./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:02:12,544 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:02:12,621 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:02:12,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:02:12,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:02:12,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:02:12,655 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:02:12,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:02:12,656 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:02:12,656 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:02:12,657 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:02:12,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:02:12,658 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:02:12,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:02:12,658 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:02:12,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:02:12,659 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:02:12,659 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:02:12,659 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:02:12,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:02:12,659 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:02:12,659 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:02:12,659 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:02:12,660 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:12,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:02:12,660 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:02:12,661 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:02:12,661 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:02:12,661 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:02:12,661 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 -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2025-02-06 13:02:12,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:02:12,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:02:12,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:02:12,955 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:02:12,956 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:02:12,957 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2025-02-06 13:02:14,244 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/54070d02d/c8c3afbe9aa34728863bc17bc24eaeba/FLAG96f7e444a [2025-02-06 13:02:14,488 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:02:14,489 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2025-02-06 13:02:14,496 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/54070d02d/c8c3afbe9aa34728863bc17bc24eaeba/FLAG96f7e444a [2025-02-06 13:02:14,508 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/54070d02d/c8c3afbe9aa34728863bc17bc24eaeba [2025-02-06 13:02:14,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:02:14,511 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:02:14,511 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:14,512 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:02:14,514 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:02:14,515 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc62dc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14, skipping insertion in model container [2025-02-06 13:02:14,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,534 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:02:14,713 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 13:02:14,721 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 13:02:14,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:14,743 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:02:14,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:14,797 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:02:14,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14 WrapperNode [2025-02-06 13:02:14,798 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:14,799 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:14,799 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:02:14,799 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:02:14,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,815 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,844 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 279 [2025-02-06 13:02:14,847 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:14,848 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:02:14,848 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:02:14,848 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:02:14,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,865 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,892 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 10, 6]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2025-02-06 13:02:14,892 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,902 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,903 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,904 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,905 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,908 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:02:14,909 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:02:14,909 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:02:14,909 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:02:14,909 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (1/1) ... [2025-02-06 13:02:14,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:14,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:14,937 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 13:02:14,940 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 13:02:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:02:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:02:14,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:02:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:02:14,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:02:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:02:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:02:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 13:02:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:02:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:02:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-06 13:02:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:02:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:02:14,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:02:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:02:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:02:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 13:02:14,964 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 13:02:15,079 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:02:15,080 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:02:15,566 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:02:15,566 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:02:15,886 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:02:15,887 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:02:15,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:15 BoogieIcfgContainer [2025-02-06 13:02:15,887 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:02:15,889 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:02:15,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:02:15,892 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:02:15,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:02:14" (1/3) ... [2025-02-06 13:02:15,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:15, skipping insertion in model container [2025-02-06 13:02:15,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:14" (2/3) ... [2025-02-06 13:02:15,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:15, skipping insertion in model container [2025-02-06 13:02:15,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:15" (3/3) ... [2025-02-06 13:02:15,894 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2025-02-06 13:02:15,911 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:02:15,913 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-node-symm.wvr.c that has 3 procedures, 75 locations, 1 initial locations, 4 loop locations, and 34 error locations. [2025-02-06 13:02:15,913 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:02:15,972 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:02:16,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 82 transitions, 178 flow [2025-02-06 13:02:16,045 INFO L124 PetriNetUnfolderBase]: 8/80 cut-off events. [2025-02-06 13:02:16,049 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:02:16,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 8/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 224 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2025-02-06 13:02:16,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 82 transitions, 178 flow [2025-02-06 13:02:16,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 79 transitions, 170 flow [2025-02-06 13:02:16,070 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:02:16,083 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;@63b853a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:02:16,084 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2025-02-06 13:02:16,087 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:02:16,087 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:02:16,087 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:02:16,087 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:16,088 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:16,088 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:16,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash 835918, now seen corresponding path program 1 times [2025-02-06 13:02:16,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:16,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764479979] [2025-02-06 13:02:16,099 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:16,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:16,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:16,194 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:16,194 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:16,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:16,347 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 13:02:16,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:16,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764479979] [2025-02-06 13:02:16,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764479979] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:16,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:16,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:02:16,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280431141] [2025-02-06 13:02:16,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:16,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:16,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:16,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:16,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:16,452 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:16,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:16,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:16,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:16,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:16,677 INFO L124 PetriNetUnfolderBase]: 192/580 cut-off events. [2025-02-06 13:02:16,677 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-02-06 13:02:16,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 580 events. 192/580 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3514 event pairs, 113 based on Foata normal form. 1/426 useless extension candidates. Maximal degree in co-relation 827. Up to 301 conditions per place. [2025-02-06 13:02:16,685 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 32 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2025-02-06 13:02:16,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 230 flow [2025-02-06 13:02:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2025-02-06 13:02:16,700 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6869918699186992 [2025-02-06 13:02:16,701 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 170 flow. Second operand 3 states and 169 transitions. [2025-02-06 13:02:16,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 230 flow [2025-02-06 13:02:16,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:16,708 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 158 flow [2025-02-06 13:02:16,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2025-02-06 13:02:16,713 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -6 predicate places. [2025-02-06 13:02:16,713 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 158 flow [2025-02-06 13:02:16,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:16,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:16,714 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:16,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:02:16,714 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:16,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:16,715 INFO L85 PathProgramCache]: Analyzing trace with hash 835919, now seen corresponding path program 1 times [2025-02-06 13:02:16,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:16,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863787893] [2025-02-06 13:02:16,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:16,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:16,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:16,764 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:16,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:16,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:17,088 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 13:02:17,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863787893] [2025-02-06 13:02:17,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863787893] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:17,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:17,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:02:17,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51891599] [2025-02-06 13:02:17,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:17,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:17,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:17,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:17,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:17,176 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:17,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 13:02:17,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:17,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:17,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:17,340 INFO L124 PetriNetUnfolderBase]: 192/582 cut-off events. [2025-02-06 13:02:17,340 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:02:17,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 904 conditions, 582 events. 192/582 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3506 event pairs, 113 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 877. Up to 309 conditions per place. [2025-02-06 13:02:17,349 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 36 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2025-02-06 13:02:17,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 238 flow [2025-02-06 13:02:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:17,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2025-02-06 13:02:17,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2025-02-06 13:02:17,354 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 158 flow. Second operand 3 states and 172 transitions. [2025-02-06 13:02:17,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 238 flow [2025-02-06 13:02:17,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:17,357 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 168 flow [2025-02-06 13:02:17,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2025-02-06 13:02:17,360 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2025-02-06 13:02:17,360 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 168 flow [2025-02-06 13:02:17,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 13:02:17,360 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:17,361 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:02:17,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:02:17,361 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:17,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:17,362 INFO L85 PathProgramCache]: Analyzing trace with hash 803343955, now seen corresponding path program 1 times [2025-02-06 13:02:17,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:17,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214782191] [2025-02-06 13:02:17,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:17,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:17,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:17,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:17,392 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:17,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:17,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:17,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214782191] [2025-02-06 13:02:17,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214782191] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:17,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106305869] [2025-02-06 13:02:17,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:17,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:17,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:17,704 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 13:02:17,707 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 13:02:17,768 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:17,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:17,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:17,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:17,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:02:17,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:17,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:02:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:18,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:18,165 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 13:02:18,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106305869] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:18,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:18,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:02:18,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885187106] [2025-02-06 13:02:18,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:18,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:02:18,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:18,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:02:18,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:02:18,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:18,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 168 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 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 13:02:18,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:18,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:18,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:18,950 INFO L124 PetriNetUnfolderBase]: 192/581 cut-off events. [2025-02-06 13:02:18,951 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:02:18,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 581 events. 192/581 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3506 event pairs, 113 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 893. Up to 305 conditions per place. [2025-02-06 13:02:18,955 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 32 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2025-02-06 13:02:18,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 240 flow [2025-02-06 13:02:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 258 transitions. [2025-02-06 13:02:18,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2025-02-06 13:02:18,958 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 168 flow. Second operand 5 states and 258 transitions. [2025-02-06 13:02:18,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 240 flow [2025-02-06 13:02:18,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:18,960 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 180 flow [2025-02-06 13:02:18,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2025-02-06 13:02:18,961 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2025-02-06 13:02:18,961 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 180 flow [2025-02-06 13:02:18,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 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 13:02:18,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:18,962 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:02:18,970 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 13:02:19,166 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 13:02:19,166 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:19,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:19,166 INFO L85 PathProgramCache]: Analyzing trace with hash -866138386, now seen corresponding path program 1 times [2025-02-06 13:02:19,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:19,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020440903] [2025-02-06 13:02:19,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:19,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:19,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:02:19,190 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:02:19,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:19,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:19,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:19,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020440903] [2025-02-06 13:02:19,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020440903] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:19,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:19,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:19,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21879580] [2025-02-06 13:02:19,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:19,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:19,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:19,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:19,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:19,520 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:19,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:19,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:19,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:19,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:19,677 INFO L124 PetriNetUnfolderBase]: 192/583 cut-off events. [2025-02-06 13:02:19,677 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:02:19,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 918 conditions, 583 events. 192/583 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3515 event pairs, 113 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 889. Up to 307 conditions per place. [2025-02-06 13:02:19,681 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 35 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2025-02-06 13:02:19,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 78 transitions, 262 flow [2025-02-06 13:02:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 217 transitions. [2025-02-06 13:02:19,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6615853658536586 [2025-02-06 13:02:19,683 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 180 flow. Second operand 4 states and 217 transitions. [2025-02-06 13:02:19,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 78 transitions, 262 flow [2025-02-06 13:02:19,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 252 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:19,686 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 190 flow [2025-02-06 13:02:19,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2025-02-06 13:02:19,686 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2025-02-06 13:02:19,686 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 190 flow [2025-02-06 13:02:19,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:19,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:19,687 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:19,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:02:19,687 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:19,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash 864693412, now seen corresponding path program 1 times [2025-02-06 13:02:19,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:19,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948527769] [2025-02-06 13:02:19,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:19,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:19,694 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:02:19,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:02:19,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:19,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:19,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:19,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948527769] [2025-02-06 13:02:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948527769] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:19,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937197000] [2025-02-06 13:02:19,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:19,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:19,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:19,970 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 13:02:19,972 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 13:02:20,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:02:20,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:02:20,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:20,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:20,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:02:20,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:20,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:02:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:20,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:20,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937197000] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:20,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:20,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:02:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633322678] [2025-02-06 13:02:20,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:20,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:02:20,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:20,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:02:20,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:02:20,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:20,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 45.61538461538461) internal successors, (593), 13 states have internal predecessors, (593), 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 13:02:20,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:20,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:20,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:21,318 INFO L124 PetriNetUnfolderBase]: 194/588 cut-off events. [2025-02-06 13:02:21,318 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:02:21,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 588 events. 194/588 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3518 event pairs, 113 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 899. Up to 301 conditions per place. [2025-02-06 13:02:21,323 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 28 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2025-02-06 13:02:21,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 303 flow [2025-02-06 13:02:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:02:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:02:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 442 transitions. [2025-02-06 13:02:21,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2025-02-06 13:02:21,325 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 190 flow. Second operand 9 states and 442 transitions. [2025-02-06 13:02:21,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 303 flow [2025-02-06 13:02:21,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:21,328 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 242 flow [2025-02-06 13:02:21,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2025-02-06 13:02:21,329 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2025-02-06 13:02:21,329 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 242 flow [2025-02-06 13:02:21,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.61538461538461) internal successors, (593), 13 states have internal predecessors, (593), 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 13:02:21,329 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:21,329 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:21,338 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 13:02:21,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:21,535 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:21,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1035691572, now seen corresponding path program 1 times [2025-02-06 13:02:21,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:21,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987611474] [2025-02-06 13:02:21,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:21,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:21,556 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:02:21,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:21,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:21,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:21,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:21,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987611474] [2025-02-06 13:02:21,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987611474] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:21,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:21,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:02:21,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939827564] [2025-02-06 13:02:21,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:21,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:21,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:21,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:21,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:21,648 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:21,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:21,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:21,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:21,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:21,758 INFO L124 PetriNetUnfolderBase]: 194/586 cut-off events. [2025-02-06 13:02:21,758 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-02-06 13:02:21,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 586 events. 194/586 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3517 event pairs, 113 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 904. Up to 310 conditions per place. [2025-02-06 13:02:21,762 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 41 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2025-02-06 13:02:21,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 81 transitions, 326 flow [2025-02-06 13:02:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2025-02-06 13:02:21,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2025-02-06 13:02:21,765 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 242 flow. Second operand 3 states and 168 transitions. [2025-02-06 13:02:21,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 81 transitions, 326 flow [2025-02-06 13:02:21,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 307 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:21,768 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 225 flow [2025-02-06 13:02:21,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2025-02-06 13:02:21,770 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2025-02-06 13:02:21,770 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 225 flow [2025-02-06 13:02:21,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:21,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:21,771 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:21,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:02:21,771 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:21,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1035691573, now seen corresponding path program 1 times [2025-02-06 13:02:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:21,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991432114] [2025-02-06 13:02:21,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:21,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:02:21,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:21,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:21,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:21,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:21,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991432114] [2025-02-06 13:02:21,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991432114] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:21,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887902278] [2025-02-06 13:02:21,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:21,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:21,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:21,967 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 13:02:21,969 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 13:02:22,042 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:02:22,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:02:22,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:22,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:22,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:02:22,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:22,119 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 13:02:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:22,125 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:22,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887902278] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:22,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:22,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2025-02-06 13:02:22,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734651271] [2025-02-06 13:02:22,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:22,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:22,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:22,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:22,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:02:22,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:22,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:22,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:22,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:22,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:22,312 INFO L124 PetriNetUnfolderBase]: 195/589 cut-off events. [2025-02-06 13:02:22,312 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:02:22,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 589 events. 195/589 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3523 event pairs, 113 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 910. Up to 318 conditions per place. [2025-02-06 13:02:22,318 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 44 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2025-02-06 13:02:22,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 329 flow [2025-02-06 13:02:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2025-02-06 13:02:22,320 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2025-02-06 13:02:22,321 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 225 flow. Second operand 4 states and 216 transitions. [2025-02-06 13:02:22,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 329 flow [2025-02-06 13:02:22,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 84 transitions, 323 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:22,325 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 243 flow [2025-02-06 13:02:22,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2025-02-06 13:02:22,326 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2025-02-06 13:02:22,328 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 243 flow [2025-02-06 13:02:22,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:22,329 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:22,329 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:22,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 13:02:22,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:22,533 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:22,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:22,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2041670440, now seen corresponding path program 1 times [2025-02-06 13:02:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:22,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921294570] [2025-02-06 13:02:22,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:22,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:22,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:02:22,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:02:22,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:22,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:22,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:22,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921294570] [2025-02-06 13:02:22,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921294570] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:22,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:22,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:22,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337044328] [2025-02-06 13:02:22,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:22,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:22,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:22,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:22,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:22,634 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:02:22,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:22,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:22,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:02:22,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:22,767 INFO L124 PetriNetUnfolderBase]: 194/588 cut-off events. [2025-02-06 13:02:22,767 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-02-06 13:02:22,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 588 events. 194/588 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3504 event pairs, 113 based on Foata normal form. 1/437 useless extension candidates. Maximal degree in co-relation 910. Up to 315 conditions per place. [2025-02-06 13:02:22,771 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 42 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2025-02-06 13:02:22,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 332 flow [2025-02-06 13:02:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2025-02-06 13:02:22,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6737804878048781 [2025-02-06 13:02:22,773 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 243 flow. Second operand 4 states and 221 transitions. [2025-02-06 13:02:22,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 332 flow [2025-02-06 13:02:22,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:22,776 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 241 flow [2025-02-06 13:02:22,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2025-02-06 13:02:22,778 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2025-02-06 13:02:22,779 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 241 flow [2025-02-06 13:02:22,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:22,779 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:22,779 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:22,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:02:22,780 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:22,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:22,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1132785650, now seen corresponding path program 1 times [2025-02-06 13:02:22,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:22,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381133429] [2025-02-06 13:02:22,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:22,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:22,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:02:22,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:02:22,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:22,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:22,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381133429] [2025-02-06 13:02:22,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381133429] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684636835] [2025-02-06 13:02:22,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:22,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:22,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:22,910 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 13:02:22,913 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 13:02:22,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:02:22,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:02:22,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:22,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:22,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:02:23,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:23,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:02:23,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684636835] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:23,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:23,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:02:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311004177] [2025-02-06 13:02:23,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:23,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:02:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:23,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:02:23,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:02:23,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:02:23,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 47.785714285714285) internal successors, (669), 14 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:23,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:23,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:02:23,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:23,654 INFO L124 PetriNetUnfolderBase]: 377/1135 cut-off events. [2025-02-06 13:02:23,655 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-02-06 13:02:23,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1822 conditions, 1135 events. 377/1135 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8177 event pairs, 225 based on Foata normal form. 1/851 useless extension candidates. Maximal degree in co-relation 905. Up to 301 conditions per place. [2025-02-06 13:02:23,661 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 58 selfloop transitions, 22 changer transitions 0/117 dead transitions. [2025-02-06 13:02:23,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 505 flow [2025-02-06 13:02:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 530 transitions. [2025-02-06 13:02:23,667 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2025-02-06 13:02:23,667 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 241 flow. Second operand 10 states and 530 transitions. [2025-02-06 13:02:23,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 505 flow [2025-02-06 13:02:23,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 491 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:23,671 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 345 flow [2025-02-06 13:02:23,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=345, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2025-02-06 13:02:23,671 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2025-02-06 13:02:23,673 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 345 flow [2025-02-06 13:02:23,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 47.785714285714285) internal successors, (669), 14 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:02:23,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:23,673 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:23,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:23,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-06 13:02:23,874 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:23,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash -756614033, now seen corresponding path program 1 times [2025-02-06 13:02:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:23,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671709930] [2025-02-06 13:02:23,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:23,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:23,883 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:02:23,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:02:23,895 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:23,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:02:24,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:24,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671709930] [2025-02-06 13:02:24,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671709930] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:24,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:24,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:24,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213707087] [2025-02-06 13:02:24,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:24,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:24,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:24,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:24,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:24,176 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:24,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 345 flow. Second operand has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 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 13:02:24,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:24,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:24,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:24,403 INFO L124 PetriNetUnfolderBase]: 384/1168 cut-off events. [2025-02-06 13:02:24,404 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-02-06 13:02:24,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 1168 events. 384/1168 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8429 event pairs, 226 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 927. Up to 628 conditions per place. [2025-02-06 13:02:24,414 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 55 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2025-02-06 13:02:24,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 94 transitions, 467 flow [2025-02-06 13:02:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2025-02-06 13:02:24,416 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2025-02-06 13:02:24,416 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 345 flow. Second operand 4 states and 216 transitions. [2025-02-06 13:02:24,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 94 transitions, 467 flow [2025-02-06 13:02:24,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 94 transitions, 463 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:24,422 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 360 flow [2025-02-06 13:02:24,423 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=360, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2025-02-06 13:02:24,424 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2025-02-06 13:02:24,424 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 360 flow [2025-02-06 13:02:24,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 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 13:02:24,424 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:24,424 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:24,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:02:24,424 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:24,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash 767891730, now seen corresponding path program 2 times [2025-02-06 13:02:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134033691] [2025-02-06 13:02:24,425 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:24,435 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-06 13:02:24,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:02:24,446 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:24,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:24,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:24,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134033691] [2025-02-06 13:02:24,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134033691] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:24,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345590268] [2025-02-06 13:02:24,603 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:24,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:24,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:24,605 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 13:02:24,608 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 13:02:24,663 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-06 13:02:24,685 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:02:24,686 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:24,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:24,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:02:24,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:24,741 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 13:02:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:24,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:24,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345590268] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:24,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:24,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 12 [2025-02-06 13:02:24,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35573692] [2025-02-06 13:02:24,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:24,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:02:24,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:24,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:02:24,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:02:25,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:25,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 360 flow. Second operand has 14 states, 14 states have (on average 46.142857142857146) internal successors, (646), 14 states have internal predecessors, (646), 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 13:02:25,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:25,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:25,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:25,710 INFO L124 PetriNetUnfolderBase]: 384/1167 cut-off events. [2025-02-06 13:02:25,710 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-02-06 13:02:25,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 1167 events. 384/1167 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8414 event pairs, 226 based on Foata normal form. 0/867 useless extension candidates. Maximal degree in co-relation 930. Up to 615 conditions per place. [2025-02-06 13:02:25,718 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 41 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2025-02-06 13:02:25,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 93 transitions, 476 flow [2025-02-06 13:02:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:02:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:02:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 394 transitions. [2025-02-06 13:02:25,720 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2025-02-06 13:02:25,720 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 360 flow. Second operand 8 states and 394 transitions. [2025-02-06 13:02:25,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 93 transitions, 476 flow [2025-02-06 13:02:25,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 93 transitions, 471 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:25,723 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 389 flow [2025-02-06 13:02:25,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=389, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2025-02-06 13:02:25,725 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 20 predicate places. [2025-02-06 13:02:25,725 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 389 flow [2025-02-06 13:02:25,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.142857142857146) internal successors, (646), 14 states have internal predecessors, (646), 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 13:02:25,726 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:25,726 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:25,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:02:25,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-06 13:02:25,930 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:25,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1256585574, now seen corresponding path program 1 times [2025-02-06 13:02:25,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:25,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978886886] [2025-02-06 13:02:25,931 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:25,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:02:25,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:02:25,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:25,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:26,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:26,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978886886] [2025-02-06 13:02:26,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978886886] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:26,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542132884] [2025-02-06 13:02:26,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:26,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:26,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:26,099 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 13:02:26,101 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 13:02:26,160 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:02:26,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:02:26,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:26,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:26,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:02:26,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:26,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:02:26,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542132884] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:26,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:26,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-06 13:02:26,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809178230] [2025-02-06 13:02:26,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:26,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:02:26,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:26,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:02:26,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:02:26,489 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:02:26,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 389 flow. Second operand has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 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 13:02:26,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:26,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:02:26,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:26,840 INFO L124 PetriNetUnfolderBase]: 745/2245 cut-off events. [2025-02-06 13:02:26,840 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-02-06 13:02:26,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3627 conditions, 2245 events. 745/2245 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19059 event pairs, 450 based on Foata normal form. 2/1685 useless extension candidates. Maximal degree in co-relation 1790. Up to 596 conditions per place. [2025-02-06 13:02:26,862 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 66 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2025-02-06 13:02:26,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 676 flow [2025-02-06 13:02:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:02:26,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:02:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 436 transitions. [2025-02-06 13:02:26,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2025-02-06 13:02:26,864 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 389 flow. Second operand 8 states and 436 transitions. [2025-02-06 13:02:26,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 676 flow [2025-02-06 13:02:26,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 124 transitions, 600 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-02-06 13:02:26,867 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 422 flow [2025-02-06 13:02:26,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=422, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2025-02-06 13:02:26,868 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 23 predicate places. [2025-02-06 13:02:26,868 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 422 flow [2025-02-06 13:02:26,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 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 13:02:26,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:26,869 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:26,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 13:02:27,069 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,SelfDestructingSolverStorable11 [2025-02-06 13:02:27,070 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:27,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1162455472, now seen corresponding path program 2 times [2025-02-06 13:02:27,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:27,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984656256] [2025-02-06 13:02:27,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:27,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:27,079 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:02:27,100 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:27,100 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:27,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:27,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:27,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984656256] [2025-02-06 13:02:27,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984656256] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:27,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145421860] [2025-02-06 13:02:27,336 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:27,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:27,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:27,339 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 13:02:27,340 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 13:02:27,406 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:02:27,448 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:27,449 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:27,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:27,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 13:02:27,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:27,500 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 13:02:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:02:27,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:27,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145421860] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:27,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:27,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 12 [2025-02-06 13:02:27,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504639007] [2025-02-06 13:02:27,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:27,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:02:27,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:27,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:02:27,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:02:28,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:28,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 422 flow. Second operand has 14 states, 14 states have (on average 46.57142857142857) internal successors, (652), 14 states have internal predecessors, (652), 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 13:02:28,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:28,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:28,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:28,431 INFO L124 PetriNetUnfolderBase]: 759/2301 cut-off events. [2025-02-06 13:02:28,431 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2025-02-06 13:02:28,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3701 conditions, 2301 events. 759/2301 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19520 event pairs, 452 based on Foata normal form. 0/1705 useless extension candidates. Maximal degree in co-relation 1820. Up to 1207 conditions per place. [2025-02-06 13:02:28,445 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 45 selfloop transitions, 17 changer transitions 0/97 dead transitions. [2025-02-06 13:02:28,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 97 transitions, 546 flow [2025-02-06 13:02:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:02:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:02:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 393 transitions. [2025-02-06 13:02:28,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5990853658536586 [2025-02-06 13:02:28,448 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 422 flow. Second operand 8 states and 393 transitions. [2025-02-06 13:02:28,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 97 transitions, 546 flow [2025-02-06 13:02:28,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 97 transitions, 520 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:28,451 INFO L231 Difference]: Finished difference. Result has 105 places, 97 transitions, 430 flow [2025-02-06 13:02:28,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=430, PETRI_PLACES=105, PETRI_TRANSITIONS=97} [2025-02-06 13:02:28,452 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 27 predicate places. [2025-02-06 13:02:28,452 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 97 transitions, 430 flow [2025-02-06 13:02:28,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.57142857142857) internal successors, (652), 14 states have internal predecessors, (652), 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 13:02:28,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:28,453 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:28,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 13:02:28,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:28,655 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:28,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash -692811241, now seen corresponding path program 1 times [2025-02-06 13:02:28,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:28,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117459440] [2025-02-06 13:02:28,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:28,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:28,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:02:28,678 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:28,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:28,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:28,863 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 13:02:28,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:28,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117459440] [2025-02-06 13:02:28,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117459440] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:28,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:28,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:02:28,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668573570] [2025-02-06 13:02:28,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:28,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:28,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:28,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:28,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:28,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2025-02-06 13:02:28,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 97 transitions, 430 flow. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 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 13:02:28,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:28,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2025-02-06 13:02:28,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:29,197 INFO L124 PetriNetUnfolderBase]: 847/2321 cut-off events. [2025-02-06 13:02:29,197 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-02-06 13:02:29,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 2321 events. 847/2321 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 18991 event pairs, 524 based on Foata normal form. 0/1881 useless extension candidates. Maximal degree in co-relation 1911. Up to 1352 conditions per place. [2025-02-06 13:02:29,212 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 56 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2025-02-06 13:02:29,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 93 transitions, 548 flow [2025-02-06 13:02:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:29,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2025-02-06 13:02:29,213 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2025-02-06 13:02:29,213 INFO L175 Difference]: Start difference. First operand has 105 places, 97 transitions, 430 flow. Second operand 5 states and 234 transitions. [2025-02-06 13:02:29,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 93 transitions, 548 flow [2025-02-06 13:02:29,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 93 transitions, 496 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-06 13:02:29,216 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 384 flow [2025-02-06 13:02:29,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2025-02-06 13:02:29,216 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 20 predicate places. [2025-02-06 13:02:29,216 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 384 flow [2025-02-06 13:02:29,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 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 13:02:29,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:29,217 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:29,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:02:29,217 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:29,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash -692811240, now seen corresponding path program 1 times [2025-02-06 13:02:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:29,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253793702] [2025-02-06 13:02:29,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:29,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:29,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:02:29,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:29,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:29,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:02:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253793702] [2025-02-06 13:02:29,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253793702] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113931554] [2025-02-06 13:02:29,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:29,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:29,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:29,646 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 13:02:29,649 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 13:02:29,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:02:29,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:02:29,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:29,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:29,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 13:02:29,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:29,756 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 13:02:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:02:29,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-06 13:02:29,854 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-02-06 13:02:29,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-02-06 13:02:29,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:02:29,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-06 13:02:29,979 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2025-02-06 13:02:29,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2025-02-06 13:02:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:02:30,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-06 13:02:30,045 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-02-06 13:02:30,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2025-02-06 13:02:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:30,092 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:30,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113931554] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:30,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:30,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2025-02-06 13:02:30,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150871347] [2025-02-06 13:02:30,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:30,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:02:30,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:30,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:02:30,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:02:30,293 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2025-02-06 13:02:30,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 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 13:02:30,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:30,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2025-02-06 13:02:30,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:30,529 INFO L124 PetriNetUnfolderBase]: 759/2069 cut-off events. [2025-02-06 13:02:30,529 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-02-06 13:02:30,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3445 conditions, 2069 events. 759/2069 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16237 event pairs, 452 based on Foata normal form. 80/1715 useless extension candidates. Maximal degree in co-relation 1694. Up to 1222 conditions per place. [2025-02-06 13:02:30,540 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 59 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2025-02-06 13:02:30,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 89 transitions, 500 flow [2025-02-06 13:02:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:30,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2025-02-06 13:02:30,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2025-02-06 13:02:30,541 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 384 flow. Second operand 4 states and 182 transitions. [2025-02-06 13:02:30,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 89 transitions, 500 flow [2025-02-06 13:02:30,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 89 transitions, 490 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:30,544 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 372 flow [2025-02-06 13:02:30,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=372, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2025-02-06 13:02:30,544 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2025-02-06 13:02:30,544 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 372 flow [2025-02-06 13:02:30,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 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 13:02:30,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:30,545 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:30,552 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 13:02:30,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-06 13:02:30,746 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:30,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:30,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2311088, now seen corresponding path program 1 times [2025-02-06 13:02:30,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:30,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542058253] [2025-02-06 13:02:30,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:30,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:30,754 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:02:30,764 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:02:30,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:30,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:02:30,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:30,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542058253] [2025-02-06 13:02:30,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542058253] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:30,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916652177] [2025-02-06 13:02:30,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:30,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:30,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:30,900 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 13:02:30,902 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 13:02:30,967 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:02:30,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:02:30,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:30,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:30,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:02:31,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:31,003 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 13:02:31,023 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-06 13:02:31,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-06 13:02:31,037 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-06 13:02:31,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-06 13:02:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-06 13:02:31,052 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:02:31,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916652177] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:31,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:02:31,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2025-02-06 13:02:31,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225407117] [2025-02-06 13:02:31,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:31,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:31,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:31,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:31,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:31,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2025-02-06 13:02:31,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 372 flow. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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 13:02:31,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:31,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2025-02-06 13:02:31,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:31,304 INFO L124 PetriNetUnfolderBase]: 863/2085 cut-off events. [2025-02-06 13:02:31,304 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2025-02-06 13:02:31,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 2085 events. 863/2085 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15236 event pairs, 532 based on Foata normal form. 0/1831 useless extension candidates. Maximal degree in co-relation 1784. Up to 1372 conditions per place. [2025-02-06 13:02:31,317 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 58 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2025-02-06 13:02:31,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 85 transitions, 490 flow [2025-02-06 13:02:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2025-02-06 13:02:31,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2025-02-06 13:02:31,319 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 372 flow. Second operand 4 states and 195 transitions. [2025-02-06 13:02:31,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 85 transitions, 490 flow [2025-02-06 13:02:31,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 85 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:31,323 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 370 flow [2025-02-06 13:02:31,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2025-02-06 13:02:31,324 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2025-02-06 13:02:31,324 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 370 flow [2025-02-06 13:02:31,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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 13:02:31,325 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:31,325 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:31,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:31,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:31,527 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:31,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2311087, now seen corresponding path program 1 times [2025-02-06 13:02:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:31,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420635019] [2025-02-06 13:02:31,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:31,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:02:31,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:02:31,549 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:31,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:02:31,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:31,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420635019] [2025-02-06 13:02:31,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420635019] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:31,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217436415] [2025-02-06 13:02:31,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:31,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:31,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:31,873 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 13:02:31,874 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 13:02:31,942 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:02:31,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:02:31,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:31,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:31,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 13:02:31,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:31,992 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 13:02:32,069 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 13:02:32,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2025-02-06 13:02:32,089 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-06 13:02:32,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-06 13:02:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:02:32,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-06 13:02:32,147 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:02:32,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:02:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:02:32,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:32,408 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 188 treesize of output 182 [2025-02-06 13:02:32,593 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:02:32,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 100 [2025-02-06 13:02:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:02:32,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217436415] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:32,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:32,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-02-06 13:02:32,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084019801] [2025-02-06 13:02:32,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:32,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:02:32,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:32,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:02:32,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:02:33,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 82 [2025-02-06 13:02:33,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 370 flow. Second operand has 15 states, 15 states have (on average 35.8) internal successors, (537), 15 states have internal predecessors, (537), 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 13:02:33,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:33,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 82 [2025-02-06 13:02:33,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:33,791 INFO L124 PetriNetUnfolderBase]: 863/1961 cut-off events. [2025-02-06 13:02:33,791 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-02-06 13:02:33,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3505 conditions, 1961 events. 863/1961 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13580 event pairs, 532 based on Foata normal form. 0/1707 useless extension candidates. Maximal degree in co-relation 1724. Up to 1340 conditions per place. [2025-02-06 13:02:33,801 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 49 selfloop transitions, 14 changer transitions 0/81 dead transitions. [2025-02-06 13:02:33,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 81 transitions, 488 flow [2025-02-06 13:02:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:02:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:02:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 271 transitions. [2025-02-06 13:02:33,803 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4721254355400697 [2025-02-06 13:02:33,803 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 370 flow. Second operand 7 states and 271 transitions. [2025-02-06 13:02:33,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 81 transitions, 488 flow [2025-02-06 13:02:33,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 81 transitions, 482 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:33,805 INFO L231 Difference]: Finished difference. Result has 91 places, 81 transitions, 384 flow [2025-02-06 13:02:33,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=91, PETRI_TRANSITIONS=81} [2025-02-06 13:02:33,807 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2025-02-06 13:02:33,807 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 81 transitions, 384 flow [2025-02-06 13:02:33,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 35.8) internal successors, (537), 15 states have internal predecessors, (537), 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 13:02:33,808 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:33,808 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:33,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 13:02:34,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-06 13:02:34,009 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:34,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash -71642822, now seen corresponding path program 1 times [2025-02-06 13:02:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:34,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693547913] [2025-02-06 13:02:34,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:34,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:34,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:02:34,028 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:02:34,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:34,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:02:34,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:34,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693547913] [2025-02-06 13:02:34,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693547913] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:34,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440014613] [2025-02-06 13:02:34,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:34,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:34,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:34,098 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:34,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 13:02:34,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:02:34,199 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:02:34,199 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:34,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:34,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 13:02:34,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:34,210 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 13:02:34,226 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-06 13:02:34,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-06 13:02:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:02:34,244 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:02:34,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440014613] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:34,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:34,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2025-02-06 13:02:34,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621432935] [2025-02-06 13:02:34,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:34,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:02:34,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:34,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:02:34,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:02:34,347 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-02-06 13:02:34,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 81 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 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 13:02:34,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:34,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-02-06 13:02:34,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:34,543 INFO L124 PetriNetUnfolderBase]: 759/1773 cut-off events. [2025-02-06 13:02:34,543 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2025-02-06 13:02:34,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 1773 events. 759/1773 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12213 event pairs, 452 based on Foata normal form. 0/1577 useless extension candidates. Maximal degree in co-relation 1552. Up to 1176 conditions per place. [2025-02-06 13:02:34,552 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 52 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2025-02-06 13:02:34,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 504 flow [2025-02-06 13:02:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:02:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:02:34,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2025-02-06 13:02:34,554 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-02-06 13:02:34,554 INFO L175 Difference]: Start difference. First operand has 91 places, 81 transitions, 384 flow. Second operand 5 states and 246 transitions. [2025-02-06 13:02:34,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 504 flow [2025-02-06 13:02:34,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 79 transitions, 478 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:34,556 INFO L231 Difference]: Finished difference. Result has 88 places, 79 transitions, 374 flow [2025-02-06 13:02:34,557 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=88, PETRI_TRANSITIONS=79} [2025-02-06 13:02:34,557 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2025-02-06 13:02:34,558 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 374 flow [2025-02-06 13:02:34,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 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 13:02:34,558 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:34,558 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:34,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 13:02:34,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 13:02:34,758 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:34,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:34,759 INFO L85 PathProgramCache]: Analyzing trace with hash -71642821, now seen corresponding path program 1 times [2025-02-06 13:02:34,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:34,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099179364] [2025-02-06 13:02:34,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:34,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:34,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:02:34,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:02:34,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:34,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:34,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:34,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099179364] [2025-02-06 13:02:34,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099179364] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:34,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683921711] [2025-02-06 13:02:34,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:34,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:34,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:34,992 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:34,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 13:02:35,067 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:02:35,095 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:02:35,096 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:35,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:35,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:02:35,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:35,152 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 13:02:35,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:02:35,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 13:02:35,221 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:02:35,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:02:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:35,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:35,371 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 53 treesize of output 49 [2025-02-06 13:02:35,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:02:35,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2025-02-06 13:02:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683921711] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:35,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:35,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-02-06 13:02:35,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780609061] [2025-02-06 13:02:35,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:35,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 13:02:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:35,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 13:02:35,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-02-06 13:02:36,579 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-02-06 13:02:36,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 374 flow. Second operand has 18 states, 18 states have (on average 44.611111111111114) internal successors, (803), 18 states have internal predecessors, (803), 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 13:02:36,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:36,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-02-06 13:02:36,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:36,999 INFO L124 PetriNetUnfolderBase]: 881/2049 cut-off events. [2025-02-06 13:02:36,999 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-02-06 13:02:37,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3666 conditions, 2049 events. 881/2049 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14607 event pairs, 374 based on Foata normal form. 0/1793 useless extension candidates. Maximal degree in co-relation 2086. Up to 588 conditions per place. [2025-02-06 13:02:37,008 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 77 selfloop transitions, 29 changer transitions 0/121 dead transitions. [2025-02-06 13:02:37,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 121 transitions, 695 flow [2025-02-06 13:02:37,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 13:02:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 13:02:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 636 transitions. [2025-02-06 13:02:37,012 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5966228893058161 [2025-02-06 13:02:37,012 INFO L175 Difference]: Start difference. First operand has 88 places, 79 transitions, 374 flow. Second operand 13 states and 636 transitions. [2025-02-06 13:02:37,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 121 transitions, 695 flow [2025-02-06 13:02:37,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 121 transitions, 675 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:37,015 INFO L231 Difference]: Finished difference. Result has 102 places, 85 transitions, 486 flow [2025-02-06 13:02:37,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=486, PETRI_PLACES=102, PETRI_TRANSITIONS=85} [2025-02-06 13:02:37,015 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 24 predicate places. [2025-02-06 13:02:37,016 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 85 transitions, 486 flow [2025-02-06 13:02:37,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 44.611111111111114) internal successors, (803), 18 states have internal predecessors, (803), 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 13:02:37,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:37,016 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:37,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 13:02:37,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:37,217 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:37,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:37,217 INFO L85 PathProgramCache]: Analyzing trace with hash -313959497, now seen corresponding path program 2 times [2025-02-06 13:02:37,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:37,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517421201] [2025-02-06 13:02:37,218 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:37,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:37,225 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:02:37,238 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:02:37,238 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:37,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:37,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:37,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517421201] [2025-02-06 13:02:37,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517421201] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:37,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865237005] [2025-02-06 13:02:37,341 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:37,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:37,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:37,343 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:37,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 13:02:37,420 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-06 13:02:37,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:02:37,451 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:37,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:37,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:02:37,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:37,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:37,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865237005] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:37,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:37,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:02:37,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454262889] [2025-02-06 13:02:37,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:37,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:02:37,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:37,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:02:37,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:02:37,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:02:37,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 85 transitions, 486 flow. Second operand has 14 states, 14 states have (on average 48.357142857142854) internal successors, (677), 14 states have internal predecessors, (677), 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 13:02:37,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:37,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:02:37,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:38,113 INFO L124 PetriNetUnfolderBase]: 827/1915 cut-off events. [2025-02-06 13:02:38,113 INFO L125 PetriNetUnfolderBase]: For 292/316 co-relation queries the response was YES. [2025-02-06 13:02:38,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3715 conditions, 1915 events. 827/1915 cut-off events. For 292/316 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13179 event pairs, 508 based on Foata normal form. 2/1717 useless extension candidates. Maximal degree in co-relation 2210. Up to 726 conditions per place. [2025-02-06 13:02:38,122 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 72 selfloop transitions, 23 changer transitions 0/112 dead transitions. [2025-02-06 13:02:38,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 112 transitions, 742 flow [2025-02-06 13:02:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 533 transitions. [2025-02-06 13:02:38,124 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2025-02-06 13:02:38,124 INFO L175 Difference]: Start difference. First operand has 102 places, 85 transitions, 486 flow. Second operand 10 states and 533 transitions. [2025-02-06 13:02:38,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 112 transitions, 742 flow [2025-02-06 13:02:38,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 112 transitions, 698 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 13:02:38,129 INFO L231 Difference]: Finished difference. Result has 106 places, 91 transitions, 534 flow [2025-02-06 13:02:38,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=534, PETRI_PLACES=106, PETRI_TRANSITIONS=91} [2025-02-06 13:02:38,130 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 28 predicate places. [2025-02-06 13:02:38,130 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 91 transitions, 534 flow [2025-02-06 13:02:38,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.357142857142854) internal successors, (677), 14 states have internal predecessors, (677), 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 13:02:38,131 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:38,131 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:38,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 13:02:38,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:38,332 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:38,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:38,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2118879758, now seen corresponding path program 1 times [2025-02-06 13:02:38,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:38,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100476114] [2025-02-06 13:02:38,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:38,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:38,342 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:02:38,348 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:02:38,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:38,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-06 13:02:38,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:38,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100476114] [2025-02-06 13:02:38,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100476114] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:38,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:38,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940739968] [2025-02-06 13:02:38,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:38,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:38,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:38,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:38,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:38,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-02-06 13:02:38,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 91 transitions, 534 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 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 13:02:38,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:38,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-02-06 13:02:38,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:38,630 INFO L124 PetriNetUnfolderBase]: 817/1849 cut-off events. [2025-02-06 13:02:38,630 INFO L125 PetriNetUnfolderBase]: For 276/296 co-relation queries the response was YES. [2025-02-06 13:02:38,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3671 conditions, 1849 events. 817/1849 cut-off events. For 276/296 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12361 event pairs, 492 based on Foata normal form. 0/1713 useless extension candidates. Maximal degree in co-relation 2196. Up to 1284 conditions per place. [2025-02-06 13:02:38,641 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 66 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2025-02-06 13:02:38,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 89 transitions, 678 flow [2025-02-06 13:02:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:02:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:02:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2025-02-06 13:02:38,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2025-02-06 13:02:38,643 INFO L175 Difference]: Start difference. First operand has 106 places, 91 transitions, 534 flow. Second operand 4 states and 204 transitions. [2025-02-06 13:02:38,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 89 transitions, 678 flow [2025-02-06 13:02:38,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 89 transitions, 650 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-02-06 13:02:38,647 INFO L231 Difference]: Finished difference. Result has 103 places, 89 transitions, 518 flow [2025-02-06 13:02:38,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=518, PETRI_PLACES=103, PETRI_TRANSITIONS=89} [2025-02-06 13:02:38,647 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 25 predicate places. [2025-02-06 13:02:38,648 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 89 transitions, 518 flow [2025-02-06 13:02:38,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 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 13:02:38,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:38,648 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:38,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-06 13:02:38,648 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:38,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:38,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2118879757, now seen corresponding path program 1 times [2025-02-06 13:02:38,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:38,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068736979] [2025-02-06 13:02:38,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:38,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:38,657 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:02:38,663 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:02:38,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:38,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:38,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068736979] [2025-02-06 13:02:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068736979] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314668836] [2025-02-06 13:02:38,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:38,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:38,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:38,870 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:38,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 13:02:38,956 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:02:38,986 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:02:38,986 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:38,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:38,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 13:02:38,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:39,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:39,182 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 23 treesize of output 19 [2025-02-06 13:02:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:39,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314668836] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:39,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:39,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-06 13:02:39,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299847467] [2025-02-06 13:02:39,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:39,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 13:02:39,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:39,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 13:02:39,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2025-02-06 13:02:39,747 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:39,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 89 transitions, 518 flow. Second operand has 19 states, 19 states have (on average 46.473684210526315) internal successors, (883), 19 states have internal predecessors, (883), 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 13:02:39,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:39,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:39,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:40,231 INFO L124 PetriNetUnfolderBase]: 953/2095 cut-off events. [2025-02-06 13:02:40,231 INFO L125 PetriNetUnfolderBase]: For 297/320 co-relation queries the response was YES. [2025-02-06 13:02:40,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4175 conditions, 2095 events. 953/2095 cut-off events. For 297/320 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13995 event pairs, 404 based on Foata normal form. 0/1913 useless extension candidates. Maximal degree in co-relation 2442. Up to 642 conditions per place. [2025-02-06 13:02:40,239 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 96 selfloop transitions, 28 changer transitions 0/137 dead transitions. [2025-02-06 13:02:40,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 137 transitions, 922 flow [2025-02-06 13:02:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:02:40,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:02:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 573 transitions. [2025-02-06 13:02:40,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6352549889135255 [2025-02-06 13:02:40,241 INFO L175 Difference]: Start difference. First operand has 103 places, 89 transitions, 518 flow. Second operand 11 states and 573 transitions. [2025-02-06 13:02:40,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 137 transitions, 922 flow [2025-02-06 13:02:40,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 137 transitions, 910 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:40,245 INFO L231 Difference]: Finished difference. Result has 115 places, 93 transitions, 618 flow [2025-02-06 13:02:40,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=618, PETRI_PLACES=115, PETRI_TRANSITIONS=93} [2025-02-06 13:02:40,246 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 37 predicate places. [2025-02-06 13:02:40,246 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 93 transitions, 618 flow [2025-02-06 13:02:40,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 46.473684210526315) internal successors, (883), 19 states have internal predecessors, (883), 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 13:02:40,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:40,246 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:40,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-06 13:02:40,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-02-06 13:02:40,447 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:40,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:40,448 INFO L85 PathProgramCache]: Analyzing trace with hash 14617429, now seen corresponding path program 1 times [2025-02-06 13:02:40,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:40,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682988372] [2025-02-06 13:02:40,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:40,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:40,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:02:40,463 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:02:40,463 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:40,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:40,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:40,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682988372] [2025-02-06 13:02:40,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682988372] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:40,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536028698] [2025-02-06 13:02:40,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:40,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:40,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:40,561 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:40,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 13:02:40,643 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:02:40,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:02:40,675 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:40,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:40,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:02:40,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:40,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:02:40,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536028698] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:40,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:40,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-06 13:02:40,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048866] [2025-02-06 13:02:40,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:40,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:02:40,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:40,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:02:40,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:02:40,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:02:40,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 93 transitions, 618 flow. Second operand has 14 states, 14 states have (on average 48.42857142857143) internal successors, (678), 14 states have internal predecessors, (678), 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 13:02:40,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:40,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:02:40,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:41,300 INFO L124 PetriNetUnfolderBase]: 905/2017 cut-off events. [2025-02-06 13:02:41,300 INFO L125 PetriNetUnfolderBase]: For 534/572 co-relation queries the response was YES. [2025-02-06 13:02:41,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4309 conditions, 2017 events. 905/2017 cut-off events. For 534/572 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13369 event pairs, 558 based on Foata normal form. 2/1881 useless extension candidates. Maximal degree in co-relation 2590. Up to 812 conditions per place. [2025-02-06 13:02:41,310 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 73 selfloop transitions, 40 changer transitions 0/128 dead transitions. [2025-02-06 13:02:41,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 128 transitions, 977 flow [2025-02-06 13:02:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 530 transitions. [2025-02-06 13:02:41,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2025-02-06 13:02:41,312 INFO L175 Difference]: Start difference. First operand has 115 places, 93 transitions, 618 flow. Second operand 10 states and 530 transitions. [2025-02-06 13:02:41,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 128 transitions, 977 flow [2025-02-06 13:02:41,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 128 transitions, 952 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:41,322 INFO L231 Difference]: Finished difference. Result has 122 places, 105 transitions, 790 flow [2025-02-06 13:02:41,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=790, PETRI_PLACES=122, PETRI_TRANSITIONS=105} [2025-02-06 13:02:41,323 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 44 predicate places. [2025-02-06 13:02:41,323 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 105 transitions, 790 flow [2025-02-06 13:02:41,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.42857142857143) internal successors, (678), 14 states have internal predecessors, (678), 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 13:02:41,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:41,324 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:41,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 13:02:41,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:41,525 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:41,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:41,525 INFO L85 PathProgramCache]: Analyzing trace with hash -102758658, now seen corresponding path program 3 times [2025-02-06 13:02:41,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:41,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735120455] [2025-02-06 13:02:41,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:41,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:41,535 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 5 equivalence classes. [2025-02-06 13:02:41,580 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 20 of 22 statements. [2025-02-06 13:02:41,581 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-06 13:02:41,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:02:41,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:41,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735120455] [2025-02-06 13:02:41,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735120455] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:41,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376881482] [2025-02-06 13:02:41,840 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:41,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:41,842 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:41,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 13:02:41,923 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 5 equivalence classes. [2025-02-06 13:02:42,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 20 of 22 statements. [2025-02-06 13:02:42,042 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-06 13:02:42,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:42,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-06 13:02:42,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:42,134 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 13:02:42,141 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 13:02:42,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:02:42,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 13:02:42,221 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:02:42,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:02:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:02:42,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:42,435 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 13:02:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:02:42,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376881482] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:42,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:42,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2025-02-06 13:02:42,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872057410] [2025-02-06 13:02:42,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:42,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:02:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:42,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:02:42,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:02:43,854 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-02-06 13:02:43,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 105 transitions, 790 flow. Second operand has 24 states, 24 states have (on average 44.333333333333336) internal successors, (1064), 24 states have internal predecessors, (1064), 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 13:02:43,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:43,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-02-06 13:02:43,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:44,637 INFO L124 PetriNetUnfolderBase]: 1349/2942 cut-off events. [2025-02-06 13:02:44,637 INFO L125 PetriNetUnfolderBase]: For 956/969 co-relation queries the response was YES. [2025-02-06 13:02:44,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6352 conditions, 2942 events. 1349/2942 cut-off events. For 956/969 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20517 event pairs, 851 based on Foata normal form. 80/2837 useless extension candidates. Maximal degree in co-relation 4581. Up to 754 conditions per place. [2025-02-06 13:02:44,649 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 141 selfloop transitions, 32 changer transitions 0/186 dead transitions. [2025-02-06 13:02:44,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 186 transitions, 1620 flow [2025-02-06 13:02:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 13:02:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 13:02:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 865 transitions. [2025-02-06 13:02:44,651 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5860433604336044 [2025-02-06 13:02:44,651 INFO L175 Difference]: Start difference. First operand has 122 places, 105 transitions, 790 flow. Second operand 18 states and 865 transitions. [2025-02-06 13:02:44,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 186 transitions, 1620 flow [2025-02-06 13:02:44,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 186 transitions, 1557 flow, removed 9 selfloop flow, removed 7 redundant places. [2025-02-06 13:02:44,659 INFO L231 Difference]: Finished difference. Result has 134 places, 117 transitions, 982 flow [2025-02-06 13:02:44,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=982, PETRI_PLACES=134, PETRI_TRANSITIONS=117} [2025-02-06 13:02:44,659 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 56 predicate places. [2025-02-06 13:02:44,659 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 117 transitions, 982 flow [2025-02-06 13:02:44,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 44.333333333333336) internal successors, (1064), 24 states have internal predecessors, (1064), 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 13:02:44,660 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:44,660 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:44,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:44,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:44,862 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:44,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:44,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1161846484, now seen corresponding path program 2 times [2025-02-06 13:02:44,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:44,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794858208] [2025-02-06 13:02:44,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:44,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:44,870 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:02:44,876 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:02:44,877 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:44,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:02:45,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:45,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794858208] [2025-02-06 13:02:45,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794858208] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:45,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531043295] [2025-02-06 13:02:45,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:45,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:45,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:45,110 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:45,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 13:02:45,197 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 13:02:45,229 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 13:02:45,229 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:45,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:45,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:02:45,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:02:45,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:45,430 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 13:02:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:02:45,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531043295] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:45,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:45,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-02-06 13:02:45,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886591826] [2025-02-06 13:02:45,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:45,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:02:45,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:45,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:02:45,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:02:46,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-02-06 13:02:46,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 117 transitions, 982 flow. Second operand has 20 states, 20 states have (on average 46.9) internal successors, (938), 20 states have internal predecessors, (938), 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 13:02:46,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:46,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-02-06 13:02:46,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:46,673 INFO L124 PetriNetUnfolderBase]: 1295/2759 cut-off events. [2025-02-06 13:02:46,673 INFO L125 PetriNetUnfolderBase]: For 658/658 co-relation queries the response was YES. [2025-02-06 13:02:46,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5955 conditions, 2759 events. 1295/2759 cut-off events. For 658/658 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18614 event pairs, 805 based on Foata normal form. 63/2647 useless extension candidates. Maximal degree in co-relation 3862. Up to 1113 conditions per place. [2025-02-06 13:02:46,682 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 83 selfloop transitions, 44 changer transitions 0/138 dead transitions. [2025-02-06 13:02:46,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 138 transitions, 1288 flow [2025-02-06 13:02:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 13:02:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 13:02:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 639 transitions. [2025-02-06 13:02:46,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.599437148217636 [2025-02-06 13:02:46,684 INFO L175 Difference]: Start difference. First operand has 134 places, 117 transitions, 982 flow. Second operand 13 states and 639 transitions. [2025-02-06 13:02:46,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 138 transitions, 1288 flow [2025-02-06 13:02:46,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 138 transitions, 1265 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 13:02:46,691 INFO L231 Difference]: Finished difference. Result has 136 places, 115 transitions, 1035 flow [2025-02-06 13:02:46,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1035, PETRI_PLACES=136, PETRI_TRANSITIONS=115} [2025-02-06 13:02:46,693 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 58 predicate places. [2025-02-06 13:02:46,693 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 115 transitions, 1035 flow [2025-02-06 13:02:46,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 46.9) internal successors, (938), 20 states have internal predecessors, (938), 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 13:02:46,694 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:46,694 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:46,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-06 13:02:46,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:46,895 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:46,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1612315122, now seen corresponding path program 1 times [2025-02-06 13:02:46,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:46,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309794134] [2025-02-06 13:02:46,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:46,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:46,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-06 13:02:46,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-06 13:02:46,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:46,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:02:46,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309794134] [2025-02-06 13:02:46,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309794134] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:46,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:46,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:46,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735174593] [2025-02-06 13:02:46,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:46,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:46,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:46,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:46,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:46,935 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 82 [2025-02-06 13:02:46,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 115 transitions, 1035 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 13:02:46,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:46,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 82 [2025-02-06 13:02:46,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:47,327 INFO L124 PetriNetUnfolderBase]: 1982/3760 cut-off events. [2025-02-06 13:02:47,327 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2025-02-06 13:02:47,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8289 conditions, 3760 events. 1982/3760 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 24357 event pairs, 964 based on Foata normal form. 0/3456 useless extension candidates. Maximal degree in co-relation 4166. Up to 2331 conditions per place. [2025-02-06 13:02:47,341 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 117 selfloop transitions, 3 changer transitions 0/128 dead transitions. [2025-02-06 13:02:47,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 128 transitions, 1309 flow [2025-02-06 13:02:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2025-02-06 13:02:47,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7276422764227642 [2025-02-06 13:02:47,342 INFO L175 Difference]: Start difference. First operand has 136 places, 115 transitions, 1035 flow. Second operand 3 states and 179 transitions. [2025-02-06 13:02:47,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 128 transitions, 1309 flow [2025-02-06 13:02:47,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 128 transitions, 1282 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:47,349 INFO L231 Difference]: Finished difference. Result has 135 places, 117 transitions, 1030 flow [2025-02-06 13:02:47,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1030, PETRI_PLACES=135, PETRI_TRANSITIONS=117} [2025-02-06 13:02:47,350 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 57 predicate places. [2025-02-06 13:02:47,350 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 117 transitions, 1030 flow [2025-02-06 13:02:47,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 13:02:47,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:47,351 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:47,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-02-06 13:02:47,351 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:47,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash 727918196, now seen corresponding path program 1 times [2025-02-06 13:02:47,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:47,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141363746] [2025-02-06 13:02:47,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:47,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:47,360 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-06 13:02:47,365 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-06 13:02:47,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:47,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:02:47,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:47,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141363746] [2025-02-06 13:02:47,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141363746] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:47,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:47,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:47,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277820160] [2025-02-06 13:02:47,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:47,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:47,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:47,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:47,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:47,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 82 [2025-02-06 13:02:47,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 117 transitions, 1030 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 13:02:47,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:47,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 82 [2025-02-06 13:02:47,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:47,730 INFO L124 PetriNetUnfolderBase]: 2098/3980 cut-off events. [2025-02-06 13:02:47,730 INFO L125 PetriNetUnfolderBase]: For 1117/1197 co-relation queries the response was YES. [2025-02-06 13:02:47,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9677 conditions, 3980 events. 2098/3980 cut-off events. For 1117/1197 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26361 event pairs, 1118 based on Foata normal form. 80/3794 useless extension candidates. Maximal degree in co-relation 7325. Up to 2537 conditions per place. [2025-02-06 13:02:47,745 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 118 selfloop transitions, 3 changer transitions 0/130 dead transitions. [2025-02-06 13:02:47,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 130 transitions, 1314 flow [2025-02-06 13:02:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2025-02-06 13:02:47,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7235772357723578 [2025-02-06 13:02:47,746 INFO L175 Difference]: Start difference. First operand has 135 places, 117 transitions, 1030 flow. Second operand 3 states and 178 transitions. [2025-02-06 13:02:47,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 130 transitions, 1314 flow [2025-02-06 13:02:47,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 130 transitions, 1306 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:47,761 INFO L231 Difference]: Finished difference. Result has 137 places, 119 transitions, 1046 flow [2025-02-06 13:02:47,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1046, PETRI_PLACES=137, PETRI_TRANSITIONS=119} [2025-02-06 13:02:47,762 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 59 predicate places. [2025-02-06 13:02:47,762 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 119 transitions, 1046 flow [2025-02-06 13:02:47,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 13:02:47,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:47,762 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:47,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2025-02-06 13:02:47,762 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:47,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1773488084, now seen corresponding path program 1 times [2025-02-06 13:02:47,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:47,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187310277] [2025-02-06 13:02:47,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:47,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:47,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-06 13:02:47,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:02:47,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:47,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:02:48,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:48,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187310277] [2025-02-06 13:02:48,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187310277] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:48,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:48,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:02:48,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739059792] [2025-02-06 13:02:48,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:48,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:02:48,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:48,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:02:48,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:02:48,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:02:48,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 119 transitions, 1046 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:02:48,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:48,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:02:48,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:49,731 INFO L124 PetriNetUnfolderBase]: 4726/9647 cut-off events. [2025-02-06 13:02:49,731 INFO L125 PetriNetUnfolderBase]: For 3381/3713 co-relation queries the response was YES. [2025-02-06 13:02:49,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24108 conditions, 9647 events. 4726/9647 cut-off events. For 3381/3713 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 83354 event pairs, 265 based on Foata normal form. 338/9851 useless extension candidates. Maximal degree in co-relation 17495. Up to 2231 conditions per place. [2025-02-06 13:02:49,768 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 193 selfloop transitions, 6 changer transitions 7/219 dead transitions. [2025-02-06 13:02:49,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 219 transitions, 1818 flow [2025-02-06 13:02:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 572 transitions. [2025-02-06 13:02:49,770 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.697560975609756 [2025-02-06 13:02:49,770 INFO L175 Difference]: Start difference. First operand has 137 places, 119 transitions, 1046 flow. Second operand 10 states and 572 transitions. [2025-02-06 13:02:49,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 219 transitions, 1818 flow [2025-02-06 13:02:49,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 219 transitions, 1800 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:49,840 INFO L231 Difference]: Finished difference. Result has 152 places, 124 transitions, 1093 flow [2025-02-06 13:02:49,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1093, PETRI_PLACES=152, PETRI_TRANSITIONS=124} [2025-02-06 13:02:49,840 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 74 predicate places. [2025-02-06 13:02:49,840 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 124 transitions, 1093 flow [2025-02-06 13:02:49,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:02:49,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:49,841 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:49,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2025-02-06 13:02:49,841 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:49,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1690261926, now seen corresponding path program 2 times [2025-02-06 13:02:49,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:49,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549369256] [2025-02-06 13:02:49,842 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:49,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:49,851 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-06 13:02:49,856 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-02-06 13:02:49,856 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:02:49,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:02:50,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:50,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549369256] [2025-02-06 13:02:50,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549369256] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:50,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:50,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:02:50,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021680891] [2025-02-06 13:02:50,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:50,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:02:50,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:50,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:02:50,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:02:50,730 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:02:50,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 124 transitions, 1093 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:02:50,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:50,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:02:50,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:52,181 INFO L124 PetriNetUnfolderBase]: 4895/10428 cut-off events. [2025-02-06 13:02:52,181 INFO L125 PetriNetUnfolderBase]: For 6814/7182 co-relation queries the response was YES. [2025-02-06 13:02:52,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28114 conditions, 10428 events. 4895/10428 cut-off events. For 6814/7182 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 95014 event pairs, 656 based on Foata normal form. 374/10682 useless extension candidates. Maximal degree in co-relation 27821. Up to 5137 conditions per place. [2025-02-06 13:02:52,261 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 166 selfloop transitions, 8 changer transitions 6/193 dead transitions. [2025-02-06 13:02:52,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 193 transitions, 1744 flow [2025-02-06 13:02:52,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 550 transitions. [2025-02-06 13:02:52,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2025-02-06 13:02:52,263 INFO L175 Difference]: Start difference. First operand has 152 places, 124 transitions, 1093 flow. Second operand 10 states and 550 transitions. [2025-02-06 13:02:52,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 193 transitions, 1744 flow [2025-02-06 13:02:52,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 193 transitions, 1725 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-02-06 13:02:52,379 INFO L231 Difference]: Finished difference. Result has 161 places, 126 transitions, 1125 flow [2025-02-06 13:02:52,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1125, PETRI_PLACES=161, PETRI_TRANSITIONS=126} [2025-02-06 13:02:52,380 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 83 predicate places. [2025-02-06 13:02:52,380 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 126 transitions, 1125 flow [2025-02-06 13:02:52,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:02:52,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:52,381 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:52,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-02-06 13:02:52,381 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:52,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:52,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1900566262, now seen corresponding path program 3 times [2025-02-06 13:02:52,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:52,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542970303] [2025-02-06 13:02:52,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:02:52,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:52,389 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-02-06 13:02:52,393 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-02-06 13:02:52,394 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 13:02:52,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:02:52,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:52,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542970303] [2025-02-06 13:02:52,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542970303] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:52,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:52,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:02:52,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710293255] [2025-02-06 13:02:52,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:52,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:02:52,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:52,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:02:52,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:02:53,210 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:02:53,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 126 transitions, 1125 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:02:53,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:53,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:02:53,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:54,713 INFO L124 PetriNetUnfolderBase]: 5345/11796 cut-off events. [2025-02-06 13:02:54,713 INFO L125 PetriNetUnfolderBase]: For 12182/12628 co-relation queries the response was YES. [2025-02-06 13:02:54,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33447 conditions, 11796 events. 5345/11796 cut-off events. For 12182/12628 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 112839 event pairs, 1043 based on Foata normal form. 452/12062 useless extension candidates. Maximal degree in co-relation 32935. Up to 5760 conditions per place. [2025-02-06 13:02:54,782 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 165 selfloop transitions, 11 changer transitions 7/196 dead transitions. [2025-02-06 13:02:54,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 196 transitions, 1794 flow [2025-02-06 13:02:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 557 transitions. [2025-02-06 13:02:54,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792682926829269 [2025-02-06 13:02:54,784 INFO L175 Difference]: Start difference. First operand has 161 places, 126 transitions, 1125 flow. Second operand 10 states and 557 transitions. [2025-02-06 13:02:54,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 196 transitions, 1794 flow [2025-02-06 13:02:54,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 196 transitions, 1738 flow, removed 11 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:54,892 INFO L231 Difference]: Finished difference. Result has 168 places, 128 transitions, 1156 flow [2025-02-06 13:02:54,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1156, PETRI_PLACES=168, PETRI_TRANSITIONS=128} [2025-02-06 13:02:54,893 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 90 predicate places. [2025-02-06 13:02:54,893 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 128 transitions, 1156 flow [2025-02-06 13:02:54,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:02:54,893 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:54,893 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:54,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-02-06 13:02:54,894 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:54,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1338068944, now seen corresponding path program 4 times [2025-02-06 13:02:54,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:54,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705011878] [2025-02-06 13:02:54,895 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:02:54,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:54,903 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-02-06 13:02:54,907 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-02-06 13:02:54,907 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:02:54,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:02:55,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:55,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705011878] [2025-02-06 13:02:55,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705011878] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:55,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:55,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:02:55,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036553525] [2025-02-06 13:02:55,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:55,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:02:55,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:55,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:02:55,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:02:55,658 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:02:55,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 128 transitions, 1156 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:02:55,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:55,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:02:55,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:57,125 INFO L124 PetriNetUnfolderBase]: 5531/12498 cut-off events. [2025-02-06 13:02:57,125 INFO L125 PetriNetUnfolderBase]: For 16962/17396 co-relation queries the response was YES. [2025-02-06 13:02:57,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36525 conditions, 12498 events. 5531/12498 cut-off events. For 16962/17396 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 122537 event pairs, 1044 based on Foata normal form. 440/12769 useless extension candidates. Maximal degree in co-relation 35938. Up to 7225 conditions per place. [2025-02-06 13:02:57,199 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 171 selfloop transitions, 11 changer transitions 6/201 dead transitions. [2025-02-06 13:02:57,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 201 transitions, 1910 flow [2025-02-06 13:02:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 556 transitions. [2025-02-06 13:02:57,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2025-02-06 13:02:57,200 INFO L175 Difference]: Start difference. First operand has 168 places, 128 transitions, 1156 flow. Second operand 10 states and 556 transitions. [2025-02-06 13:02:57,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 201 transitions, 1910 flow [2025-02-06 13:02:57,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 201 transitions, 1845 flow, removed 13 selfloop flow, removed 5 redundant places. [2025-02-06 13:02:57,331 INFO L231 Difference]: Finished difference. Result has 175 places, 131 transitions, 1191 flow [2025-02-06 13:02:57,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1191, PETRI_PLACES=175, PETRI_TRANSITIONS=131} [2025-02-06 13:02:57,332 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 97 predicate places. [2025-02-06 13:02:57,332 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 131 transitions, 1191 flow [2025-02-06 13:02:57,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:02:57,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:57,332 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:57,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-02-06 13:02:57,333 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:02:57,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash -56907382, now seen corresponding path program 5 times [2025-02-06 13:02:57,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:57,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074080729] [2025-02-06 13:02:57,333 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:02:57,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:57,340 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-02-06 13:02:57,359 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:02:57,359 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:02:57,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:02:57,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:57,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074080729] [2025-02-06 13:02:57,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074080729] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:57,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:57,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:02:57,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97195401] [2025-02-06 13:02:57,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:57,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:02:57,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:57,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:02:57,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:02:58,301 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:02:58,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 131 transitions, 1191 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:02:58,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:58,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:02:58,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:59,895 INFO L124 PetriNetUnfolderBase]: 5887/13442 cut-off events. [2025-02-06 13:02:59,895 INFO L125 PetriNetUnfolderBase]: For 23043/23477 co-relation queries the response was YES. [2025-02-06 13:02:59,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40752 conditions, 13442 events. 5887/13442 cut-off events. For 23043/23477 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 134389 event pairs, 1151 based on Foata normal form. 440/13693 useless extension candidates. Maximal degree in co-relation 40090. Up to 8100 conditions per place. [2025-02-06 13:02:59,971 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 171 selfloop transitions, 14 changer transitions 7/205 dead transitions. [2025-02-06 13:02:59,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 205 transitions, 1952 flow [2025-02-06 13:02:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:02:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:02:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2025-02-06 13:02:59,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6817073170731708 [2025-02-06 13:02:59,972 INFO L175 Difference]: Start difference. First operand has 175 places, 131 transitions, 1191 flow. Second operand 10 states and 559 transitions. [2025-02-06 13:02:59,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 205 transitions, 1952 flow [2025-02-06 13:03:00,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 205 transitions, 1877 flow, removed 8 selfloop flow, removed 6 redundant places. [2025-02-06 13:03:00,133 INFO L231 Difference]: Finished difference. Result has 181 places, 134 transitions, 1231 flow [2025-02-06 13:03:00,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1231, PETRI_PLACES=181, PETRI_TRANSITIONS=134} [2025-02-06 13:03:00,134 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 103 predicate places. [2025-02-06 13:03:00,134 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 134 transitions, 1231 flow [2025-02-06 13:03:00,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:00,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:00,134 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:00,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-02-06 13:03:00,134 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:03:00,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:00,135 INFO L85 PathProgramCache]: Analyzing trace with hash -209828378, now seen corresponding path program 6 times [2025-02-06 13:03:00,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:00,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614098078] [2025-02-06 13:03:00,135 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:03:00,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:00,144 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-02-06 13:03:00,147 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-02-06 13:03:00,149 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-02-06 13:03:00,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:03:00,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:00,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614098078] [2025-02-06 13:03:00,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614098078] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:03:00,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:03:00,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:03:00,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951243101] [2025-02-06 13:03:00,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:03:00,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:03:00,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:00,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:03:00,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:03:00,664 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:03:00,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 134 transitions, 1231 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:00,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:00,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:03:00,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:02,397 INFO L124 PetriNetUnfolderBase]: 6922/15684 cut-off events. [2025-02-06 13:03:02,398 INFO L125 PetriNetUnfolderBase]: For 37299/37885 co-relation queries the response was YES. [2025-02-06 13:03:02,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49204 conditions, 15684 events. 6922/15684 cut-off events. For 37299/37885 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 160253 event pairs, 1502 based on Foata normal form. 592/16025 useless extension candidates. Maximal degree in co-relation 48419. Up to 8643 conditions per place. [2025-02-06 13:03:02,514 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 182 selfloop transitions, 14 changer transitions 6/215 dead transitions. [2025-02-06 13:03:02,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 215 transitions, 2086 flow [2025-02-06 13:03:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:03:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:03:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2025-02-06 13:03:02,515 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6841463414634147 [2025-02-06 13:03:02,515 INFO L175 Difference]: Start difference. First operand has 181 places, 134 transitions, 1231 flow. Second operand 10 states and 561 transitions. [2025-02-06 13:03:02,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 215 transitions, 2086 flow [2025-02-06 13:03:02,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 215 transitions, 2000 flow, removed 11 selfloop flow, removed 6 redundant places. [2025-02-06 13:03:02,729 INFO L231 Difference]: Finished difference. Result has 189 places, 138 transitions, 1288 flow [2025-02-06 13:03:02,729 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1288, PETRI_PLACES=189, PETRI_TRANSITIONS=138} [2025-02-06 13:03:02,729 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 111 predicate places. [2025-02-06 13:03:02,729 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 138 transitions, 1288 flow [2025-02-06 13:03:02,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:02,730 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:02,730 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:02,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-02-06 13:03:02,730 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:03:02,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:02,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2106528016, now seen corresponding path program 7 times [2025-02-06 13:03:02,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:02,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009096490] [2025-02-06 13:03:02,731 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:03:02,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:02,738 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-06 13:03:02,746 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:03:02,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:03:02,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:03:03,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:03,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009096490] [2025-02-06 13:03:03,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009096490] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:03:03,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:03:03,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:03:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019496156] [2025-02-06 13:03:03,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:03:03,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:03:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:03,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:03:03,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:03:03,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:03:03,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 138 transitions, 1288 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:03,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:03,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:03:03,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:05,334 INFO L124 PetriNetUnfolderBase]: 7045/16059 cut-off events. [2025-02-06 13:03:05,334 INFO L125 PetriNetUnfolderBase]: For 41302/41845 co-relation queries the response was YES. [2025-02-06 13:03:05,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50991 conditions, 16059 events. 7045/16059 cut-off events. For 41302/41845 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 165627 event pairs, 1048 based on Foata normal form. 549/16375 useless extension candidates. Maximal degree in co-relation 50177. Up to 8859 conditions per place. [2025-02-06 13:03:05,468 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 186 selfloop transitions, 15 changer transitions 7/221 dead transitions. [2025-02-06 13:03:05,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 221 transitions, 2163 flow [2025-02-06 13:03:05,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:03:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:03:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 563 transitions. [2025-02-06 13:03:05,469 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6865853658536586 [2025-02-06 13:03:05,469 INFO L175 Difference]: Start difference. First operand has 189 places, 138 transitions, 1288 flow. Second operand 10 states and 563 transitions. [2025-02-06 13:03:05,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 221 transitions, 2163 flow [2025-02-06 13:03:05,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 221 transitions, 2114 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-02-06 13:03:05,721 INFO L231 Difference]: Finished difference. Result has 199 places, 142 transitions, 1363 flow [2025-02-06 13:03:05,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1363, PETRI_PLACES=199, PETRI_TRANSITIONS=142} [2025-02-06 13:03:05,722 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 121 predicate places. [2025-02-06 13:03:05,722 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 142 transitions, 1363 flow [2025-02-06 13:03:05,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:05,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:05,722 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:05,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-02-06 13:03:05,722 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:03:05,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:05,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1075750852, now seen corresponding path program 8 times [2025-02-06 13:03:05,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:05,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364263304] [2025-02-06 13:03:05,723 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:03:05,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:05,730 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-06 13:03:05,733 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-02-06 13:03:05,733 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:03:05,733 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:03:06,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:06,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364263304] [2025-02-06 13:03:06,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364263304] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:03:06,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:03:06,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:03:06,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352779154] [2025-02-06 13:03:06,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:03:06,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:03:06,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:06,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:03:06,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:03:06,347 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:03:06,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 142 transitions, 1363 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:06,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:06,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:03:06,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:09,069 INFO L124 PetriNetUnfolderBase]: 7018/16012 cut-off events. [2025-02-06 13:03:09,070 INFO L125 PetriNetUnfolderBase]: For 56078/56660 co-relation queries the response was YES. [2025-02-06 13:03:09,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53055 conditions, 16012 events. 7018/16012 cut-off events. For 56078/56660 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 164078 event pairs, 2173 based on Foata normal form. 588/16229 useless extension candidates. Maximal degree in co-relation 52212. Up to 7373 conditions per place. [2025-02-06 13:03:09,168 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 196 selfloop transitions, 13 changer transitions 6/228 dead transitions. [2025-02-06 13:03:09,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 228 transitions, 2281 flow [2025-02-06 13:03:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:03:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:03:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 568 transitions. [2025-02-06 13:03:09,169 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6926829268292682 [2025-02-06 13:03:09,170 INFO L175 Difference]: Start difference. First operand has 199 places, 142 transitions, 1363 flow. Second operand 10 states and 568 transitions. [2025-02-06 13:03:09,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 228 transitions, 2281 flow [2025-02-06 13:03:09,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 228 transitions, 2232 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-02-06 13:03:09,448 INFO L231 Difference]: Finished difference. Result has 210 places, 147 transitions, 1451 flow [2025-02-06 13:03:09,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1451, PETRI_PLACES=210, PETRI_TRANSITIONS=147} [2025-02-06 13:03:09,449 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 132 predicate places. [2025-02-06 13:03:09,449 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 147 transitions, 1451 flow [2025-02-06 13:03:09,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:09,449 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:09,450 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:09,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2025-02-06 13:03:09,450 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:03:09,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1074049306, now seen corresponding path program 9 times [2025-02-06 13:03:09,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:09,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075958635] [2025-02-06 13:03:09,451 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:03:09,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:09,457 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-02-06 13:03:09,460 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-02-06 13:03:09,460 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 13:03:09,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:03:09,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:09,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075958635] [2025-02-06 13:03:09,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075958635] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:03:09,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:03:09,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:03:09,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203007637] [2025-02-06 13:03:09,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:03:09,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:03:09,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:09,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:03:09,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:03:09,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:03:09,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 147 transitions, 1451 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:09,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:09,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:03:09,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:12,124 INFO L124 PetriNetUnfolderBase]: 7021/16005 cut-off events. [2025-02-06 13:03:12,125 INFO L125 PetriNetUnfolderBase]: For 64360/64941 co-relation queries the response was YES. [2025-02-06 13:03:12,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54717 conditions, 16005 events. 7021/16005 cut-off events. For 64360/64941 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 164213 event pairs, 1560 based on Foata normal form. 587/16349 useless extension candidates. Maximal degree in co-relation 53868. Up to 8955 conditions per place. [2025-02-06 13:03:12,224 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 192 selfloop transitions, 20 changer transitions 6/231 dead transitions. [2025-02-06 13:03:12,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 231 transitions, 2371 flow [2025-02-06 13:03:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:03:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:03:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2025-02-06 13:03:12,226 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6817073170731708 [2025-02-06 13:03:12,226 INFO L175 Difference]: Start difference. First operand has 210 places, 147 transitions, 1451 flow. Second operand 10 states and 559 transitions. [2025-02-06 13:03:12,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 231 transitions, 2371 flow [2025-02-06 13:03:12,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 231 transitions, 2310 flow, removed 28 selfloop flow, removed 3 redundant places. [2025-02-06 13:03:12,584 INFO L231 Difference]: Finished difference. Result has 220 places, 150 transitions, 1523 flow [2025-02-06 13:03:12,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1523, PETRI_PLACES=220, PETRI_TRANSITIONS=150} [2025-02-06 13:03:12,585 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 142 predicate places. [2025-02-06 13:03:12,585 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 150 transitions, 1523 flow [2025-02-06 13:03:12,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:12,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:12,586 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:12,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-02-06 13:03:12,586 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:03:12,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash 373600104, now seen corresponding path program 10 times [2025-02-06 13:03:12,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:12,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83862981] [2025-02-06 13:03:12,587 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:03:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:12,596 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-02-06 13:03:12,600 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-02-06 13:03:12,600 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:03:12,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:03:12,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:12,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83862981] [2025-02-06 13:03:12,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83862981] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:03:12,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:03:12,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:03:12,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225904270] [2025-02-06 13:03:12,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:03:12,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:03:12,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:12,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:03:12,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:03:13,222 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:03:13,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 150 transitions, 1523 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:13,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:13,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:03:13,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:15,733 INFO L124 PetriNetUnfolderBase]: 7183/16407 cut-off events. [2025-02-06 13:03:15,733 INFO L125 PetriNetUnfolderBase]: For 69314/69911 co-relation queries the response was YES. [2025-02-06 13:03:15,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57068 conditions, 16407 events. 7183/16407 cut-off events. For 69314/69911 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 169303 event pairs, 1759 based on Foata normal form. 603/16711 useless extension candidates. Maximal degree in co-relation 56167. Up to 8955 conditions per place. [2025-02-06 13:03:15,844 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 189 selfloop transitions, 18 changer transitions 7/227 dead transitions. [2025-02-06 13:03:15,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 227 transitions, 2431 flow [2025-02-06 13:03:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:03:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:03:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 560 transitions. [2025-02-06 13:03:15,845 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2025-02-06 13:03:15,845 INFO L175 Difference]: Start difference. First operand has 220 places, 150 transitions, 1523 flow. Second operand 10 states and 560 transitions. [2025-02-06 13:03:15,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 227 transitions, 2431 flow [2025-02-06 13:03:16,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 227 transitions, 2322 flow, removed 42 selfloop flow, removed 5 redundant places. [2025-02-06 13:03:16,280 INFO L231 Difference]: Finished difference. Result has 226 places, 152 transitions, 1544 flow [2025-02-06 13:03:16,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1544, PETRI_PLACES=226, PETRI_TRANSITIONS=152} [2025-02-06 13:03:16,280 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 148 predicate places. [2025-02-06 13:03:16,281 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 152 transitions, 1544 flow [2025-02-06 13:03:16,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:16,281 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:16,281 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:16,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2025-02-06 13:03:16,281 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:03:16,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:16,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1836645934, now seen corresponding path program 11 times [2025-02-06 13:03:16,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:16,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362700018] [2025-02-06 13:03:16,282 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:03:16,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:16,292 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-02-06 13:03:16,315 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:03:16,315 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:03:16,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:03:16,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:16,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362700018] [2025-02-06 13:03:16,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362700018] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:03:16,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:03:16,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:03:16,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789498035] [2025-02-06 13:03:16,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:03:16,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:03:16,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:16,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:03:16,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:03:17,299 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:03:17,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 152 transitions, 1544 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:17,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:17,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:03:17,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:19,616 INFO L124 PetriNetUnfolderBase]: 7177/16413 cut-off events. [2025-02-06 13:03:19,617 INFO L125 PetriNetUnfolderBase]: For 60322/60903 co-relation queries the response was YES. [2025-02-06 13:03:19,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55936 conditions, 16413 events. 7177/16413 cut-off events. For 60322/60903 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 169565 event pairs, 1614 based on Foata normal form. 587/16757 useless extension candidates. Maximal degree in co-relation 55033. Up to 8955 conditions per place. [2025-02-06 13:03:19,765 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 190 selfloop transitions, 21 changer transitions 7/231 dead transitions. [2025-02-06 13:03:19,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 231 transitions, 2414 flow [2025-02-06 13:03:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:03:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:03:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2025-02-06 13:03:19,766 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6817073170731708 [2025-02-06 13:03:19,767 INFO L175 Difference]: Start difference. First operand has 226 places, 152 transitions, 1544 flow. Second operand 10 states and 559 transitions. [2025-02-06 13:03:19,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 231 transitions, 2414 flow [2025-02-06 13:03:20,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 231 transitions, 2357 flow, removed 10 selfloop flow, removed 7 redundant places. [2025-02-06 13:03:20,133 INFO L231 Difference]: Finished difference. Result has 231 places, 154 transitions, 1586 flow [2025-02-06 13:03:20,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1586, PETRI_PLACES=231, PETRI_TRANSITIONS=154} [2025-02-06 13:03:20,133 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 153 predicate places. [2025-02-06 13:03:20,134 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 154 transitions, 1586 flow [2025-02-06 13:03:20,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:20,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:20,134 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:20,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2025-02-06 13:03:20,134 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:03:20,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2121566182, now seen corresponding path program 12 times [2025-02-06 13:03:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:20,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979179665] [2025-02-06 13:03:20,135 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:03:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:20,142 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-02-06 13:03:20,144 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-02-06 13:03:20,145 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-02-06 13:03:20,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:03:20,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979179665] [2025-02-06 13:03:20,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979179665] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:03:20,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:03:20,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:03:20,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159098860] [2025-02-06 13:03:20,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:03:20,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:03:20,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:20,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:03:20,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:03:20,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:03:20,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 154 transitions, 1586 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:20,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:20,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:03:20,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:22,918 INFO L124 PetriNetUnfolderBase]: 7171/16413 cut-off events. [2025-02-06 13:03:22,918 INFO L125 PetriNetUnfolderBase]: For 62994/63557 co-relation queries the response was YES. [2025-02-06 13:03:22,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56332 conditions, 16413 events. 7171/16413 cut-off events. For 62994/63557 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 169633 event pairs, 1698 based on Foata normal form. 569/16715 useless extension candidates. Maximal degree in co-relation 55426. Up to 8955 conditions per place. [2025-02-06 13:03:23,024 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 184 selfloop transitions, 23 changer transitions 6/226 dead transitions. [2025-02-06 13:03:23,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 226 transitions, 2415 flow [2025-02-06 13:03:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:03:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:03:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 553 transitions. [2025-02-06 13:03:23,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6743902439024391 [2025-02-06 13:03:23,025 INFO L175 Difference]: Start difference. First operand has 231 places, 154 transitions, 1586 flow. Second operand 10 states and 553 transitions. [2025-02-06 13:03:23,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 226 transitions, 2415 flow [2025-02-06 13:03:23,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 226 transitions, 2374 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-02-06 13:03:23,408 INFO L231 Difference]: Finished difference. Result has 236 places, 156 transitions, 1641 flow [2025-02-06 13:03:23,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1641, PETRI_PLACES=236, PETRI_TRANSITIONS=156} [2025-02-06 13:03:23,408 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 158 predicate places. [2025-02-06 13:03:23,408 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 156 transitions, 1641 flow [2025-02-06 13:03:23,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:23,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:23,409 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:23,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2025-02-06 13:03:23,409 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:03:23,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:23,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2124396124, now seen corresponding path program 13 times [2025-02-06 13:03:23,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:23,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521072124] [2025-02-06 13:03:23,410 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:03:23,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:23,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-06 13:03:23,429 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:03:23,429 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:03:23,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:03:23,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:23,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521072124] [2025-02-06 13:03:23,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521072124] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:03:23,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:03:23,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:03:23,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439790796] [2025-02-06 13:03:23,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:03:23,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:03:23,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:23,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:03:23,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:03:24,128 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:03:24,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 156 transitions, 1641 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:24,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:24,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:03:24,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:03:26,704 INFO L124 PetriNetUnfolderBase]: 7165/16443 cut-off events. [2025-02-06 13:03:26,704 INFO L125 PetriNetUnfolderBase]: For 65474/66025 co-relation queries the response was YES. [2025-02-06 13:03:26,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56937 conditions, 16443 events. 7165/16443 cut-off events. For 65474/66025 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 170412 event pairs, 1524 based on Foata normal form. 557/16757 useless extension candidates. Maximal degree in co-relation 56029. Up to 8955 conditions per place. [2025-02-06 13:03:26,803 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 180 selfloop transitions, 25 changer transitions 6/224 dead transitions. [2025-02-06 13:03:26,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 224 transitions, 2444 flow [2025-02-06 13:03:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:03:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:03:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 552 transitions. [2025-02-06 13:03:26,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6731707317073171 [2025-02-06 13:03:26,804 INFO L175 Difference]: Start difference. First operand has 236 places, 156 transitions, 1641 flow. Second operand 10 states and 552 transitions. [2025-02-06 13:03:26,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 224 transitions, 2444 flow [2025-02-06 13:03:27,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 224 transitions, 2386 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-06 13:03:27,335 INFO L231 Difference]: Finished difference. Result has 238 places, 158 transitions, 1694 flow [2025-02-06 13:03:27,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1694, PETRI_PLACES=238, PETRI_TRANSITIONS=158} [2025-02-06 13:03:27,336 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 160 predicate places. [2025-02-06 13:03:27,336 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 158 transitions, 1694 flow [2025-02-06 13:03:27,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:27,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:03:27,336 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:03:27,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2025-02-06 13:03:27,337 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 13:03:27,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:03:27,337 INFO L85 PathProgramCache]: Analyzing trace with hash 816664944, now seen corresponding path program 14 times [2025-02-06 13:03:27,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:03:27,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672425778] [2025-02-06 13:03:27,337 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:03:27,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:03:27,348 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-06 13:03:27,351 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-02-06 13:03:27,351 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:03:27,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:03:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:03:27,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:03:27,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672425778] [2025-02-06 13:03:27,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672425778] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:03:27,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:03:27,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-06 13:03:27,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645566398] [2025-02-06 13:03:27,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:03:27,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:03:27,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:03:27,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:03:27,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:03:27,853 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-02-06 13:03:27,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 158 transitions, 1694 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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 13:03:27,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:03:27,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-02-06 13:03:27,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand