./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-5.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/unroll-5.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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:13:10,088 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:13:10,137 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:13:10,144 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:13:10,144 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:13:10,166 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:13:10,168 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:13:10,168 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:13:10,168 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:13:10,169 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:13:10,169 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:13:10,169 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:13:10,170 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:13:10,170 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:13:10,170 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:13:10,170 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:13:10,170 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:13:10,170 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:13:10,171 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:13:10,172 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:13:10,172 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:13:10,172 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:13:10,172 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:13:10,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:13:10,172 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:13:10,173 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:13:10,173 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:13:10,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:13:10,173 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:13:10,173 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:13:10,173 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:13:10,173 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:13:10,173 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 -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2025-02-06 13:13:10,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:13:10,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:13:10,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:13:10,383 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:13:10,384 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:13:10,384 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-5.wvr.c [2025-02-06 13:13:11,480 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/15ab418d5/c2487f540eb5470cacb2fd0d2f6e6d53/FLAGa3d9f7365 [2025-02-06 13:13:11,693 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:13:11,694 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/unroll-5.wvr.c [2025-02-06 13:13:11,714 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/15ab418d5/c2487f540eb5470cacb2fd0d2f6e6d53/FLAGa3d9f7365 [2025-02-06 13:13:11,734 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/15ab418d5/c2487f540eb5470cacb2fd0d2f6e6d53 [2025-02-06 13:13:11,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:13:11,737 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:13:11,737 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:13:11,738 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:13:11,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:13:11,741 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:11,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fefd4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11, skipping insertion in model container [2025-02-06 13:13:11,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:11,751 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:13:11,877 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 13:13:11,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:13:11,894 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:13:11,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:13:11,928 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:13:11,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11 WrapperNode [2025-02-06 13:13:11,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:13:11,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:13:11,931 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:13:11,931 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:13:11,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:11,941 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:11,959 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 150 [2025-02-06 13:13:11,962 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:13:11,963 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:13:11,963 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:13:11,963 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:13:11,969 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:11,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:11,971 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:11,993 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 13:13:11,993 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:11,994 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:12,002 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:12,003 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:12,008 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:12,008 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:12,010 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:13:12,010 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:13:12,011 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:13:12,011 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:13:12,011 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (1/1) ... [2025-02-06 13:13:12,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:13:12,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:12,044 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 13:13:12,045 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 13:13:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:13:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:13:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:13:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:13:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:13:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:13:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:13:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:13:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:13:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:13:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:13:12,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:13:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:13:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:13:12,063 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 13:13:12,122 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:13:12,123 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:13:12,374 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:13:12,374 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:13:12,526 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:13:12,526 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:13:12,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:13:12 BoogieIcfgContainer [2025-02-06 13:13:12,526 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:13:12,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:13:12,528 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:13:12,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:13:12,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:13:11" (1/3) ... [2025-02-06 13:13:12,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdd9c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:13:12, skipping insertion in model container [2025-02-06 13:13:12,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:13:11" (2/3) ... [2025-02-06 13:13:12,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdd9c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:13:12, skipping insertion in model container [2025-02-06 13:13:12,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:13:12" (3/3) ... [2025-02-06 13:13:12,537 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2025-02-06 13:13:12,547 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:13:12,548 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-5.wvr.c that has 3 procedures, 41 locations, 1 initial locations, 3 loop locations, and 16 error locations. [2025-02-06 13:13:12,548 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:13:12,631 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:13:12,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 43 transitions, 100 flow [2025-02-06 13:13:12,683 INFO L124 PetriNetUnfolderBase]: 3/41 cut-off events. [2025-02-06 13:13:12,686 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:13:12,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 3/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-02-06 13:13:12,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 43 transitions, 100 flow [2025-02-06 13:13:12,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 40 transitions, 92 flow [2025-02-06 13:13:12,699 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:13:12,713 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;@41846933, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:13:12,715 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2025-02-06 13:13:12,717 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:13:12,717 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:13:12,717 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:13:12,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:12,719 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:13:12,720 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:12,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash 451936, now seen corresponding path program 1 times [2025-02-06 13:13:12,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:12,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042945567] [2025-02-06 13:13:12,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:12,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:12,806 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:13:12,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:13:12,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:12,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:12,924 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 13:13:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:12,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042945567] [2025-02-06 13:13:12,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042945567] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:12,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:12,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:13:12,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739565445] [2025-02-06 13:13:12,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:12,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:13:12,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:12,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:13:12,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:13:12,977 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-02-06 13:13:12,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:12,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:12,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-02-06 13:13:12,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:13,098 INFO L124 PetriNetUnfolderBase]: 114/291 cut-off events. [2025-02-06 13:13:13,099 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-02-06 13:13:13,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 291 events. 114/291 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1355 event pairs, 86 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 444. Up to 197 conditions per place. [2025-02-06 13:13:13,103 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 21 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2025-02-06 13:13:13,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 132 flow [2025-02-06 13:13:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:13:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:13:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2025-02-06 13:13:13,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2025-02-06 13:13:13,115 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 92 flow. Second operand 3 states and 76 transitions. [2025-02-06 13:13:13,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 132 flow [2025-02-06 13:13:13,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:13,120 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 82 flow [2025-02-06 13:13:13,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2025-02-06 13:13:13,127 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2025-02-06 13:13:13,127 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 82 flow [2025-02-06 13:13:13,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:13,127 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:13,128 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:13:13,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:13:13,128 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:13,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:13,128 INFO L85 PathProgramCache]: Analyzing trace with hash 451937, now seen corresponding path program 1 times [2025-02-06 13:13:13,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:13,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073588249] [2025-02-06 13:13:13,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:13,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:13,137 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:13:13,159 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:13:13,162 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:13,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:13,348 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 13:13:13,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:13,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073588249] [2025-02-06 13:13:13,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073588249] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:13,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:13,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:13:13,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524784560] [2025-02-06 13:13:13,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:13,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:13:13,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:13,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:13:13,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:13:13,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-02-06 13:13:13,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:13,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:13,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-02-06 13:13:13,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:13,528 INFO L124 PetriNetUnfolderBase]: 115/294 cut-off events. [2025-02-06 13:13:13,529 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-06 13:13:13,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 294 events. 115/294 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1362 event pairs, 86 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 486. Up to 202 conditions per place. [2025-02-06 13:13:13,532 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 24 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2025-02-06 13:13:13,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 144 flow [2025-02-06 13:13:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:13:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:13:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2025-02-06 13:13:13,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2025-02-06 13:13:13,535 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 82 flow. Second operand 3 states and 79 transitions. [2025-02-06 13:13:13,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 144 flow [2025-02-06 13:13:13,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:13,537 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 97 flow [2025-02-06 13:13:13,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2025-02-06 13:13:13,538 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2025-02-06 13:13:13,538 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 97 flow [2025-02-06 13:13:13,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:13,539 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:13,539 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:13:13,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:13:13,539 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:13,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:13,539 INFO L85 PathProgramCache]: Analyzing trace with hash 434326139, now seen corresponding path program 1 times [2025-02-06 13:13:13,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259058813] [2025-02-06 13:13:13,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:13,550 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:13:13,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:13:13,571 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:13,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:13,844 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 13:13:13,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259058813] [2025-02-06 13:13:13,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259058813] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107478497] [2025-02-06 13:13:13,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:13,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:13,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:13,848 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 13:13:13,849 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 13:13:13,895 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:13:13,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:13:13,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:13,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:13,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:13:13,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:13,956 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 13:13:14,116 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 13:13:14,116 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:14,193 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 13:13:14,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107478497] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:14,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:14,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:13:14,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216671292] [2025-02-06 13:13:14,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:14,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:13:14,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:14,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:13:14,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:13:14,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-02-06 13:13:14,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 97 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:14,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:14,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-02-06 13:13:14,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:14,569 INFO L124 PetriNetUnfolderBase]: 115/293 cut-off events. [2025-02-06 13:13:14,569 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-06 13:13:14,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 293 events. 115/293 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1357 event pairs, 86 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 486. Up to 198 conditions per place. [2025-02-06 13:13:14,573 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 20 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2025-02-06 13:13:14,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 147 flow [2025-02-06 13:13:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2025-02-06 13:13:14,575 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5209302325581395 [2025-02-06 13:13:14,576 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 97 flow. Second operand 5 states and 112 transitions. [2025-02-06 13:13:14,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 147 flow [2025-02-06 13:13:14,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:13:14,577 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 110 flow [2025-02-06 13:13:14,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2025-02-06 13:13:14,578 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2025-02-06 13:13:14,578 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 110 flow [2025-02-06 13:13:14,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:14,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:14,578 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:13:14,587 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 13:13:14,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:14,780 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:14,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash 581700652, now seen corresponding path program 1 times [2025-02-06 13:13:14,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:14,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316860299] [2025-02-06 13:13:14,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:14,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:14,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:13:14,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:13:14,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:14,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:14,922 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 13:13:14,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:14,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316860299] [2025-02-06 13:13:14,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316860299] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:14,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:14,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:13:14,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938914368] [2025-02-06 13:13:14,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:14,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:13:14,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:14,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:13:14,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:13:14,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2025-02-06 13:13:14,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:14,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:14,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2025-02-06 13:13:14,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:15,023 INFO L124 PetriNetUnfolderBase]: 115/248 cut-off events. [2025-02-06 13:13:15,023 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 13:13:15,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 248 events. 115/248 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 919 event pairs, 86 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 449. Up to 197 conditions per place. [2025-02-06 13:13:15,025 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 23 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2025-02-06 13:13:15,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 150 flow [2025-02-06 13:13:15,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:13:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:13:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2025-02-06 13:13:15,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2025-02-06 13:13:15,027 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 110 flow. Second operand 4 states and 73 transitions. [2025-02-06 13:13:15,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 150 flow [2025-02-06 13:13:15,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 137 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-06 13:13:15,029 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 91 flow [2025-02-06 13:13:15,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2025-02-06 13:13:15,030 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2025-02-06 13:13:15,031 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 91 flow [2025-02-06 13:13:15,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:15,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:15,031 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:13:15,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:13:15,032 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:15,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 581700653, now seen corresponding path program 1 times [2025-02-06 13:13:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:15,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159133726] [2025-02-06 13:13:15,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:15,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:13:15,041 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:13:15,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:15,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:15,092 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 13:13:15,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:15,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159133726] [2025-02-06 13:13:15,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159133726] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:15,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:15,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:13:15,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485480784] [2025-02-06 13:13:15,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:15,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:13:15,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:15,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:13:15,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:13:15,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:15,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:15,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:15,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:15,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:15,164 INFO L124 PetriNetUnfolderBase]: 114/247 cut-off events. [2025-02-06 13:13:15,164 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-06 13:13:15,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 247 events. 114/247 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 910 event pairs, 86 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 441. Up to 200 conditions per place. [2025-02-06 13:13:15,166 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 23 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2025-02-06 13:13:15,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 136 flow [2025-02-06 13:13:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:13:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:13:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2025-02-06 13:13:15,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2025-02-06 13:13:15,168 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 91 flow. Second operand 3 states and 80 transitions. [2025-02-06 13:13:15,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 136 flow [2025-02-06 13:13:15,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 133 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:15,169 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 87 flow [2025-02-06 13:13:15,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2025-02-06 13:13:15,170 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2025-02-06 13:13:15,170 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 87 flow [2025-02-06 13:13:15,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:15,170 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:15,170 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:15,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:13:15,170 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:15,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:15,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1723508525, now seen corresponding path program 1 times [2025-02-06 13:13:15,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:15,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425915624] [2025-02-06 13:13:15,173 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:15,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:15,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:13:15,186 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:13:15,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:15,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:15,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:15,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425915624] [2025-02-06 13:13:15,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425915624] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:15,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729124657] [2025-02-06 13:13:15,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:15,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:15,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:15,356 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 13:13:15,364 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 13:13:15,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:13:15,411 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:13:15,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:15,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:15,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:13:15,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:15,419 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 13:13:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:15,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:15,580 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 13:13:15,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729124657] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:15,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:13:15,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2025-02-06 13:13:15,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896824132] [2025-02-06 13:13:15,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:15,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:13:15,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:15,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:13:15,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:13:15,621 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-02-06 13:13:15,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 87 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:15,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:15,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-02-06 13:13:15,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:15,716 INFO L124 PetriNetUnfolderBase]: 226/440 cut-off events. [2025-02-06 13:13:15,717 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 13:13:15,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 440 events. 226/440 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1908 event pairs, 86 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 843. Up to 213 conditions per place. [2025-02-06 13:13:15,719 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 40 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2025-02-06 13:13:15,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 210 flow [2025-02-06 13:13:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:13:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:13:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2025-02-06 13:13:15,720 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2025-02-06 13:13:15,720 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 87 flow. Second operand 4 states and 110 transitions. [2025-02-06 13:13:15,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 210 flow [2025-02-06 13:13:15,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:15,722 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 97 flow [2025-02-06 13:13:15,722 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2025-02-06 13:13:15,722 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2025-02-06 13:13:15,723 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 97 flow [2025-02-06 13:13:15,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:15,723 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:15,723 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:15,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:15,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:15,927 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:15,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1565699094, now seen corresponding path program 1 times [2025-02-06 13:13:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:15,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503569326] [2025-02-06 13:13:15,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:15,933 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:13:15,938 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:13:15,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:15,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:16,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503569326] [2025-02-06 13:13:16,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503569326] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038666138] [2025-02-06 13:13:16,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:16,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:16,102 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 13:13:16,102 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 13:13:16,137 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:13:16,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:13:16,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:16,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:16,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:13:16,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:16,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:16,333 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 36 treesize of output 32 [2025-02-06 13:13:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:16,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038666138] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:16,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:16,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-02-06 13:13:16,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120671240] [2025-02-06 13:13:16,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:16,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:13:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:16,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:13:16,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:13:16,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-02-06 13:13:16,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 97 flow. Second operand has 17 states, 17 states have (on average 18.764705882352942) internal successors, (319), 17 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:16,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:16,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-02-06 13:13:16,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:17,167 INFO L124 PetriNetUnfolderBase]: 464/979 cut-off events. [2025-02-06 13:13:17,167 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2025-02-06 13:13:17,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966 conditions, 979 events. 464/979 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5438 event pairs, 243 based on Foata normal form. 0/840 useless extension candidates. Maximal degree in co-relation 982. Up to 393 conditions per place. [2025-02-06 13:13:17,171 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 69 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2025-02-06 13:13:17,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 86 transitions, 393 flow [2025-02-06 13:13:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:13:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:13:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2025-02-06 13:13:17,172 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-02-06 13:13:17,172 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 97 flow. Second operand 8 states and 215 transitions. [2025-02-06 13:13:17,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 86 transitions, 393 flow [2025-02-06 13:13:17,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 86 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:13:17,173 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 180 flow [2025-02-06 13:13:17,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=180, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2025-02-06 13:13:17,174 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2025-02-06 13:13:17,174 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 180 flow [2025-02-06 13:13:17,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.764705882352942) internal successors, (319), 17 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:17,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:17,174 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:17,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 13:13:17,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:17,375 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:17,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1530368121, now seen corresponding path program 1 times [2025-02-06 13:13:17,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:17,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074606094] [2025-02-06 13:13:17,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:17,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:17,385 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:13:17,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:13:17,397 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:17,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:17,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:17,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074606094] [2025-02-06 13:13:17,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074606094] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:17,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336074549] [2025-02-06 13:13:17,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:17,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:17,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:17,536 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 13:13:17,537 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 13:13:17,582 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:13:17,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:13:17,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:17,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:17,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:13:17,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:17,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:17,715 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 29 treesize of output 25 [2025-02-06 13:13:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:17,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336074549] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:17,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:17,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:13:17,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052446019] [2025-02-06 13:13:17,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:17,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:13:17,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:17,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:13:17,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:13:17,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-02-06 13:13:17,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 180 flow. Second operand has 11 states, 11 states have (on average 15.727272727272727) internal successors, (173), 11 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 13:13:17,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:17,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-02-06 13:13:17,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:18,018 INFO L124 PetriNetUnfolderBase]: 767/1349 cut-off events. [2025-02-06 13:13:18,018 INFO L125 PetriNetUnfolderBase]: For 810/858 co-relation queries the response was YES. [2025-02-06 13:13:18,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3335 conditions, 1349 events. 767/1349 cut-off events. For 810/858 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6329 event pairs, 162 based on Foata normal form. 32/1189 useless extension candidates. Maximal degree in co-relation 2075. Up to 977 conditions per place. [2025-02-06 13:13:18,025 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 47 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2025-02-06 13:13:18,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 338 flow [2025-02-06 13:13:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2025-02-06 13:13:18,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2025-02-06 13:13:18,026 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 180 flow. Second operand 5 states and 107 transitions. [2025-02-06 13:13:18,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 338 flow [2025-02-06 13:13:18,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:13:18,028 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 202 flow [2025-02-06 13:13:18,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2025-02-06 13:13:18,029 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2025-02-06 13:13:18,029 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 202 flow [2025-02-06 13:13:18,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.727272727272727) internal successors, (173), 11 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 13:13:18,029 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:18,029 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:18,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:18,235 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,SelfDestructingSolverStorable7 [2025-02-06 13:13:18,235 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:18,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:18,236 INFO L85 PathProgramCache]: Analyzing trace with hash 196771987, now seen corresponding path program 1 times [2025-02-06 13:13:18,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:18,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367724743] [2025-02-06 13:13:18,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:18,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:18,241 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:13:18,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:13:18,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:18,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:18,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:18,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367724743] [2025-02-06 13:13:18,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367724743] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:18,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27206936] [2025-02-06 13:13:18,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:18,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:18,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:18,358 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 13:13:18,359 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 13:13:18,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:13:18,403 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:13:18,403 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:18,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:18,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:13:18,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:18,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:18,509 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 29 treesize of output 25 [2025-02-06 13:13:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:18,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27206936] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:18,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:18,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-02-06 13:13:18,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654036570] [2025-02-06 13:13:18,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:18,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:13:18,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:18,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:13:18,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:13:18,779 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-02-06 13:13:18,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 202 flow. Second operand has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:18,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:18,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-02-06 13:13:18,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:19,037 INFO L124 PetriNetUnfolderBase]: 859/1498 cut-off events. [2025-02-06 13:13:19,038 INFO L125 PetriNetUnfolderBase]: For 999/1057 co-relation queries the response was YES. [2025-02-06 13:13:19,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3831 conditions, 1498 events. 859/1498 cut-off events. For 999/1057 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6982 event pairs, 395 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 2242. Up to 1153 conditions per place. [2025-02-06 13:13:19,045 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 64 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2025-02-06 13:13:19,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 75 transitions, 446 flow [2025-02-06 13:13:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:13:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:13:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2025-02-06 13:13:19,048 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2025-02-06 13:13:19,048 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 202 flow. Second operand 7 states and 161 transitions. [2025-02-06 13:13:19,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 75 transitions, 446 flow [2025-02-06 13:13:19,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 435 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-02-06 13:13:19,052 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 225 flow [2025-02-06 13:13:19,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2025-02-06 13:13:19,053 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2025-02-06 13:13:19,053 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 225 flow [2025-02-06 13:13:19,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:19,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:19,053 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:19,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:13:19,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:19,257 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:19,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash 394868156, now seen corresponding path program 2 times [2025-02-06 13:13:19,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:19,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812624467] [2025-02-06 13:13:19,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:19,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:19,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-06 13:13:19,269 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 12 statements. [2025-02-06 13:13:19,269 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:13:19,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:19,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:19,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812624467] [2025-02-06 13:13:19,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812624467] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:19,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217235622] [2025-02-06 13:13:19,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:19,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:19,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:19,373 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 13:13:19,374 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 13:13:19,409 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-06 13:13:19,425 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 12 statements. [2025-02-06 13:13:19,425 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:13:19,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:19,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:13:19,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:19,440 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 13:13:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:19,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:19,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217235622] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:19,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:19,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:13:19,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740284684] [2025-02-06 13:13:19,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:19,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:13:19,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:19,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:13:19,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:13:19,867 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-02-06 13:13:19,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 225 flow. Second operand has 11 states, 11 states have (on average 19.727272727272727) internal successors, (217), 11 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:19,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:19,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-02-06 13:13:19,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:20,042 INFO L124 PetriNetUnfolderBase]: 629/1225 cut-off events. [2025-02-06 13:13:20,042 INFO L125 PetriNetUnfolderBase]: For 518/518 co-relation queries the response was YES. [2025-02-06 13:13:20,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3124 conditions, 1225 events. 629/1225 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6431 event pairs, 362 based on Foata normal form. 0/1161 useless extension candidates. Maximal degree in co-relation 1884. Up to 814 conditions per place. [2025-02-06 13:13:20,051 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 40 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2025-02-06 13:13:20,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 368 flow [2025-02-06 13:13:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2025-02-06 13:13:20,055 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2025-02-06 13:13:20,055 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 225 flow. Second operand 5 states and 120 transitions. [2025-02-06 13:13:20,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 56 transitions, 368 flow [2025-02-06 13:13:20,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 351 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:13:20,058 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 224 flow [2025-02-06 13:13:20,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2025-02-06 13:13:20,059 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2025-02-06 13:13:20,059 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 224 flow [2025-02-06 13:13:20,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.727272727272727) internal successors, (217), 11 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:20,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:20,059 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:20,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:20,263 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,SelfDestructingSolverStorable9 [2025-02-06 13:13:20,263 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:20,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:20,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1739248723, now seen corresponding path program 2 times [2025-02-06 13:13:20,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:20,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191979601] [2025-02-06 13:13:20,264 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:20,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:20,268 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-06 13:13:20,275 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 13 statements. [2025-02-06 13:13:20,275 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:13:20,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:20,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:20,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191979601] [2025-02-06 13:13:20,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191979601] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:20,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:20,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:13:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196860338] [2025-02-06 13:13:20,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:20,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:13:20,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:20,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:13:20,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:13:20,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-02-06 13:13:20,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:20,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:20,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-02-06 13:13:20,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:20,625 INFO L124 PetriNetUnfolderBase]: 675/1183 cut-off events. [2025-02-06 13:13:20,625 INFO L125 PetriNetUnfolderBase]: For 1459/1459 co-relation queries the response was YES. [2025-02-06 13:13:20,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3323 conditions, 1183 events. 675/1183 cut-off events. For 1459/1459 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5238 event pairs, 322 based on Foata normal form. 96/1183 useless extension candidates. Maximal degree in co-relation 1927. Up to 684 conditions per place. [2025-02-06 13:13:20,630 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2025-02-06 13:13:20,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 361 flow [2025-02-06 13:13:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2025-02-06 13:13:20,632 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2025-02-06 13:13:20,632 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 224 flow. Second operand 5 states and 99 transitions. [2025-02-06 13:13:20,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 361 flow [2025-02-06 13:13:20,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 329 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:20,636 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 204 flow [2025-02-06 13:13:20,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2025-02-06 13:13:20,637 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2025-02-06 13:13:20,638 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 204 flow [2025-02-06 13:13:20,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:20,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:20,639 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:20,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 13:13:20,639 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:20,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash -916332715, now seen corresponding path program 1 times [2025-02-06 13:13:20,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:20,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633577940] [2025-02-06 13:13:20,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:20,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:20,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:13:20,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:13:20,648 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:20,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:20,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:20,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633577940] [2025-02-06 13:13:20,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633577940] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:20,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:20,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:13:20,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78253499] [2025-02-06 13:13:20,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:20,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:13:20,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:20,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:13:20,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:13:20,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:20,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:20,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:20,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:20,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:20,778 INFO L124 PetriNetUnfolderBase]: 629/1133 cut-off events. [2025-02-06 13:13:20,778 INFO L125 PetriNetUnfolderBase]: For 933/933 co-relation queries the response was YES. [2025-02-06 13:13:20,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3035 conditions, 1133 events. 629/1133 cut-off events. For 933/933 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5135 event pairs, 174 based on Foata normal form. 2/1071 useless extension candidates. Maximal degree in co-relation 1810. Up to 913 conditions per place. [2025-02-06 13:13:20,783 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 43 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2025-02-06 13:13:20,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 343 flow [2025-02-06 13:13:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:13:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:13:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2025-02-06 13:13:20,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7054263565891473 [2025-02-06 13:13:20,784 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 204 flow. Second operand 3 states and 91 transitions. [2025-02-06 13:13:20,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 343 flow [2025-02-06 13:13:20,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 325 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:20,787 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 221 flow [2025-02-06 13:13:20,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2025-02-06 13:13:20,788 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2025-02-06 13:13:20,789 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 221 flow [2025-02-06 13:13:20,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:20,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:20,790 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:20,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 13:13:20,790 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:20,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1143518206, now seen corresponding path program 1 times [2025-02-06 13:13:20,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:20,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496932067] [2025-02-06 13:13:20,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:20,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:20,794 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:13:20,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:13:20,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:20,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:20,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:20,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496932067] [2025-02-06 13:13:20,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496932067] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:20,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365364679] [2025-02-06 13:13:20,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:20,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:20,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:20,920 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 13:13:20,922 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 13:13:20,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:13:20,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:13:20,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:20,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:20,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:13:20,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:21,087 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:21,157 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 36 treesize of output 32 [2025-02-06 13:13:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:21,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365364679] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:21,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:21,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-02-06 13:13:21,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203581914] [2025-02-06 13:13:21,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:21,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:13:21,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:21,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:13:21,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:13:21,495 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-02-06 13:13:21,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 221 flow. Second operand has 17 states, 17 states have (on average 15.823529411764707) internal successors, (269), 17 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:21,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:21,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-02-06 13:13:21,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:21,720 INFO L124 PetriNetUnfolderBase]: 652/1140 cut-off events. [2025-02-06 13:13:21,720 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2025-02-06 13:13:21,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 1140 events. 652/1140 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4954 event pairs, 320 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 1887. Up to 508 conditions per place. [2025-02-06 13:13:21,725 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 69 selfloop transitions, 11 changer transitions 1/82 dead transitions. [2025-02-06 13:13:21,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 512 flow [2025-02-06 13:13:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:13:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:13:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2025-02-06 13:13:21,726 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2025-02-06 13:13:21,726 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 221 flow. Second operand 8 states and 176 transitions. [2025-02-06 13:13:21,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 512 flow [2025-02-06 13:13:21,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 82 transitions, 503 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-02-06 13:13:21,729 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 256 flow [2025-02-06 13:13:21,729 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2025-02-06 13:13:21,730 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2025-02-06 13:13:21,730 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 256 flow [2025-02-06 13:13:21,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.823529411764707) internal successors, (269), 17 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:21,730 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:21,730 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:21,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:21,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:21,931 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:21,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash -124944088, now seen corresponding path program 2 times [2025-02-06 13:13:21,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:21,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675922342] [2025-02-06 13:13:21,931 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:21,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:21,937 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:21,940 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 18 statements. [2025-02-06 13:13:21,940 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:13:21,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:22,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:22,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675922342] [2025-02-06 13:13:22,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675922342] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:22,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065329391] [2025-02-06 13:13:22,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:22,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:22,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:22,048 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 13:13:22,050 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 13:13:22,085 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:22,098 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 18 statements. [2025-02-06 13:13:22,099 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:13:22,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:22,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:13:22,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:22,116 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 13:13:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:22,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:22,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065329391] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:22,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:22,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2025-02-06 13:13:22,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315278667] [2025-02-06 13:13:22,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:22,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:13:22,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:22,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:13:22,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:13:22,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-02-06 13:13:22,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 256 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:22,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:22,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-02-06 13:13:22,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:22,806 INFO L124 PetriNetUnfolderBase]: 629/1101 cut-off events. [2025-02-06 13:13:22,806 INFO L125 PetriNetUnfolderBase]: For 1313/1313 co-relation queries the response was YES. [2025-02-06 13:13:22,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3103 conditions, 1101 events. 629/1101 cut-off events. For 1313/1313 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4749 event pairs, 196 based on Foata normal form. 16/1117 useless extension candidates. Maximal degree in co-relation 1854. Up to 640 conditions per place. [2025-02-06 13:13:22,811 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 44 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2025-02-06 13:13:22,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 426 flow [2025-02-06 13:13:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2025-02-06 13:13:22,812 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2025-02-06 13:13:22,812 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 256 flow. Second operand 5 states and 95 transitions. [2025-02-06 13:13:22,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 426 flow [2025-02-06 13:13:22,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 409 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-06 13:13:22,815 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 250 flow [2025-02-06 13:13:22,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2025-02-06 13:13:22,817 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2025-02-06 13:13:22,817 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 250 flow [2025-02-06 13:13:22,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:22,817 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:22,817 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:22,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 13:13:23,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:23,021 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:23,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:23,022 INFO L85 PathProgramCache]: Analyzing trace with hash -628786694, now seen corresponding path program 1 times [2025-02-06 13:13:23,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:23,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074643617] [2025-02-06 13:13:23,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:23,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:13:23,035 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:23,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:23,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:23,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:23,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074643617] [2025-02-06 13:13:23,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074643617] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:23,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:23,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:13:23,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067780149] [2025-02-06 13:13:23,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:23,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:13:23,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:23,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:13:23,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:13:23,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:23,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 250 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:23,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:23,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:23,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:23,277 INFO L124 PetriNetUnfolderBase]: 641/1149 cut-off events. [2025-02-06 13:13:23,277 INFO L125 PetriNetUnfolderBase]: For 1438/1438 co-relation queries the response was YES. [2025-02-06 13:13:23,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3442 conditions, 1149 events. 641/1149 cut-off events. For 1438/1438 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5330 event pairs, 94 based on Foata normal form. 58/1207 useless extension candidates. Maximal degree in co-relation 2114. Up to 594 conditions per place. [2025-02-06 13:13:23,283 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 75 selfloop transitions, 16 changer transitions 1/93 dead transitions. [2025-02-06 13:13:23,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 674 flow [2025-02-06 13:13:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:13:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:13:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2025-02-06 13:13:23,284 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2025-02-06 13:13:23,284 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 250 flow. Second operand 7 states and 196 transitions. [2025-02-06 13:13:23,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 674 flow [2025-02-06 13:13:23,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 640 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:23,288 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 388 flow [2025-02-06 13:13:23,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2025-02-06 13:13:23,290 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2025-02-06 13:13:23,290 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 388 flow [2025-02-06 13:13:23,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:23,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:23,290 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:23,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:13:23,290 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:23,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:23,291 INFO L85 PathProgramCache]: Analyzing trace with hash 777811140, now seen corresponding path program 2 times [2025-02-06 13:13:23,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:23,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508510135] [2025-02-06 13:13:23,291 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:23,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:23,295 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:23,308 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:23,309 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:23,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:23,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:23,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508510135] [2025-02-06 13:13:23,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508510135] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:23,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534530608] [2025-02-06 13:13:23,479 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:23,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:23,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:23,483 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 13:13:23,489 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 13:13:23,526 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:23,539 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:23,539 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:23,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:23,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:13:23,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:23,625 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:13:23,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534530608] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:23,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:13:23,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2025-02-06 13:13:23,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524645976] [2025-02-06 13:13:23,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:23,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:13:23,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:23,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:13:23,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:13:23,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:23,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 388 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:23,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:23,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:23,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:23,767 INFO L124 PetriNetUnfolderBase]: 633/1153 cut-off events. [2025-02-06 13:13:23,767 INFO L125 PetriNetUnfolderBase]: For 2851/2851 co-relation queries the response was YES. [2025-02-06 13:13:23,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4118 conditions, 1153 events. 633/1153 cut-off events. For 2851/2851 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5373 event pairs, 271 based on Foata normal form. 12/1165 useless extension candidates. Maximal degree in co-relation 2663. Up to 838 conditions per place. [2025-02-06 13:13:23,772 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 64 selfloop transitions, 10 changer transitions 5/80 dead transitions. [2025-02-06 13:13:23,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 80 transitions, 723 flow [2025-02-06 13:13:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2025-02-06 13:13:23,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2025-02-06 13:13:23,773 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 388 flow. Second operand 5 states and 135 transitions. [2025-02-06 13:13:23,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 80 transitions, 723 flow [2025-02-06 13:13:23,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 701 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-02-06 13:13:23,778 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 421 flow [2025-02-06 13:13:23,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=421, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2025-02-06 13:13:23,780 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2025-02-06 13:13:23,780 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 421 flow [2025-02-06 13:13:23,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:23,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:23,780 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:23,788 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 13:13:23,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:23,985 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:23,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash 849194470, now seen corresponding path program 3 times [2025-02-06 13:13:23,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:23,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643635913] [2025-02-06 13:13:23,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:13:23,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:23,991 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:24,002 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:24,003 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:13:24,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:24,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643635913] [2025-02-06 13:13:24,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643635913] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:24,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402044952] [2025-02-06 13:13:24,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:13:24,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:24,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:24,144 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 13:13:24,151 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 13:13:24,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:24,197 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:24,197 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:13:24,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:24,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:13:24,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:24,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:24,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402044952] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:24,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:24,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 12 [2025-02-06 13:13:24,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104575916] [2025-02-06 13:13:24,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:24,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:13:24,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:24,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:13:24,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:13:24,272 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:24,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 421 flow. Second operand has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:24,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:24,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:24,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:24,879 INFO L124 PetriNetUnfolderBase]: 849/1531 cut-off events. [2025-02-06 13:13:24,879 INFO L125 PetriNetUnfolderBase]: For 4763/4763 co-relation queries the response was YES. [2025-02-06 13:13:24,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6061 conditions, 1531 events. 849/1531 cut-off events. For 4763/4763 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7736 event pairs, 192 based on Foata normal form. 18/1549 useless extension candidates. Maximal degree in co-relation 3750. Up to 582 conditions per place. [2025-02-06 13:13:24,892 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 78 selfloop transitions, 62 changer transitions 3/144 dead transitions. [2025-02-06 13:13:24,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 144 transitions, 1329 flow [2025-02-06 13:13:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:13:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:13:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2025-02-06 13:13:24,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6152219873150105 [2025-02-06 13:13:24,898 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 421 flow. Second operand 11 states and 291 transitions. [2025-02-06 13:13:24,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 144 transitions, 1329 flow [2025-02-06 13:13:24,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 144 transitions, 1283 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-02-06 13:13:24,909 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 1001 flow [2025-02-06 13:13:24,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1001, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2025-02-06 13:13:24,910 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2025-02-06 13:13:24,910 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 1001 flow [2025-02-06 13:13:24,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:24,910 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:24,910 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:24,916 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 13:13:25,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-06 13:13:25,111 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:25,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash -121705024, now seen corresponding path program 4 times [2025-02-06 13:13:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499820081] [2025-02-06 13:13:25,112 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:13:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:25,117 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:25,123 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:25,123 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:13:25,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:25,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:25,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499820081] [2025-02-06 13:13:25,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499820081] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:25,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:25,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:13:25,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553692777] [2025-02-06 13:13:25,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:25,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:13:25,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:25,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:13:25,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:13:25,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:25,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 1001 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:25,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:25,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:25,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:25,438 INFO L124 PetriNetUnfolderBase]: 849/1531 cut-off events. [2025-02-06 13:13:25,441 INFO L125 PetriNetUnfolderBase]: For 7942/7942 co-relation queries the response was YES. [2025-02-06 13:13:25,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7474 conditions, 1531 events. 849/1531 cut-off events. For 7942/7942 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7741 event pairs, 298 based on Foata normal form. 4/1535 useless extension candidates. Maximal degree in co-relation 6177. Up to 988 conditions per place. [2025-02-06 13:13:25,455 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 87 selfloop transitions, 29 changer transitions 2/119 dead transitions. [2025-02-06 13:13:25,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 119 transitions, 1461 flow [2025-02-06 13:13:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2025-02-06 13:13:25,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6465116279069767 [2025-02-06 13:13:25,456 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 1001 flow. Second operand 5 states and 139 transitions. [2025-02-06 13:13:25,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 119 transitions, 1461 flow [2025-02-06 13:13:25,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 119 transitions, 1423 flow, removed 18 selfloop flow, removed 1 redundant places. [2025-02-06 13:13:25,472 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 1141 flow [2025-02-06 13:13:25,473 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1141, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2025-02-06 13:13:25,473 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2025-02-06 13:13:25,473 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 1141 flow [2025-02-06 13:13:25,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:25,473 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:25,473 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:25,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-06 13:13:25,473 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:25,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1839454084, now seen corresponding path program 5 times [2025-02-06 13:13:25,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:25,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414757918] [2025-02-06 13:13:25,474 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:13:25,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:25,479 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:25,483 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:25,483 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:25,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:25,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:25,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414757918] [2025-02-06 13:13:25,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414757918] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:25,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029923986] [2025-02-06 13:13:25,562 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:13:25,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:25,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:25,564 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 13:13:25,564 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 13:13:25,600 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 13:13:25,612 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:13:25,612 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:25,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:25,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:13:25,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:25,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:25,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029923986] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:25,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:25,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2025-02-06 13:13:25,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638613790] [2025-02-06 13:13:25,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:25,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:13:25,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:25,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:13:25,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:13:25,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:25,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 1141 flow. Second operand has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:25,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:25,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:25,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:25,910 INFO L124 PetriNetUnfolderBase]: 891/1597 cut-off events. [2025-02-06 13:13:25,911 INFO L125 PetriNetUnfolderBase]: For 9820/9820 co-relation queries the response was YES. [2025-02-06 13:13:25,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8081 conditions, 1597 events. 891/1597 cut-off events. For 9820/9820 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8093 event pairs, 270 based on Foata normal form. 28/1625 useless extension candidates. Maximal degree in co-relation 6920. Up to 930 conditions per place. [2025-02-06 13:13:25,919 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 91 selfloop transitions, 50 changer transitions 4/146 dead transitions. [2025-02-06 13:13:25,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 146 transitions, 1797 flow [2025-02-06 13:13:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:13:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:13:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2025-02-06 13:13:25,920 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6020671834625323 [2025-02-06 13:13:25,920 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 1141 flow. Second operand 9 states and 233 transitions. [2025-02-06 13:13:25,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 146 transitions, 1797 flow [2025-02-06 13:13:25,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 146 transitions, 1757 flow, removed 9 selfloop flow, removed 1 redundant places. [2025-02-06 13:13:25,939 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 1377 flow [2025-02-06 13:13:25,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1377, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2025-02-06 13:13:25,939 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2025-02-06 13:13:25,939 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 1377 flow [2025-02-06 13:13:25,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:25,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:25,939 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:25,949 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 13:13:26,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:26,140 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:26,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:26,142 INFO L85 PathProgramCache]: Analyzing trace with hash 566847846, now seen corresponding path program 1 times [2025-02-06 13:13:26,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:26,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569384953] [2025-02-06 13:13:26,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:26,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:26,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:13:26,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:13:26,165 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:26,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:26,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:26,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569384953] [2025-02-06 13:13:26,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569384953] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:13:26,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:13:26,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:13:26,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376093065] [2025-02-06 13:13:26,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:13:26,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:13:26,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:26,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:13:26,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:13:26,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:26,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 1377 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:26,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:26,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:26,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:26,375 INFO L124 PetriNetUnfolderBase]: 807/1413 cut-off events. [2025-02-06 13:13:26,375 INFO L125 PetriNetUnfolderBase]: For 11566/11566 co-relation queries the response was YES. [2025-02-06 13:13:26,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7890 conditions, 1413 events. 807/1413 cut-off events. For 11566/11566 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6749 event pairs, 298 based on Foata normal form. 18/1431 useless extension candidates. Maximal degree in co-relation 6986. Up to 1044 conditions per place. [2025-02-06 13:13:26,383 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 97 selfloop transitions, 21 changer transitions 8/127 dead transitions. [2025-02-06 13:13:26,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 127 transitions, 1730 flow [2025-02-06 13:13:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:13:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:13:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2025-02-06 13:13:26,383 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6325581395348837 [2025-02-06 13:13:26,383 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 1377 flow. Second operand 5 states and 136 transitions. [2025-02-06 13:13:26,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 127 transitions, 1730 flow [2025-02-06 13:13:26,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 127 transitions, 1603 flow, removed 21 selfloop flow, removed 6 redundant places. [2025-02-06 13:13:26,404 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 1327 flow [2025-02-06 13:13:26,404 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1327, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2025-02-06 13:13:26,404 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2025-02-06 13:13:26,404 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 1327 flow [2025-02-06 13:13:26,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:26,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:26,405 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:26,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-06 13:13:26,405 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:26,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:26,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1546708519, now seen corresponding path program 1 times [2025-02-06 13:13:26,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:26,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580357591] [2025-02-06 13:13:26,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:26,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:26,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:13:26,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:13:26,417 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:26,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:26,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:26,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580357591] [2025-02-06 13:13:26,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580357591] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:26,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410515420] [2025-02-06 13:13:26,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:13:26,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:26,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:26,581 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 13:13:26,584 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 13:13:26,620 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 13:13:26,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:13:26,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:13:26,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:26,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-06 13:13:26,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:26,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-02-06 13:13:26,809 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 13:13:26,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:27,137 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 102 treesize of output 90 [2025-02-06 13:13:27,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:13:27,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 532 treesize of output 436 [2025-02-06 13:13:31,932 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 13:13:31,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410515420] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:31,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:31,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 21 [2025-02-06 13:13:31,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242572819] [2025-02-06 13:13:31,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:31,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 13:13:31,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:31,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 13:13:31,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2025-02-06 13:13:32,756 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:32,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 1327 flow. Second operand has 21 states, 21 states have (on average 21.285714285714285) internal successors, (447), 21 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:32,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:32,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:32,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:34,561 INFO L124 PetriNetUnfolderBase]: 1648/2838 cut-off events. [2025-02-06 13:13:34,561 INFO L125 PetriNetUnfolderBase]: For 19159/19159 co-relation queries the response was YES. [2025-02-06 13:13:34,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14955 conditions, 2838 events. 1648/2838 cut-off events. For 19159/19159 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 14406 event pairs, 42 based on Foata normal form. 86/2924 useless extension candidates. Maximal degree in co-relation 13837. Up to 775 conditions per place. [2025-02-06 13:13:34,576 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 149 selfloop transitions, 94 changer transitions 159/403 dead transitions. [2025-02-06 13:13:34,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 403 transitions, 4549 flow [2025-02-06 13:13:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-06 13:13:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-02-06 13:13:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 793 transitions. [2025-02-06 13:13:34,579 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6147286821705427 [2025-02-06 13:13:34,579 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 1327 flow. Second operand 30 states and 793 transitions. [2025-02-06 13:13:34,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 403 transitions, 4549 flow [2025-02-06 13:13:34,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 403 transitions, 4475 flow, removed 11 selfloop flow, removed 4 redundant places. [2025-02-06 13:13:34,613 INFO L231 Difference]: Finished difference. Result has 138 places, 147 transitions, 1833 flow [2025-02-06 13:13:34,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1833, PETRI_PLACES=138, PETRI_TRANSITIONS=147} [2025-02-06 13:13:34,613 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2025-02-06 13:13:34,613 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 147 transitions, 1833 flow [2025-02-06 13:13:34,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.285714285714285) internal successors, (447), 21 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:34,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:34,613 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:34,619 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 13:13:34,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:34,814 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:34,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1470414798, now seen corresponding path program 2 times [2025-02-06 13:13:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:34,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999782257] [2025-02-06 13:13:34,815 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:34,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:34,820 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:13:34,845 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:13:34,845 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:34,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:35,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:35,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999782257] [2025-02-06 13:13:35,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999782257] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:35,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562653061] [2025-02-06 13:13:35,919 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:13:35,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:35,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:35,921 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 13:13:35,922 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 13:13:35,958 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:13:36,025 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:13:36,025 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:13:36,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:36,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-06 13:13:36,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:37,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:37,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562653061] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:37,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:37,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2025-02-06 13:13:37,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857459808] [2025-02-06 13:13:37,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:37,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 13:13:37,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:37,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 13:13:37,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:13:37,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:37,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 147 transitions, 1833 flow. Second operand has 16 states, 16 states have (on average 20.625) internal successors, (330), 16 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:37,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:37,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:37,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:40,459 INFO L124 PetriNetUnfolderBase]: 1388/2454 cut-off events. [2025-02-06 13:13:40,459 INFO L125 PetriNetUnfolderBase]: For 33941/33941 co-relation queries the response was YES. [2025-02-06 13:13:40,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16153 conditions, 2454 events. 1388/2454 cut-off events. For 33941/33941 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12200 event pairs, 227 based on Foata normal form. 69/2523 useless extension candidates. Maximal degree in co-relation 16104. Up to 636 conditions per place. [2025-02-06 13:13:40,481 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 300 selfloop transitions, 80 changer transitions 15/396 dead transitions. [2025-02-06 13:13:40,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 396 transitions, 5240 flow [2025-02-06 13:13:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-06 13:13:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-02-06 13:13:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 574 transitions. [2025-02-06 13:13:40,487 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6067653276955602 [2025-02-06 13:13:40,487 INFO L175 Difference]: Start difference. First operand has 138 places, 147 transitions, 1833 flow. Second operand 22 states and 574 transitions. [2025-02-06 13:13:40,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 396 transitions, 5240 flow [2025-02-06 13:13:40,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 396 transitions, 4651 flow, removed 271 selfloop flow, removed 20 redundant places. [2025-02-06 13:13:40,541 INFO L231 Difference]: Finished difference. Result has 132 places, 199 transitions, 2452 flow [2025-02-06 13:13:40,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2452, PETRI_PLACES=132, PETRI_TRANSITIONS=199} [2025-02-06 13:13:40,542 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2025-02-06 13:13:40,542 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 199 transitions, 2452 flow [2025-02-06 13:13:40,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.625) internal successors, (330), 16 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:40,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:40,543 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:40,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 13:13:40,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:40,744 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:40,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:40,744 INFO L85 PathProgramCache]: Analyzing trace with hash -723671322, now seen corresponding path program 3 times [2025-02-06 13:13:40,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:40,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918854975] [2025-02-06 13:13:40,744 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:13:40,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:40,751 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-02-06 13:13:40,777 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:13:40,777 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:13:40,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:40,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918854975] [2025-02-06 13:13:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918854975] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199740856] [2025-02-06 13:13:40,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:13:40,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:40,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:40,999 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 13:13:41,001 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 13:13:41,037 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-02-06 13:13:41,129 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:13:41,129 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:13:41,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:41,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:13:41,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:13:41,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:13:41,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199740856] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:13:41,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:13:41,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 18 [2025-02-06 13:13:41,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974747372] [2025-02-06 13:13:41,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:13:41,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 13:13:41,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:13:41,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 13:13:41,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2025-02-06 13:13:41,639 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-02-06 13:13:41,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 199 transitions, 2452 flow. Second operand has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:41,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:13:41,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-02-06 13:13:41,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:13:43,073 INFO L124 PetriNetUnfolderBase]: 1161/1990 cut-off events. [2025-02-06 13:13:43,074 INFO L125 PetriNetUnfolderBase]: For 29982/29982 co-relation queries the response was YES. [2025-02-06 13:13:43,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13480 conditions, 1990 events. 1161/1990 cut-off events. For 29982/29982 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 8761 event pairs, 119 based on Foata normal form. 148/2138 useless extension candidates. Maximal degree in co-relation 13435. Up to 622 conditions per place. [2025-02-06 13:13:43,098 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 259 selfloop transitions, 81 changer transitions 0/341 dead transitions. [2025-02-06 13:13:43,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 341 transitions, 4668 flow [2025-02-06 13:13:43,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:13:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:13:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 384 transitions. [2025-02-06 13:13:43,100 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2025-02-06 13:13:43,101 INFO L175 Difference]: Start difference. First operand has 132 places, 199 transitions, 2452 flow. Second operand 14 states and 384 transitions. [2025-02-06 13:13:43,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 341 transitions, 4668 flow [2025-02-06 13:13:43,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 341 transitions, 4231 flow, removed 191 selfloop flow, removed 12 redundant places. [2025-02-06 13:13:43,140 INFO L231 Difference]: Finished difference. Result has 129 places, 183 transitions, 2196 flow [2025-02-06 13:13:43,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2196, PETRI_PLACES=129, PETRI_TRANSITIONS=183} [2025-02-06 13:13:43,140 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2025-02-06 13:13:43,140 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 183 transitions, 2196 flow [2025-02-06 13:13:43,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:13:43,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:13:43,141 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:13:43,149 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 13:13:43,345 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,SelfDestructingSolverStorable22 [2025-02-06 13:13:43,345 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:13:43,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:13:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash 302116697, now seen corresponding path program 4 times [2025-02-06 13:13:43,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:13:43,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262980607] [2025-02-06 13:13:43,346 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:13:43,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:13:43,350 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-02-06 13:13:43,392 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:13:43,392 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:13:43,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:13:44,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:13:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262980607] [2025-02-06 13:13:44,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262980607] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:13:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522879567] [2025-02-06 13:13:44,768 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:13:44,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:13:44,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:13:44,770 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 13:13:44,771 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 13:13:44,810 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-02-06 13:13:44,885 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:13:44,885 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:13:44,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:13:44,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-06 13:13:44,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:13:44,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-02-06 13:13:45,611 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2025-02-06 13:13:45,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 40 [2025-02-06 13:13:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:13:45,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:13:48,043 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 818 treesize of output 718 [2025-02-06 13:13:51,475 INFO L349 Elim1Store]: treesize reduction 5, result has 99.4 percent of original size [2025-02-06 13:13:51,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 25 new quantified variables, introduced 91 case distinctions, treesize of input 17611 treesize of output 8090