./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-name-comparator-subst.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 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:02:03,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:02:03,646 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:02:03,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:02:03,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:02:03,666 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:02:03,667 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:02:03,667 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:02:03,667 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:02:03,667 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:02:03,668 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:02:03,668 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:02:03,668 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:02:03,668 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:02:03,668 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:02:03,668 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:02:03,668 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:02:03,668 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:02:03,668 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:02:03,668 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:02:03,669 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:02:03,669 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:02:03,669 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:02:03,669 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:02:03,669 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:02:03,669 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:02:03,669 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:02:03,669 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:02:03,669 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:02:03,669 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:02:03,669 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:02:03,670 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:02:03,670 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:02:03,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:03,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:02:03,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:02:03,670 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:02:03,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:02:03,670 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:02:03,670 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:02:03,670 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:02:03,670 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:02:03,670 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 -> 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d [2025-02-06 13:02:03,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:02:03,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:02:03,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:02:03,940 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:02:03,941 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:02:03,941 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2025-02-06 13:02:05,107 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c532a5f87/cbd2cd533b1e4d259d3c401fdd8f3d61/FLAGbb8b8f40b [2025-02-06 13:02:05,369 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:02:05,370 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2025-02-06 13:02:05,377 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c532a5f87/cbd2cd533b1e4d259d3c401fdd8f3d61/FLAGbb8b8f40b [2025-02-06 13:02:05,688 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c532a5f87/cbd2cd533b1e4d259d3c401fdd8f3d61 [2025-02-06 13:02:05,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:02:05,693 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:02:05,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:05,697 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:02:05,700 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:02:05,701 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581d1428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05, skipping insertion in model container [2025-02-06 13:02:05,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,720 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:02:05,864 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:02:05,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:05,878 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:02:05,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:05,925 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:02:05,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05 WrapperNode [2025-02-06 13:02:05,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:05,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:05,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:02:05,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:02:05,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,939 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,957 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 300 [2025-02-06 13:02:05,957 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:05,958 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:02:05,958 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:02:05,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:02:05,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,966 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,975 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 13:02:05,976 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,976 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,981 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,982 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,983 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,985 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:02:05,985 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:02:05,986 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:02:05,986 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:02:05,986 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (1/1) ... [2025-02-06 13:02:05,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:06,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:06,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:02:06,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:02:06,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:02:06,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:02:06,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:02:06,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:02:06,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:02:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:02:06,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:02:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:02:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:02:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:02:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:02:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:02:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:02:06,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:02:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:02:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:02:06,034 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:02:06,110 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:02:06,111 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:02:06,580 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:02:06,580 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:02:06,840 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:02:06,840 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:02:06,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:06 BoogieIcfgContainer [2025-02-06 13:02:06,841 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:02:06,842 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:02:06,842 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:02:06,845 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:02:06,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:02:05" (1/3) ... [2025-02-06 13:02:06,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322991e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:06, skipping insertion in model container [2025-02-06 13:02:06,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:05" (2/3) ... [2025-02-06 13:02:06,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322991e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:06, skipping insertion in model container [2025-02-06 13:02:06,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:06" (3/3) ... [2025-02-06 13:02:06,847 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2025-02-06 13:02:06,857 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:02:06,858 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-subst.wvr.c that has 4 procedures, 44 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2025-02-06 13:02:06,858 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:02:06,902 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 13:02:06,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 50 transitions, 121 flow [2025-02-06 13:02:06,944 INFO L124 PetriNetUnfolderBase]: 7/47 cut-off events. [2025-02-06 13:02:06,946 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:02:06,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 7/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2025-02-06 13:02:06,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 50 transitions, 121 flow [2025-02-06 13:02:06,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 46 transitions, 110 flow [2025-02-06 13:02:06,955 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:02:06,965 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;@6951d4a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:02:06,966 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2025-02-06 13:02:06,968 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:02:06,968 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:02:06,968 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:02:06,968 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:06,972 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:06,972 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:06,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash 799859, now seen corresponding path program 1 times [2025-02-06 13:02:06,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:06,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158225893] [2025-02-06 13:02:06,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:06,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:07,031 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:07,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:07,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:07,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:07,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:07,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158225893] [2025-02-06 13:02:07,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158225893] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:07,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:07,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:02:07,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653693940] [2025-02-06 13:02:07,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:07,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:07,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:07,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:07,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:07,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:07,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:07,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:07,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:07,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:07,505 INFO L124 PetriNetUnfolderBase]: 1316/2103 cut-off events. [2025-02-06 13:02:07,505 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2025-02-06 13:02:07,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4116 conditions, 2103 events. 1316/2103 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10097 event pairs, 1060 based on Foata normal form. 1/1737 useless extension candidates. Maximal degree in co-relation 3810. Up to 1877 conditions per place. [2025-02-06 13:02:07,518 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2025-02-06 13:02:07,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 162 flow [2025-02-06 13:02:07,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2025-02-06 13:02:07,527 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2025-02-06 13:02:07,527 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 110 flow. Second operand 3 states and 73 transitions. [2025-02-06 13:02:07,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 162 flow [2025-02-06 13:02:07,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 150 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:02:07,532 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 90 flow [2025-02-06 13:02:07,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2025-02-06 13:02:07,536 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2025-02-06 13:02:07,536 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 90 flow [2025-02-06 13:02:07,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:07,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:07,536 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:07,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:02:07,537 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:07,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:07,537 INFO L85 PathProgramCache]: Analyzing trace with hash 799860, now seen corresponding path program 1 times [2025-02-06 13:02:07,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:07,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161635353] [2025-02-06 13:02:07,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:07,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:07,544 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:07,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:07,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:07,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:07,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:07,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161635353] [2025-02-06 13:02:07,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161635353] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:07,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:07,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:02:07,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130672139] [2025-02-06 13:02:07,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:07,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:07,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:07,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:07,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:07,809 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:07,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:07,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:07,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:07,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:08,047 INFO L124 PetriNetUnfolderBase]: 1316/2105 cut-off events. [2025-02-06 13:02:08,047 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-02-06 13:02:08,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4035 conditions, 2105 events. 1316/2105 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10101 event pairs, 1060 based on Foata normal form. 1/1739 useless extension candidates. Maximal degree in co-relation 4016. Up to 1881 conditions per place. [2025-02-06 13:02:08,058 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 33 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2025-02-06 13:02:08,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 164 flow [2025-02-06 13:02:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2025-02-06 13:02:08,059 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2025-02-06 13:02:08,059 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 90 flow. Second operand 3 states and 73 transitions. [2025-02-06 13:02:08,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 164 flow [2025-02-06 13:02:08,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:08,061 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 100 flow [2025-02-06 13:02:08,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2025-02-06 13:02:08,061 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2025-02-06 13:02:08,061 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 100 flow [2025-02-06 13:02:08,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:08,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:08,062 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:02:08,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:02:08,062 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:08,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash 768691715, now seen corresponding path program 1 times [2025-02-06 13:02:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:08,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236318939] [2025-02-06 13:02:08,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:08,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:08,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:08,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:08,096 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:08,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:08,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:08,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236318939] [2025-02-06 13:02:08,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236318939] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:08,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036252269] [2025-02-06 13:02:08,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:08,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:08,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:08,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:08,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:02:08,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:08,352 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:08,352 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:08,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:08,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:02:08,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:08,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:02:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:08,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:08,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036252269] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:08,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:08,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-02-06 13:02:08,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081219442] [2025-02-06 13:02:08,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:08,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:02:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:08,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:02:08,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:02:08,527 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:08,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 100 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:08,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:08,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:08,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:08,870 INFO L124 PetriNetUnfolderBase]: 1317/2110 cut-off events. [2025-02-06 13:02:08,870 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-02-06 13:02:08,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4053 conditions, 2110 events. 1317/2110 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10120 event pairs, 1060 based on Foata normal form. 1/1744 useless extension candidates. Maximal degree in co-relation 4040. Up to 1882 conditions per place. [2025-02-06 13:02:08,880 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 35 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2025-02-06 13:02:08,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 198 flow [2025-02-06 13:02:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2025-02-06 13:02:08,882 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.412 [2025-02-06 13:02:08,882 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 100 flow. Second operand 5 states and 103 transitions. [2025-02-06 13:02:08,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 198 flow [2025-02-06 13:02:08,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:08,883 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 135 flow [2025-02-06 13:02:08,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2025-02-06 13:02:08,884 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2025-02-06 13:02:08,884 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 135 flow [2025-02-06 13:02:08,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:08,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:08,884 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2025-02-06 13:02:08,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:02:09,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:09,086 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:09,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:09,086 INFO L85 PathProgramCache]: Analyzing trace with hash 707131873, now seen corresponding path program 2 times [2025-02-06 13:02:09,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:09,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146869889] [2025-02-06 13:02:09,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:09,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:09,094 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-02-06 13:02:09,103 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:09,103 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:09,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:09,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:09,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146869889] [2025-02-06 13:02:09,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146869889] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:09,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878772143] [2025-02-06 13:02:09,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:09,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:09,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:09,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:09,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:02:09,236 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-02-06 13:02:09,253 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:09,253 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:09,253 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:09,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 13:02:09,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:09,319 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:09,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878772143] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:09,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:09,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-06 13:02:09,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075507146] [2025-02-06 13:02:09,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:09,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:09,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:09,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:09,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:02:09,343 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-02-06 13:02:09,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 135 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:09,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:09,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-02-06 13:02:09,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:09,513 INFO L124 PetriNetUnfolderBase]: 1316/2107 cut-off events. [2025-02-06 13:02:09,513 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2025-02-06 13:02:09,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 2107 events. 1316/2107 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10088 event pairs, 1060 based on Foata normal form. 1/1742 useless extension candidates. Maximal degree in co-relation 4028. Up to 1878 conditions per place. [2025-02-06 13:02:09,521 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 31 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2025-02-06 13:02:09,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 199 flow [2025-02-06 13:02:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:02:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:02:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2025-02-06 13:02:09,523 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2025-02-06 13:02:09,523 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 135 flow. Second operand 6 states and 116 transitions. [2025-02-06 13:02:09,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 199 flow [2025-02-06 13:02:09,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 188 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:09,524 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 126 flow [2025-02-06 13:02:09,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2025-02-06 13:02:09,525 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2025-02-06 13:02:09,525 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 126 flow [2025-02-06 13:02:09,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:09,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:09,526 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:09,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:09,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:09,726 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:09,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:09,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1026702347, now seen corresponding path program 1 times [2025-02-06 13:02:09,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:09,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334988960] [2025-02-06 13:02:09,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:09,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:09,738 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:02:09,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:02:09,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:09,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:09,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334988960] [2025-02-06 13:02:09,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334988960] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158211283] [2025-02-06 13:02:09,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:09,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:09,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:09,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:09,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:02:09,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:02:09,902 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:02:09,902 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:09,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:09,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:02:09,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:09,939 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:09,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158211283] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:09,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:09,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-02-06 13:02:09,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918739345] [2025-02-06 13:02:09,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:09,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:02:09,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:09,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:02:09,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:02:09,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-02-06 13:02:09,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 126 flow. Second operand has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:09,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:09,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-02-06 13:02:09,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:10,195 INFO L124 PetriNetUnfolderBase]: 1315/2106 cut-off events. [2025-02-06 13:02:10,196 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2025-02-06 13:02:10,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 2106 events. 1315/2106 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10075 event pairs, 1060 based on Foata normal form. 1/1741 useless extension candidates. Maximal degree in co-relation 4016. Up to 1878 conditions per place. [2025-02-06 13:02:10,204 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2025-02-06 13:02:10,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 43 transitions, 200 flow [2025-02-06 13:02:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2025-02-06 13:02:10,205 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.408 [2025-02-06 13:02:10,205 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 126 flow. Second operand 5 states and 102 transitions. [2025-02-06 13:02:10,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 43 transitions, 200 flow [2025-02-06 13:02:10,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 180 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-06 13:02:10,206 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 108 flow [2025-02-06 13:02:10,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2025-02-06 13:02:10,207 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2025-02-06 13:02:10,207 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 108 flow [2025-02-06 13:02:10,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:10,207 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:10,207 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:10,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:10,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:10,408 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:10,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:10,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1460164250, now seen corresponding path program 2 times [2025-02-06 13:02:10,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:10,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612698419] [2025-02-06 13:02:10,409 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:10,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:10,415 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-06 13:02:10,420 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 13 statements. [2025-02-06 13:02:10,421 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:02:10,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:10,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:10,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612698419] [2025-02-06 13:02:10,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612698419] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:10,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:10,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:10,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703156888] [2025-02-06 13:02:10,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:10,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:10,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:10,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:10,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:10,593 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:10,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:10,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:10,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:10,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:10,898 INFO L124 PetriNetUnfolderBase]: 2629/4081 cut-off events. [2025-02-06 13:02:10,898 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2025-02-06 13:02:10,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7939 conditions, 4081 events. 2629/4081 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 21542 event pairs, 1240 based on Foata normal form. 0/3383 useless extension candidates. Maximal degree in co-relation 7910. Up to 2168 conditions per place. [2025-02-06 13:02:10,911 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 57 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2025-02-06 13:02:10,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 287 flow [2025-02-06 13:02:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2025-02-06 13:02:10,912 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2025-02-06 13:02:10,912 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 108 flow. Second operand 5 states and 120 transitions. [2025-02-06 13:02:10,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 287 flow [2025-02-06 13:02:10,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:10,913 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 116 flow [2025-02-06 13:02:10,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2025-02-06 13:02:10,914 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2025-02-06 13:02:10,914 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 116 flow [2025-02-06 13:02:10,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:10,914 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:10,914 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:10,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:02:10,914 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:10,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1460164249, now seen corresponding path program 1 times [2025-02-06 13:02:10,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:10,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811993055] [2025-02-06 13:02:10,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:10,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:10,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:02:10,926 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:02:10,926 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:10,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:02:10,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:10,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811993055] [2025-02-06 13:02:10,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811993055] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:10,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:10,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:10,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500272875] [2025-02-06 13:02:10,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:10,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:10,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:10,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:10,995 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-06 13:02:10,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:10,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:10,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-06 13:02:10,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:11,279 INFO L124 PetriNetUnfolderBase]: 2423/3671 cut-off events. [2025-02-06 13:02:11,280 INFO L125 PetriNetUnfolderBase]: For 485/561 co-relation queries the response was YES. [2025-02-06 13:02:11,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7579 conditions, 3671 events. 2423/3671 cut-off events. For 485/561 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17419 event pairs, 2025 based on Foata normal form. 172/3359 useless extension candidates. Maximal degree in co-relation 7548. Up to 3458 conditions per place. [2025-02-06 13:02:11,291 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 33 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2025-02-06 13:02:11,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 180 flow [2025-02-06 13:02:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2025-02-06 13:02:11,293 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.355 [2025-02-06 13:02:11,293 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 116 flow. Second operand 4 states and 71 transitions. [2025-02-06 13:02:11,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 180 flow [2025-02-06 13:02:11,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:11,294 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 108 flow [2025-02-06 13:02:11,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2025-02-06 13:02:11,295 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2025-02-06 13:02:11,295 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 108 flow [2025-02-06 13:02:11,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:11,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:11,295 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:11,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:02:11,295 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:11,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2013917262, now seen corresponding path program 1 times [2025-02-06 13:02:11,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:11,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673375278] [2025-02-06 13:02:11,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:11,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:11,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:02:11,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:02:11,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:11,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:02:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673375278] [2025-02-06 13:02:11,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673375278] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344162017] [2025-02-06 13:02:11,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:11,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:11,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:11,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:02:11,497 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:02:11,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:02:11,512 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:11,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:11,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:02:11,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:11,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:11,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-06 13:02:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:11,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344162017] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:11,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:11,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2025-02-06 13:02:11,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539703361] [2025-02-06 13:02:11,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:11,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:02:11,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:11,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:02:11,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:02:11,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:11,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 108 flow. Second operand has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:11,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:11,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:11,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:12,817 INFO L124 PetriNetUnfolderBase]: 6825/9783 cut-off events. [2025-02-06 13:02:12,817 INFO L125 PetriNetUnfolderBase]: For 905/1130 co-relation queries the response was YES. [2025-02-06 13:02:12,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20450 conditions, 9783 events. 6825/9783 cut-off events. For 905/1130 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 49387 event pairs, 2385 based on Foata normal form. 0/8225 useless extension candidates. Maximal degree in co-relation 20419. Up to 4022 conditions per place. [2025-02-06 13:02:12,845 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 81 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2025-02-06 13:02:12,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 91 transitions, 412 flow [2025-02-06 13:02:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:02:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:02:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2025-02-06 13:02:12,846 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4575 [2025-02-06 13:02:12,846 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 108 flow. Second operand 8 states and 183 transitions. [2025-02-06 13:02:12,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 91 transitions, 412 flow [2025-02-06 13:02:12,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 409 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:12,848 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 133 flow [2025-02-06 13:02:12,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=133, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2025-02-06 13:02:12,849 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2025-02-06 13:02:12,849 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 133 flow [2025-02-06 13:02:12,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:12,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:12,849 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:12,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 13:02:13,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-06 13:02:13,050 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:13,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash 325221158, now seen corresponding path program 1 times [2025-02-06 13:02:13,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:13,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070451869] [2025-02-06 13:02:13,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:13,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:13,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:02:13,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:13,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:13,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:13,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:13,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070451869] [2025-02-06 13:02:13,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070451869] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:13,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588263039] [2025-02-06 13:02:13,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:13,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:13,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:13,233 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:13,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 13:02:13,279 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:02:13,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:13,294 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:13,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:13,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 13:02:13,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:13,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:02:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:13,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:13,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588263039] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:13,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:13,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2025-02-06 13:02:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389883244] [2025-02-06 13:02:13,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:13,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 13:02:13,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:13,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 13:02:13,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2025-02-06 13:02:14,002 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2025-02-06 13:02:14,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 133 flow. Second operand has 21 states, 21 states have (on average 13.142857142857142) internal successors, (276), 21 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:14,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:14,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2025-02-06 13:02:14,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:15,613 INFO L124 PetriNetUnfolderBase]: 12853/18397 cut-off events. [2025-02-06 13:02:15,613 INFO L125 PetriNetUnfolderBase]: For 2855/2855 co-relation queries the response was YES. [2025-02-06 13:02:15,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40509 conditions, 18397 events. 12853/18397 cut-off events. For 2855/2855 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 101227 event pairs, 3460 based on Foata normal form. 0/15491 useless extension candidates. Maximal degree in co-relation 40473. Up to 5736 conditions per place. [2025-02-06 13:02:15,703 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 115 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2025-02-06 13:02:15,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 126 transitions, 608 flow [2025-02-06 13:02:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2025-02-06 13:02:15,709 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2025-02-06 13:02:15,709 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 133 flow. Second operand 9 states and 216 transitions. [2025-02-06 13:02:15,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 126 transitions, 608 flow [2025-02-06 13:02:15,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 126 transitions, 601 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:15,713 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 160 flow [2025-02-06 13:02:15,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2025-02-06 13:02:15,714 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2025-02-06 13:02:15,714 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 160 flow [2025-02-06 13:02:15,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.142857142857142) internal successors, (276), 21 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:15,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:15,714 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:15,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:15,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:15,915 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:15,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:15,915 INFO L85 PathProgramCache]: Analyzing trace with hash 558768016, now seen corresponding path program 1 times [2025-02-06 13:02:15,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:15,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022256403] [2025-02-06 13:02:15,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:15,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:15,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:02:15,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:02:15,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:15,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:16,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:16,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022256403] [2025-02-06 13:02:16,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022256403] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:16,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705509055] [2025-02-06 13:02:16,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:16,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:16,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:16,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:16,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:02:16,208 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:02:16,224 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:02:16,224 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:16,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:16,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:02:16,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:16,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:16,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-06 13:02:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:16,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705509055] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:16,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:16,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2025-02-06 13:02:16,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623791492] [2025-02-06 13:02:16,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:16,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 13:02:16,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:16,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 13:02:16,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:02:16,650 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:16,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 160 flow. Second operand has 17 states, 17 states have (on average 14.764705882352942) internal successors, (251), 17 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:16,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:16,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:16,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:20,253 INFO L124 PetriNetUnfolderBase]: 32327/46067 cut-off events. [2025-02-06 13:02:20,253 INFO L125 PetriNetUnfolderBase]: For 19731/20147 co-relation queries the response was YES. [2025-02-06 13:02:20,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104651 conditions, 46067 events. 32327/46067 cut-off events. For 19731/20147 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 276522 event pairs, 12757 based on Foata normal form. 0/38291 useless extension candidates. Maximal degree in co-relation 104612. Up to 20102 conditions per place. [2025-02-06 13:02:20,452 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 89 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2025-02-06 13:02:20,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 99 transitions, 546 flow [2025-02-06 13:02:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:02:20,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:02:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2025-02-06 13:02:20,453 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4475 [2025-02-06 13:02:20,453 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 160 flow. Second operand 8 states and 179 transitions. [2025-02-06 13:02:20,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 99 transitions, 546 flow [2025-02-06 13:02:20,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 521 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:20,462 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 175 flow [2025-02-06 13:02:20,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2025-02-06 13:02:20,463 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 14 predicate places. [2025-02-06 13:02:20,463 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 175 flow [2025-02-06 13:02:20,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.764705882352942) internal successors, (251), 17 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:20,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:20,463 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:20,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:20,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 13:02:20,668 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:20,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:20,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1121496466, now seen corresponding path program 1 times [2025-02-06 13:02:20,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:20,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133971410] [2025-02-06 13:02:20,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:20,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:20,675 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:02:20,685 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:02:20,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:20,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133971410] [2025-02-06 13:02:20,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133971410] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652771146] [2025-02-06 13:02:20,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:20,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:20,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:02:20,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:02:20,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:02:20,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:20,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:20,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:02:20,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:21,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:21,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-06 13:02:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:21,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652771146] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:21,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:21,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2025-02-06 13:02:21,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259893848] [2025-02-06 13:02:21,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:21,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:02:21,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:21,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:02:21,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:02:21,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:21,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 175 flow. Second operand has 24 states, 24 states have (on average 14.5) internal successors, (348), 24 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:21,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:21,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:21,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:26,450 INFO L124 PetriNetUnfolderBase]: 41923/59631 cut-off events. [2025-02-06 13:02:26,451 INFO L125 PetriNetUnfolderBase]: For 23790/24462 co-relation queries the response was YES. [2025-02-06 13:02:26,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139836 conditions, 59631 events. 41923/59631 cut-off events. For 23790/24462 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 371863 event pairs, 12007 based on Foata normal form. 778/51213 useless extension candidates. Maximal degree in co-relation 139794. Up to 18928 conditions per place. [2025-02-06 13:02:26,942 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 121 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2025-02-06 13:02:26,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 132 transitions, 715 flow [2025-02-06 13:02:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2025-02-06 13:02:26,944 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2025-02-06 13:02:26,944 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 175 flow. Second operand 9 states and 218 transitions. [2025-02-06 13:02:26,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 132 transitions, 715 flow [2025-02-06 13:02:27,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 132 transitions, 708 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:27,048 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 194 flow [2025-02-06 13:02:27,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=194, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2025-02-06 13:02:27,050 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2025-02-06 13:02:27,050 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 194 flow [2025-02-06 13:02:27,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.5) internal successors, (348), 24 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:27,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:27,051 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2025-02-06 13:02:27,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:27,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:27,252 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:27,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1333983578, now seen corresponding path program 2 times [2025-02-06 13:02:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:27,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301520176] [2025-02-06 13:02:27,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:27,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:27,261 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:02:27,276 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:02:27,276 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:27,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:27,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:27,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301520176] [2025-02-06 13:02:27,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301520176] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:27,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108714767] [2025-02-06 13:02:27,512 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:27,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:27,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:27,516 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:27,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 13:02:27,574 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:02:27,594 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:02:27,594 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:27,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:27,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 13:02:27,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:27,629 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:27,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108714767] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:27,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:27,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2025-02-06 13:02:27,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908264823] [2025-02-06 13:02:27,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:27,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:27,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:27,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:27,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:02:27,635 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-02-06 13:02:27,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 194 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:27,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:27,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-02-06 13:02:27,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:31,721 INFO L124 PetriNetUnfolderBase]: 37549/53687 cut-off events. [2025-02-06 13:02:31,722 INFO L125 PetriNetUnfolderBase]: For 29516/30192 co-relation queries the response was YES. [2025-02-06 13:02:31,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128219 conditions, 53687 events. 37549/53687 cut-off events. For 29516/30192 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 341322 event pairs, 975 based on Foata normal form. 0/45743 useless extension candidates. Maximal degree in co-relation 128175. Up to 13570 conditions per place. [2025-02-06 13:02:31,997 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 148 selfloop transitions, 4 changer transitions 0/155 dead transitions. [2025-02-06 13:02:31,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 155 transitions, 875 flow [2025-02-06 13:02:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:02:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:02:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2025-02-06 13:02:31,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.68 [2025-02-06 13:02:31,998 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 194 flow. Second operand 6 states and 204 transitions. [2025-02-06 13:02:31,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 155 transitions, 875 flow [2025-02-06 13:02:32,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 155 transitions, 818 flow, removed 5 selfloop flow, removed 11 redundant places. [2025-02-06 13:02:32,172 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 166 flow [2025-02-06 13:02:32,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2025-02-06 13:02:32,173 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2025-02-06 13:02:32,173 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 166 flow [2025-02-06 13:02:32,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:32,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:32,173 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:32,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 13:02:32,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:32,373 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:32,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash -416314800, now seen corresponding path program 1 times [2025-02-06 13:02:32,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:32,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252382808] [2025-02-06 13:02:32,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:32,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:32,380 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:02:32,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:02:32,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:32,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:32,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:32,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252382808] [2025-02-06 13:02:32,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252382808] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:32,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702058529] [2025-02-06 13:02:32,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:32,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:32,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:32,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:32,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 13:02:32,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:02:32,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:02:32,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:32,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:32,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:02:32,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:32,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:32,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-06 13:02:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:32,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702058529] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:32,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:32,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2025-02-06 13:02:32,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140588432] [2025-02-06 13:02:32,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:32,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:02:32,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:32,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:02:32,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:02:33,268 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-02-06 13:02:33,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 166 flow. Second operand has 24 states, 24 states have (on average 14.75) internal successors, (354), 24 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:33,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:33,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-02-06 13:02:33,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:38,642 INFO L124 PetriNetUnfolderBase]: 51001/72889 cut-off events. [2025-02-06 13:02:38,642 INFO L125 PetriNetUnfolderBase]: For 36499/37335 co-relation queries the response was YES. [2025-02-06 13:02:38,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173644 conditions, 72889 events. 51001/72889 cut-off events. For 36499/37335 co-relation queries the response was YES. Maximal size of possible extension queue 1264. Compared 458906 event pairs, 16083 based on Foata normal form. 940/66037 useless extension candidates. Maximal degree in co-relation 173607. Up to 24864 conditions per place. [2025-02-06 13:02:39,074 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 115 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2025-02-06 13:02:39,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 125 transitions, 694 flow [2025-02-06 13:02:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2025-02-06 13:02:39,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2025-02-06 13:02:39,076 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 166 flow. Second operand 9 states and 212 transitions. [2025-02-06 13:02:39,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 125 transitions, 694 flow [2025-02-06 13:02:39,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 125 transitions, 666 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:39,256 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 185 flow [2025-02-06 13:02:39,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2025-02-06 13:02:39,256 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2025-02-06 13:02:39,257 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 185 flow [2025-02-06 13:02:39,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.75) internal successors, (354), 24 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:39,257 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:39,257 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:39,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 13:02:39,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:39,461 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:02:39,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:39,462 INFO L85 PathProgramCache]: Analyzing trace with hash -48544745, now seen corresponding path program 2 times [2025-02-06 13:02:39,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:39,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275522516] [2025-02-06 13:02:39,462 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:39,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:39,469 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:02:39,479 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:02:39,479 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:39,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:39,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:39,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275522516] [2025-02-06 13:02:39,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275522516] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:39,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638274391] [2025-02-06 13:02:39,705 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:39,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:39,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:39,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:39,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 13:02:39,761 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:02:39,781 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:02:39,781 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:39,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:39,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 13:02:39,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-06 13:02:39,813 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:39,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638274391] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:39,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:39,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2025-02-06 13:02:39,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753232614] [2025-02-06 13:02:39,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:39,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:39,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:39,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:39,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:02:39,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-02-06 13:02:39,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:39,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:39,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-02-06 13:02:39,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand