./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d 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/parallel-min-max-1.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 bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:36:53,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:36:53,337 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:36:53,344 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:36:53,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:36:53,373 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:36:53,374 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:36:53,374 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:36:53,375 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:36:53,375 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:36:53,376 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:36:53,376 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:36:53,376 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:36:53,376 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:36:53,376 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:36:53,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:36:53,376 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:36:53,376 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:36:53,377 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:36:53,377 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:36:53,377 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:36:53,377 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:36:53,378 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:36:53,378 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:36:53,378 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:36:53,378 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:36:53,378 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:36:53,378 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:36:53,378 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:36:53,379 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:36:53,379 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:36:53,379 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:36:53,379 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:36:53,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:36:53,380 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:36:53,380 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:36:53,380 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:36:53,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:36:53,380 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:36:53,380 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:36:53,380 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:36:53,380 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:36:53,380 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 -> bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 [2025-02-08 08:36:53,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:36:53,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:36:53,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:36:53,714 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:36:53,715 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:36:53,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2025-02-08 08:36:55,075 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c1c334929/4d9eab4f2c5a4d9c8f6e940796717bdf/FLAG8088b2dc2 [2025-02-08 08:36:55,347 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:36:55,348 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2025-02-08 08:36:55,369 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c1c334929/4d9eab4f2c5a4d9c8f6e940796717bdf/FLAG8088b2dc2 [2025-02-08 08:36:55,654 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c1c334929/4d9eab4f2c5a4d9c8f6e940796717bdf [2025-02-08 08:36:55,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:36:55,658 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:36:55,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:36:55,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:36:55,664 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:36:55,665 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fab4346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55, skipping insertion in model container [2025-02-08 08:36:55,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,684 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:36:55,845 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-08 08:36:55,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:36:55,858 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:36:55,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:36:55,908 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:36:55,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55 WrapperNode [2025-02-08 08:36:55,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:36:55,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:36:55,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:36:55,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:36:55,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,948 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 119 [2025-02-08 08:36:55,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:36:55,949 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:36:55,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:36:55,952 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:36:55,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,963 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,981 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-08 08:36:55,982 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,988 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,990 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,991 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,993 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:36:55,994 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:36:55,994 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:36:55,994 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:36:55,995 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (1/1) ... [2025-02-08 08:36:55,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:36:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:56,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 08:36:56,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 08:36:56,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:36:56,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:36:56,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:36:56,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:36:56,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:36:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:36:56,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:36:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:36:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:36:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:36:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:36:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:36:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:36:56,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:36:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:36:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:36:56,042 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:36:56,158 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:36:56,160 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:36:56,554 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:36:56,555 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:36:56,724 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:36:56,726 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:36:56,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:36:56 BoogieIcfgContainer [2025-02-08 08:36:56,726 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:36:56,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:36:56,729 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:36:56,733 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:36:56,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:36:55" (1/3) ... [2025-02-08 08:36:56,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f58bcd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:36:56, skipping insertion in model container [2025-02-08 08:36:56,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:36:55" (2/3) ... [2025-02-08 08:36:56,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f58bcd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:36:56, skipping insertion in model container [2025-02-08 08:36:56,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:36:56" (3/3) ... [2025-02-08 08:36:56,738 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2025-02-08 08:36:56,753 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:36:56,754 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-min-max-1.wvr.c that has 4 procedures, 79 locations, 1 initial locations, 3 loop locations, and 18 error locations. [2025-02-08 08:36:56,755 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:36:56,835 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:36:56,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 84 transitions, 189 flow [2025-02-08 08:36:56,902 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2025-02-08 08:36:56,905 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:36:56,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 81 events. 6/81 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 171 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2025-02-08 08:36:56,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 84 transitions, 189 flow [2025-02-08 08:36:56,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 80 transitions, 178 flow [2025-02-08 08:36:56,925 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:36:56,935 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;@21435a9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:36:56,935 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2025-02-08 08:36:56,948 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:36:56,948 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2025-02-08 08:36:56,948 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:36:56,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:56,950 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:56,950 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:36:56,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2076134823, now seen corresponding path program 1 times [2025-02-08 08:36:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895944754] [2025-02-08 08:36:56,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:57,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:36:57,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:36:57,081 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:57,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:36:57,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:57,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895944754] [2025-02-08 08:36:57,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895944754] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:57,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:57,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:36:57,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224776843] [2025-02-08 08:36:57,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:57,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:36:57,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:57,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:36:57,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:36:57,371 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-02-08 08:36:57,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:36:57,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:57,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-02-08 08:36:57,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:57,848 INFO L124 PetriNetUnfolderBase]: 1210/2180 cut-off events. [2025-02-08 08:36:57,848 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2025-02-08 08:36:57,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3975 conditions, 2180 events. 1210/2180 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13666 event pairs, 755 based on Foata normal form. 1/1647 useless extension candidates. Maximal degree in co-relation 3755. Up to 1649 conditions per place. [2025-02-08 08:36:57,878 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 42 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2025-02-08 08:36:57,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 260 flow [2025-02-08 08:36:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:36:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:36:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2025-02-08 08:36:57,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2025-02-08 08:36:57,897 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 178 flow. Second operand 3 states and 157 transitions. [2025-02-08 08:36:57,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 260 flow [2025-02-08 08:36:57,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 77 transitions, 248 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:36:57,916 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 164 flow [2025-02-08 08:36:57,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2025-02-08 08:36:57,923 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2025-02-08 08:36:57,923 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 164 flow [2025-02-08 08:36:57,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:36:57,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:57,924 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:57,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:36:57,924 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:36:57,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2076134824, now seen corresponding path program 1 times [2025-02-08 08:36:57,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:57,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597612929] [2025-02-08 08:36:57,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:57,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:57,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:36:57,989 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:36:57,989 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:57,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:36:58,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:58,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597612929] [2025-02-08 08:36:58,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597612929] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:58,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:36:58,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-08 08:36:58,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490319933] [2025-02-08 08:36:58,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:58,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:36:58,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:58,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:36:58,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-08 08:36:58,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-02-08 08:36:58,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 39.142857142857146) internal successors, (274), 7 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:36:58,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:58,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-02-08 08:36:58,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:58,930 INFO L124 PetriNetUnfolderBase]: 1210/2182 cut-off events. [2025-02-08 08:36:58,930 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-02-08 08:36:58,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3898 conditions, 2182 events. 