./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:12:01,590 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:12:01,635 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 01:12:01,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:12:01,643 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:12:01,660 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:12:01,661 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:12:01,661 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:12:01,661 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:12:01,661 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:12:01,661 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:12:01,661 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:12:01,661 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:12:01,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:12:01,661 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:12:01,662 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:12:01,662 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:12:01,662 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:12:01,662 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:12:01,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:12:01,663 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:12:01,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:12:01,663 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:12:01,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:12:01,663 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:12:01,663 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:12:01,663 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:12:01,663 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:12:01,663 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 -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2025-01-10 01:12:01,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:12:01,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:12:01,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:12:01,922 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:12:01,922 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:12:01,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2025-01-10 01:12:03,103 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/82c69e9c2/6c417da8a84e4b63a950ab121335c7d7/FLAG29a687358 [2025-01-10 01:12:03,314 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:12:03,323 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2025-01-10 01:12:03,335 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/82c69e9c2/6c417da8a84e4b63a950ab121335c7d7/FLAG29a687358 [2025-01-10 01:12:03,677 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/82c69e9c2/6c417da8a84e4b63a950ab121335c7d7 [2025-01-10 01:12:03,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:12:03,680 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:12:03,681 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:12:03,681 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:12:03,684 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:12:03,685 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40242edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03, skipping insertion in model container [2025-01-10 01:12:03,686 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,696 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:12:03,812 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-10 01:12:03,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:12:03,831 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:12:03,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:12:03,867 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:12:03,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03 WrapperNode [2025-01-10 01:12:03,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:12:03,868 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:12:03,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:12:03,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:12:03,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,881 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,903 INFO L138 Inliner]: procedures = 23, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 142 [2025-01-10 01:12:03,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:12:03,907 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:12:03,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:12:03,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:12:03,914 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,919 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,938 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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]. [2025-01-10 01:12:03,939 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,944 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,949 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,955 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:12:03,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:12:03,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:12:03,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:12:03,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (1/1) ... [2025-01-10 01:12:03,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:12:03,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:03,991 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) [2025-01-10 01:12:03,993 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 [2025-01-10 01:12:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:12:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:12:04,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:12:04,011 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:12:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:12:04,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:12:04,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 01:12:04,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-10 01:12:04,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-10 01:12:04,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-10 01:12:04,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-10 01:12:04,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:12:04,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:12:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:12:04,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 01:12:04,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 01:12:04,013 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 01:12:04,095 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:12:04,097 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:12:04,325 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:12:04,326 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:12:04,542 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:12:04,543 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-10 01:12:04,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:12:04 BoogieIcfgContainer [2025-01-10 01:12:04,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:12:04,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:12:04,546 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:12:04,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:12:04,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:12:03" (1/3) ... [2025-01-10 01:12:04,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447f2a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:12:04, skipping insertion in model container [2025-01-10 01:12:04,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:12:03" (2/3) ... [2025-01-10 01:12:04,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447f2a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:12:04, skipping insertion in model container [2025-01-10 01:12:04,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:12:04" (3/3) ... [2025-01-10 01:12:04,554 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2025-01-10 01:12:04,565 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:12:04,566 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-queue-add-2.wvr.c that has 3 procedures, 36 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2025-01-10 01:12:04,566 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:12:04,617 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-10 01:12:04,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 39 transitions, 92 flow [2025-01-10 01:12:04,673 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2025-01-10 01:12:04,675 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 01:12:04,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 37 events. 4/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 74 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2025-01-10 01:12:04,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 39 transitions, 92 flow [2025-01-10 01:12:04,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 36 transitions, 84 flow [2025-01-10 01:12:04,690 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:12:04,701 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;@7bff5264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:12:04,702 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-01-10 01:12:04,723 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:12:04,724 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-01-10 01:12:04,724 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:12:04,724 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:04,724 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:12:04,725 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:04,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:04,729 INFO L85 PathProgramCache]: Analyzing trace with hash 470365, now seen corresponding path program 1 times [2025-01-10 01:12:04,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:04,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953960966] [2025-01-10 01:12:04,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:04,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:04,789 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:12:04,805 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:12:04,806 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:04,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:12:04,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953960966] [2025-01-10 01:12:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953960966] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:12:04,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:12:04,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:12:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555181813] [2025-01-10 01:12:04,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:12:04,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:12:04,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:04,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:12:04,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:12:04,949 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-01-10 01:12:04,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:04,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:04,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-01-10 01:12:04,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:05,073 INFO L124 PetriNetUnfolderBase]: 207/401 cut-off events. [2025-01-10 01:12:05,074 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-01-10 01:12:05,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 401 events. 207/401 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1772 event pairs, 172 based on Foata normal form. 1/281 useless extension candidates. Maximal degree in co-relation 721. Up to 336 conditions per place. [2025-01-10 01:12:05,080 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 24 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2025-01-10 01:12:05,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 128 flow [2025-01-10 01:12:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:12:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:12:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2025-01-10 01:12:05,092 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2025-01-10 01:12:05,094 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 84 flow. Second operand 3 states and 56 transitions. [2025-01-10 01:12:05,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 128 flow [2025-01-10 01:12:05,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 120 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:12:05,100 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 72 flow [2025-01-10 01:12:05,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=72, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2025-01-10 01:12:05,106 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2025-01-10 01:12:05,106 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 72 flow [2025-01-10 01:12:05,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:05,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:05,107 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:12:05,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:12:05,107 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:05,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:05,108 INFO L85 PathProgramCache]: Analyzing trace with hash 470366, now seen corresponding path program 1 times [2025-01-10 01:12:05,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:05,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004073574] [2025-01-10 01:12:05,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:05,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:05,113 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:12:05,134 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:12:05,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:05,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:12:05,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:05,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004073574] [2025-01-10 01:12:05,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004073574] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:12:05,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:12:05,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:12:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827193851] [2025-01-10 01:12:05,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:12:05,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:12:05,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:05,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:12:05,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:12:05,362 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-01-10 01:12:05,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:05,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:05,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-01-10 01:12:05,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:05,538 INFO L124 PetriNetUnfolderBase]: 208/404 cut-off events. [2025-01-10 01:12:05,538 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-01-10 01:12:05,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 404 events. 208/404 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1782 event pairs, 172 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 741. Up to 341 conditions per place. [2025-01-10 01:12:05,542 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 26 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2025-01-10 01:12:05,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 140 flow [2025-01-10 01:12:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:12:05,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:12:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2025-01-10 01:12:05,544 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2025-01-10 01:12:05,545 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 72 flow. Second operand 4 states and 67 transitions. [2025-01-10 01:12:05,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 140 flow [2025-01-10 01:12:05,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:12:05,547 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 95 flow [2025-01-10 01:12:05,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2025-01-10 01:12:05,547 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2025-01-10 01:12:05,547 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 95 flow [2025-01-10 01:12:05,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:05,548 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:05,548 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-01-10 01:12:05,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:12:05,548 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:05,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash 452036578, now seen corresponding path program 1 times [2025-01-10 01:12:05,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:05,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660869663] [2025-01-10 01:12:05,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:05,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:05,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:12:05,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:12:05,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:05,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:12:05,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:05,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660869663] [2025-01-10 01:12:05,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660869663] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:05,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302421335] [2025-01-10 01:12:05,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:05,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:05,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:05,800 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) [2025-01-10 01:12:05,801 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 [2025-01-10 01:12:05,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:12:05,847 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:12:05,848 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:05,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:05,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:12:05,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:05,907 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 [2025-01-10 01:12:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:12:06,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:12:06,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302421335] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:06,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:06,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-01-10 01:12:06,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642853824] [2025-01-10 01:12:06,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:06,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:12:06,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:06,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:12:06,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:12:06,127 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-01-10 01:12:06,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 95 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:06,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:06,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-01-10 01:12:06,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:06,338 INFO L124 PetriNetUnfolderBase]: 209/406 cut-off events. [2025-01-10 01:12:06,338 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-01-10 01:12:06,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 406 events. 209/406 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1792 event pairs, 172 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 748. Up to 338 conditions per place. [2025-01-10 01:12:06,341 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 22 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2025-01-10 01:12:06,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 167 flow [2025-01-10 01:12:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:12:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:12:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2025-01-10 01:12:06,343 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33974358974358976 [2025-01-10 01:12:06,343 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 95 flow. Second operand 8 states and 106 transitions. [2025-01-10 01:12:06,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 167 flow [2025-01-10 01:12:06,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:12:06,344 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 120 flow [2025-01-10 01:12:06,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=120, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2025-01-10 01:12:06,344 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2025-01-10 01:12:06,345 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 120 flow [2025-01-10 01:12:06,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:06,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:06,345 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 01:12:06,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-10 01:12:06,545 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 [2025-01-10 01:12:06,546 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:06,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:06,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1130154917, now seen corresponding path program 1 times [2025-01-10 01:12:06,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:06,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530184698] [2025-01-10 01:12:06,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:06,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:06,551 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:12:06,559 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:12:06,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:06,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:12:06,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:06,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530184698] [2025-01-10 01:12:06,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530184698] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:12:06,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:12:06,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:12:06,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648326859] [2025-01-10 01:12:06,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:12:06,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:12:06,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:06,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:12:06,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:12:06,621 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-01-10 01:12:06,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:06,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:06,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-01-10 01:12:06,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:06,673 INFO L124 PetriNetUnfolderBase]: 144/288 cut-off events. [2025-01-10 01:12:06,673 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:12:06,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 288 events. 144/288 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1128 event pairs, 113 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 523. Up to 231 conditions per place. [2025-01-10 01:12:06,675 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 25 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2025-01-10 01:12:06,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 172 flow [2025-01-10 01:12:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:12:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:12:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2025-01-10 01:12:06,676 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2025-01-10 01:12:06,676 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 120 flow. Second operand 4 states and 62 transitions. [2025-01-10 01:12:06,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 172 flow [2025-01-10 01:12:06,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 130 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-01-10 01:12:06,677 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 80 flow [2025-01-10 01:12:06,677 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2025-01-10 01:12:06,678 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2025-01-10 01:12:06,678 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 80 flow [2025-01-10 01:12:06,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:06,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:06,678 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 01:12:06,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-10 01:12:06,678 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:06,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:06,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1130154918, now seen corresponding path program 1 times [2025-01-10 01:12:06,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:06,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480284517] [2025-01-10 01:12:06,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:06,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:06,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:12:06,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:12:06,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:06,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:12:06,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:06,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480284517] [2025-01-10 01:12:06,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480284517] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:12:06,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:12:06,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:12:06,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650785140] [2025-01-10 01:12:06,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:12:06,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:12:06,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:06,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:12:06,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:12:06,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-01-10 01:12:06,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:06,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:06,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-01-10 01:12:06,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:06,844 INFO L124 PetriNetUnfolderBase]: 156/320 cut-off events. [2025-01-10 01:12:06,845 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:12:06,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 320 events. 156/320 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1229 event pairs, 126 based on Foata normal form. 17/279 useless extension candidates. Maximal degree in co-relation 515. Up to 236 conditions per place. [2025-01-10 01:12:06,846 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 26 selfloop transitions, 2 changer transitions 8/41 dead transitions. [2025-01-10 01:12:06,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 168 flow [2025-01-10 01:12:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:12:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:12:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2025-01-10 01:12:06,847 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2025-01-10 01:12:06,847 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 80 flow. Second operand 4 states and 79 transitions. [2025-01-10 01:12:06,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 168 flow [2025-01-10 01:12:06,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 163 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:12:06,848 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 88 flow [2025-01-10 01:12:06,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2025-01-10 01:12:06,849 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2025-01-10 01:12:06,849 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 88 flow [2025-01-10 01:12:06,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:06,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:06,849 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:06,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-10 01:12:06,850 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:06,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1901605538, now seen corresponding path program 1 times [2025-01-10 01:12:06,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:06,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317474921] [2025-01-10 01:12:06,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:06,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:06,854 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:12:06,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:12:06,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:06,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:12:07,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:07,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317474921] [2025-01-10 01:12:07,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317474921] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:12:07,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:12:07,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:12:07,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340628401] [2025-01-10 01:12:07,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:12:07,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:12:07,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:07,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:12:07,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:12:07,024 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-01-10 01:12:07,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:07,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:07,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-01-10 01:12:07,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:07,089 INFO L124 PetriNetUnfolderBase]: 90/189 cut-off events. [2025-01-10 01:12:07,093 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-01-10 01:12:07,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 189 events. 90/189 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 605 event pairs, 66 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 376. Up to 144 conditions per place. [2025-01-10 01:12:07,098 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 22 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2025-01-10 01:12:07,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 126 flow [2025-01-10 01:12:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:12:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:12:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2025-01-10 01:12:07,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2025-01-10 01:12:07,099 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 88 flow. Second operand 4 states and 63 transitions. [2025-01-10 01:12:07,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 126 flow [2025-01-10 01:12:07,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:12:07,101 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 78 flow [2025-01-10 01:12:07,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2025-01-10 01:12:07,103 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2025-01-10 01:12:07,103 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 78 flow [2025-01-10 01:12:07,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:07,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:07,104 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:07,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-10 01:12:07,104 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:07,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1409307891, now seen corresponding path program 1 times [2025-01-10 01:12:07,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:07,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280620688] [2025-01-10 01:12:07,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:07,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:07,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-10 01:12:07,118 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-10 01:12:07,118 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:07,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:07,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:07,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280620688] [2025-01-10 01:12:07,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280620688] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:12:07,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:12:07,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-10 01:12:07,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565048529] [2025-01-10 01:12:07,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:12:07,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:12:07,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:07,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:12:07,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:12:07,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2025-01-10 01:12:07,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 78 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:07,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:07,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2025-01-10 01:12:07,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:07,425 INFO L124 PetriNetUnfolderBase]: 230/430 cut-off events. [2025-01-10 01:12:07,425 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2025-01-10 01:12:07,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 430 events. 230/430 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1795 event pairs, 63 based on Foata normal form. 1/430 useless extension candidates. Maximal degree in co-relation 929. Up to 155 conditions per place. [2025-01-10 01:12:07,428 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 50 selfloop transitions, 10 changer transitions 7/70 dead transitions. [2025-01-10 01:12:07,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 70 transitions, 319 flow [2025-01-10 01:12:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:12:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:12:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2025-01-10 01:12:07,430 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40705128205128205 [2025-01-10 01:12:07,431 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 78 flow. Second operand 8 states and 127 transitions. [2025-01-10 01:12:07,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 70 transitions, 319 flow [2025-01-10 01:12:07,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:12:07,433 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 135 flow [2025-01-10 01:12:07,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=135, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2025-01-10 01:12:07,436 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2025-01-10 01:12:07,436 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 135 flow [2025-01-10 01:12:07,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:07,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:07,436 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:07,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-01-10 01:12:07,436 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:07,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1639324769, now seen corresponding path program 2 times [2025-01-10 01:12:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:07,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687607021] [2025-01-10 01:12:07,437 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:12:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:07,447 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-10 01:12:07,451 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 21 statements. [2025-01-10 01:12:07,451 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:12:07,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:07,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:07,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687607021] [2025-01-10 01:12:07,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687607021] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:12:07,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:12:07,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:12:07,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776897873] [2025-01-10 01:12:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:12:07,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:12:07,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:07,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:12:07,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:12:07,490 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-01-10 01:12:07,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:07,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:07,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-01-10 01:12:07,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:07,564 INFO L124 PetriNetUnfolderBase]: 146/312 cut-off events. [2025-01-10 01:12:07,566 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2025-01-10 01:12:07,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 312 events. 146/312 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1190 event pairs, 39 based on Foata normal form. 6/314 useless extension candidates. Maximal degree in co-relation 804. Up to 214 conditions per place. [2025-01-10 01:12:07,568 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 31 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2025-01-10 01:12:07,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 216 flow [2025-01-10 01:12:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:12:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:12:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-01-10 01:12:07,569 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49572649572649574 [2025-01-10 01:12:07,569 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 135 flow. Second operand 3 states and 58 transitions. [2025-01-10 01:12:07,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 216 flow [2025-01-10 01:12:07,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 204 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-01-10 01:12:07,573 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 142 flow [2025-01-10 01:12:07,573 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2025-01-10 01:12:07,573 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2025-01-10 01:12:07,574 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 142 flow [2025-01-10 01:12:07,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:07,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:07,575 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] [2025-01-10 01:12:07,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-10 01:12:07,575 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:07,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:07,575 INFO L85 PathProgramCache]: Analyzing trace with hash -293426554, now seen corresponding path program 1 times [2025-01-10 01:12:07,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:07,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325238820] [2025-01-10 01:12:07,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:07,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:07,582 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 01:12:07,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 01:12:07,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:07,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:12:07,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:07,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325238820] [2025-01-10 01:12:07,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325238820] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:07,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655153040] [2025-01-10 01:12:07,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:07,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:07,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:07,725 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) [2025-01-10 01:12:07,726 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 [2025-01-10 01:12:07,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 01:12:07,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 01:12:07,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:07,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:07,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:12:07,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:12:07,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:12:07,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655153040] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:07,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:07,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-01-10 01:12:07,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402661460] [2025-01-10 01:12:07,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:07,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 01:12:07,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:07,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 01:12:07,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-01-10 01:12:07,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-01-10 01:12:07,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 142 flow. Second operand has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:07,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:07,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-01-10 01:12:07,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:08,102 INFO L124 PetriNetUnfolderBase]: 238/537 cut-off events. [2025-01-10 01:12:08,103 INFO L125 PetriNetUnfolderBase]: For 476/476 co-relation queries the response was YES. [2025-01-10 01:12:08,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 537 events. 238/537 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2521 event pairs, 137 based on Foata normal form. 24/552 useless extension candidates. Maximal degree in co-relation 838. Up to 248 conditions per place. [2025-01-10 01:12:08,108 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 42 selfloop transitions, 7 changer transitions 4/61 dead transitions. [2025-01-10 01:12:08,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 331 flow [2025-01-10 01:12:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:12:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:12:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2025-01-10 01:12:08,109 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43223443223443225 [2025-01-10 01:12:08,109 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 142 flow. Second operand 7 states and 118 transitions. [2025-01-10 01:12:08,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 331 flow [2025-01-10 01:12:08,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 310 flow, removed 8 selfloop flow, removed 2 redundant places. [2025-01-10 01:12:08,111 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 158 flow [2025-01-10 01:12:08,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2025-01-10 01:12:08,114 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2025-01-10 01:12:08,115 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 158 flow [2025-01-10 01:12:08,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:08,115 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:08,115 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:08,121 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 [2025-01-10 01:12:08,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:08,319 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:08,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:08,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2056396950, now seen corresponding path program 1 times [2025-01-10 01:12:08,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:08,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500628115] [2025-01-10 01:12:08,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:08,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:08,326 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 01:12:08,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 01:12:08,337 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:08,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:12:08,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:08,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500628115] [2025-01-10 01:12:08,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500628115] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:08,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943476729] [2025-01-10 01:12:08,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:08,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:08,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:08,462 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) [2025-01-10 01:12:08,463 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 [2025-01-10 01:12:08,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 01:12:08,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 01:12:08,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:08,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:08,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:12:08,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:12:08,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:12:08,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943476729] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:08,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:08,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-01-10 01:12:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111950466] [2025-01-10 01:12:08,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:08,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 01:12:08,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:08,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 01:12:08,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-01-10 01:12:08,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-01-10 01:12:08,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 158 flow. Second operand has 13 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:08,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:08,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-01-10 01:12:08,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:08,866 INFO L124 PetriNetUnfolderBase]: 176/392 cut-off events. [2025-01-10 01:12:08,866 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2025-01-10 01:12:08,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 392 events. 176/392 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1603 event pairs, 52 based on Foata normal form. 5/394 useless extension candidates. Maximal degree in co-relation 802. Up to 214 conditions per place. [2025-01-10 01:12:08,873 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 26 selfloop transitions, 7 changer transitions 19/60 dead transitions. [2025-01-10 01:12:08,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 320 flow [2025-01-10 01:12:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:12:08,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:12:08,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2025-01-10 01:12:08,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2025-01-10 01:12:08,874 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 158 flow. Second operand 9 states and 141 transitions. [2025-01-10 01:12:08,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 320 flow [2025-01-10 01:12:08,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 304 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-01-10 01:12:08,876 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 146 flow [2025-01-10 01:12:08,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=146, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2025-01-10 01:12:08,876 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2025-01-10 01:12:08,876 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 146 flow [2025-01-10 01:12:08,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:08,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:08,877 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:08,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-10 01:12:09,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:09,081 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:09,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:09,081 INFO L85 PathProgramCache]: Analyzing trace with hash -117329416, now seen corresponding path program 2 times [2025-01-10 01:12:09,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:09,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281082635] [2025-01-10 01:12:09,081 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:12:09,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:09,088 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-01-10 01:12:09,099 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 26 statements. [2025-01-10 01:12:09,099 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:12:09,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:12:09,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:09,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281082635] [2025-01-10 01:12:09,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281082635] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:12:09,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:12:09,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:12:09,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494550475] [2025-01-10 01:12:09,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:12:09,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:12:09,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:09,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:12:09,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:12:09,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2025-01-10 01:12:09,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2025-01-10 01:12:09,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:09,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2025-01-10 01:12:09,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:09,284 INFO L124 PetriNetUnfolderBase]: 183/363 cut-off events. [2025-01-10 01:12:09,284 INFO L125 PetriNetUnfolderBase]: For 276/277 co-relation queries the response was YES. [2025-01-10 01:12:09,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 999 conditions, 363 events. 183/363 cut-off events. For 276/277 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1289 event pairs, 25 based on Foata normal form. 12/372 useless extension candidates. Maximal degree in co-relation 964. Up to 126 conditions per place. [2025-01-10 01:12:09,286 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 48 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2025-01-10 01:12:09,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 343 flow [2025-01-10 01:12:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:12:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:12:09,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2025-01-10 01:12:09,287 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2025-01-10 01:12:09,287 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 146 flow. Second operand 6 states and 98 transitions. [2025-01-10 01:12:09,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 343 flow [2025-01-10 01:12:09,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 319 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-01-10 01:12:09,289 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 171 flow [2025-01-10 01:12:09,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=171, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2025-01-10 01:12:09,289 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2025-01-10 01:12:09,289 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 171 flow [2025-01-10 01:12:09,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2025-01-10 01:12:09,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:09,289 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] [2025-01-10 01:12:09,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-01-10 01:12:09,289 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:09,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1763354206, now seen corresponding path program 2 times [2025-01-10 01:12:09,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:09,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204442323] [2025-01-10 01:12:09,290 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:12:09,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:09,295 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-01-10 01:12:09,301 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-01-10 01:12:09,302 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:12:09,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:12:09,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:09,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204442323] [2025-01-10 01:12:09,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204442323] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:12:09,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:12:09,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:12:09,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496808202] [2025-01-10 01:12:09,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:12:09,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:12:09,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:09,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:12:09,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:12:09,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-01-10 01:12:09,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:09,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:09,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-01-10 01:12:09,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:09,439 INFO L124 PetriNetUnfolderBase]: 226/532 cut-off events. [2025-01-10 01:12:09,439 INFO L125 PetriNetUnfolderBase]: For 567/582 co-relation queries the response was YES. [2025-01-10 01:12:09,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1438 conditions, 532 events. 226/532 cut-off events. For 567/582 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2504 event pairs, 51 based on Foata normal form. 16/539 useless extension candidates. Maximal degree in co-relation 1406. Up to 171 conditions per place. [2025-01-10 01:12:09,442 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 48 selfloop transitions, 8 changer transitions 4/68 dead transitions. [2025-01-10 01:12:09,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 378 flow [2025-01-10 01:12:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:12:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:12:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2025-01-10 01:12:09,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2025-01-10 01:12:09,443 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 171 flow. Second operand 4 states and 88 transitions. [2025-01-10 01:12:09,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 378 flow [2025-01-10 01:12:09,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 68 transitions, 367 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-01-10 01:12:09,445 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 201 flow [2025-01-10 01:12:09,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2025-01-10 01:12:09,446 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2025-01-10 01:12:09,446 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 201 flow [2025-01-10 01:12:09,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:09,446 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:09,446 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, 1] [2025-01-10 01:12:09,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-01-10 01:12:09,446 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:09,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:09,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1346097127, now seen corresponding path program 1 times [2025-01-10 01:12:09,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:09,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734044185] [2025-01-10 01:12:09,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:09,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:09,452 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-10 01:12:09,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:12:09,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:09,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:12:10,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:10,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734044185] [2025-01-10 01:12:10,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734044185] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:10,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770015542] [2025-01-10 01:12:10,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:12:10,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:10,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:10,019 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) [2025-01-10 01:12:10,021 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 [2025-01-10 01:12:10,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-10 01:12:10,078 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:12:10,078 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:10,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:10,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-01-10 01:12:10,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:10,417 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:12:10,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2025-01-10 01:12:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:12:10,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:10,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:12:10,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-01-10 01:12:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:12:11,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770015542] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:11,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:11,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2025-01-10 01:12:11,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979892804] [2025-01-10 01:12:11,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:11,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-01-10 01:12:11,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:11,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-01-10 01:12:11,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2025-01-10 01:12:11,166 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:12:11,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 201 flow. Second operand has 40 states, 40 states have (on average 7.95) internal successors, (318), 40 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:11,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:11,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:12:11,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:14,049 INFO L124 PetriNetUnfolderBase]: 1189/2088 cut-off events. [2025-01-10 01:12:14,049 INFO L125 PetriNetUnfolderBase]: For 2533/2533 co-relation queries the response was YES. [2025-01-10 01:12:14,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6529 conditions, 2088 events. 1189/2088 cut-off events. For 2533/2533 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10662 event pairs, 79 based on Foata normal form. 3/2088 useless extension candidates. Maximal degree in co-relation 5252. Up to 736 conditions per place. [2025-01-10 01:12:14,059 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 197 selfloop transitions, 119 changer transitions 45/362 dead transitions. [2025-01-10 01:12:14,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 362 transitions, 2234 flow [2025-01-10 01:12:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2025-01-10 01:12:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2025-01-10 01:12:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 651 transitions. [2025-01-10 01:12:14,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3149492017416546 [2025-01-10 01:12:14,062 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 201 flow. Second operand 53 states and 651 transitions. [2025-01-10 01:12:14,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 362 transitions, 2234 flow [2025-01-10 01:12:14,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 362 transitions, 2158 flow, removed 38 selfloop flow, removed 1 redundant places. [2025-01-10 01:12:14,070 INFO L231 Difference]: Finished difference. Result has 118 places, 166 transitions, 1367 flow [2025-01-10 01:12:14,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=1367, PETRI_PLACES=118, PETRI_TRANSITIONS=166} [2025-01-10 01:12:14,071 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 79 predicate places. [2025-01-10 01:12:14,072 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 166 transitions, 1367 flow [2025-01-10 01:12:14,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 7.95) internal successors, (318), 40 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:14,072 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:14,072 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, 1] [2025-01-10 01:12:14,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-10 01:12:14,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-01-10 01:12:14,275 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:14,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash 263295105, now seen corresponding path program 2 times [2025-01-10 01:12:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:14,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254889038] [2025-01-10 01:12:14,275 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:12:14,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:14,283 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-01-10 01:12:14,298 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:12:14,299 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:12:14,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:12:14,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:14,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254889038] [2025-01-10 01:12:14,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254889038] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:14,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227292639] [2025-01-10 01:12:14,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:12:14,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:14,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:14,846 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) [2025-01-10 01:12:14,848 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 [2025-01-10 01:12:14,881 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-01-10 01:12:14,898 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:12:14,898 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:12:14,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:14,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-01-10 01:12:14,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:12:15,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:15,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:12:15,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-01-10 01:12:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:12:15,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227292639] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:15,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:15,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2025-01-10 01:12:15,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204029783] [2025-01-10 01:12:15,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:15,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-01-10 01:12:15,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:15,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-01-10 01:12:15,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722 [2025-01-10 01:12:15,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:12:15,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 166 transitions, 1367 flow. Second operand has 42 states, 42 states have (on average 7.928571428571429) internal successors, (333), 42 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:15,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:15,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:12:15,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:18,824 INFO L124 PetriNetUnfolderBase]: 1547/2697 cut-off events. [2025-01-10 01:12:18,825 INFO L125 PetriNetUnfolderBase]: For 8073/8073 co-relation queries the response was YES. [2025-01-10 01:12:18,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11476 conditions, 2697 events. 1547/2697 cut-off events. For 8073/8073 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14609 event pairs, 112 based on Foata normal form. 3/2700 useless extension candidates. Maximal degree in co-relation 11432. Up to 782 conditions per place. [2025-01-10 01:12:18,840 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 278 selfloop transitions, 186 changer transitions 28/493 dead transitions. [2025-01-10 01:12:18,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 493 transitions, 4354 flow [2025-01-10 01:12:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-01-10 01:12:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2025-01-10 01:12:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 646 transitions. [2025-01-10 01:12:18,843 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3067426400759734 [2025-01-10 01:12:18,843 INFO L175 Difference]: Start difference. First operand has 118 places, 166 transitions, 1367 flow. Second operand 54 states and 646 transitions. [2025-01-10 01:12:18,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 493 transitions, 4354 flow [2025-01-10 01:12:18,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 493 transitions, 3956 flow, removed 193 selfloop flow, removed 7 redundant places. [2025-01-10 01:12:18,873 INFO L231 Difference]: Finished difference. Result has 175 places, 270 transitions, 2678 flow [2025-01-10 01:12:18,874 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=2678, PETRI_PLACES=175, PETRI_TRANSITIONS=270} [2025-01-10 01:12:18,874 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 136 predicate places. [2025-01-10 01:12:18,874 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 270 transitions, 2678 flow [2025-01-10 01:12:18,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.928571428571429) internal successors, (333), 42 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:18,874 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:18,874 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, 1] [2025-01-10 01:12:18,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-10 01:12:19,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-01-10 01:12:19,075 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:19,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash -701995373, now seen corresponding path program 3 times [2025-01-10 01:12:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736963386] [2025-01-10 01:12:19,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:12:19,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:19,085 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 3 equivalence classes. [2025-01-10 01:12:19,101 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 29 statements. [2025-01-10 01:12:19,101 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:12:19,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:12:19,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:19,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736963386] [2025-01-10 01:12:19,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736963386] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:19,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784850639] [2025-01-10 01:12:19,290 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:12:19,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:19,292 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) [2025-01-10 01:12:19,294 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 [2025-01-10 01:12:19,332 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 3 equivalence classes. [2025-01-10 01:12:19,349 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 29 statements. [2025-01-10 01:12:19,349 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:12:19,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:19,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:12:19,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:12:19,474 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:19,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:12:19,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2025-01-10 01:12:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:12:19,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784850639] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:19,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:19,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2025-01-10 01:12:19,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347480586] [2025-01-10 01:12:19,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:19,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-10 01:12:19,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:19,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-10 01:12:19,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2025-01-10 01:12:19,663 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:12:19,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 270 transitions, 2678 flow. Second operand has 24 states, 24 states have (on average 8.083333333333334) internal successors, (194), 24 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:19,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:19,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:12:19,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:20,535 INFO L124 PetriNetUnfolderBase]: 1924/3351 cut-off events. [2025-01-10 01:12:20,535 INFO L125 PetriNetUnfolderBase]: For 17317/17317 co-relation queries the response was YES. [2025-01-10 01:12:20,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16762 conditions, 3351 events. 1924/3351 cut-off events. For 17317/17317 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19278 event pairs, 85 based on Foata normal form. 1/3352 useless extension candidates. Maximal degree in co-relation 16695. Up to 850 conditions per place. [2025-01-10 01:12:20,558 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 291 selfloop transitions, 239 changer transitions 23/554 dead transitions. [2025-01-10 01:12:20,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 554 transitions, 6121 flow [2025-01-10 01:12:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-01-10 01:12:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-01-10 01:12:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 380 transitions. [2025-01-10 01:12:20,565 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3247863247863248 [2025-01-10 01:12:20,565 INFO L175 Difference]: Start difference. First operand has 175 places, 270 transitions, 2678 flow. Second operand 30 states and 380 transitions. [2025-01-10 01:12:20,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 554 transitions, 6121 flow [2025-01-10 01:12:20,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 554 transitions, 5804 flow, removed 129 selfloop flow, removed 20 redundant places. [2025-01-10 01:12:20,634 INFO L231 Difference]: Finished difference. Result has 192 places, 383 transitions, 4485 flow [2025-01-10 01:12:20,636 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2438, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4485, PETRI_PLACES=192, PETRI_TRANSITIONS=383} [2025-01-10 01:12:20,636 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 153 predicate places. [2025-01-10 01:12:20,637 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 383 transitions, 4485 flow [2025-01-10 01:12:20,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.083333333333334) internal successors, (194), 24 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:20,637 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:20,637 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, 1] [2025-01-10 01:12:20,647 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 [2025-01-10 01:12:20,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-01-10 01:12:20,842 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:20,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1262464793, now seen corresponding path program 4 times [2025-01-10 01:12:20,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:20,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592070512] [2025-01-10 01:12:20,843 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:12:20,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:20,847 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-01-10 01:12:20,853 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:12:20,853 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:12:20,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:12:21,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:21,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592070512] [2025-01-10 01:12:21,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592070512] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:21,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866294060] [2025-01-10 01:12:21,040 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:12:21,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:21,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:21,042 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) [2025-01-10 01:12:21,043 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 [2025-01-10 01:12:21,076 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-01-10 01:12:21,093 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:12:21,093 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:12:21,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:21,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-01-10 01:12:21,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:21,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:12:21,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2025-01-10 01:12:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:12:21,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:21,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:12:21,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-01-10 01:12:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:12:21,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866294060] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:21,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:21,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 36 [2025-01-10 01:12:21,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44197826] [2025-01-10 01:12:21,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:21,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-01-10 01:12:21,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:21,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-01-10 01:12:21,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2025-01-10 01:12:21,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:12:21,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 383 transitions, 4485 flow. Second operand has 37 states, 37 states have (on average 8.108108108108109) internal successors, (300), 37 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:21,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:21,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:12:21,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:27,660 INFO L124 PetriNetUnfolderBase]: 4170/7290 cut-off events. [2025-01-10 01:12:27,661 INFO L125 PetriNetUnfolderBase]: For 56942/56942 co-relation queries the response was YES. [2025-01-10 01:12:27,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41628 conditions, 7290 events. 4170/7290 cut-off events. For 56942/56942 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 48468 event pairs, 180 based on Foata normal form. 17/7307 useless extension candidates. Maximal degree in co-relation 41521. Up to 1981 conditions per place. [2025-01-10 01:12:27,706 INFO L140 encePairwiseOnDemand]: 23/39 looper letters, 467 selfloop transitions, 693 changer transitions 147/1308 dead transitions. [2025-01-10 01:12:27,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1308 transitions, 16008 flow [2025-01-10 01:12:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2025-01-10 01:12:27,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2025-01-10 01:12:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 1546 transitions. [2025-01-10 01:12:27,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32228476130915157 [2025-01-10 01:12:27,711 INFO L175 Difference]: Start difference. First operand has 192 places, 383 transitions, 4485 flow. Second operand 123 states and 1546 transitions. [2025-01-10 01:12:27,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1308 transitions, 16008 flow [2025-01-10 01:12:27,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1308 transitions, 14905 flow, removed 432 selfloop flow, removed 11 redundant places. [2025-01-10 01:12:27,983 INFO L231 Difference]: Finished difference. Result has 348 places, 850 transitions, 12240 flow [2025-01-10 01:12:27,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=12240, PETRI_PLACES=348, PETRI_TRANSITIONS=850} [2025-01-10 01:12:27,984 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 309 predicate places. [2025-01-10 01:12:27,984 INFO L471 AbstractCegarLoop]: Abstraction has has 348 places, 850 transitions, 12240 flow [2025-01-10 01:12:27,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.108108108108109) internal successors, (300), 37 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:27,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:27,984 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, 1] [2025-01-10 01:12:27,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-10 01:12:28,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:28,185 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:28,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:28,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1913272397, now seen corresponding path program 5 times [2025-01-10 01:12:28,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:28,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677761976] [2025-01-10 01:12:28,186 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:12:28,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:28,191 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 3 equivalence classes. [2025-01-10 01:12:28,204 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:12:28,204 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-10 01:12:28,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:12:28,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:28,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677761976] [2025-01-10 01:12:28,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677761976] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:28,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729868211] [2025-01-10 01:12:28,754 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:12:28,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:28,756 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) [2025-01-10 01:12:28,758 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 [2025-01-10 01:12:28,796 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 3 equivalence classes. [2025-01-10 01:12:28,814 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 01:12:28,814 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-10 01:12:28,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:28,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-10 01:12:28,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:29,068 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 11 treesize of output 3 [2025-01-10 01:12:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:12:29,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:29,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:12:29,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-01-10 01:12:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:12:29,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729868211] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:29,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:29,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2025-01-10 01:12:29,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310050639] [2025-01-10 01:12:29,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:29,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-01-10 01:12:29,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:29,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-01-10 01:12:29,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2025-01-10 01:12:29,716 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:12:29,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 850 transitions, 12240 flow. Second operand has 42 states, 42 states have (on average 7.857142857142857) internal successors, (330), 42 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) [2025-01-10 01:12:29,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:29,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:12:29,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:32,424 INFO L124 PetriNetUnfolderBase]: 3972/6965 cut-off events. [2025-01-10 01:12:32,425 INFO L125 PetriNetUnfolderBase]: For 100862/100862 co-relation queries the response was YES. [2025-01-10 01:12:32,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48034 conditions, 6965 events. 3972/6965 cut-off events. For 100862/100862 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 46571 event pairs, 386 based on Foata normal form. 51/7016 useless extension candidates. Maximal degree in co-relation 47817. Up to 3796 conditions per place. [2025-01-10 01:12:32,482 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 573 selfloop transitions, 470 changer transitions 87/1131 dead transitions. [2025-01-10 01:12:32,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1131 transitions, 17766 flow [2025-01-10 01:12:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-01-10 01:12:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-01-10 01:12:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 502 transitions. [2025-01-10 01:12:32,484 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2925407925407925 [2025-01-10 01:12:32,484 INFO L175 Difference]: Start difference. First operand has 348 places, 850 transitions, 12240 flow. Second operand 44 states and 502 transitions. [2025-01-10 01:12:32,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1131 transitions, 17766 flow [2025-01-10 01:12:33,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1131 transitions, 15700 flow, removed 966 selfloop flow, removed 31 redundant places. [2025-01-10 01:12:33,412 INFO L231 Difference]: Finished difference. Result has 362 places, 924 transitions, 13594 flow [2025-01-10 01:12:33,413 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=10718, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13594, PETRI_PLACES=362, PETRI_TRANSITIONS=924} [2025-01-10 01:12:33,413 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 323 predicate places. [2025-01-10 01:12:33,413 INFO L471 AbstractCegarLoop]: Abstraction has has 362 places, 924 transitions, 13594 flow [2025-01-10 01:12:33,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.857142857142857) internal successors, (330), 42 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) [2025-01-10 01:12:33,413 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:33,413 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:33,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-10 01:12:33,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-10 01:12:33,614 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:33,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash 345939785, now seen corresponding path program 6 times [2025-01-10 01:12:33,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:33,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277050874] [2025-01-10 01:12:33,618 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:12:33,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:33,624 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 4 equivalence classes. [2025-01-10 01:12:33,643 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 29 of 31 statements. [2025-01-10 01:12:33,643 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-10 01:12:33,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-10 01:12:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:33,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277050874] [2025-01-10 01:12:33,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277050874] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:33,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663063907] [2025-01-10 01:12:33,825 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:12:33,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:33,827 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) [2025-01-10 01:12:33,829 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 [2025-01-10 01:12:33,865 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 4 equivalence classes. [2025-01-10 01:12:33,883 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 29 of 31 statements. [2025-01-10 01:12:33,884 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-10 01:12:33,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:33,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-10 01:12:33,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-10 01:12:33,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:34,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:12:34,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-01-10 01:12:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-10 01:12:34,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663063907] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:34,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:34,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2025-01-10 01:12:34,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105930314] [2025-01-10 01:12:34,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:34,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-10 01:12:34,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:34,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-10 01:12:34,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2025-01-10 01:12:34,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:12:34,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 924 transitions, 13594 flow. Second operand has 21 states, 21 states have (on average 8.333333333333334) internal successors, (175), 21 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:34,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:34,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:12:34,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:35,793 INFO L124 PetriNetUnfolderBase]: 3832/6685 cut-off events. [2025-01-10 01:12:35,794 INFO L125 PetriNetUnfolderBase]: For 100087/100087 co-relation queries the response was YES. [2025-01-10 01:12:35,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45894 conditions, 6685 events. 3832/6685 cut-off events. For 100087/100087 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 43757 event pairs, 361 based on Foata normal form. 1/6686 useless extension candidates. Maximal degree in co-relation 45775. Up to 3495 conditions per place. [2025-01-10 01:12:35,853 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 581 selfloop transitions, 406 changer transitions 14/1002 dead transitions. [2025-01-10 01:12:35,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1002 transitions, 16167 flow [2025-01-10 01:12:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-10 01:12:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-01-10 01:12:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 211 transitions. [2025-01-10 01:12:35,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33814102564102566 [2025-01-10 01:12:35,856 INFO L175 Difference]: Start difference. First operand has 362 places, 924 transitions, 13594 flow. Second operand 16 states and 211 transitions. [2025-01-10 01:12:35,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1002 transitions, 16167 flow [2025-01-10 01:12:36,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1002 transitions, 15743 flow, removed 92 selfloop flow, removed 24 redundant places. [2025-01-10 01:12:36,787 INFO L231 Difference]: Finished difference. Result has 344 places, 927 transitions, 14345 flow [2025-01-10 01:12:36,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=13190, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=14345, PETRI_PLACES=344, PETRI_TRANSITIONS=927} [2025-01-10 01:12:36,788 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 305 predicate places. [2025-01-10 01:12:36,788 INFO L471 AbstractCegarLoop]: Abstraction has has 344 places, 927 transitions, 14345 flow [2025-01-10 01:12:36,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.333333333333334) internal successors, (175), 21 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:36,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:36,788 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:36,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-10 01:12:36,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-10 01:12:36,991 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:36,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:36,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1964319173, now seen corresponding path program 7 times [2025-01-10 01:12:36,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:36,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126116212] [2025-01-10 01:12:36,992 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:12:36,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:36,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-10 01:12:37,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-10 01:12:37,010 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:37,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:37,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:37,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126116212] [2025-01-10 01:12:37,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126116212] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:37,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518015218] [2025-01-10 01:12:37,682 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:12:37,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:37,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:37,684 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) [2025-01-10 01:12:37,686 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 [2025-01-10 01:12:37,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-10 01:12:37,743 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-10 01:12:37,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:12:37,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:37,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-01-10 01:12:37,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-01-10 01:12:37,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:38,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:12:38,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-01-10 01:12:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-10 01:12:38,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518015218] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:38,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:38,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2025-01-10 01:12:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659988839] [2025-01-10 01:12:38,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:38,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-01-10 01:12:38,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:38,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-01-10 01:12:38,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2025-01-10 01:12:38,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:12:38,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 927 transitions, 14345 flow. Second operand has 36 states, 36 states have (on average 8.027777777777779) internal successors, (289), 36 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:38,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:38,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:12:38,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:40,130 INFO L124 PetriNetUnfolderBase]: 3961/6906 cut-off events. [2025-01-10 01:12:40,130 INFO L125 PetriNetUnfolderBase]: For 101953/101953 co-relation queries the response was YES. [2025-01-10 01:12:40,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48743 conditions, 6906 events. 3961/6906 cut-off events. For 101953/101953 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 45288 event pairs, 387 based on Foata normal form. 1/6907 useless extension candidates. Maximal degree in co-relation 48578. Up to 4144 conditions per place. [2025-01-10 01:12:40,195 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 596 selfloop transitions, 449 changer transitions 41/1087 dead transitions. [2025-01-10 01:12:40,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1087 transitions, 17909 flow [2025-01-10 01:12:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-10 01:12:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-01-10 01:12:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 328 transitions. [2025-01-10 01:12:40,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30036630036630035 [2025-01-10 01:12:40,197 INFO L175 Difference]: Start difference. First operand has 344 places, 927 transitions, 14345 flow. Second operand 28 states and 328 transitions. [2025-01-10 01:12:40,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1087 transitions, 17909 flow [2025-01-10 01:12:41,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1087 transitions, 17841 flow, removed 10 selfloop flow, removed 8 redundant places. [2025-01-10 01:12:41,396 INFO L231 Difference]: Finished difference. Result has 367 places, 944 transitions, 16020 flow [2025-01-10 01:12:41,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=14292, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=16020, PETRI_PLACES=367, PETRI_TRANSITIONS=944} [2025-01-10 01:12:41,397 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 328 predicate places. [2025-01-10 01:12:41,397 INFO L471 AbstractCegarLoop]: Abstraction has has 367 places, 944 transitions, 16020 flow [2025-01-10 01:12:41,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.027777777777779) internal successors, (289), 36 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:41,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:41,398 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:41,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-10 01:12:41,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:41,598 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:41,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:41,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1845378054, now seen corresponding path program 8 times [2025-01-10 01:12:41,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:41,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64455969] [2025-01-10 01:12:41,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:12:41,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:41,604 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-10 01:12:41,611 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:12:41,612 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:12:41,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:41,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:41,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64455969] [2025-01-10 01:12:41,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64455969] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:41,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259081142] [2025-01-10 01:12:41,714 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:12:41,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:41,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:41,716 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) [2025-01-10 01:12:41,718 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 [2025-01-10 01:12:41,754 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-10 01:12:41,771 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:12:41,771 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:12:41,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:41,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:12:41,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:41,867 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:41,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259081142] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:41,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:41,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2025-01-10 01:12:41,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031550042] [2025-01-10 01:12:41,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:41,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-10 01:12:41,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:41,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-10 01:12:41,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2025-01-10 01:12:42,002 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-01-10 01:12:42,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 944 transitions, 16020 flow. Second operand has 19 states, 19 states have (on average 12.421052631578947) internal successors, (236), 19 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:42,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:42,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-01-10 01:12:42,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:43,376 INFO L124 PetriNetUnfolderBase]: 2770/5646 cut-off events. [2025-01-10 01:12:43,376 INFO L125 PetriNetUnfolderBase]: For 101158/101303 co-relation queries the response was YES. [2025-01-10 01:12:43,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42195 conditions, 5646 events. 2770/5646 cut-off events. For 101158/101303 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43910 event pairs, 229 based on Foata normal form. 272/5876 useless extension candidates. Maximal degree in co-relation 42020. Up to 1767 conditions per place. [2025-01-10 01:12:43,430 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 351 selfloop transitions, 86 changer transitions 393/1029 dead transitions. [2025-01-10 01:12:43,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1029 transitions, 17207 flow [2025-01-10 01:12:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-10 01:12:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-10 01:12:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 243 transitions. [2025-01-10 01:12:43,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44505494505494503 [2025-01-10 01:12:43,431 INFO L175 Difference]: Start difference. First operand has 367 places, 944 transitions, 16020 flow. Second operand 14 states and 243 transitions. [2025-01-10 01:12:43,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1029 transitions, 17207 flow [2025-01-10 01:12:44,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1029 transitions, 17120 flow, removed 30 selfloop flow, removed 10 redundant places. [2025-01-10 01:12:44,424 INFO L231 Difference]: Finished difference. Result has 367 places, 521 transitions, 8980 flow [2025-01-10 01:12:44,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=14279, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8980, PETRI_PLACES=367, PETRI_TRANSITIONS=521} [2025-01-10 01:12:44,425 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 328 predicate places. [2025-01-10 01:12:44,425 INFO L471 AbstractCegarLoop]: Abstraction has has 367 places, 521 transitions, 8980 flow [2025-01-10 01:12:44,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.421052631578947) internal successors, (236), 19 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:44,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:44,425 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:44,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-10 01:12:44,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:44,626 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:44,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:44,626 INFO L85 PathProgramCache]: Analyzing trace with hash -865861554, now seen corresponding path program 9 times [2025-01-10 01:12:44,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:44,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839472008] [2025-01-10 01:12:44,626 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:12:44,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:44,630 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 3 equivalence classes. [2025-01-10 01:12:44,636 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 30 of 32 statements. [2025-01-10 01:12:44,636 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:12:44,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:12:44,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:44,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839472008] [2025-01-10 01:12:44,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839472008] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:44,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711560913] [2025-01-10 01:12:44,714 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:12:44,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:44,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:44,716 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) [2025-01-10 01:12:44,718 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 [2025-01-10 01:12:44,753 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 3 equivalence classes. [2025-01-10 01:12:44,770 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 30 of 32 statements. [2025-01-10 01:12:44,770 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:12:44,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:44,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-10 01:12:44,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:12:44,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:44,833 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-01-10 01:12:44,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2025-01-10 01:12:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:12:44,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711560913] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:44,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:44,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2025-01-10 01:12:44,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32652418] [2025-01-10 01:12:44,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:44,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:12:44,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:44,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:12:44,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:12:44,856 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2025-01-10 01:12:44,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 521 transitions, 8980 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:44,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:44,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2025-01-10 01:12:44,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:45,698 INFO L124 PetriNetUnfolderBase]: 2106/4018 cut-off events. [2025-01-10 01:12:45,698 INFO L125 PetriNetUnfolderBase]: For 108240/108251 co-relation queries the response was YES. [2025-01-10 01:12:45,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32861 conditions, 4018 events. 2106/4018 cut-off events. For 108240/108251 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 26091 event pairs, 109 based on Foata normal form. 284/4293 useless extension candidates. Maximal degree in co-relation 32757. Up to 1260 conditions per place. [2025-01-10 01:12:45,734 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 256 selfloop transitions, 69 changer transitions 366/738 dead transitions. [2025-01-10 01:12:45,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 738 transitions, 13621 flow [2025-01-10 01:12:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-10 01:12:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-01-10 01:12:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 239 transitions. [2025-01-10 01:12:45,735 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40854700854700854 [2025-01-10 01:12:45,735 INFO L175 Difference]: Start difference. First operand has 367 places, 521 transitions, 8980 flow. Second operand 15 states and 239 transitions. [2025-01-10 01:12:45,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 738 transitions, 13621 flow [2025-01-10 01:12:46,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 738 transitions, 13095 flow, removed 101 selfloop flow, removed 51 redundant places. [2025-01-10 01:12:46,231 INFO L231 Difference]: Finished difference. Result has 275 places, 220 transitions, 4232 flow [2025-01-10 01:12:46,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8349, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4232, PETRI_PLACES=275, PETRI_TRANSITIONS=220} [2025-01-10 01:12:46,231 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 236 predicate places. [2025-01-10 01:12:46,232 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 220 transitions, 4232 flow [2025-01-10 01:12:46,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:46,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:46,232 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:46,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-10 01:12:46,432 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 [2025-01-10 01:12:46,432 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:46,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2103399438, now seen corresponding path program 10 times [2025-01-10 01:12:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:46,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535785143] [2025-01-10 01:12:46,433 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:12:46,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:46,437 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-01-10 01:12:46,445 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-01-10 01:12:46,445 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:12:46,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-10 01:12:46,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:46,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535785143] [2025-01-10 01:12:46,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535785143] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:46,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003956279] [2025-01-10 01:12:46,485 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:12:46,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:46,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:46,486 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) [2025-01-10 01:12:46,488 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 [2025-01-10 01:12:46,525 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-01-10 01:12:46,545 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-01-10 01:12:46,546 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:12:46,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:46,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:12:46,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-10 01:12:46,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-10 01:12:46,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003956279] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:46,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:46,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2025-01-10 01:12:46,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712936837] [2025-01-10 01:12:46,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:46,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 01:12:46,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:46,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 01:12:46,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:12:46,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-01-10 01:12:46,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 220 transitions, 4232 flow. Second operand has 10 states, 10 states have (on average 14.1) internal successors, (141), 10 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:46,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:46,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-01-10 01:12:46,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:47,077 INFO L124 PetriNetUnfolderBase]: 1719/3335 cut-off events. [2025-01-10 01:12:47,077 INFO L125 PetriNetUnfolderBase]: For 44323/44365 co-relation queries the response was YES. [2025-01-10 01:12:47,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27955 conditions, 3335 events. 1719/3335 cut-off events. For 44323/44365 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 20193 event pairs, 142 based on Foata normal form. 42/3353 useless extension candidates. Maximal degree in co-relation 27879. Up to 1427 conditions per place. [2025-01-10 01:12:47,109 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 181 selfloop transitions, 94 changer transitions 8/354 dead transitions. [2025-01-10 01:12:47,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 354 transitions, 6878 flow [2025-01-10 01:12:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:12:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:12:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2025-01-10 01:12:47,110 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5743589743589743 [2025-01-10 01:12:47,110 INFO L175 Difference]: Start difference. First operand has 275 places, 220 transitions, 4232 flow. Second operand 5 states and 112 transitions. [2025-01-10 01:12:47,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 354 transitions, 6878 flow [2025-01-10 01:12:47,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 354 transitions, 5885 flow, removed 207 selfloop flow, removed 33 redundant places. [2025-01-10 01:12:47,340 INFO L231 Difference]: Finished difference. Result has 176 places, 270 transitions, 4814 flow [2025-01-10 01:12:47,340 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4814, PETRI_PLACES=176, PETRI_TRANSITIONS=270} [2025-01-10 01:12:47,341 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 137 predicate places. [2025-01-10 01:12:47,341 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 270 transitions, 4814 flow [2025-01-10 01:12:47,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.1) internal successors, (141), 10 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:47,341 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:47,341 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:47,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-10 01:12:47,541 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 [2025-01-10 01:12:47,541 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:47,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:47,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1354713287, now seen corresponding path program 11 times [2025-01-10 01:12:47,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475748] [2025-01-10 01:12:47,542 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:12:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:47,549 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-01-10 01:12:47,559 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-01-10 01:12:47,559 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-10 01:12:47,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:48,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475748] [2025-01-10 01:12:48,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475748] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093733140] [2025-01-10 01:12:48,502 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:12:48,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:48,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:48,504 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) [2025-01-10 01:12:48,505 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 [2025-01-10 01:12:48,541 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-01-10 01:12:48,559 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-01-10 01:12:48,559 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-10 01:12:48,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:48,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-01-10 01:12:48,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:49,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:49,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:12:49,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2025-01-10 01:12:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:49,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093733140] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:49,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:49,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 56 [2025-01-10 01:12:49,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826458406] [2025-01-10 01:12:49,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:49,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-01-10 01:12:49,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:49,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-01-10 01:12:49,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=2828, Unknown=0, NotChecked=0, Total=3192 [2025-01-10 01:12:49,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:12:49,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 270 transitions, 4814 flow. Second operand has 57 states, 57 states have (on average 7.824561403508772) internal successors, (446), 57 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:49,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:49,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:12:49,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:12:54,145 INFO L124 PetriNetUnfolderBase]: 3504/6173 cut-off events. [2025-01-10 01:12:54,145 INFO L125 PetriNetUnfolderBase]: For 57781/57781 co-relation queries the response was YES. [2025-01-10 01:12:54,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46523 conditions, 6173 events. 3504/6173 cut-off events. For 57781/57781 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 38045 event pairs, 218 based on Foata normal form. 217/6390 useless extension candidates. Maximal degree in co-relation 46460. Up to 2306 conditions per place. [2025-01-10 01:12:54,185 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 318 selfloop transitions, 239 changer transitions 192/750 dead transitions. [2025-01-10 01:12:54,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 750 transitions, 12375 flow [2025-01-10 01:12:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-01-10 01:12:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2025-01-10 01:12:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 801 transitions. [2025-01-10 01:12:54,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2934065934065934 [2025-01-10 01:12:54,187 INFO L175 Difference]: Start difference. First operand has 176 places, 270 transitions, 4814 flow. Second operand 70 states and 801 transitions. [2025-01-10 01:12:54,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 750 transitions, 12375 flow [2025-01-10 01:12:54,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 750 transitions, 11788 flow, removed 49 selfloop flow, removed 4 redundant places. [2025-01-10 01:12:54,539 INFO L231 Difference]: Finished difference. Result has 270 places, 373 transitions, 7349 flow [2025-01-10 01:12:54,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=7349, PETRI_PLACES=270, PETRI_TRANSITIONS=373} [2025-01-10 01:12:54,540 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 231 predicate places. [2025-01-10 01:12:54,540 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 373 transitions, 7349 flow [2025-01-10 01:12:54,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 7.824561403508772) internal successors, (446), 57 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:54,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:12:54,540 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:12:54,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-10 01:12:54,740 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 [2025-01-10 01:12:54,741 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:12:54,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:12:54,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1320697989, now seen corresponding path program 12 times [2025-01-10 01:12:54,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:12:54,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883456538] [2025-01-10 01:12:54,741 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:12:54,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:12:54,747 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-01-10 01:12:54,761 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-01-10 01:12:54,761 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-01-10 01:12:54,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:55,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:12:55,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883456538] [2025-01-10 01:12:55,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883456538] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:12:55,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798945159] [2025-01-10 01:12:55,618 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:12:55,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:12:55,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:12:55,620 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) [2025-01-10 01:12:55,621 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 [2025-01-10 01:12:55,657 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-01-10 01:12:55,677 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-01-10 01:12:55,677 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-01-10 01:12:55,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:12:55,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-10 01:12:55,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:12:56,172 INFO L349 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2025-01-10 01:12:56,172 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 18 [2025-01-10 01:12:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:56,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:12:56,822 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-01-10 01:12:56,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2025-01-10 01:12:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:12:57,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798945159] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:12:57,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:12:57,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 56 [2025-01-10 01:12:57,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333335135] [2025-01-10 01:12:57,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:12:57,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-01-10 01:12:57,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:12:57,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-01-10 01:12:57,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2025-01-10 01:12:57,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:12:57,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 373 transitions, 7349 flow. Second operand has 57 states, 57 states have (on average 7.824561403508772) internal successors, (446), 57 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:12:57,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:12:57,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:12:57,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:13:04,967 INFO L124 PetriNetUnfolderBase]: 3079/5384 cut-off events. [2025-01-10 01:13:04,967 INFO L125 PetriNetUnfolderBase]: For 71915/71915 co-relation queries the response was YES. [2025-01-10 01:13:04,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44072 conditions, 5384 events. 3079/5384 cut-off events. For 71915/71915 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 31514 event pairs, 567 based on Foata normal form. 1/5385 useless extension candidates. Maximal degree in co-relation 43976. Up to 1982 conditions per place. [2025-01-10 01:13:05,015 INFO L140 encePairwiseOnDemand]: 22/39 looper letters, 293 selfloop transitions, 369 changer transitions 38/701 dead transitions. [2025-01-10 01:13:05,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 701 transitions, 12161 flow [2025-01-10 01:13:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2025-01-10 01:13:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2025-01-10 01:13:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 839 transitions. [2025-01-10 01:13:05,017 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.26559037670148783 [2025-01-10 01:13:05,017 INFO L175 Difference]: Start difference. First operand has 270 places, 373 transitions, 7349 flow. Second operand 81 states and 839 transitions. [2025-01-10 01:13:05,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 701 transitions, 12161 flow [2025-01-10 01:13:05,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 701 transitions, 11567 flow, removed 253 selfloop flow, removed 28 redundant places. [2025-01-10 01:13:05,469 INFO L231 Difference]: Finished difference. Result has 324 places, 493 transitions, 10054 flow [2025-01-10 01:13:05,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6985, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=10054, PETRI_PLACES=324, PETRI_TRANSITIONS=493} [2025-01-10 01:13:05,470 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 285 predicate places. [2025-01-10 01:13:05,470 INFO L471 AbstractCegarLoop]: Abstraction has has 324 places, 493 transitions, 10054 flow [2025-01-10 01:13:05,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 7.824561403508772) internal successors, (446), 57 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:13:05,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:13:05,470 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:13:05,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-10 01:13:05,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-01-10 01:13:05,671 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:13:05,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:13:05,671 INFO L85 PathProgramCache]: Analyzing trace with hash -717971847, now seen corresponding path program 13 times [2025-01-10 01:13:05,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:13:05,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84522388] [2025-01-10 01:13:05,672 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:13:05,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:13:05,676 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-10 01:13:05,684 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-10 01:13:05,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:13:05,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:13:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:13:06,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:13:06,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84522388] [2025-01-10 01:13:06,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84522388] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:13:06,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551140629] [2025-01-10 01:13:06,452 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:13:06,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:13:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:13:06,454 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:13:06,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-10 01:13:06,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-10 01:13:06,508 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-10 01:13:06,508 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:13:06,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:13:06,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-01-10 01:13:06,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:13:07,017 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:13:07,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2025-01-10 01:13:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:13:07,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:13:07,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 01:13:07,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2025-01-10 01:13:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:13:08,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551140629] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:13:08,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:13:08,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 57 [2025-01-10 01:13:08,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370869149] [2025-01-10 01:13:08,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:13:08,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-01-10 01:13:08,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:13:08,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-01-10 01:13:08,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2935, Unknown=0, NotChecked=0, Total=3306 [2025-01-10 01:13:08,126 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:13:08,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 493 transitions, 10054 flow. Second operand has 58 states, 58 states have (on average 7.793103448275862) internal successors, (452), 58 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:13:08,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:13:08,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:13:08,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:13:18,897 INFO L124 PetriNetUnfolderBase]: 5304/9170 cut-off events. [2025-01-10 01:13:18,897 INFO L125 PetriNetUnfolderBase]: For 147129/147129 co-relation queries the response was YES. [2025-01-10 01:13:18,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81997 conditions, 9170 events. 5304/9170 cut-off events. For 147129/147129 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 57442 event pairs, 256 based on Foata normal form. 107/9277 useless extension candidates. Maximal degree in co-relation 81898. Up to 3163 conditions per place. [2025-01-10 01:13:18,986 INFO L140 encePairwiseOnDemand]: 23/39 looper letters, 478 selfloop transitions, 707 changer transitions 129/1315 dead transitions. [2025-01-10 01:13:18,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 1315 transitions, 26594 flow [2025-01-10 01:13:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2025-01-10 01:13:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2025-01-10 01:13:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 1577 transitions. [2025-01-10 01:13:18,989 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2827685135377443 [2025-01-10 01:13:18,989 INFO L175 Difference]: Start difference. First operand has 324 places, 493 transitions, 10054 flow. Second operand 143 states and 1577 transitions. [2025-01-10 01:13:18,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 1315 transitions, 26594 flow [2025-01-10 01:13:20,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1315 transitions, 25322 flow, removed 336 selfloop flow, removed 29 redundant places. [2025-01-10 01:13:20,190 INFO L231 Difference]: Finished difference. Result has 481 places, 879 transitions, 20280 flow [2025-01-10 01:13:20,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9283, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=20280, PETRI_PLACES=481, PETRI_TRANSITIONS=879} [2025-01-10 01:13:20,191 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 442 predicate places. [2025-01-10 01:13:20,191 INFO L471 AbstractCegarLoop]: Abstraction has has 481 places, 879 transitions, 20280 flow [2025-01-10 01:13:20,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 7.793103448275862) internal successors, (452), 58 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:13:20,192 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:13:20,192 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:13:20,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-01-10 01:13:20,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:13:20,392 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 01:13:20,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:13:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1438205711, now seen corresponding path program 14 times [2025-01-10 01:13:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:13:20,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537209699] [2025-01-10 01:13:20,393 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:13:20,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:13:20,398 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-01-10 01:13:20,410 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-01-10 01:13:20,410 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:13:20,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:13:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:13:21,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:13:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537209699] [2025-01-10 01:13:21,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537209699] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:13:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153335464] [2025-01-10 01:13:21,293 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:13:21,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:13:21,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:13:21,295 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:13:21,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-10 01:13:21,338 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-01-10 01:13:21,357 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-01-10 01:13:21,357 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:13:21,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:13:21,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-01-10 01:13:21,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:13:22,077 INFO L349 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2025-01-10 01:13:22,077 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 20 [2025-01-10 01:13:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:13:22,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:13:22,902 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-01-10 01:13:22,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2025-01-10 01:13:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:13:23,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153335464] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:13:23,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:13:23,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 56 [2025-01-10 01:13:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164226242] [2025-01-10 01:13:23,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:13:23,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-01-10 01:13:23,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:13:23,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-01-10 01:13:23,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2924, Unknown=0, NotChecked=0, Total=3192 [2025-01-10 01:13:23,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-01-10 01:13:23,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 879 transitions, 20280 flow. Second operand has 57 states, 57 states have (on average 7.824561403508772) internal successors, (446), 57 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:13:23,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:13:23,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-01-10 01:13:23,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand