 430 transitions. [2025-02-06 13:02:00,858 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2025-02-06 13:02:00,858 INFO L175 Difference]: Start difference. First operand has 236 places, 216 transitions, 3283 flow. Second operand 11 states and 430 transitions. [2025-02-06 13:02:00,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 465 transitions, 8021 flow [2025-02-06 13:02:01,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 465 transitions, 7895 flow, removed 23 selfloop flow, removed 7 redundant places. [2025-02-06 13:02:01,189 INFO L231 Difference]: Finished difference. Result has 244 places, 273 transitions, 4723 flow [2025-02-06 13:02:01,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=3185, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4723, PETRI_PLACES=244, PETRI_TRANSITIONS=273} [2025-02-06 13:02:01,190 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 186 predicate places. [2025-02-06 13:02:01,190 INFO L471 AbstractCegarLoop]: Abstraction has has 244 places, 273 transitions, 4723 flow [2025-02-06 13:02:01,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.083333333333336) internal successors, (385), 12 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:01,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:01,190 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, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:01,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2025-02-06 13:02:01,190 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:02:01,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:01,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1892763819, now seen corresponding path program 2 times [2025-02-06 13:02:01,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:01,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061322376] [2025-02-06 13:02:01,191 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:01,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:01,198 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:02:01,200 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 30 statements. [2025-02-06 13:02:01,200 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:02:01,200 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:02:01,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:01,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061322376] [2025-02-06 13:02:01,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061322376] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:01,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:01,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:02:01,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830958139] [2025-02-06 13:02:01,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:01,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:02:01,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:01,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:02:01,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:02:01,464 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-02-06 13:02:01,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 273 transitions, 4723 flow. Second operand has 10 states, 10 states have (on average 32.5) internal successors, (325), 10 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:01,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:01,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-02-06 13:02:01,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:04,698 INFO L124 PetriNetUnfolderBase]: 11418/22928 cut-off events. [2025-02-06 13:02:04,698 INFO L125 PetriNetUnfolderBase]: For 208803/209282 co-relation queries the response was YES. [2025-02-06 13:02:04,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111235 conditions, 22928 events. 11418/22928 cut-off events. For 208803/209282 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 210215 event pairs, 5383 based on Foata normal form. 139/22991 useless extension candidates. Maximal degree in co-relation 99386. Up to 11446 conditions per place. [2025-02-06 13:02:04,982 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 269 selfloop transitions, 188 changer transitions 2/472 dead transitions. [2025-02-06 13:02:04,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 472 transitions, 8939 flow [2025-02-06 13:02:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 364 transitions. [2025-02-06 13:02:04,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2025-02-06 13:02:04,983 INFO L175 Difference]: Start difference. First operand has 244 places, 273 transitions, 4723 flow. Second operand 9 states and 364 transitions. [2025-02-06 13:02:04,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 472 transitions, 8939 flow [2025-02-06 13:02:05,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 472 transitions, 8574 flow, removed 48 selfloop flow, removed 6 redundant places. [2025-02-06 13:02:05,524 INFO L231 Difference]: Finished difference. Result has 252 places, 378 transitions, 7516 flow [2025-02-06 13:02:05,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=4480, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7516, PETRI_PLACES=252, PETRI_TRANSITIONS=378} [2025-02-06 13:02:05,524 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 194 predicate places. [2025-02-06 13:02:05,524 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 378 transitions, 7516 flow [2025-02-06 13:02:05,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.5) internal successors, (325), 10 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:05,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:05,525 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, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:05,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-02-06 13:02:05,525 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:02:05,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1782900283, now seen corresponding path program 3 times [2025-02-06 13:02:05,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:05,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27186361] [2025-02-06 13:02:05,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:05,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:05,531 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:02:05,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 30 statements. [2025-02-06 13:02:05,537 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:02:05,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:02:05,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:05,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27186361] [2025-02-06 13:02:05,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27186361] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:05,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355248157] [2025-02-06 13:02:05,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:05,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:05,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:05,663 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 13:02:05,665 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 13:02:05,719 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:02:05,735 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 30 statements. [2025-02-06 13:02:05,735 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:02:05,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:05,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 13:02:05,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:05,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 13:02:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:02:05,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:05,925 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 13:02:05,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-02-06 13:02:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:02:05,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355248157] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:05,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:05,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-02-06 13:02:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517520122] [2025-02-06 13:02:05,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:05,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:02:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:05,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:02:05,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:02:06,511 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-02-06 13:02:06,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 378 transitions, 7516 flow. Second operand has 17 states, 17 states have (on average 32.1764705882353) internal successors, (547), 17 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:06,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:06,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-02-06 13:02:06,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:10,529 INFO L124 PetriNetUnfolderBase]: 12455/24493 cut-off events. [2025-02-06 13:02:10,529 INFO L125 PetriNetUnfolderBase]: For 251935/252442 co-relation queries the response was YES. [2025-02-06 13:02:10,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126452 conditions, 24493 events. 12455/24493 cut-off events. For 251935/252442 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 223877 event pairs, 5578 based on Foata normal form. 195/24651 useless extension candidates. Maximal degree in co-relation 112190. Up to 11771 conditions per place. [2025-02-06 13:02:10,853 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 402 selfloop transitions, 189 changer transitions 4/608 dead transitions. [2025-02-06 13:02:10,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 608 transitions, 12691 flow [2025-02-06 13:02:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 364 transitions. [2025-02-06 13:02:10,854 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2025-02-06 13:02:10,854 INFO L175 Difference]: Start difference. First operand has 252 places, 378 transitions, 7516 flow. Second operand 9 states and 364 transitions. [2025-02-06 13:02:10,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 608 transitions, 12691 flow [2025-02-06 13:02:11,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 608 transitions, 12023 flow, removed 334 selfloop flow, removed 0 redundant places. [2025-02-06 13:02:11,886 INFO L231 Difference]: Finished difference. Result has 265 places, 452 transitions, 9343 flow [2025-02-06 13:02:11,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=7126, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9343, PETRI_PLACES=265, PETRI_TRANSITIONS=452} [2025-02-06 13:02:11,887 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 207 predicate places. [2025-02-06 13:02:11,887 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 452 transitions, 9343 flow [2025-02-06 13:02:11,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 32.1764705882353) internal successors, (547), 17 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:11,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:11,887 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, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:11,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-06 13:02:12,087 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,SelfDestructingSolverStorable36 [2025-02-06 13:02:12,087 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:02:12,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:12,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1765115199, now seen corresponding path program 4 times [2025-02-06 13:02:12,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:12,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778064307] [2025-02-06 13:02:12,088 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:02:12,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:12,093 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:02:12,097 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 30 statements. [2025-02-06 13:02:12,101 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:02:12,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:02:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778064307] [2025-02-06 13:02:12,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778064307] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273794913] [2025-02-06 13:02:12,169 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:02:12,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:12,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:12,171 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 13:02:12,172 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 13:02:12,218 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:02:12,229 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 30 statements. [2025-02-06 13:02:12,229 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:02:12,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:12,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:02:12,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:12,296 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-06 13:02:12,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2025-02-06 13:02:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:02:12,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:12,358 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-06 13:02:12,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-02-06 13:02:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:02:12,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273794913] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:12,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:12,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-02-06 13:02:12,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980160593] [2025-02-06 13:02:12,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:12,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 13:02:12,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:12,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 13:02:12,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:02:12,985 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2025-02-06 13:02:12,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 452 transitions, 9343 flow. Second operand has 16 states, 16 states have (on average 32.1875) internal successors, (515), 16 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:12,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:12,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2025-02-06 13:02:12,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:17,489 INFO L124 PetriNetUnfolderBase]: 13117/26149 cut-off events. [2025-02-06 13:02:17,489 INFO L125 PetriNetUnfolderBase]: For 248634/249152 co-relation queries the response was YES. [2025-02-06 13:02:17,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134362 conditions, 26149 events. 13117/26149 cut-off events. For 248634/249152 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 242383 event pairs, 5289 based on Foata normal form. 191/26301 useless extension candidates. Maximal degree in co-relation 119760. Up to 11885 conditions per place. [2025-02-06 13:02:17,931 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 324 selfloop transitions, 267 changer transitions 5/609 dead transitions. [2025-02-06 13:02:17,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 609 transitions, 12476 flow [2025-02-06 13:02:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 414 transitions. [2025-02-06 13:02:17,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.69 [2025-02-06 13:02:17,932 INFO L175 Difference]: Start difference. First operand has 265 places, 452 transitions, 9343 flow. Second operand 10 states and 414 transitions. [2025-02-06 13:02:17,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 609 transitions, 12476 flow [2025-02-06 13:02:19,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 609 transitions, 12201 flow, removed 45 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:19,033 INFO L231 Difference]: Finished difference. Result has 275 places, 467 transitions, 10023 flow [2025-02-06 13:02:19,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=9094, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10023, PETRI_PLACES=275, PETRI_TRANSITIONS=467} [2025-02-06 13:02:19,033 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 217 predicate places. [2025-02-06 13:02:19,033 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 467 transitions, 10023 flow [2025-02-06 13:02:19,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 32.1875) internal successors, (515), 16 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:19,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:19,034 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, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:19,039 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 13:02:19,234 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,SelfDestructingSolverStorable37 [2025-02-06 13:02:19,234 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:02:19,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2098474335, now seen corresponding path program 2 times [2025-02-06 13:02:19,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:19,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308236800] [2025-02-06 13:02:19,235 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:19,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:19,239 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:02:19,248 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:02:19,248 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:19,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:19,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308236800] [2025-02-06 13:02:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308236800] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147400753] [2025-02-06 13:02:19,675 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:19,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:19,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:19,677 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 13:02:19,678 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 13:02:19,726 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:02:19,743 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:02:19,745 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:19,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:19,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 13:02:19,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:19,902 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-06 13:02:19,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2025-02-06 13:02:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:02:19,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:20,031 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-02-06 13:02:20,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-02-06 13:02:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:02:20,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147400753] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:20,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:20,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2025-02-06 13:02:20,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497643183] [2025-02-06 13:02:20,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:20,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-06 13:02:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:20,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-06 13:02:20,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2025-02-06 13:02:22,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2025-02-06 13:02:22,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 467 transitions, 10023 flow. Second operand has 30 states, 30 states have (on average 26.266666666666666) internal successors, (788), 30 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:22,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:22,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2025-02-06 13:02:22,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:29,405 INFO L124 PetriNetUnfolderBase]: 17525/33477 cut-off events. [2025-02-06 13:02:29,405 INFO L125 PetriNetUnfolderBase]: For 319328/319737 co-relation queries the response was YES. [2025-02-06 13:02:29,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169432 conditions, 33477 events. 17525/33477 cut-off events. For 319328/319737 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 304795 event pairs, 1450 based on Foata normal form. 146/33617 useless extension candidates. Maximal degree in co-relation 152469. Up to 12954 conditions per place. [2025-02-06 13:02:30,068 INFO L140 encePairwiseOnDemand]: 43/60 looper letters, 656 selfloop transitions, 238 changer transitions 20/921 dead transitions. [2025-02-06 13:02:30,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 921 transitions, 17600 flow [2025-02-06 13:02:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-06 13:02:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-02-06 13:02:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 944 transitions. [2025-02-06 13:02:30,070 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.542528735632184 [2025-02-06 13:02:30,070 INFO L175 Difference]: Start difference. First operand has 275 places, 467 transitions, 10023 flow. Second operand 29 states and 944 transitions. [2025-02-06 13:02:30,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 921 transitions, 17600 flow [2025-02-06 13:02:32,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 921 transitions, 17044 flow, removed 18 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:32,141 INFO L231 Difference]: Finished difference. Result has 307 places, 512 transitions, 10819 flow [2025-02-06 13:02:32,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=9612, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10819, PETRI_PLACES=307, PETRI_TRANSITIONS=512} [2025-02-06 13:02:32,141 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 249 predicate places. [2025-02-06 13:02:32,141 INFO L471 AbstractCegarLoop]: Abstraction has has 307 places, 512 transitions, 10819 flow [2025-02-06 13:02:32,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 26.266666666666666) internal successors, (788), 30 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:32,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:32,142 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, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:32,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0