1210/2182 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13676 event pairs, 755 based on Foata normal form. 1/1649 useless extension candidates. Maximal degree in co-relation 3855. Up to 1646 conditions per place. [2025-02-08 08:36:58,969 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 42 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2025-02-08 08:36:58,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 79 transitions, 262 flow [2025-02-08 08:36:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:36:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:36:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 271 transitions. [2025-02-08 08:36:58,975 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5376984126984127 [2025-02-08 08:36:58,976 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 164 flow. Second operand 6 states and 271 transitions. [2025-02-08 08:36:58,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 79 transitions, 262 flow [2025-02-08 08:36:58,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:36:58,981 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 180 flow [2025-02-08 08:36:58,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2025-02-08 08:36:58,982 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-02-08 08:36:58,982 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 180 flow [2025-02-08 08:36:58,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.142857142857146) internal successors, (274), 7 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:36:58,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:58,983 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:58,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:36:58,984 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:36:58,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1994213376, now seen corresponding path program 1 times [2025-02-08 08:36:58,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:58,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380109628] [2025-02-08 08:36:58,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:58,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:58,995 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:36:59,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:36:59,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:59,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:36:59,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:59,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380109628] [2025-02-08 08:36:59,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380109628] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:59,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349883438] [2025-02-08 08:36:59,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:59,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:59,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:59,360 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:36:59,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 08:36:59,415 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:36:59,432 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:36:59,432 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:59,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:59,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-08 08:36:59,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:59,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:36:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:36:59,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:36:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:36:59,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349883438] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:36:59,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:36:59,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-02-08 08:36:59,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692164210] [2025-02-08 08:36:59,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:36:59,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:36:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:59,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:36:59,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:37:00,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-02-08 08:37:00,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 180 flow. Second operand has 15 states, 15 states have (on average 39.333333333333336) internal successors, (590), 15 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:00,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:00,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-02-08 08:37:00,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:01,268 INFO L124 PetriNetUnfolderBase]: 1210/2181 cut-off events. [2025-02-08 08:37:01,268 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-08 08:37:01,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3903 conditions, 2181 events. 1210/2181 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13762 event pairs, 755 based on Foata normal form. 0/1648 useless extension candidates. Maximal degree in co-relation 3863. Up to 1646 conditions per place. [2025-02-08 08:37:01,308 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 37 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2025-02-08 08:37:01,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 270 flow [2025-02-08 08:37:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:37:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:37:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 343 transitions. [2025-02-08 08:37:01,311 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2025-02-08 08:37:01,311 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 180 flow. Second operand 8 states and 343 transitions. [2025-02-08 08:37:01,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 270 flow [2025-02-08 08:37:01,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 78 transitions, 262 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:37:01,313 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 188 flow [2025-02-08 08:37:01,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=188, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2025-02-08 08:37:01,314 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-02-08 08:37:01,314 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 188 flow [2025-02-08 08:37:01,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 39.333333333333336) internal successors, (590), 15 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:01,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:01,315 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:01,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 08:37:01,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:01,516 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:01,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1691073447, now seen corresponding path program 1 times [2025-02-08 08:37:01,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687746770] [2025-02-08 08:37:01,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:01,525 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:37:01,531 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:37:01,532 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:01,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:37:01,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:01,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687746770] [2025-02-08 08:37:01,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687746770] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:01,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:37:01,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:37:01,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858919666] [2025-02-08 08:37:01,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:01,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:37:01,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:01,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:37:01,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:37:01,644 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 84 [2025-02-08 08:37:01,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:01,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:01,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 84 [2025-02-08 08:37:01,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:01,951 INFO L124 PetriNetUnfolderBase]: 2007/3320 cut-off events. [2025-02-08 08:37:01,953 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-02-08 08:37:01,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6293 conditions, 3320 events. 2007/3320 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18980 event pairs, 1538 based on Foata normal form. 0/3070 useless extension candidates. Maximal degree in co-relation 6240. Up to 2835 conditions per place. [2025-02-08 08:37:01,978 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 50 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2025-02-08 08:37:01,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 278 flow [2025-02-08 08:37:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:37:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:37:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2025-02-08 08:37:01,980 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2025-02-08 08:37:01,981 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 188 flow. Second operand 4 states and 153 transitions. [2025-02-08 08:37:01,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 278 flow [2025-02-08 08:37:01,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 252 flow, removed 2 selfloop flow, removed 7 redundant places. [2025-02-08 08:37:01,984 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 152 flow [2025-02-08 08:37:01,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2025-02-08 08:37:01,987 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -12 predicate places. [2025-02-08 08:37:01,987 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 152 flow [2025-02-08 08:37:01,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:01,987 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:01,987 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:01,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:37:01,988 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:01,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1691073446, now seen corresponding path program 1 times [2025-02-08 08:37:01,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:01,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733357316] [2025-02-08 08:37:01,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:01,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:01,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:37:02,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:37:02,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:02,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:37:02,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:02,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733357316] [2025-02-08 08:37:02,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733357316] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:02,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287757701] [2025-02-08 08:37:02,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:02,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:02,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:02,108 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:02,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 08:37:02,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:37:02,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:37:02,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:02,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:02,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-08 08:37:02,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:02,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:37:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:37:02,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:37:02,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287757701] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:02,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:37:02,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-02-08 08:37:02,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178347557] [2025-02-08 08:37:02,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:02,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:37:02,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:02,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:37:02,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:37:02,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 84 [2025-02-08 08:37:02,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:02,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:02,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 84 [2025-02-08 08:37:02,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:02,630 INFO L124 PetriNetUnfolderBase]: 1404/2461 cut-off events. [2025-02-08 08:37:02,630 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-08 08:37:02,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4478 conditions, 2461 events. 1404/2461 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14546 event pairs, 938 based on Foata normal form. 0/1940 useless extension candidates. Maximal degree in co-relation 4437. Up to 1930 conditions per place. [2025-02-08 08:37:02,645 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 45 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2025-02-08 08:37:02,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 242 flow [2025-02-08 08:37:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:37:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:37:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2025-02-08 08:37:02,646 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2025-02-08 08:37:02,646 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 152 flow. Second operand 5 states and 216 transitions. [2025-02-08 08:37:02,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 242 flow [2025-02-08 08:37:02,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:37:02,648 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 149 flow [2025-02-08 08:37:02,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2025-02-08 08:37:02,649 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -13 predicate places. [2025-02-08 08:37:02,649 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 149 flow [2025-02-08 08:37:02,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:02,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:02,649 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:02,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 08:37:02,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:02,850 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:02,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1506205683, now seen corresponding path program 1 times [2025-02-08 08:37:02,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:02,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326698544] [2025-02-08 08:37:02,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:02,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:02,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 08:37:02,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:37:02,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:02,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:37:02,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326698544] [2025-02-08 08:37:02,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326698544] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:02,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:37:02,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:37:02,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754474554] [2025-02-08 08:37:02,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:02,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:37:02,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:02,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:37:02,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:37:02,906 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-02-08 08:37:02,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:02,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:02,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-02-08 08:37:02,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:03,081 INFO L124 PetriNetUnfolderBase]: 1209/2052 cut-off events. [2025-02-08 08:37:03,081 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-02-08 08:37:03,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3771 conditions, 2052 events. 1209/2052 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11987 event pairs, 755 based on Foata normal form. 1/1648 useless extension candidates. Maximal degree in co-relation 3728. Up to 1655 conditions per place. [2025-02-08 08:37:03,093 INFO L140 encePairwiseOnDemand]: 82/84 looper letters, 47 selfloop transitions, 0 changer transitions 1/68 dead transitions. [2025-02-08 08:37:03,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 245 flow [2025-02-08 08:37:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:37:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:37:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2025-02-08 08:37:03,094 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2025-02-08 08:37:03,094 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 149 flow. Second operand 3 states and 155 transitions. [2025-02-08 08:37:03,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 245 flow [2025-02-08 08:37:03,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 240 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:37:03,096 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 144 flow [2025-02-08 08:37:03,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2025-02-08 08:37:03,097 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -13 predicate places. [2025-02-08 08:37:03,097 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 144 flow [2025-02-08 08:37:03,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:03,097 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:03,097 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:03,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:37:03,097 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:03,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:03,097 INFO L85 PathProgramCache]: Analyzing trace with hash -871432967, now seen corresponding path program 1 times [2025-02-08 08:37:03,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:03,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979849850] [2025-02-08 08:37:03,098 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:03,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:03,106 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 08:37:03,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 08:37:03,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:03,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:37:03,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:03,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979849850] [2025-02-08 08:37:03,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979849850] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:03,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:37:03,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:37:03,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841575059] [2025-02-08 08:37:03,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:03,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:37:03,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:03,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:37:03,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:37:03,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2025-02-08 08:37:03,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:03,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:03,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2025-02-08 08:37:03,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:03,737 INFO L124 PetriNetUnfolderBase]: 3446/5275 cut-off events. [2025-02-08 08:37:03,737 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-08 08:37:03,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10344 conditions, 5275 events. 3446/5275 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 29176 event pairs, 1908 based on Foata normal form. 0/4757 useless extension candidates. Maximal degree in co-relation 10340. Up to 3432 conditions per place. [2025-02-08 08:37:03,760 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 72 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2025-02-08 08:37:03,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 352 flow [2025-02-08 08:37:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:37:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:37:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 235 transitions. [2025-02-08 08:37:03,763 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4662698412698413 [2025-02-08 08:37:03,763 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 144 flow. Second operand 6 states and 235 transitions. [2025-02-08 08:37:03,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 352 flow [2025-02-08 08:37:03,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 91 transitions, 350 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-08 08:37:03,764 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 171 flow [2025-02-08 08:37:03,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=171, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2025-02-08 08:37:03,765 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2025-02-08 08:37:03,765 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 171 flow [2025-02-08 08:37:03,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:03,769 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:03,770 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:03,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-08 08:37:03,770 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:03,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1699290084, now seen corresponding path program 1 times [2025-02-08 08:37:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:03,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983662694] [2025-02-08 08:37:03,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:03,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:03,777 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 08:37:03,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 08:37:03,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:03,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:37:03,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:03,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983662694] [2025-02-08 08:37:03,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983662694] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:03,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643587804] [2025-02-08 08:37:03,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:03,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:03,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:03,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:03,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 08:37:04,022 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 08:37:04,043 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 08:37:04,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:04,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:04,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 08:37:04,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:37:04,118 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:37:04,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643587804] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:04,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:37:04,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-02-08 08:37:04,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841072087] [2025-02-08 08:37:04,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:04,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:37:04,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:04,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:37:04,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:37:04,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 84 [2025-02-08 08:37:04,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:04,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:04,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 84 [2025-02-08 08:37:04,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:04,582 INFO L124 PetriNetUnfolderBase]: 2866/4843 cut-off events. [2025-02-08 08:37:04,582 INFO L125 PetriNetUnfolderBase]: For 301/416 co-relation queries the response was YES. [2025-02-08 08:37:04,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9772 conditions, 4843 events. 2866/4843 cut-off events. For 301/416 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 30771 event pairs, 1608 based on Foata normal form. 265/4663 useless extension candidates. Maximal degree in co-relation 9767. Up to 3042 conditions per place. [2025-02-08 08:37:04,604 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 70 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2025-02-08 08:37:04,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 373 flow [2025-02-08 08:37:04,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:37:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:37:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2025-02-08 08:37:04,605 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2025-02-08 08:37:04,606 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 171 flow. Second operand 4 states and 190 transitions. [2025-02-08 08:37:04,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 373 flow [2025-02-08 08:37:04,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:37:04,608 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 183 flow [2025-02-08 08:37:04,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2025-02-08 08:37:04,613 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2025-02-08 08:37:04,613 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 183 flow [2025-02-08 08:37:04,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:04,614 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:04,614 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:04,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 08:37:04,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:04,818 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:04,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:04,818 INFO L85 PathProgramCache]: Analyzing trace with hash 44096063, now seen corresponding path program 1 times [2025-02-08 08:37:04,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:04,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730979506] [2025-02-08 08:37:04,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:04,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:04,826 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 08:37:04,835 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:37:04,835 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:04,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:37:04,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:04,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730979506] [2025-02-08 08:37:04,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730979506] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:04,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857511024] [2025-02-08 08:37:04,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:04,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:04,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:04,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:04,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 08:37:05,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 08:37:05,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:37:05,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:05,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:05,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:37:05,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:37:05,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:37:05,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857511024] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:05,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:05,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-08 08:37:05,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500628115] [2025-02-08 08:37:05,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:05,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:37:05,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:05,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:37:05,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:37:05,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-02-08 08:37:05,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 183 flow. Second operand has 14 states, 14 states have (on average 39.07142857142857) internal successors, (547), 14 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:05,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:05,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-02-08 08:37:05,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:06,119 INFO L124 PetriNetUnfolderBase]: 4170/6964 cut-off events. [2025-02-08 08:37:06,120 INFO L125 PetriNetUnfolderBase]: For 725/910 co-relation queries the response was YES. [2025-02-08 08:37:06,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15072 conditions, 6964 events. 4170/6964 cut-off events. For 725/910 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 47817 event pairs, 2294 based on Foata normal form. 235/6540 useless extension candidates. Maximal degree in co-relation 15066. Up to 3360 conditions per place. [2025-02-08 08:37:06,154 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 108 selfloop transitions, 12 changer transitions 0/139 dead transitions. [2025-02-08 08:37:06,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 139 transitions, 611 flow [2025-02-08 08:37:06,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:37:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:37:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 399 transitions. [2025-02-08 08:37:06,157 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2025-02-08 08:37:06,157 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 183 flow. Second operand 8 states and 399 transitions. [2025-02-08 08:37:06,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 139 transitions, 611 flow [2025-02-08 08:37:06,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 139 transitions, 598 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:37:06,161 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 260 flow [2025-02-08 08:37:06,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=260, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2025-02-08 08:37:06,161 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2025-02-08 08:37:06,162 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 260 flow [2025-02-08 08:37:06,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 39.07142857142857) internal successors, (547), 14 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:06,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:06,162 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:06,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 08:37:06,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-08 08:37:06,367 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:06,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash 580186282, now seen corresponding path program 1 times [2025-02-08 08:37:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:06,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324567572] [2025-02-08 08:37:06,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:06,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:06,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-08 08:37:06,386 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 08:37:06,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:06,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:37:06,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:06,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324567572] [2025-02-08 08:37:06,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324567572] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:06,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978452665] [2025-02-08 08:37:06,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:06,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:06,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:06,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:06,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 08:37:06,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-08 08:37:06,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 08:37:06,600 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:06,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:06,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:37:06,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:37:06,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:37:06,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978452665] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:06,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-08 08:37:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471089267] [2025-02-08 08:37:06,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:06,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:37:06,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:06,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:37:06,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:37:06,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-02-08 08:37:06,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 260 flow. Second operand has 14 states, 14 states have (on average 39.214285714285715) internal successors, (549), 14 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:06,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:06,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-02-08 08:37:06,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:07,450 INFO L124 PetriNetUnfolderBase]: 3703/6122 cut-off events. [2025-02-08 08:37:07,450 INFO L125 PetriNetUnfolderBase]: For 2398/2860 co-relation queries the response was YES. [2025-02-08 08:37:07,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13853 conditions, 6122 events. 3703/6122 cut-off events. For 2398/2860 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 40950 event pairs, 2164 based on Foata normal form. 299/5894 useless extension candidates. Maximal degree in co-relation 13843. Up to 3372 conditions per place. [2025-02-08 08:37:07,480 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 103 selfloop transitions, 12 changer transitions 0/135 dead transitions. [2025-02-08 08:37:07,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 135 transitions, 658 flow [2025-02-08 08:37:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:37:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:37:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 397 transitions. [2025-02-08 08:37:07,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5907738095238095 [2025-02-08 08:37:07,482 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 260 flow. Second operand 8 states and 397 transitions. [2025-02-08 08:37:07,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 135 transitions, 658 flow [2025-02-08 08:37:07,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 650 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-02-08 08:37:07,488 INFO L231 Difference]: Finished difference. Result has 94 places, 82 transitions, 317 flow [2025-02-08 08:37:07,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=317, PETRI_PLACES=94, PETRI_TRANSITIONS=82} [2025-02-08 08:37:07,489 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2025-02-08 08:37:07,489 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 82 transitions, 317 flow [2025-02-08 08:37:07,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 39.214285714285715) internal successors, (549), 14 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:07,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:07,490 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:07,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-08 08:37:07,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-08 08:37:07,694 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:07,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:07,695 INFO L85 PathProgramCache]: Analyzing trace with hash 23358183, now seen corresponding path program 2 times [2025-02-08 08:37:07,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:07,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749591864] [2025-02-08 08:37:07,695 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:37:07,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:07,707 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-08 08:37:07,714 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 08:37:07,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:37:07,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:37:07,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:07,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749591864] [2025-02-08 08:37:07,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749591864] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:07,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997459402] [2025-02-08 08:37:07,883 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:37:07,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:07,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:07,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:07,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 08:37:07,933 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-08 08:37:07,953 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 08:37:07,953 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:37:07,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:07,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:37:07,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:08,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-08 08:37:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:37:08,065 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:37:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997459402] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:08,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:37:08,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2025-02-08 08:37:08,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58869959] [2025-02-08 08:37:08,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:08,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:37:08,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:08,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:37:08,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:37:08,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2025-02-08 08:37:08,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 82 transitions, 317 flow. Second operand has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:08,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:08,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2025-02-08 08:37:08,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:08,935 INFO L124 PetriNetUnfolderBase]: 4444/7393 cut-off events. [2025-02-08 08:37:08,935 INFO L125 PetriNetUnfolderBase]: For 3439/3879 co-relation queries the response was YES. [2025-02-08 08:37:08,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17794 conditions, 7393 events. 4444/7393 cut-off events. For 3439/3879 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 49692 event pairs, 1325 based on Foata normal form. 228/7071 useless extension candidates. Maximal degree in co-relation 17780. Up to 2709 conditions per place. [2025-02-08 08:37:08,965 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 152 selfloop transitions, 14 changer transitions 0/184 dead transitions. [2025-02-08 08:37:08,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 184 transitions, 1026 flow [2025-02-08 08:37:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:37:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:37:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 433 transitions. [2025-02-08 08:37:08,967 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5727513227513228 [2025-02-08 08:37:08,967 INFO L175 Difference]: Start difference. First operand has 94 places, 82 transitions, 317 flow. Second operand 9 states and 433 transitions. [2025-02-08 08:37:08,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 184 transitions, 1026 flow [2025-02-08 08:37:08,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 184 transitions, 1001 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-02-08 08:37:08,981 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 353 flow [2025-02-08 08:37:08,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=353, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2025-02-08 08:37:08,982 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 16 predicate places. [2025-02-08 08:37:08,982 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 353 flow [2025-02-08 08:37:08,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:08,982 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:08,982 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:08,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 08:37:09,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-08 08:37:09,183 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:09,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:09,183 INFO L85 PathProgramCache]: Analyzing trace with hash 941325604, now seen corresponding path program 1 times [2025-02-08 08:37:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:09,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41138146] [2025-02-08 08:37:09,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:09,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:09,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-08 08:37:09,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:37:09,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:09,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:09,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41138146] [2025-02-08 08:37:09,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41138146] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071154887] [2025-02-08 08:37:09,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:09,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:09,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:09,385 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:09,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 08:37:09,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-08 08:37:09,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:37:09,454 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:09,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:09,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:37:09,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:09,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:37:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:09,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:09,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071154887] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:09,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:09,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2025-02-08 08:37:09,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057923436] [2025-02-08 08:37:09,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:09,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:37:09,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:09,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:37:09,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:37:10,191 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 84 [2025-02-08 08:37:10,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 353 flow. Second operand has 22 states, 22 states have (on average 28.136363636363637) internal successors, (619), 22 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:10,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:10,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 84 [2025-02-08 08:37:10,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:11,618 INFO L124 PetriNetUnfolderBase]: 8503/12811 cut-off events. [2025-02-08 08:37:11,619 INFO L125 PetriNetUnfolderBase]: For 7741/8511 co-relation queries the response was YES. [2025-02-08 08:37:11,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33658 conditions, 12811 events. 8503/12811 cut-off events. For 7741/8511 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 76386 event pairs, 3210 based on Foata normal form. 632/12652 useless extension candidates. Maximal degree in co-relation 33642. Up to 3398 conditions per place. [2025-02-08 08:37:11,700 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 169 selfloop transitions, 14 changer transitions 0/196 dead transitions. [2025-02-08 08:37:11,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 196 transitions, 1040 flow [2025-02-08 08:37:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:37:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:37:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 425 transitions. [2025-02-08 08:37:11,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2025-02-08 08:37:11,703 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 353 flow. Second operand 10 states and 425 transitions. [2025-02-08 08:37:11,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 196 transitions, 1040 flow [2025-02-08 08:37:11,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 196 transitions, 1016 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:37:11,732 INFO L231 Difference]: Finished difference. Result has 105 places, 88 transitions, 400 flow [2025-02-08 08:37:11,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=400, PETRI_PLACES=105, PETRI_TRANSITIONS=88} [2025-02-08 08:37:11,734 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2025-02-08 08:37:11,734 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 400 flow [2025-02-08 08:37:11,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 28.136363636363637) internal successors, (619), 22 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:11,735 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:11,735 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:11,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 08:37:11,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:11,935 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:11,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2125920082, now seen corresponding path program 2 times [2025-02-08 08:37:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374514556] [2025-02-08 08:37:11,936 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:37:11,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:11,946 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-02-08 08:37:11,960 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:37:11,961 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:37:11,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:37:12,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:12,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374514556] [2025-02-08 08:37:12,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374514556] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:12,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879760385] [2025-02-08 08:37:12,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:37:12,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:12,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:12,256 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:12,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 08:37:12,309 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-02-08 08:37:12,333 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:37:12,333 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:37:12,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:12,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:37:12,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:12,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-08 08:37:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:37:12,462 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:37:12,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879760385] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:12,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:37:12,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2025-02-08 08:37:12,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983578436] [2025-02-08 08:37:12,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:12,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:37:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:12,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:37:12,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:37:12,597 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2025-02-08 08:37:12,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 88 transitions, 400 flow. Second operand has 8 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:12,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:12,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2025-02-08 08:37:12,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:13,322 INFO L124 PetriNetUnfolderBase]: 5200/8417 cut-off events. [2025-02-08 08:37:13,323 INFO L125 PetriNetUnfolderBase]: For 12744/14078 co-relation queries the response was YES. [2025-02-08 08:37:13,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23184 conditions, 8417 events. 5200/8417 cut-off events. For 12744/14078 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 55255 event pairs, 1753 based on Foata normal form. 428/8464 useless extension candidates. Maximal degree in co-relation 23166. Up to 3270 conditions per place. [2025-02-08 08:37:13,369 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 170 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2025-02-08 08:37:13,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 204 transitions, 1382 flow [2025-02-08 08:37:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:37:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:37:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 427 transitions. [2025-02-08 08:37:13,371 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2025-02-08 08:37:13,371 INFO L175 Difference]: Start difference. First operand has 105 places, 88 transitions, 400 flow. Second operand 9 states and 427 transitions. [2025-02-08 08:37:13,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 204 transitions, 1382 flow [2025-02-08 08:37:13,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 204 transitions, 1253 flow, removed 33 selfloop flow, removed 6 redundant places. [2025-02-08 08:37:13,392 INFO L231 Difference]: Finished difference. Result has 109 places, 91 transitions, 412 flow [2025-02-08 08:37:13,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=412, PETRI_PLACES=109, PETRI_TRANSITIONS=91} [2025-02-08 08:37:13,393 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 25 predicate places. [2025-02-08 08:37:13,393 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 91 transitions, 412 flow [2025-02-08 08:37:13,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:13,393 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:13,393 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:13,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 08:37:13,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:13,594 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:13,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1426285233, now seen corresponding path program 1 times [2025-02-08 08:37:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:13,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872136927] [2025-02-08 08:37:13,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:13,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:13,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-08 08:37:13,609 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-08 08:37:13,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:13,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:13,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:13,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872136927] [2025-02-08 08:37:13,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872136927] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:13,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807695079] [2025-02-08 08:37:13,776 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:13,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:13,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:13,778 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:13,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 08:37:13,828 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-08 08:37:13,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-08 08:37:13,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:13,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:13,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:37:13,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:13,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:37:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:14,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:14,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807695079] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:14,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:14,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2025-02-08 08:37:14,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129272034] [2025-02-08 08:37:14,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:14,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:37:14,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:14,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:37:14,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:37:14,716 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 84 [2025-02-08 08:37:14,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 91 transitions, 412 flow. Second operand has 22 states, 22 states have (on average 28.40909090909091) internal successors, (625), 22 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:14,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:14,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 84 [2025-02-08 08:37:14,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:16,143 INFO L124 PetriNetUnfolderBase]: 10479/15699 cut-off events. [2025-02-08 08:37:16,143 INFO L125 PetriNetUnfolderBase]: For 16442/18027 co-relation queries the response was YES. [2025-02-08 08:37:16,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45641 conditions, 15699 events. 10479/15699 cut-off events. For 16442/18027 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 92224 event pairs, 3722 based on Foata normal form. 1151/16137 useless extension candidates. Maximal degree in co-relation 45623. Up to 4377 conditions per place. [2025-02-08 08:37:16,218 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 187 selfloop transitions, 14 changer transitions 0/213 dead transitions. [2025-02-08 08:37:16,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 213 transitions, 1295 flow [2025-02-08 08:37:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:37:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:37:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 419 transitions. [2025-02-08 08:37:16,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4988095238095238 [2025-02-08 08:37:16,220 INFO L175 Difference]: Start difference. First operand has 109 places, 91 transitions, 412 flow. Second operand 10 states and 419 transitions. [2025-02-08 08:37:16,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 213 transitions, 1295 flow [2025-02-08 08:37:16,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 213 transitions, 1271 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:37:16,267 INFO L231 Difference]: Finished difference. Result has 114 places, 94 transitions, 459 flow [2025-02-08 08:37:16,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=459, PETRI_PLACES=114, PETRI_TRANSITIONS=94} [2025-02-08 08:37:16,268 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2025-02-08 08:37:16,268 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 94 transitions, 459 flow [2025-02-08 08:37:16,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 28.40909090909091) internal successors, (625), 22 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:16,269 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:16,269 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:16,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-08 08:37:16,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:16,470 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:16,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1765061398, now seen corresponding path program 1 times [2025-02-08 08:37:16,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:16,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628289003] [2025-02-08 08:37:16,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:16,480 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-08 08:37:16,488 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-08 08:37:16,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:16,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:16,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:16,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628289003] [2025-02-08 08:37:16,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628289003] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:16,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275350248] [2025-02-08 08:37:16,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:16,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:16,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:16,623 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:16,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-08 08:37:16,676 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-08 08:37:16,698 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-08 08:37:16,698 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:16,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:16,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:37:16,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:16,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:16,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275350248] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:16,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:16,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-02-08 08:37:16,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165570478] [2025-02-08 08:37:16,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:16,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-08 08:37:16,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:16,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-08 08:37:16,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-02-08 08:37:17,075 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-02-08 08:37:17,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 94 transitions, 459 flow. Second operand has 19 states, 19 states have (on average 39.05263157894737) internal successors, (742), 19 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:17,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:17,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-02-08 08:37:17,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:18,553 INFO L124 PetriNetUnfolderBase]: 8768/14373 cut-off events. [2025-02-08 08:37:18,553 INFO L125 PetriNetUnfolderBase]: For 21141/22633 co-relation queries the response was YES. [2025-02-08 08:37:18,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43505 conditions, 14373 events. 8768/14373 cut-off events. For 21141/22633 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 101650 event pairs, 4313 based on Foata normal form. 706/14198 useless extension candidates. Maximal degree in co-relation 43485. Up to 5897 conditions per place. [2025-02-08 08:37:18,621 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 161 selfloop transitions, 20 changer transitions 0/205 dead transitions. [2025-02-08 08:37:18,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 205 transitions, 1371 flow [2025-02-08 08:37:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:37:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:37:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 493 transitions. [2025-02-08 08:37:18,622 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5869047619047619 [2025-02-08 08:37:18,623 INFO L175 Difference]: Start difference. First operand has 114 places, 94 transitions, 459 flow. Second operand 10 states and 493 transitions. [2025-02-08 08:37:18,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 205 transitions, 1371 flow [2025-02-08 08:37:18,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 205 transitions, 1274 flow, removed 27 selfloop flow, removed 6 redundant places. [2025-02-08 08:37:18,653 INFO L231 Difference]: Finished difference. Result has 123 places, 103 transitions, 577 flow [2025-02-08 08:37:18,653 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=577, PETRI_PLACES=123, PETRI_TRANSITIONS=103} [2025-02-08 08:37:18,653 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 39 predicate places. [2025-02-08 08:37:18,653 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 103 transitions, 577 flow [2025-02-08 08:37:18,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 39.05263157894737) internal successors, (742), 19 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:18,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:18,654 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:18,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-08 08:37:18,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-08 08:37:18,854 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:18,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash -303581806, now seen corresponding path program 2 times [2025-02-08 08:37:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:18,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482216807] [2025-02-08 08:37:18,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:37:18,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:18,860 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-08 08:37:18,869 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-08 08:37:18,869 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:37:18,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-08 08:37:19,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:19,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482216807] [2025-02-08 08:37:19,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482216807] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:19,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873610593] [2025-02-08 08:37:19,075 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:37:19,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:19,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:19,077 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:19,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 08:37:19,129 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-08 08:37:19,151 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-08 08:37:19,151 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:37:19,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:19,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:37:19,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:37:19,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:19,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-08 08:37:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:37:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873610593] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:19,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:19,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2025-02-08 08:37:19,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679861745] [2025-02-08 08:37:19,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:19,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-08 08:37:19,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:19,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-08 08:37:19,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2025-02-08 08:37:20,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 84 [2025-02-08 08:37:20,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 103 transitions, 577 flow. Second operand has 25 states, 25 states have (on average 30.56) internal successors, (764), 25 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:20,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:20,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 84 [2025-02-08 08:37:20,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:23,106 INFO L124 PetriNetUnfolderBase]: 14693/21506 cut-off events. [2025-02-08 08:37:23,106 INFO L125 PetriNetUnfolderBase]: For 26462/29238 co-relation queries the response was YES. [2025-02-08 08:37:23,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66242 conditions, 21506 events. 14693/21506 cut-off events. For 26462/29238 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 134033 event pairs, 2692 based on Foata normal form. 923/21048 useless extension candidates. Maximal degree in co-relation 66218. Up to 3133 conditions per place. [2025-02-08 08:37:23,207 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 312 selfloop transitions, 29 changer transitions 0/357 dead transitions. [2025-02-08 08:37:23,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 357 transitions, 2310 flow [2025-02-08 08:37:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-08 08:37:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-02-08 08:37:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 718 transitions. [2025-02-08 08:37:23,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5028011204481793 [2025-02-08 08:37:23,209 INFO L175 Difference]: Start difference. First operand has 123 places, 103 transitions, 577 flow. Second operand 17 states and 718 transitions. [2025-02-08 08:37:23,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 357 transitions, 2310 flow [2025-02-08 08:37:23,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 357 transitions, 2299 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-02-08 08:37:23,270 INFO L231 Difference]: Finished difference. Result has 139 places, 107 transitions, 673 flow [2025-02-08 08:37:23,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=673, PETRI_PLACES=139, PETRI_TRANSITIONS=107} [2025-02-08 08:37:23,271 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 55 predicate places. [2025-02-08 08:37:23,271 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 107 transitions, 673 flow [2025-02-08 08:37:23,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.56) internal successors, (764), 25 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:23,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:23,272 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:23,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-08 08:37:23,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-08 08:37:23,474 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:23,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1988347029, now seen corresponding path program 1 times [2025-02-08 08:37:23,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:23,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098676001] [2025-02-08 08:37:23,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:23,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:23,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-08 08:37:23,488 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-08 08:37:23,489 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:23,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:23,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:23,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098676001] [2025-02-08 08:37:23,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098676001] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:23,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641785922] [2025-02-08 08:37:23,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:23,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:23,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:23,604 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:23,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-08 08:37:23,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-08 08:37:23,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-08 08:37:23,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:23,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:23,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:37:23,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:23,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:37:23,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641785922] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:23,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:23,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-02-08 08:37:23,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279001752] [2025-02-08 08:37:23,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:23,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-08 08:37:23,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:23,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-08 08:37:23,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-02-08 08:37:23,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-02-08 08:37:23,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 107 transitions, 673 flow. Second operand has 19 states, 19 states have (on average 39.1578947368421) internal successors, (744), 19 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:23,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:23,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-02-08 08:37:23,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:25,751 INFO L124 PetriNetUnfolderBase]: 9275/15073 cut-off events. [2025-02-08 08:37:25,751 INFO L125 PetriNetUnfolderBase]: For 31971/32946 co-relation queries the response was YES. [2025-02-08 08:37:25,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49563 conditions, 15073 events. 9275/15073 cut-off events. For 31971/32946 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 104203 event pairs, 4966 based on Foata normal form. 456/14619 useless extension candidates. Maximal degree in co-relation 49535. Up to 7481 conditions per place. [2025-02-08 08:37:25,871 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 156 selfloop transitions, 20 changer transitions 0/203 dead transitions. [2025-02-08 08:37:25,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 203 transitions, 1562 flow [2025-02-08 08:37:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:37:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:37:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 490 transitions. [2025-02-08 08:37:25,873 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-02-08 08:37:25,873 INFO L175 Difference]: Start difference. First operand has 139 places, 107 transitions, 673 flow. Second operand 10 states and 490 transitions. [2025-02-08 08:37:25,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 203 transitions, 1562 flow [2025-02-08 08:37:25,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 203 transitions, 1383 flow, removed 16 selfloop flow, removed 13 redundant places. [2025-02-08 08:37:25,934 INFO L231 Difference]: Finished difference. Result has 139 places, 113 transitions, 694 flow [2025-02-08 08:37:25,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=694, PETRI_PLACES=139, PETRI_TRANSITIONS=113} [2025-02-08 08:37:25,935 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 55 predicate places. [2025-02-08 08:37:25,935 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 113 transitions, 694 flow [2025-02-08 08:37:25,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 39.1578947368421) internal successors, (744), 19 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:25,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:25,935 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:25,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-08 08:37:26,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-08 08:37:26,140 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:26,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:26,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2015929149, now seen corresponding path program 2 times [2025-02-08 08:37:26,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:26,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857329374] [2025-02-08 08:37:26,141 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:37:26,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:26,147 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-02-08 08:37:26,155 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-02-08 08:37:26,156 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:37:26,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-08 08:37:26,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:26,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857329374] [2025-02-08 08:37:26,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857329374] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:37:26,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91617181] [2025-02-08 08:37:26,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:37:26,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:37:26,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:26,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:37:26,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-08 08:37:26,388 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-02-08 08:37:26,415 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-02-08 08:37:26,416 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:37:26,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:26,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-08 08:37:26,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:37:26,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:37:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:37:26,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:37:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:37:26,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91617181] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:37:26,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:37:26,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2025-02-08 08:37:26,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022010622] [2025-02-08 08:37:26,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:37:26,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 08:37:26,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:26,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 08:37:26,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2025-02-08 08:37:27,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2025-02-08 08:37:27,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 113 transitions, 694 flow. Second operand has 24 states, 24 states have (on average 29.958333333333332) internal successors, (719), 24 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:27,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:27,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2025-02-08 08:37:27,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:30,424 INFO L124 PetriNetUnfolderBase]: 15925/23033 cut-off events. [2025-02-08 08:37:30,424 INFO L125 PetriNetUnfolderBase]: For 37706/39490 co-relation queries the response was YES. [2025-02-08 08:37:30,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72684 conditions, 23033 events. 15925/23033 cut-off events. For 37706/39490 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 140048 event pairs, 3348 based on Foata normal form. 698/22287 useless extension candidates. Maximal degree in co-relation 72658. Up to 3742 conditions per place. [2025-02-08 08:37:30,574 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 291 selfloop transitions, 26 changer transitions 0/336 dead transitions. [2025-02-08 08:37:30,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 336 transitions, 2347 flow [2025-02-08 08:37:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-08 08:37:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-08 08:37:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 652 transitions. [2025-02-08 08:37:30,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2025-02-08 08:37:30,576 INFO L175 Difference]: Start difference. First operand has 139 places, 113 transitions, 694 flow. Second operand 16 states and 652 transitions. [2025-02-08 08:37:30,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 336 transitions, 2347 flow [2025-02-08 08:37:30,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 336 transitions, 2325 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-08 08:37:30,651 INFO L231 Difference]: Finished difference. Result has 151 places, 117 transitions, 777 flow [2025-02-08 08:37:30,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=777, PETRI_PLACES=151, PETRI_TRANSITIONS=117} [2025-02-08 08:37:30,652 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 67 predicate places. [2025-02-08 08:37:30,652 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 117 transitions, 777 flow [2025-02-08 08:37:30,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 29.958333333333332) internal successors, (719), 24 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:30,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:30,652 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:30,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-08 08:37:30,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 08:37:30,853 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:30,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:30,853 INFO L85 PathProgramCache]: Analyzing trace with hash -427420659, now seen corresponding path program 1 times [2025-02-08 08:37:30,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:30,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551448316] [2025-02-08 08:37:30,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:30,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:30,859 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-02-08 08:37:30,863 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-02-08 08:37:30,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:30,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:37:30,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:30,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551448316] [2025-02-08 08:37:30,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551448316] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:30,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:37:30,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:37:30,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204029783] [2025-02-08 08:37:30,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:30,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:37:30,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:30,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:37:30,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:37:30,917 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-02-08 08:37:30,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 117 transitions, 777 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:30,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:30,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-02-08 08:37:30,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:32,244 INFO L124 PetriNetUnfolderBase]: 8744/14842 cut-off events. [2025-02-08 08:37:32,244 INFO L125 PetriNetUnfolderBase]: For 36499/37577 co-relation queries the response was YES. [2025-02-08 08:37:32,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49549 conditions, 14842 events. 8744/14842 cut-off events. For 36499/37577 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 107050 event pairs, 5012 based on Foata normal form. 506/14279 useless extension candidates. Maximal degree in co-relation 49520. Up to 9568 conditions per place. [2025-02-08 08:37:32,352 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 107 selfloop transitions, 7 changer transitions 0/144 dead transitions. [2025-02-08 08:37:32,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 144 transitions, 1208 flow [2025-02-08 08:37:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:37:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:37:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2025-02-08 08:37:32,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2025-02-08 08:37:32,353 INFO L175 Difference]: Start difference. First operand has 151 places, 117 transitions, 777 flow. Second operand 4 states and 211 transitions. [2025-02-08 08:37:32,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 144 transitions, 1208 flow [2025-02-08 08:37:32,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 144 transitions, 1086 flow, removed 23 selfloop flow, removed 11 redundant places. [2025-02-08 08:37:32,423 INFO L231 Difference]: Finished difference. Result has 143 places, 114 transitions, 687 flow [2025-02-08 08:37:32,423 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=687, PETRI_PLACES=143, PETRI_TRANSITIONS=114} [2025-02-08 08:37:32,423 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 59 predicate places. [2025-02-08 08:37:32,423 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 114 transitions, 687 flow [2025-02-08 08:37:32,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:32,424 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:32,424 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:32,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-08 08:37:32,424 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:32,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:32,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1446504794, now seen corresponding path program 1 times [2025-02-08 08:37:32,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:32,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736963386] [2025-02-08 08:37:32,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:32,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:32,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-08 08:37:32,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-08 08:37:32,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:32,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:37:32,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:32,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736963386] [2025-02-08 08:37:32,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736963386] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:32,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:37:32,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:37:32,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054256898] [2025-02-08 08:37:32,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:32,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:37:32,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:32,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:37:32,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:37:32,503 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-02-08 08:37:32,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 114 transitions, 687 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:32,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:32,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-02-08 08:37:32,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:33,920 INFO L124 PetriNetUnfolderBase]: 8464/14463 cut-off events. [2025-02-08 08:37:33,920 INFO L125 PetriNetUnfolderBase]: For 27907/29051 co-relation queries the response was YES. [2025-02-08 08:37:33,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45464 conditions, 14463 events. 8464/14463 cut-off events. For 27907/29051 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 105030 event pairs, 4994 based on Foata normal form. 539/13939 useless extension candidates. Maximal degree in co-relation 45440. Up to 9327 conditions per place. [2025-02-08 08:37:33,980 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 100 selfloop transitions, 7 changer transitions 0/137 dead transitions. [2025-02-08 08:37:33,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 137 transitions, 1029 flow [2025-02-08 08:37:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:37:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:37:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 210 transitions. [2025-02-08 08:37:33,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-02-08 08:37:33,981 INFO L175 Difference]: Start difference. First operand has 143 places, 114 transitions, 687 flow. Second operand 4 states and 210 transitions. [2025-02-08 08:37:33,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 137 transitions, 1029 flow [2025-02-08 08:37:34,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 137 transitions, 1003 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:37:34,011 INFO L231 Difference]: Finished difference. Result has 141 places, 111 transitions, 655 flow [2025-02-08 08:37:34,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=655, PETRI_PLACES=141, PETRI_TRANSITIONS=111} [2025-02-08 08:37:34,011 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 57 predicate places. [2025-02-08 08:37:34,011 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 111 transitions, 655 flow [2025-02-08 08:37:34,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:34,011 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:34,012 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:34,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-08 08:37:34,012 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:34,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:34,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1817812039, now seen corresponding path program 1 times [2025-02-08 08:37:34,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:34,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817042213] [2025-02-08 08:37:34,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:37:34,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:34,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-08 08:37:34,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-08 08:37:34,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:37:34,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:37:34,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:34,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817042213] [2025-02-08 08:37:34,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817042213] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:34,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:37:34,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-02-08 08:37:34,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507446696] [2025-02-08 08:37:34,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:34,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:37:34,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:34,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:37:34,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:37:34,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 84 [2025-02-08 08:37:34,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 111 transitions, 655 flow. Second operand has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:34,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:34,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 84 [2025-02-08 08:37:34,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:39,917 INFO L124 PetriNetUnfolderBase]: 32196/50075 cut-off events. [2025-02-08 08:37:39,917 INFO L125 PetriNetUnfolderBase]: For 80204/83616 co-relation queries the response was YES. [2025-02-08 08:37:40,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151982 conditions, 50075 events. 32196/50075 cut-off events. For 80204/83616 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 363628 event pairs, 4494 based on Foata normal form. 919/47942 useless extension candidates. Maximal degree in co-relation 151958. Up to 9263 conditions per place. [2025-02-08 08:37:40,136 INFO L140 encePairwiseOnDemand]: 67/84 looper letters, 508 selfloop transitions, 92 changer transitions 349/970 dead transitions. [2025-02-08 08:37:40,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 970 transitions, 7131 flow [2025-02-08 08:37:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-02-08 08:37:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2025-02-08 08:37:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 2501 transitions. [2025-02-08 08:37:40,140 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2025-02-08 08:37:40,140 INFO L175 Difference]: Start difference. First operand has 141 places, 111 transitions, 655 flow. Second operand 61 states and 2501 transitions. [2025-02-08 08:37:40,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 970 transitions, 7131 flow [2025-02-08 08:37:40,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 970 transitions, 7015 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:37:40,308 INFO L231 Difference]: Finished difference. Result has 240 places, 189 transitions, 1435 flow [2025-02-08 08:37:40,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=1435, PETRI_PLACES=240, PETRI_TRANSITIONS=189} [2025-02-08 08:37:40,309 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 156 predicate places. [2025-02-08 08:37:40,309 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 189 transitions, 1435 flow [2025-02-08 08:37:40,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:40,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:40,309 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:40,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-08 08:37:40,310 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:40,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:40,310 INFO L85 PathProgramCache]: Analyzing trace with hash -118580347, now seen corresponding path program 2 times [2025-02-08 08:37:40,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:40,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666733713] [2025-02-08 08:37:40,311 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:37:40,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:40,316 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 59 statements into 2 equivalence classes. [2025-02-08 08:37:40,319 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 38 of 59 statements. [2025-02-08 08:37:40,319 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:37:40,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:37:40,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:40,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666733713] [2025-02-08 08:37:40,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666733713] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:40,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:37:40,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:37:40,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705596206] [2025-02-08 08:37:40,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:40,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:37:40,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:40,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:37:40,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:37:40,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-02-08 08:37:40,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 189 transitions, 1435 flow. Second operand has 5 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:40,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:40,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-02-08 08:37:40,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:37:45,710 INFO L124 PetriNetUnfolderBase]: 24575/42961 cut-off events. [2025-02-08 08:37:45,710 INFO L125 PetriNetUnfolderBase]: For 407890/412052 co-relation queries the response was YES. [2025-02-08 08:37:46,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180518 conditions, 42961 events. 24575/42961 cut-off events. For 407890/412052 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 362930 event pairs, 9696 based on Foata normal form. 1101/40631 useless extension candidates. Maximal degree in co-relation 180452. Up to 23326 conditions per place. [2025-02-08 08:37:46,159 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 136 selfloop transitions, 10 changer transitions 60/281 dead transitions. [2025-02-08 08:37:46,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 281 transitions, 2586 flow [2025-02-08 08:37:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:37:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:37:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 293 transitions. [2025-02-08 08:37:46,160 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5813492063492064 [2025-02-08 08:37:46,160 INFO L175 Difference]: Start difference. First operand has 240 places, 189 transitions, 1435 flow. Second operand 6 states and 293 transitions. [2025-02-08 08:37:46,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 281 transitions, 2586 flow [2025-02-08 08:37:46,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 281 transitions, 2447 flow, removed 36 selfloop flow, removed 23 redundant places. [2025-02-08 08:37:46,705 INFO L231 Difference]: Finished difference. Result has 200 places, 193 transitions, 1451 flow [2025-02-08 08:37:46,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1451, PETRI_PLACES=200, PETRI_TRANSITIONS=193} [2025-02-08 08:37:46,705 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 116 predicate places. [2025-02-08 08:37:46,705 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 193 transitions, 1451 flow [2025-02-08 08:37:46,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:46,706 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:37:46,706 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:37:46,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-08 08:37:46,706 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-02-08 08:37:46,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:37:46,707 INFO L85 PathProgramCache]: Analyzing trace with hash 379233677, now seen corresponding path program 3 times [2025-02-08 08:37:46,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:37:46,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416299293] [2025-02-08 08:37:46,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:37:46,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:37:46,716 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 3 equivalence classes. [2025-02-08 08:37:46,721 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 44 of 59 statements. [2025-02-08 08:37:46,721 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-08 08:37:46,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:37:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:37:46,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:37:46,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416299293] [2025-02-08 08:37:46,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416299293] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:37:46,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:37:46,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-02-08 08:37:46,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005689740] [2025-02-08 08:37:46,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:37:46,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:37:46,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:37:46,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:37:46,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:37:47,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2025-02-08 08:37:47,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 193 transitions, 1451 flow. Second operand has 14 states, 14 states have (on average 31.714285714285715) internal successors, (444), 14 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:37:47,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:37:47,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2025-02-08 08:37:47,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand