./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.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 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:06:43,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:06:43,605 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 01:06:43,608 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:06:43,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:06:43,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:06:43,622 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:06:43,622 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:06:43,623 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:06:43,623 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:06:43,623 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:06:43,623 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:06:43,623 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:06:43,623 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:06:43,623 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:06:43,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:06:43,624 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 01:06:43,625 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:06:43,625 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:06:43,625 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:06:43,625 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:06:43,625 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:06:43,625 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:06:43,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:06:43,625 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:06:43,625 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:06:43,625 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:06:43,625 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:06:43,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:06:43,626 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:06:43,626 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:06:43,626 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:06:43,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:06:43,626 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:06:43,626 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:06:43,626 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:06:43,626 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:06:43,626 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 -> 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 [2025-01-10 01:06:43,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:06:43,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:06:43,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:06:43,833 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:06:43,833 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:06:43,833 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-01-10 01:06:44,920 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/940de108f/79c00fb06eef4f49b88e98522449e1f8/FLAGc4c32bbd5 [2025-01-10 01:06:45,141 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:06:45,141 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-01-10 01:06:45,147 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/940de108f/79c00fb06eef4f49b88e98522449e1f8/FLAGc4c32bbd5 [2025-01-10 01:06:45,495 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/940de108f/79c00fb06eef4f49b88e98522449e1f8 [2025-01-10 01:06:45,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:06:45,499 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:06:45,500 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:06:45,500 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:06:45,503 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:06:45,504 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474ef4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45, skipping insertion in model container [2025-01-10 01:06:45,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,514 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:06:45,620 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-10 01:06:45,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:06:45,630 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:06:45,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:06:45,653 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:06:45,653 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45 WrapperNode [2025-01-10 01:06:45,653 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:06:45,654 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:06:45,654 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:06:45,654 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:06:45,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,662 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,674 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 127 [2025-01-10 01:06:45,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:06:45,675 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:06:45,675 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:06:45,675 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:06:45,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,681 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,682 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,698 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-10 01:06:45,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,706 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,707 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,713 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,714 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,714 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,716 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:06:45,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:06:45,718 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:06:45,718 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:06:45,719 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (1/1) ... [2025-01-10 01:06:45,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:06:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:45,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-10 01:06:45,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-10 01:06:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:06:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:06:45,766 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:06:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:06:45,767 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:06:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:06:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 01:06:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-10 01:06:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-10 01:06:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:06:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:06:45,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:06:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 01:06:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 01:06:45,770 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 01:06:45,848 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:06:45,850 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:06:46,111 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:06:46,111 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:06:46,286 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:06:46,287 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 01:06:46,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:06:46 BoogieIcfgContainer [2025-01-10 01:06:46,287 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:06:46,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:06:46,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:06:46,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:06:46,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:06:45" (1/3) ... [2025-01-10 01:06:46,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9d899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:06:46, skipping insertion in model container [2025-01-10 01:06:46,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:06:45" (2/3) ... [2025-01-10 01:06:46,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9d899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:06:46, skipping insertion in model container [2025-01-10 01:06:46,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:06:46" (3/3) ... [2025-01-10 01:06:46,297 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2025-01-10 01:06:46,308 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:06:46,309 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-01-10 01:06:46,309 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:06:46,356 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-10 01:06:46,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2025-01-10 01:06:46,403 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2025-01-10 01:06:46,405 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 01:06:46,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2025-01-10 01:06:46,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2025-01-10 01:06:46,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2025-01-10 01:06:46,419 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:06:46,429 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;@61b00b92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:06:46,429 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-01-10 01:06:46,431 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:06:46,431 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-01-10 01:06:46,431 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:06:46,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:46,432 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:06:46,432 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:46,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:46,436 INFO L85 PathProgramCache]: Analyzing trace with hash 431230, now seen corresponding path program 1 times [2025-01-10 01:06:46,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:46,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309220241] [2025-01-10 01:06:46,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:46,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:46,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:06:46,508 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:06:46,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:46,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:46,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:46,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309220241] [2025-01-10 01:06:46,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309220241] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:46,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:46,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:06:46,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142906] [2025-01-10 01:06:46,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:46,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:06:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:46,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:06:46,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:06:46,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:46,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:46,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:46,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:46,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:46,756 INFO L124 PetriNetUnfolderBase]: 62/153 cut-off events. [2025-01-10 01:06:46,756 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-01-10 01:06:46,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 153 events. 62/153 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 604 event pairs, 42 based on Foata normal form. 1/140 useless extension candidates. Maximal degree in co-relation 240. Up to 109 conditions per place. [2025-01-10 01:06:46,760 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2025-01-10 01:06:46,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 108 flow [2025-01-10 01:06:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:06:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:06:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2025-01-10 01:06:46,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-01-10 01:06:46,775 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 60 transitions. [2025-01-10 01:06:46,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 108 flow [2025-01-10 01:06:46,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:06:46,781 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2025-01-10 01:06:46,783 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2025-01-10 01:06:46,787 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-01-10 01:06:46,788 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2025-01-10 01:06:46,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:46,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:46,789 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:06:46,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:06:46,789 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:46,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:46,790 INFO L85 PathProgramCache]: Analyzing trace with hash 431231, now seen corresponding path program 1 times [2025-01-10 01:06:46,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:46,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193894811] [2025-01-10 01:06:46,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:46,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:46,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:06:46,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:06:46,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:46,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:47,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:47,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193894811] [2025-01-10 01:06:47,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193894811] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:47,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:47,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:06:47,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635379432] [2025-01-10 01:06:47,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:47,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:06:47,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:47,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:06:47,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:06:47,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:47,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:47,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:47,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:47,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:47,172 INFO L124 PetriNetUnfolderBase]: 63/156 cut-off events. [2025-01-10 01:06:47,172 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:06:47,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 156 events. 63/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 616 event pairs, 42 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 260. Up to 114 conditions per place. [2025-01-10 01:06:47,174 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2025-01-10 01:06:47,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 120 flow [2025-01-10 01:06:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:06:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:06:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2025-01-10 01:06:47,176 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-01-10 01:06:47,177 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 76 transitions. [2025-01-10 01:06:47,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 120 flow [2025-01-10 01:06:47,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:06:47,179 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 89 flow [2025-01-10 01:06:47,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2025-01-10 01:06:47,179 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-01-10 01:06:47,179 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 89 flow [2025-01-10 01:06:47,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:47,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:47,180 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-01-10 01:06:47,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:06:47,180 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:47,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash 414426187, now seen corresponding path program 1 times [2025-01-10 01:06:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:47,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466950015] [2025-01-10 01:06:47,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:47,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:47,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:06:47,200 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:06:47,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:47,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:47,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:47,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466950015] [2025-01-10 01:06:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466950015] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:47,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119290943] [2025-01-10 01:06:47,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:47,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:47,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:47,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:06:47,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-10 01:06:47,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:06:47,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:06:47,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:47,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:47,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:06:47,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:47,524 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 [2025-01-10 01:06:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:47,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:47,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119290943] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:47,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:47,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-01-10 01:06:47,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989740365] [2025-01-10 01:06:47,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:47,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:06:47,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:47,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:06:47,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:06:47,823 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:47,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 89 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:47,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:47,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:47,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:48,006 INFO L124 PetriNetUnfolderBase]: 64/158 cut-off events. [2025-01-10 01:06:48,006 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:06:48,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 158 events. 64/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 627 event pairs, 42 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 267. Up to 111 conditions per place. [2025-01-10 01:06:48,008 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 15 selfloop transitions, 10 changer transitions 0/34 dead transitions. [2025-01-10 01:06:48,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 147 flow [2025-01-10 01:06:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:06:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:06:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2025-01-10 01:06:48,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2025-01-10 01:06:48,009 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 89 flow. Second operand 8 states and 131 transitions. [2025-01-10 01:06:48,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 147 flow [2025-01-10 01:06:48,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:06:48,010 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 114 flow [2025-01-10 01:06:48,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=114, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2025-01-10 01:06:48,011 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2025-01-10 01:06:48,011 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 114 flow [2025-01-10 01:06:48,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:48,011 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:48,011 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 01:06:48,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-10 01:06:48,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:48,216 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:48,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:48,217 INFO L85 PathProgramCache]: Analyzing trace with hash -35696006, now seen corresponding path program 1 times [2025-01-10 01:06:48,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:48,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119064038] [2025-01-10 01:06:48,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:48,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:48,221 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:06:48,227 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:06:48,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:48,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:48,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:48,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119064038] [2025-01-10 01:06:48,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119064038] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:48,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:48,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:06:48,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137942973] [2025-01-10 01:06:48,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:48,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:06:48,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:48,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:06:48,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:06:48,285 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-01-10 01:06:48,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:48,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:48,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-01-10 01:06:48,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:48,331 INFO L124 PetriNetUnfolderBase]: 64/148 cut-off events. [2025-01-10 01:06:48,331 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:06:48,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 148 events. 64/148 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 533 event pairs, 42 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 258. Up to 110 conditions per place. [2025-01-10 01:06:48,332 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 21 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2025-01-10 01:06:48,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 160 flow [2025-01-10 01:06:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:06:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:06:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2025-01-10 01:06:48,333 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-01-10 01:06:48,333 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 114 flow. Second operand 4 states and 65 transitions. [2025-01-10 01:06:48,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 160 flow [2025-01-10 01:06:48,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 118 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-01-10 01:06:48,334 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 76 flow [2025-01-10 01:06:48,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2025-01-10 01:06:48,335 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2025-01-10 01:06:48,335 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 76 flow [2025-01-10 01:06:48,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:48,335 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:48,335 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 01:06:48,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-10 01:06:48,336 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:48,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash -35696005, now seen corresponding path program 1 times [2025-01-10 01:06:48,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:48,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700130530] [2025-01-10 01:06:48,336 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:48,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:48,340 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:06:48,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:06:48,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:48,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:48,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:48,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700130530] [2025-01-10 01:06:48,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700130530] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:48,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:48,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:06:48,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881232777] [2025-01-10 01:06:48,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:48,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:06:48,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:48,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:06:48,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:06:48,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:48,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:48,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:48,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:48,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:48,488 INFO L124 PetriNetUnfolderBase]: 114/263 cut-off events. [2025-01-10 01:06:48,488 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:06:48,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 263 events. 114/263 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1129 event pairs, 72 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 304. Up to 139 conditions per place. [2025-01-10 01:06:48,490 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 41 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2025-01-10 01:06:48,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 213 flow [2025-01-10 01:06:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:06:48,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:06:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2025-01-10 01:06:48,491 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2025-01-10 01:06:48,491 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 76 flow. Second operand 5 states and 109 transitions. [2025-01-10 01:06:48,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 213 flow [2025-01-10 01:06:48,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:06:48,492 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 96 flow [2025-01-10 01:06:48,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2025-01-10 01:06:48,492 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2025-01-10 01:06:48,492 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 96 flow [2025-01-10 01:06:48,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:48,493 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:48,493 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:48,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-10 01:06:48,497 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:48,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash 45289222, now seen corresponding path program 1 times [2025-01-10 01:06:48,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:48,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4296161] [2025-01-10 01:06:48,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:48,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:48,502 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:06:48,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:06:48,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:48,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:48,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:48,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4296161] [2025-01-10 01:06:48,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4296161] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:48,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:48,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:06:48,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84631869] [2025-01-10 01:06:48,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:48,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:06:48,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:48,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:06:48,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:06:48,576 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:48,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:48,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:48,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:48,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:48,651 INFO L124 PetriNetUnfolderBase]: 98/211 cut-off events. [2025-01-10 01:06:48,652 INFO L125 PetriNetUnfolderBase]: For 71/81 co-relation queries the response was YES. [2025-01-10 01:06:48,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 211 events. 98/211 cut-off events. For 71/81 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 752 event pairs, 67 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 322. Up to 137 conditions per place. [2025-01-10 01:06:48,653 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 36 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2025-01-10 01:06:48,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 217 flow [2025-01-10 01:06:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:06:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:06:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2025-01-10 01:06:48,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2025-01-10 01:06:48,656 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 96 flow. Second operand 5 states and 104 transitions. [2025-01-10 01:06:48,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 217 flow [2025-01-10 01:06:48,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:06:48,658 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 116 flow [2025-01-10 01:06:48,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2025-01-10 01:06:48,659 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2025-01-10 01:06:48,659 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 116 flow [2025-01-10 01:06:48,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:48,660 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:48,660 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:48,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-10 01:06:48,660 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:48,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1858035921, now seen corresponding path program 1 times [2025-01-10 01:06:48,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:48,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974295978] [2025-01-10 01:06:48,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:48,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:48,665 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:06:48,670 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:06:48,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:48,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:48,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:48,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974295978] [2025-01-10 01:06:48,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974295978] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:48,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382223701] [2025-01-10 01:06:48,776 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:48,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:48,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:48,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:06:48,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-10 01:06:48,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:06:48,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:06:48,825 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:48,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:48,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:06:48,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:48,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:48,939 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 [2025-01-10 01:06:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:48,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382223701] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:48,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:48,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-01-10 01:06:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235006224] [2025-01-10 01:06:48,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:48,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:06:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:48,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:06:48,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:06:49,033 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:49,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 116 flow. Second operand has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:49,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:49,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:49,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:49,266 INFO L124 PetriNetUnfolderBase]: 137/307 cut-off events. [2025-01-10 01:06:49,266 INFO L125 PetriNetUnfolderBase]: For 103/116 co-relation queries the response was YES. [2025-01-10 01:06:49,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 307 events. 137/307 cut-off events. For 103/116 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1308 event pairs, 64 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 535. Up to 119 conditions per place. [2025-01-10 01:06:49,268 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 44 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2025-01-10 01:06:49,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 288 flow [2025-01-10 01:06:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:06:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:06:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2025-01-10 01:06:49,272 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2025-01-10 01:06:49,272 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 116 flow. Second operand 7 states and 143 transitions. [2025-01-10 01:06:49,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 288 flow [2025-01-10 01:06:49,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:06:49,275 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 155 flow [2025-01-10 01:06:49,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=155, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2025-01-10 01:06:49,276 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2025-01-10 01:06:49,278 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 155 flow [2025-01-10 01:06:49,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:49,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:49,278 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:49,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-10 01:06:49,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:49,482 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:49,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:49,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1123286714, now seen corresponding path program 1 times [2025-01-10 01:06:49,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:49,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169983149] [2025-01-10 01:06:49,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:49,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:49,487 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 01:06:49,491 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 01:06:49,491 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:49,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:49,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:49,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169983149] [2025-01-10 01:06:49,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169983149] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:49,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331829275] [2025-01-10 01:06:49,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:49,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:49,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:49,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:06:49,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-10 01:06:49,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 01:06:49,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 01:06:49,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:49,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:49,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:06:49,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:49,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:49,773 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 [2025-01-10 01:06:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:49,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331829275] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:49,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:49,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-01-10 01:06:49,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807288057] [2025-01-10 01:06:49,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:49,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:06:49,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:49,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:06:49,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:06:49,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:49,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 155 flow. Second operand has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:49,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:49,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:49,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:50,048 INFO L124 PetriNetUnfolderBase]: 199/404 cut-off events. [2025-01-10 01:06:50,048 INFO L125 PetriNetUnfolderBase]: For 516/565 co-relation queries the response was YES. [2025-01-10 01:06:50,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1129 conditions, 404 events. 199/404 cut-off events. For 516/565 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1647 event pairs, 88 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 923. Up to 180 conditions per place. [2025-01-10 01:06:50,051 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 51 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2025-01-10 01:06:50,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 397 flow [2025-01-10 01:06:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:06:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:06:50,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2025-01-10 01:06:50,052 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5755102040816327 [2025-01-10 01:06:50,052 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 155 flow. Second operand 7 states and 141 transitions. [2025-01-10 01:06:50,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 397 flow [2025-01-10 01:06:50,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 380 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-01-10 01:06:50,054 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 186 flow [2025-01-10 01:06:50,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2025-01-10 01:06:50,055 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2025-01-10 01:06:50,055 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 186 flow [2025-01-10 01:06:50,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:50,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:50,055 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:50,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-10 01:06:50,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:50,256 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:50,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1254034860, now seen corresponding path program 1 times [2025-01-10 01:06:50,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:50,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735967485] [2025-01-10 01:06:50,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:50,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:50,261 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-10 01:06:50,266 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-10 01:06:50,266 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:50,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:50,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:50,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735967485] [2025-01-10 01:06:50,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735967485] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:50,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598460159] [2025-01-10 01:06:50,336 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:50,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:50,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:50,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:06:50,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-10 01:06:50,374 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-10 01:06:50,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-10 01:06:50,386 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:50,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:50,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:06:50,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:50,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:50,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598460159] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:50,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:50,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-10 01:06:50,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679607990] [2025-01-10 01:06:50,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:50,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:06:50,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:50,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:06:50,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:06:50,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:50,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 186 flow. Second operand has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:50,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:50,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:50,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:50,754 INFO L124 PetriNetUnfolderBase]: 361/757 cut-off events. [2025-01-10 01:06:50,754 INFO L125 PetriNetUnfolderBase]: For 976/992 co-relation queries the response was YES. [2025-01-10 01:06:50,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2317 conditions, 757 events. 361/757 cut-off events. For 976/992 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3713 event pairs, 182 based on Foata normal form. 14/770 useless extension candidates. Maximal degree in co-relation 1229. Up to 322 conditions per place. [2025-01-10 01:06:50,762 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 65 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2025-01-10 01:06:50,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 84 transitions, 546 flow [2025-01-10 01:06:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:06:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:06:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2025-01-10 01:06:50,764 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2025-01-10 01:06:50,764 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 186 flow. Second operand 8 states and 162 transitions. [2025-01-10 01:06:50,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 84 transitions, 546 flow [2025-01-10 01:06:50,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 525 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-01-10 01:06:50,769 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 249 flow [2025-01-10 01:06:50,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=249, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2025-01-10 01:06:50,770 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2025-01-10 01:06:50,770 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 249 flow [2025-01-10 01:06:50,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:50,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:50,771 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:50,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-10 01:06:50,971 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 [2025-01-10 01:06:50,972 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:50,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash 820898327, now seen corresponding path program 1 times [2025-01-10 01:06:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:50,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022832071] [2025-01-10 01:06:50,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:50,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:50,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-10 01:06:50,982 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:06:50,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:50,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:06:51,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:51,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022832071] [2025-01-10 01:06:51,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022832071] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:51,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:51,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:06:51,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51358544] [2025-01-10 01:06:51,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:51,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:06:51,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:51,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:06:51,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:06:51,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:06:51,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:51,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:51,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:06:51,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:51,112 INFO L124 PetriNetUnfolderBase]: 479/930 cut-off events. [2025-01-10 01:06:51,112 INFO L125 PetriNetUnfolderBase]: For 2042/2137 co-relation queries the response was YES. [2025-01-10 01:06:51,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3099 conditions, 930 events. 479/930 cut-off events. For 2042/2137 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4557 event pairs, 138 based on Foata normal form. 3/930 useless extension candidates. Maximal degree in co-relation 1595. Up to 597 conditions per place. [2025-01-10 01:06:51,118 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 47 selfloop transitions, 3 changer transitions 6/61 dead transitions. [2025-01-10 01:06:51,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 440 flow [2025-01-10 01:06:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:06:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:06:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2025-01-10 01:06:51,120 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2025-01-10 01:06:51,120 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 249 flow. Second operand 3 states and 71 transitions. [2025-01-10 01:06:51,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 440 flow [2025-01-10 01:06:51,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 424 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-01-10 01:06:51,124 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 217 flow [2025-01-10 01:06:51,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2025-01-10 01:06:51,125 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2025-01-10 01:06:51,125 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 217 flow [2025-01-10 01:06:51,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:51,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:51,125 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:51,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-01-10 01:06:51,126 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:51,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:51,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1747495329, now seen corresponding path program 1 times [2025-01-10 01:06:51,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:51,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042601615] [2025-01-10 01:06:51,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:51,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:51,131 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-10 01:06:51,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:06:51,137 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:51,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:51,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:51,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042601615] [2025-01-10 01:06:51,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042601615] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:51,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511652971] [2025-01-10 01:06:51,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:51,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:51,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:51,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:06:51,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-10 01:06:51,245 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-10 01:06:51,257 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:06:51,257 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:51,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:51,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:06:51,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:51,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:51,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511652971] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:51,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:51,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-10 01:06:51,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343383024] [2025-01-10 01:06:51,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:51,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:06:51,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:51,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:06:51,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:06:51,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:51,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 217 flow. Second operand has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:51,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:51,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:51,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:51,615 INFO L124 PetriNetUnfolderBase]: 356/696 cut-off events. [2025-01-10 01:06:51,615 INFO L125 PetriNetUnfolderBase]: For 1882/2006 co-relation queries the response was YES. [2025-01-10 01:06:51,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2427 conditions, 696 events. 356/696 cut-off events. For 1882/2006 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3326 event pairs, 209 based on Foata normal form. 13/698 useless extension candidates. Maximal degree in co-relation 1466. Up to 375 conditions per place. [2025-01-10 01:06:51,619 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 53 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2025-01-10 01:06:51,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 495 flow [2025-01-10 01:06:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:06:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:06:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2025-01-10 01:06:51,622 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2025-01-10 01:06:51,622 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 217 flow. Second operand 8 states and 159 transitions. [2025-01-10 01:06:51,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 495 flow [2025-01-10 01:06:51,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 468 flow, removed 12 selfloop flow, removed 3 redundant places. [2025-01-10 01:06:51,626 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 261 flow [2025-01-10 01:06:51,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=261, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2025-01-10 01:06:51,627 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2025-01-10 01:06:51,627 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 261 flow [2025-01-10 01:06:51,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:51,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:51,628 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:51,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-10 01:06:51,832 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 [2025-01-10 01:06:51,832 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:51,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash 123398152, now seen corresponding path program 2 times [2025-01-10 01:06:51,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:51,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437941318] [2025-01-10 01:06:51,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:06:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:51,843 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-10 01:06:51,852 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:06:51,852 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:06:51,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:06:52,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:52,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437941318] [2025-01-10 01:06:52,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437941318] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:52,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726597701] [2025-01-10 01:06:52,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:06:52,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:52,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:52,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:06:52,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-10 01:06:52,044 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-10 01:06:52,054 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:06:52,054 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:06:52,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:52,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 01:06:52,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:52,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:52,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-01-10 01:06:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:52,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726597701] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:52,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:52,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-01-10 01:06:52,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120907838] [2025-01-10 01:06:52,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:52,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 01:06:52,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:52,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 01:06:52,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-01-10 01:06:52,666 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:06:52,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 261 flow. Second operand has 20 states, 20 states have (on average 13.9) internal successors, (278), 20 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:52,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:52,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:06:52,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:53,394 INFO L124 PetriNetUnfolderBase]: 450/851 cut-off events. [2025-01-10 01:06:53,394 INFO L125 PetriNetUnfolderBase]: For 1657/1686 co-relation queries the response was YES. [2025-01-10 01:06:53,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2948 conditions, 851 events. 450/851 cut-off events. For 1657/1686 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4092 event pairs, 91 based on Foata normal form. 28/867 useless extension candidates. Maximal degree in co-relation 1928. Up to 133 conditions per place. [2025-01-10 01:06:53,399 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 100 selfloop transitions, 18 changer transitions 0/125 dead transitions. [2025-01-10 01:06:53,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 125 transitions, 900 flow [2025-01-10 01:06:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-10 01:06:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-10 01:06:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 269 transitions. [2025-01-10 01:06:53,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5489795918367347 [2025-01-10 01:06:53,401 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 261 flow. Second operand 14 states and 269 transitions. [2025-01-10 01:06:53,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 125 transitions, 900 flow [2025-01-10 01:06:53,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 125 transitions, 881 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-01-10 01:06:53,406 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 310 flow [2025-01-10 01:06:53,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=310, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2025-01-10 01:06:53,407 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2025-01-10 01:06:53,407 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 310 flow [2025-01-10 01:06:53,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.9) internal successors, (278), 20 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:53,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:53,407 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:53,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-10 01:06:53,608 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 [2025-01-10 01:06:53,608 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:53,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash -884297965, now seen corresponding path program 2 times [2025-01-10 01:06:53,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:53,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734426031] [2025-01-10 01:06:53,609 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:06:53,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:53,613 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-10 01:06:53,620 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-10 01:06:53,623 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:06:53,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:06:53,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:53,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734426031] [2025-01-10 01:06:53,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734426031] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:53,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030981140] [2025-01-10 01:06:53,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:06:53,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:53,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:53,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:06:53,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-10 01:06:53,805 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-10 01:06:53,818 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-10 01:06:53,818 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:06:53,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:53,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 01:06:53,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:53,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:54,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-01-10 01:06:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:54,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030981140] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:06:54,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:06:54,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-01-10 01:06:54,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052139373] [2025-01-10 01:06:54,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:06:54,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 01:06:54,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:54,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 01:06:54,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-01-10 01:06:54,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:06:54,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 310 flow. Second operand has 20 states, 20 states have (on average 14.2) internal successors, (284), 20 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:54,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:54,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:06:54,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:54,896 INFO L124 PetriNetUnfolderBase]: 557/1014 cut-off events. [2025-01-10 01:06:54,896 INFO L125 PetriNetUnfolderBase]: For 3330/3372 co-relation queries the response was YES. [2025-01-10 01:06:54,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3790 conditions, 1014 events. 557/1014 cut-off events. For 3330/3372 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4724 event pairs, 112 based on Foata normal form. 38/1033 useless extension candidates. Maximal degree in co-relation 2699. Up to 175 conditions per place. [2025-01-10 01:06:54,903 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 103 selfloop transitions, 18 changer transitions 0/129 dead transitions. [2025-01-10 01:06:54,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 1077 flow [2025-01-10 01:06:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-10 01:06:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-10 01:06:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 262 transitions. [2025-01-10 01:06:54,904 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2025-01-10 01:06:54,904 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 310 flow. Second operand 14 states and 262 transitions. [2025-01-10 01:06:54,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 1077 flow [2025-01-10 01:06:54,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 893 flow, removed 32 selfloop flow, removed 11 redundant places. [2025-01-10 01:06:54,911 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 320 flow [2025-01-10 01:06:54,911 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=320, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2025-01-10 01:06:54,912 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 36 predicate places. [2025-01-10 01:06:54,912 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 320 flow [2025-01-10 01:06:54,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.2) internal successors, (284), 20 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:54,912 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:54,912 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] [2025-01-10 01:06:54,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-10 01:06:55,117 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 [2025-01-10 01:06:55,117 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:55,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash -639298134, now seen corresponding path program 1 times [2025-01-10 01:06:55,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:55,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366466082] [2025-01-10 01:06:55,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:55,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:55,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-10 01:06:55,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:06:55,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:55,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:55,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:55,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366466082] [2025-01-10 01:06:55,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366466082] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:55,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057709066] [2025-01-10 01:06:55,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:55,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:55,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:55,183 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:06:55,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-10 01:06:55,218 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-10 01:06:55,231 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:06:55,231 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:55,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:55,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:06:55,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:55,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:55,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057709066] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:55,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:06:55,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-01-10 01:06:55,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683958304] [2025-01-10 01:06:55,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:55,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:06:55,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:55,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:06:55,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:06:55,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:55,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:55,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:55,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:55,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:55,388 INFO L124 PetriNetUnfolderBase]: 515/970 cut-off events. [2025-01-10 01:06:55,388 INFO L125 PetriNetUnfolderBase]: For 2715/2735 co-relation queries the response was YES. [2025-01-10 01:06:55,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3495 conditions, 970 events. 515/970 cut-off events. For 2715/2735 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4579 event pairs, 153 based on Foata normal form. 34/984 useless extension candidates. Maximal degree in co-relation 2624. Up to 457 conditions per place. [2025-01-10 01:06:55,394 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 49 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2025-01-10 01:06:55,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 67 transitions, 508 flow [2025-01-10 01:06:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:06:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:06:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2025-01-10 01:06:55,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2025-01-10 01:06:55,395 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 320 flow. Second operand 5 states and 94 transitions. [2025-01-10 01:06:55,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 67 transitions, 508 flow [2025-01-10 01:06:55,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 464 flow, removed 8 selfloop flow, removed 11 redundant places. [2025-01-10 01:06:55,399 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 292 flow [2025-01-10 01:06:55,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2025-01-10 01:06:55,400 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2025-01-10 01:06:55,400 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 292 flow [2025-01-10 01:06:55,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:55,400 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:55,400 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] [2025-01-10 01:06:55,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-10 01:06:55,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:55,601 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:55,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:55,602 INFO L85 PathProgramCache]: Analyzing trace with hash -534982244, now seen corresponding path program 1 times [2025-01-10 01:06:55,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:55,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005595857] [2025-01-10 01:06:55,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:55,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:55,608 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-10 01:06:55,612 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:06:55,612 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:55,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:06:55,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:55,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005595857] [2025-01-10 01:06:55,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005595857] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:55,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990605622] [2025-01-10 01:06:55,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:55,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:55,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:06:55,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:06:55,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-10 01:06:55,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-10 01:06:55,733 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:06:55,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:55,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:55,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:06:55,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:06:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:55,766 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:06:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:06:55,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990605622] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:06:55,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:06:55,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2025-01-10 01:06:55,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162225781] [2025-01-10 01:06:55,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:55,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:06:55,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:55,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:06:55,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-01-10 01:06:55,807 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:06:55,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:55,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:55,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:06:55,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:55,894 INFO L124 PetriNetUnfolderBase]: 463/928 cut-off events. [2025-01-10 01:06:55,895 INFO L125 PetriNetUnfolderBase]: For 3115/3121 co-relation queries the response was YES. [2025-01-10 01:06:55,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3301 conditions, 928 events. 463/928 cut-off events. For 3115/3121 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4412 event pairs, 154 based on Foata normal form. 30/926 useless extension candidates. Maximal degree in co-relation 2617. Up to 440 conditions per place. [2025-01-10 01:06:55,901 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 46 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2025-01-10 01:06:55,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 491 flow [2025-01-10 01:06:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:06:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:06:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2025-01-10 01:06:55,902 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-01-10 01:06:55,902 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 292 flow. Second operand 5 states and 95 transitions. [2025-01-10 01:06:55,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 491 flow [2025-01-10 01:06:55,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 468 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-01-10 01:06:55,907 INFO L231 Difference]: Finished difference. Result has 68 places, 51 transitions, 301 flow [2025-01-10 01:06:55,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=68, PETRI_TRANSITIONS=51} [2025-01-10 01:06:55,908 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2025-01-10 01:06:55,908 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 51 transitions, 301 flow [2025-01-10 01:06:55,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:55,908 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:55,908 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:55,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-10 01:06:56,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:06:56,109 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:06:56,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash -872293069, now seen corresponding path program 1 times [2025-01-10 01:06:56,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:56,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912380916] [2025-01-10 01:06:56,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:06:56,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:56,114 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 01:06:56,123 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 01:06:56,123 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:56,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-10 01:06:56,123 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-10 01:06:56,125 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 01:06:56,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 01:06:56,143 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:06:56,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-10 01:06:56,165 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-10 01:06:56,165 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-10 01:06:56,166 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2025-01-10 01:06:56,167 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2025-01-10 01:06:56,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-01-10 01:06:56,168 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:06:56,204 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-01-10 01:06:56,205 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-01-10 01:06:56,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 01:06:56 BasicIcfg [2025-01-10 01:06:56,210 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-01-10 01:06:56,210 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-01-10 01:06:56,210 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-01-10 01:06:56,210 INFO L274 PluginConnector]: Witness Printer initialized [2025-01-10 01:06:56,211 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:06:46" (3/4) ... [2025-01-10 01:06:56,212 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-01-10 01:06:56,213 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-01-10 01:06:56,214 INFO L158 Benchmark]: Toolchain (without parser) took 10714.40ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 130.1MB in the beginning and 86.5MB in the end (delta: 43.6MB). Peak memory consumption was 75.9MB. Max. memory is 16.1GB. [2025-01-10 01:06:56,214 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 201.3MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 01:06:56,214 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.49ms. Allocated memory is still 167.8MB. Free memory was 129.7MB in the beginning and 117.9MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-01-10 01:06:56,215 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.53ms. Allocated memory is still 167.8MB. Free memory was 117.9MB in the beginning and 116.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 01:06:56,215 INFO L158 Benchmark]: Boogie Preprocessor took 42.54ms. Allocated memory is still 167.8MB. Free memory was 116.4MB in the beginning and 114.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 01:06:56,216 INFO L158 Benchmark]: RCFGBuilder took 569.28ms. Allocated memory is still 167.8MB. Free memory was 114.6MB in the beginning and 71.3MB in the end (delta: 43.3MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2025-01-10 01:06:56,216 INFO L158 Benchmark]: TraceAbstraction took 9921.00ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 70.4MB in the beginning and 86.6MB in the end (delta: -16.2MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2025-01-10 01:06:56,216 INFO L158 Benchmark]: Witness Printer took 2.85ms. Allocated memory is still 201.3MB. Free memory was 86.6MB in the beginning and 86.5MB in the end (delta: 60.0kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 01:06:56,217 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 201.3MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 153.49ms. Allocated memory is still 167.8MB. Free memory was 129.7MB in the beginning and 117.9MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.53ms. Allocated memory is still 167.8MB. Free memory was 117.9MB in the beginning and 116.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 42.54ms. Allocated memory is still 167.8MB. Free memory was 116.4MB in the beginning and 114.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 569.28ms. Allocated memory is still 167.8MB. Free memory was 114.6MB in the beginning and 71.3MB in the end (delta: 43.3MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * TraceAbstraction took 9921.00ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 70.4MB in the beginning and 86.6MB in the end (delta: -16.2MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. * Witness Printer took 2.85ms. Allocated memory is still 201.3MB. Free memory was 86.6MB in the beginning and 86.5MB in the end (delta: 60.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L39] 0 int* A; [L40] 0 _Atomic int counter; [L41] 0 int N; [L66] 0 pthread_t t1, t2; [L68] 0 N = __VERIFIER_nondet_int() [L69] CALL, EXPR 0 create_fresh_int_array(N) [L84] CALL 0 assume_abort_if_not(size >= 0) [L36] COND FALSE 0 !(!cond) [L84] RET 0 assume_abort_if_not(size >= 0) [L85] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L36] COND FALSE 0 !(!cond) [L85] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L87] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L88] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={-2:0}, counter=0, i=0, size=1] [L88] COND TRUE 0 i < size [L89] 0 arr[i] = __VERIFIER_nondet_int() [L88] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={-2:0}, counter=0, i=1, size=1] [L88] COND FALSE 0 !(i < size) [L91] 0 return arr; [L69] RET, EXPR 0 create_fresh_int_array(N) [L69] 0 A = create_fresh_int_array(N) [L72] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-2:0}, N=1, counter=0, t1=-1] [L73] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={-2:0}, N=1, counter=0, t1=-1, t2=0] [L57] 2 int i=0; VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L57] COND TRUE 2 i= 0 || a >= -2147483648 - b) [L36] COND FALSE 1 !(!cond) [L101] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L102] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L36] COND FALSE 1 !(!cond) [L102] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L103] 1 return a + b; [L49] RET, EXPR 1 plus(counter, A[i]) [L49] 1 int tmp = plus(counter, A[i]); [L58] EXPR 2 A[i] [L58] CALL, EXPR 2 minus(counter, A[i]) [L95] CALL 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L36] COND FALSE 2 !(!cond) [L95] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L96] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L36] COND FALSE 2 !(!cond) [L96] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L97] 2 return a - b; [L58] RET, EXPR 2 minus(counter, A[i]) [L58] 2 int tmp = minus(counter, A[i]); [L50] 1 counter = tmp VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=6, i=0, tmp=6] [L59] 2 counter = tmp VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-6, i=0, tmp=-6] [L48] 1 i++ VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-6, i=1] [L48] COND FALSE 1 !(i 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 -> 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 [2025-01-10 01:06:58,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:06:58,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:06:58,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:06:58,532 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:06:58,532 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:06:58,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-01-10 01:06:59,708 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c792bb43b/77f23a8dac704012b667ae5157340b66/FLAG8a40c32f7 [2025-01-10 01:06:59,902 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:06:59,903 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-01-10 01:06:59,910 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c792bb43b/77f23a8dac704012b667ae5157340b66/FLAG8a40c32f7 [2025-01-10 01:07:00,266 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c792bb43b/77f23a8dac704012b667ae5157340b66 [2025-01-10 01:07:00,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:07:00,270 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:07:00,271 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:07:00,271 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:07:00,275 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:07:00,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f71d1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00, skipping insertion in model container [2025-01-10 01:07:00,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,290 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:07:00,409 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-10 01:07:00,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:07:00,424 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:07:00,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:07:00,465 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:07:00,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00 WrapperNode [2025-01-10 01:07:00,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:07:00,468 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:07:00,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:07:00,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:07:00,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,482 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,501 INFO L138 Inliner]: procedures = 25, calls = 23, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 123 [2025-01-10 01:07:00,502 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:07:00,502 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:07:00,506 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:07:00,506 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:07:00,513 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,518 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,534 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-10 01:07:00,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,540 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,543 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,548 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:07:00,549 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:07:00,549 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:07:00,549 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:07:00,550 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (1/1) ... [2025-01-10 01:07:00,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:07:00,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:00,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-10 01:07:00,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-10 01:07:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:07:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:07:00,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:07:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:07:00,609 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:07:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-01-10 01:07:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-01-10 01:07:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:07:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-01-10 01:07:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-01-10 01:07:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:07:00,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:07:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-01-10 01:07:00,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-01-10 01:07:00,611 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 01:07:00,690 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:07:00,691 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:07:00,919 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:07:00,919 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:07:01,118 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:07:01,118 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 01:07:01,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:07:01 BoogieIcfgContainer [2025-01-10 01:07:01,119 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:07:01,120 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:07:01,120 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:07:01,125 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:07:01,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:07:00" (1/3) ... [2025-01-10 01:07:01,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6a73bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:07:01, skipping insertion in model container [2025-01-10 01:07:01,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:07:00" (2/3) ... [2025-01-10 01:07:01,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6a73bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:07:01, skipping insertion in model container [2025-01-10 01:07:01,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:07:01" (3/3) ... [2025-01-10 01:07:01,129 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2025-01-10 01:07:01,141 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:07:01,143 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-01-10 01:07:01,143 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:07:01,212 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-10 01:07:01,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2025-01-10 01:07:01,264 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2025-01-10 01:07:01,266 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 01:07:01,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2025-01-10 01:07:01,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2025-01-10 01:07:01,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2025-01-10 01:07:01,279 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:07:01,290 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;@b0fde96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:07:01,290 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-01-10 01:07:01,293 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:07:01,294 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-01-10 01:07:01,294 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:07:01,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:01,294 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:07:01,295 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:01,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash 423285, now seen corresponding path program 1 times [2025-01-10 01:07:01,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:01,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650511664] [2025-01-10 01:07:01,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:01,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:01,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:01,313 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:01,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-10 01:07:01,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:07:01,383 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:07:01,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:01,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:01,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-10 01:07:01,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:01,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-01-10 01:07:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:01,432 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:01,432 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:01,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650511664] [2025-01-10 01:07:01,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650511664] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:01,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:01,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:07:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080254495] [2025-01-10 01:07:01,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:01,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:07:01,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:01,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:07:01,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:07:01,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:01,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:01,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:01,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:01,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:01,565 INFO L124 PetriNetUnfolderBase]: 62/153 cut-off events. [2025-01-10 01:07:01,565 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-01-10 01:07:01,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 153 events. 62/153 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 604 event pairs, 42 based on Foata normal form. 1/140 useless extension candidates. Maximal degree in co-relation 240. Up to 109 conditions per place. [2025-01-10 01:07:01,568 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2025-01-10 01:07:01,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 108 flow [2025-01-10 01:07:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:07:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:07:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2025-01-10 01:07:01,575 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-01-10 01:07:01,576 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 60 transitions. [2025-01-10 01:07:01,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 108 flow [2025-01-10 01:07:01,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:07:01,584 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2025-01-10 01:07:01,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2025-01-10 01:07:01,588 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-01-10 01:07:01,588 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2025-01-10 01:07:01,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:01,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:01,588 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:07:01,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-10 01:07:01,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:01,792 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:01,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:01,793 INFO L85 PathProgramCache]: Analyzing trace with hash 423286, now seen corresponding path program 1 times [2025-01-10 01:07:01,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:01,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635299555] [2025-01-10 01:07:01,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:01,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:01,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:01,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-10 01:07:01,835 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:07:01,841 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:07:01,841 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:01,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:01,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-10 01:07:01,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:01,866 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 7 [2025-01-10 01:07:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:01,923 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:01,923 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:01,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635299555] [2025-01-10 01:07:01,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635299555] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:01,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:01,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:07:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136798436] [2025-01-10 01:07:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:01,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:07:01,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:01,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:07:01,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:07:01,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:01,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:01,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:01,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:01,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:02,094 INFO L124 PetriNetUnfolderBase]: 63/156 cut-off events. [2025-01-10 01:07:02,094 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:07:02,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 156 events. 63/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 620 event pairs, 42 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 260. Up to 114 conditions per place. [2025-01-10 01:07:02,095 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2025-01-10 01:07:02,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 120 flow [2025-01-10 01:07:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:07:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:07:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2025-01-10 01:07:02,097 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-01-10 01:07:02,097 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 76 transitions. [2025-01-10 01:07:02,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 120 flow [2025-01-10 01:07:02,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:07:02,098 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 89 flow [2025-01-10 01:07:02,099 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2025-01-10 01:07:02,099 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-01-10 01:07:02,099 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 89 flow [2025-01-10 01:07:02,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:02,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:02,099 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-01-10 01:07:02,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-10 01:07:02,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:02,301 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:02,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash 406790785, now seen corresponding path program 1 times [2025-01-10 01:07:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:02,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777189452] [2025-01-10 01:07:02,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:02,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:02,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:02,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:02,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-10 01:07:02,340 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:07:02,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:07:02,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:02,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:02,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:02,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:02,363 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 7 [2025-01-10 01:07:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:02,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:02,625 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777189452] [2025-01-10 01:07:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777189452] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:02,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:02,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2025-01-10 01:07:02,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114474709] [2025-01-10 01:07:02,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:02,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:07:02,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:02,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:07:02,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:07:02,726 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:02,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:02,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:02,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:02,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:03,151 INFO L124 PetriNetUnfolderBase]: 66/165 cut-off events. [2025-01-10 01:07:03,151 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:07:03,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 165 events. 66/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 674 event pairs, 42 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 267. Up to 117 conditions per place. [2025-01-10 01:07:03,153 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 13 changer transitions 0/41 dead transitions. [2025-01-10 01:07:03,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 189 flow [2025-01-10 01:07:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:07:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:07:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2025-01-10 01:07:03,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2025-01-10 01:07:03,154 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 89 flow. Second operand 10 states and 165 transitions. [2025-01-10 01:07:03,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 189 flow [2025-01-10 01:07:03,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:07:03,156 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 166 flow [2025-01-10 01:07:03,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=166, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2025-01-10 01:07:03,156 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2025-01-10 01:07:03,156 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 166 flow [2025-01-10 01:07:03,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:03,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:03,157 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 01:07:03,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-10 01:07:03,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:03,357 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:03,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash -272363654, now seen corresponding path program 1 times [2025-01-10 01:07:03,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:03,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193141621] [2025-01-10 01:07:03,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:03,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:03,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:03,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-10 01:07:03,407 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:07:03,413 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:07:03,413 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:03,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:03,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-10 01:07:03,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:03,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-01-10 01:07:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:03,448 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:03,449 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:03,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193141621] [2025-01-10 01:07:03,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193141621] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:03,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:03,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:07:03,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939192770] [2025-01-10 01:07:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:03,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:07:03,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:03,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:07:03,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:07:03,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-01-10 01:07:03,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:03,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:03,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-01-10 01:07:03,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:03,534 INFO L124 PetriNetUnfolderBase]: 66/155 cut-off events. [2025-01-10 01:07:03,534 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-01-10 01:07:03,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 155 events. 66/155 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 579 event pairs, 42 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 297. Up to 112 conditions per place. [2025-01-10 01:07:03,536 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 25 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2025-01-10 01:07:03,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 224 flow [2025-01-10 01:07:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:07:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:07:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2025-01-10 01:07:03,538 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-01-10 01:07:03,538 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 166 flow. Second operand 4 states and 65 transitions. [2025-01-10 01:07:03,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 224 flow [2025-01-10 01:07:03,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 194 flow, removed 11 selfloop flow, removed 3 redundant places. [2025-01-10 01:07:03,540 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 144 flow [2025-01-10 01:07:03,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2025-01-10 01:07:03,540 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2025-01-10 01:07:03,540 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 144 flow [2025-01-10 01:07:03,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:03,542 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:03,542 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 01:07:03,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-10 01:07:03,742 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 [2025-01-10 01:07:03,743 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:03,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:03,744 INFO L85 PathProgramCache]: Analyzing trace with hash -272363653, now seen corresponding path program 1 times [2025-01-10 01:07:03,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:03,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817061862] [2025-01-10 01:07:03,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:03,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:03,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:03,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:03,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-10 01:07:03,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 01:07:03,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 01:07:03,790 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:03,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:03,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:03,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:03,848 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:03,848 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:03,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817061862] [2025-01-10 01:07:03,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817061862] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:03,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:03,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:07:03,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169037510] [2025-01-10 01:07:03,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:03,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:07:03,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:03,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:07:03,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:07:03,867 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:03,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:03,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:03,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:03,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:03,990 INFO L124 PetriNetUnfolderBase]: 116/270 cut-off events. [2025-01-10 01:07:03,990 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-01-10 01:07:03,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 270 events. 116/270 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1179 event pairs, 72 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 508. Up to 145 conditions per place. [2025-01-10 01:07:03,991 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 47 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2025-01-10 01:07:03,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 293 flow [2025-01-10 01:07:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:07:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:07:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2025-01-10 01:07:03,992 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2025-01-10 01:07:03,992 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 144 flow. Second operand 5 states and 109 transitions. [2025-01-10 01:07:03,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 293 flow [2025-01-10 01:07:03,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:07:03,996 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 162 flow [2025-01-10 01:07:03,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2025-01-10 01:07:03,996 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2025-01-10 01:07:03,996 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 162 flow [2025-01-10 01:07:03,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:03,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:03,997 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:04,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-10 01:07:04,197 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 [2025-01-10 01:07:04,198 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:04,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:04,198 INFO L85 PathProgramCache]: Analyzing trace with hash 240945926, now seen corresponding path program 1 times [2025-01-10 01:07:04,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:04,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632984912] [2025-01-10 01:07:04,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:04,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:04,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:04,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:04,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-10 01:07:04,239 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:07:04,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:07:04,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:04,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:04,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:04,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:04,297 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:04,298 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:04,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632984912] [2025-01-10 01:07:04,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632984912] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:04,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:04,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:07:04,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115435055] [2025-01-10 01:07:04,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:04,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:07:04,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:04,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:07:04,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:07:04,317 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:04,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:04,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:04,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:04,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:04,441 INFO L124 PetriNetUnfolderBase]: 100/221 cut-off events. [2025-01-10 01:07:04,442 INFO L125 PetriNetUnfolderBase]: For 73/82 co-relation queries the response was YES. [2025-01-10 01:07:04,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 221 events. 100/221 cut-off events. For 73/82 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 825 event pairs, 67 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 494. Up to 143 conditions per place. [2025-01-10 01:07:04,443 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 42 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2025-01-10 01:07:04,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 295 flow [2025-01-10 01:07:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:07:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:07:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2025-01-10 01:07:04,444 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2025-01-10 01:07:04,444 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 162 flow. Second operand 5 states and 104 transitions. [2025-01-10 01:07:04,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 295 flow [2025-01-10 01:07:04,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:07:04,446 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 182 flow [2025-01-10 01:07:04,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2025-01-10 01:07:04,446 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2025-01-10 01:07:04,446 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 182 flow [2025-01-10 01:07:04,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:04,446 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:04,448 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:04,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-10 01:07:04,648 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 [2025-01-10 01:07:04,649 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:04,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:04,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1691008368, now seen corresponding path program 1 times [2025-01-10 01:07:04,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:04,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271641347] [2025-01-10 01:07:04,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:04,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:04,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:04,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-10 01:07:04,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 01:07:04,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 01:07:04,697 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:04,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:04,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:07:04,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:04,708 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 7 [2025-01-10 01:07:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:04,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:05,107 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:05,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271641347] [2025-01-10 01:07:05,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271641347] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:05,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:05,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2025-01-10 01:07:05,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626903140] [2025-01-10 01:07:05,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:05,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 01:07:05,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:05,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 01:07:05,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-01-10 01:07:05,383 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:05,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 182 flow. Second operand has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:05,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:05,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:05,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:06,247 INFO L124 PetriNetUnfolderBase]: 311/692 cut-off events. [2025-01-10 01:07:06,247 INFO L125 PetriNetUnfolderBase]: For 169/200 co-relation queries the response was YES. [2025-01-10 01:07:06,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 692 events. 311/692 cut-off events. For 169/200 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3757 event pairs, 138 based on Foata normal form. 0/660 useless extension candidates. Maximal degree in co-relation 1390. Up to 163 conditions per place. [2025-01-10 01:07:06,253 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 79 selfloop transitions, 23 changer transitions 0/108 dead transitions. [2025-01-10 01:07:06,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 108 transitions, 564 flow [2025-01-10 01:07:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:07:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:07:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 255 transitions. [2025-01-10 01:07:06,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5604395604395604 [2025-01-10 01:07:06,255 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 182 flow. Second operand 13 states and 255 transitions. [2025-01-10 01:07:06,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 108 transitions, 564 flow [2025-01-10 01:07:06,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 108 transitions, 559 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:07:06,260 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 274 flow [2025-01-10 01:07:06,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=274, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2025-01-10 01:07:06,262 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2025-01-10 01:07:06,262 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 274 flow [2025-01-10 01:07:06,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:06,262 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:06,262 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:06,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-10 01:07:06,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:06,463 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:06,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1571992357, now seen corresponding path program 1 times [2025-01-10 01:07:06,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:06,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977989715] [2025-01-10 01:07:06,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:06,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:06,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:06,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-10 01:07:06,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 01:07:06,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 01:07:06,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:06,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:06,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:07:06,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:06,536 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 7 [2025-01-10 01:07:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:06,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:06,964 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:06,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977989715] [2025-01-10 01:07:06,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977989715] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:06,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:06,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2025-01-10 01:07:06,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945994446] [2025-01-10 01:07:06,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:06,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 01:07:06,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:06,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 01:07:06,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-01-10 01:07:07,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:07,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 274 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:07,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:07,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:07,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:07,984 INFO L124 PetriNetUnfolderBase]: 405/822 cut-off events. [2025-01-10 01:07:07,984 INFO L125 PetriNetUnfolderBase]: For 1032/1215 co-relation queries the response was YES. [2025-01-10 01:07:07,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 822 events. 405/822 cut-off events. For 1032/1215 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4297 event pairs, 184 based on Foata normal form. 0/785 useless extension candidates. Maximal degree in co-relation 2070. Up to 179 conditions per place. [2025-01-10 01:07:07,990 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 88 selfloop transitions, 23 changer transitions 0/117 dead transitions. [2025-01-10 01:07:07,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 117 transitions, 746 flow [2025-01-10 01:07:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:07:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:07:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2025-01-10 01:07:07,993 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5516483516483517 [2025-01-10 01:07:07,993 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 274 flow. Second operand 13 states and 251 transitions. [2025-01-10 01:07:07,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 117 transitions, 746 flow [2025-01-10 01:07:07,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 725 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-01-10 01:07:07,999 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 356 flow [2025-01-10 01:07:08,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=356, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2025-01-10 01:07:08,001 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2025-01-10 01:07:08,002 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 356 flow [2025-01-10 01:07:08,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:08,003 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:08,003 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-01-10 01:07:08,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:08,203 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 [2025-01-10 01:07:08,203 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:08,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1310891742, now seen corresponding path program 2 times [2025-01-10 01:07:08,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:08,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641090249] [2025-01-10 01:07:08,204 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:08,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:08,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:08,206 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:08,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-10 01:07:08,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-01-10 01:07:08,255 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:07:08,255 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:08,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:08,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 01:07:08,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:08,269 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 7 [2025-01-10 01:07:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:08,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:08,934 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:08,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641090249] [2025-01-10 01:07:08,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641090249] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:08,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:08,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-01-10 01:07:08,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096685662] [2025-01-10 01:07:08,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:08,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:07:08,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:08,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:07:08,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:07:09,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:09,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 356 flow. Second operand has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:09,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:09,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:09,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:10,916 INFO L124 PetriNetUnfolderBase]: 359/798 cut-off events. [2025-01-10 01:07:10,916 INFO L125 PetriNetUnfolderBase]: For 1148/1270 co-relation queries the response was YES. [2025-01-10 01:07:10,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 798 events. 359/798 cut-off events. For 1148/1270 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4422 event pairs, 232 based on Foata normal form. 6/796 useless extension candidates. Maximal degree in co-relation 2209. Up to 601 conditions per place. [2025-01-10 01:07:10,926 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 45 selfloop transitions, 31 changer transitions 0/83 dead transitions. [2025-01-10 01:07:10,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 646 flow [2025-01-10 01:07:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-01-10 01:07:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-01-10 01:07:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 342 transitions. [2025-01-10 01:07:10,940 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44415584415584414 [2025-01-10 01:07:10,940 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 356 flow. Second operand 22 states and 342 transitions. [2025-01-10 01:07:10,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 646 flow [2025-01-10 01:07:10,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 83 transitions, 614 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-01-10 01:07:10,943 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 554 flow [2025-01-10 01:07:10,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=554, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2025-01-10 01:07:10,946 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2025-01-10 01:07:10,946 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 554 flow [2025-01-10 01:07:10,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:10,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:10,946 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:10,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-10 01:07:11,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:11,147 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:11,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:11,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1551942859, now seen corresponding path program 1 times [2025-01-10 01:07:11,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:11,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539090575] [2025-01-10 01:07:11,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:11,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:11,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:11,150 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:11,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-10 01:07:11,184 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-10 01:07:11,196 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-10 01:07:11,196 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:11,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:11,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:07:11,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:11,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:11,339 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:11,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539090575] [2025-01-10 01:07:11,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539090575] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:11,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:11,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2025-01-10 01:07:11,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725344948] [2025-01-10 01:07:11,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:11,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 01:07:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:11,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 01:07:11,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-01-10 01:07:11,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:11,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 554 flow. Second operand has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:11,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:11,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:11,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:11,731 INFO L124 PetriNetUnfolderBase]: 397/821 cut-off events. [2025-01-10 01:07:11,731 INFO L125 PetriNetUnfolderBase]: For 992/1064 co-relation queries the response was YES. [2025-01-10 01:07:11,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 821 events. 397/821 cut-off events. For 992/1064 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4228 event pairs, 193 based on Foata normal form. 14/829 useless extension candidates. Maximal degree in co-relation 2587. Up to 394 conditions per place. [2025-01-10 01:07:11,735 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 77 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2025-01-10 01:07:11,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 113 transitions, 896 flow [2025-01-10 01:07:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:07:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:07:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2025-01-10 01:07:11,736 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2025-01-10 01:07:11,736 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 554 flow. Second operand 8 states and 162 transitions. [2025-01-10 01:07:11,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 113 transitions, 896 flow [2025-01-10 01:07:11,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 113 transitions, 816 flow, removed 27 selfloop flow, removed 9 redundant places. [2025-01-10 01:07:11,742 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 538 flow [2025-01-10 01:07:11,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=538, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2025-01-10 01:07:11,744 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2025-01-10 01:07:11,744 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 538 flow [2025-01-10 01:07:11,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:11,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:11,744 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:11,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:11,945 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 [2025-01-10 01:07:11,945 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:11,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:11,945 INFO L85 PathProgramCache]: Analyzing trace with hash -924716581, now seen corresponding path program 1 times [2025-01-10 01:07:11,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:11,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476121816] [2025-01-10 01:07:11,946 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:11,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:11,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:11,948 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:11,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-10 01:07:11,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-10 01:07:11,991 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:07:11,991 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:11,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:11,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-01-10 01:07:11,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:12,008 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:12,008 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:12,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476121816] [2025-01-10 01:07:12,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476121816] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:12,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:12,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:07:12,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202510188] [2025-01-10 01:07:12,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:12,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:07:12,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:12,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:07:12,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:07:12,011 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:12,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 538 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:12,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:12,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:12,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:12,143 INFO L124 PetriNetUnfolderBase]: 555/1131 cut-off events. [2025-01-10 01:07:12,143 INFO L125 PetriNetUnfolderBase]: For 1752/1901 co-relation queries the response was YES. [2025-01-10 01:07:12,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 1131 events. 555/1131 cut-off events. For 1752/1901 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6158 event pairs, 167 based on Foata normal form. 4/1134 useless extension candidates. Maximal degree in co-relation 3636. Up to 637 conditions per place. [2025-01-10 01:07:12,150 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 92 selfloop transitions, 3 changer transitions 6/107 dead transitions. [2025-01-10 01:07:12,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 107 transitions, 863 flow [2025-01-10 01:07:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:07:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:07:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2025-01-10 01:07:12,151 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2025-01-10 01:07:12,151 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 538 flow. Second operand 3 states and 71 transitions. [2025-01-10 01:07:12,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 107 transitions, 863 flow [2025-01-10 01:07:12,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 107 transitions, 844 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-01-10 01:07:12,157 INFO L231 Difference]: Finished difference. Result has 93 places, 79 transitions, 502 flow [2025-01-10 01:07:12,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=502, PETRI_PLACES=93, PETRI_TRANSITIONS=79} [2025-01-10 01:07:12,157 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2025-01-10 01:07:12,158 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 79 transitions, 502 flow [2025-01-10 01:07:12,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:12,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:12,159 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:12,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-10 01:07:12,359 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 [2025-01-10 01:07:12,359 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:12,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash -274273792, now seen corresponding path program 1 times [2025-01-10 01:07:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:12,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601352022] [2025-01-10 01:07:12,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:12,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:12,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:12,362 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:12,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-10 01:07:12,393 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-10 01:07:12,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:07:12,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:12,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:12,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:07:12,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:12,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:12,596 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:12,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601352022] [2025-01-10 01:07:12,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601352022] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:12,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:12,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2025-01-10 01:07:12,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345212910] [2025-01-10 01:07:12,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:12,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 01:07:12,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:12,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 01:07:12,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-01-10 01:07:12,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:12,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 79 transitions, 502 flow. Second operand has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:12,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:12,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:12,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:12,986 INFO L124 PetriNetUnfolderBase]: 475/958 cut-off events. [2025-01-10 01:07:12,986 INFO L125 PetriNetUnfolderBase]: For 1580/1784 co-relation queries the response was YES. [2025-01-10 01:07:12,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 958 events. 475/958 cut-off events. For 1580/1784 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5065 event pairs, 293 based on Foata normal form. 13/967 useless extension candidates. Maximal degree in co-relation 3171. Up to 580 conditions per place. [2025-01-10 01:07:12,990 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 65 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2025-01-10 01:07:12,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 778 flow [2025-01-10 01:07:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:07:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:07:12,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2025-01-10 01:07:12,991 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2025-01-10 01:07:12,991 INFO L175 Difference]: Start difference. First operand has 93 places, 79 transitions, 502 flow. Second operand 8 states and 159 transitions. [2025-01-10 01:07:12,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 778 flow [2025-01-10 01:07:12,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 100 transitions, 717 flow, removed 14 selfloop flow, removed 7 redundant places. [2025-01-10 01:07:12,996 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 511 flow [2025-01-10 01:07:12,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=511, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2025-01-10 01:07:12,997 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 53 predicate places. [2025-01-10 01:07:12,997 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 511 flow [2025-01-10 01:07:12,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:12,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:12,997 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:13,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-10 01:07:13,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:13,198 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:13,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1793133194, now seen corresponding path program 2 times [2025-01-10 01:07:13,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:13,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289444840] [2025-01-10 01:07:13,198 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:13,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:13,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:13,200 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:13,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-10 01:07:13,231 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-10 01:07:13,246 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:07:13,246 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:13,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:13,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 01:07:13,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:13,255 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 7 [2025-01-10 01:07:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:13,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:13,866 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:13,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289444840] [2025-01-10 01:07:13,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289444840] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:13,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:13,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2025-01-10 01:07:13,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739969502] [2025-01-10 01:07:13,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:13,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:07:13,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:13,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:07:13,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:07:14,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:14,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 511 flow. Second operand has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:14,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:14,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:14,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:16,088 INFO L124 PetriNetUnfolderBase]: 924/1945 cut-off events. [2025-01-10 01:07:16,088 INFO L125 PetriNetUnfolderBase]: For 2722/2903 co-relation queries the response was YES. [2025-01-10 01:07:16,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6006 conditions, 1945 events. 924/1945 cut-off events. For 2722/2903 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12612 event pairs, 355 based on Foata normal form. 34/1965 useless extension candidates. Maximal degree in co-relation 5951. Up to 355 conditions per place. [2025-01-10 01:07:16,098 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 145 selfloop transitions, 48 changer transitions 0/201 dead transitions. [2025-01-10 01:07:16,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 201 transitions, 1452 flow [2025-01-10 01:07:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-10 01:07:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-01-10 01:07:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 360 transitions. [2025-01-10 01:07:16,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5413533834586466 [2025-01-10 01:07:16,102 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 511 flow. Second operand 19 states and 360 transitions. [2025-01-10 01:07:16,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 201 transitions, 1452 flow [2025-01-10 01:07:16,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 201 transitions, 1388 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-01-10 01:07:16,112 INFO L231 Difference]: Finished difference. Result has 106 places, 96 transitions, 700 flow [2025-01-10 01:07:16,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=700, PETRI_PLACES=106, PETRI_TRANSITIONS=96} [2025-01-10 01:07:16,113 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 70 predicate places. [2025-01-10 01:07:16,113 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 96 transitions, 700 flow [2025-01-10 01:07:16,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:16,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:16,113 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:16,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:16,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:16,314 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:16,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:16,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1364161615, now seen corresponding path program 2 times [2025-01-10 01:07:16,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:16,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161191399] [2025-01-10 01:07:16,315 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:16,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:16,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:16,317 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:16,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-10 01:07:16,361 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-10 01:07:16,368 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 14 statements. [2025-01-10 01:07:16,368 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:07:16,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:16,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-10 01:07:16,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:16,378 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 7 [2025-01-10 01:07:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-10 01:07:16,512 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:16,512 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:16,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161191399] [2025-01-10 01:07:16,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161191399] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:16,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:16,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:07:16,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408906095] [2025-01-10 01:07:16,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:16,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:07:16,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:16,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:07:16,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:07:16,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:16,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 700 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:16,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:16,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:16,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:16,931 INFO L124 PetriNetUnfolderBase]: 1197/2279 cut-off events. [2025-01-10 01:07:16,931 INFO L125 PetriNetUnfolderBase]: For 5379/5721 co-relation queries the response was YES. [2025-01-10 01:07:16,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7991 conditions, 2279 events. 1197/2279 cut-off events. For 5379/5721 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13960 event pairs, 533 based on Foata normal form. 70/2329 useless extension candidates. Maximal degree in co-relation 7931. Up to 1277 conditions per place. [2025-01-10 01:07:16,943 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 96 selfloop transitions, 31 changer transitions 0/135 dead transitions. [2025-01-10 01:07:16,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 1140 flow [2025-01-10 01:07:16,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:07:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:07:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2025-01-10 01:07:16,947 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-01-10 01:07:16,947 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 700 flow. Second operand 6 states and 114 transitions. [2025-01-10 01:07:16,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 1140 flow [2025-01-10 01:07:16,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 135 transitions, 1116 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-01-10 01:07:16,960 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 822 flow [2025-01-10 01:07:16,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=822, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2025-01-10 01:07:16,961 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 70 predicate places. [2025-01-10 01:07:16,961 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 822 flow [2025-01-10 01:07:16,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:16,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:16,962 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:16,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-10 01:07:17,166 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 [2025-01-10 01:07:17,166 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:17,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1708275733, now seen corresponding path program 2 times [2025-01-10 01:07:17,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:17,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371370137] [2025-01-10 01:07:17,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:17,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:17,169 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:17,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-10 01:07:17,202 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-10 01:07:17,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-10 01:07:17,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:17,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:17,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:07:17,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:17,236 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 7 [2025-01-10 01:07:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:17,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:17,694 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:17,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371370137] [2025-01-10 01:07:17,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371370137] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:17,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:17,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-01-10 01:07:17,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452473748] [2025-01-10 01:07:17,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:17,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:07:17,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:17,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:07:17,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:07:18,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:18,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 822 flow. Second operand has 14 states, 14 states have (on average 13.857142857142858) internal successors, (194), 14 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:18,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:18,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:18,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:19,018 INFO L124 PetriNetUnfolderBase]: 1611/3288 cut-off events. [2025-01-10 01:07:19,018 INFO L125 PetriNetUnfolderBase]: For 12420/12780 co-relation queries the response was YES. [2025-01-10 01:07:19,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12656 conditions, 3288 events. 1611/3288 cut-off events. For 12420/12780 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 21903 event pairs, 550 based on Foata normal form. 120/3329 useless extension candidates. Maximal degree in co-relation 12594. Up to 1141 conditions per place. [2025-01-10 01:07:19,039 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 181 selfloop transitions, 32 changer transitions 0/222 dead transitions. [2025-01-10 01:07:19,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 222 transitions, 2253 flow [2025-01-10 01:07:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:07:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:07:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2025-01-10 01:07:19,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2025-01-10 01:07:19,041 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 822 flow. Second operand 11 states and 205 transitions. [2025-01-10 01:07:19,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 222 transitions, 2253 flow [2025-01-10 01:07:19,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 222 transitions, 2143 flow, removed 17 selfloop flow, removed 3 redundant places. [2025-01-10 01:07:19,066 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 950 flow [2025-01-10 01:07:19,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=950, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2025-01-10 01:07:19,067 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 80 predicate places. [2025-01-10 01:07:19,067 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 950 flow [2025-01-10 01:07:19,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.857142857142858) internal successors, (194), 14 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:19,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:19,067 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-01-10 01:07:19,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-10 01:07:19,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:19,268 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:19,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1481476561, now seen corresponding path program 3 times [2025-01-10 01:07:19,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:19,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904262200] [2025-01-10 01:07:19,268 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:19,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:19,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:19,270 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:19,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-10 01:07:19,306 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-01-10 01:07:19,330 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-01-10 01:07:19,330 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-10 01:07:19,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:19,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:07:19,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:19,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:19,730 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:19,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904262200] [2025-01-10 01:07:19,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904262200] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:19,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:19,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-01-10 01:07:19,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6327400] [2025-01-10 01:07:19,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:19,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-10 01:07:19,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:19,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-10 01:07:19,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2025-01-10 01:07:19,912 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:19,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 950 flow. Second operand has 18 states, 18 states have (on average 14.666666666666666) internal successors, (264), 18 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:19,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:19,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:19,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:20,793 INFO L124 PetriNetUnfolderBase]: 1637/3113 cut-off events. [2025-01-10 01:07:20,794 INFO L125 PetriNetUnfolderBase]: For 13946/14265 co-relation queries the response was YES. [2025-01-10 01:07:20,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13372 conditions, 3113 events. 1637/3113 cut-off events. For 13946/14265 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 19502 event pairs, 862 based on Foata normal form. 64/3120 useless extension candidates. Maximal degree in co-relation 13307. Up to 1806 conditions per place. [2025-01-10 01:07:20,814 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 158 selfloop transitions, 31 changer transitions 0/198 dead transitions. [2025-01-10 01:07:20,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 198 transitions, 1881 flow [2025-01-10 01:07:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-10 01:07:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-10 01:07:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 284 transitions. [2025-01-10 01:07:20,816 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5795918367346938 [2025-01-10 01:07:20,816 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 950 flow. Second operand 14 states and 284 transitions. [2025-01-10 01:07:20,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 198 transitions, 1881 flow [2025-01-10 01:07:20,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 198 transitions, 1855 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-01-10 01:07:20,843 INFO L231 Difference]: Finished difference. Result has 125 places, 110 transitions, 984 flow [2025-01-10 01:07:20,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=984, PETRI_PLACES=125, PETRI_TRANSITIONS=110} [2025-01-10 01:07:20,845 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 89 predicate places. [2025-01-10 01:07:20,845 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 110 transitions, 984 flow [2025-01-10 01:07:20,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.666666666666666) internal successors, (264), 18 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:20,846 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:20,846 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:20,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-10 01:07:21,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:21,047 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:21,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1139779642, now seen corresponding path program 3 times [2025-01-10 01:07:21,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:21,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760858092] [2025-01-10 01:07:21,048 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:21,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:21,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:21,049 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:21,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-10 01:07:21,086 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-01-10 01:07:21,110 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:07:21,110 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-10 01:07:21,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:21,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-10 01:07:21,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:21,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:21,449 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:21,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760858092] [2025-01-10 01:07:21,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760858092] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:21,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:21,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-01-10 01:07:21,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816937082] [2025-01-10 01:07:21,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:21,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-10 01:07:21,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:21,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-10 01:07:21,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2025-01-10 01:07:21,639 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:21,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 110 transitions, 984 flow. Second operand has 18 states, 18 states have (on average 14.88888888888889) internal successors, (268), 18 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:21,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:21,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:21,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:22,418 INFO L124 PetriNetUnfolderBase]: 1603/3141 cut-off events. [2025-01-10 01:07:22,418 INFO L125 PetriNetUnfolderBase]: For 15043/15417 co-relation queries the response was YES. [2025-01-10 01:07:22,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13446 conditions, 3141 events. 1603/3141 cut-off events. For 15043/15417 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 19756 event pairs, 940 based on Foata normal form. 59/3131 useless extension candidates. Maximal degree in co-relation 13379. Up to 1900 conditions per place. [2025-01-10 01:07:22,435 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 133 selfloop transitions, 31 changer transitions 0/174 dead transitions. [2025-01-10 01:07:22,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 174 transitions, 1757 flow [2025-01-10 01:07:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-10 01:07:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-10 01:07:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 279 transitions. [2025-01-10 01:07:22,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5693877551020409 [2025-01-10 01:07:22,437 INFO L175 Difference]: Start difference. First operand has 125 places, 110 transitions, 984 flow. Second operand 14 states and 279 transitions. [2025-01-10 01:07:22,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 174 transitions, 1757 flow [2025-01-10 01:07:22,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 174 transitions, 1588 flow, removed 28 selfloop flow, removed 13 redundant places. [2025-01-10 01:07:22,459 INFO L231 Difference]: Finished difference. Result has 129 places, 114 transitions, 1013 flow [2025-01-10 01:07:22,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1013, PETRI_PLACES=129, PETRI_TRANSITIONS=114} [2025-01-10 01:07:22,460 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 93 predicate places. [2025-01-10 01:07:22,460 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 114 transitions, 1013 flow [2025-01-10 01:07:22,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.88888888888889) internal successors, (268), 18 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:22,460 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:22,461 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] [2025-01-10 01:07:22,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-01-10 01:07:22,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:22,661 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:22,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:22,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1255786025, now seen corresponding path program 1 times [2025-01-10 01:07:22,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:22,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749778519] [2025-01-10 01:07:22,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:22,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:22,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:22,665 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:22,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-10 01:07:22,700 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-10 01:07:22,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:07:22,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:22,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:22,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:22,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:22,760 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:22,760 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:22,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749778519] [2025-01-10 01:07:22,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749778519] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:22,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:22,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:07:22,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338520525] [2025-01-10 01:07:22,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:22,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:07:22,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:22,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:07:22,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:07:22,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:22,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 114 transitions, 1013 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:22,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:22,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:22,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:23,093 INFO L124 PetriNetUnfolderBase]: 1604/3213 cut-off events. [2025-01-10 01:07:23,093 INFO L125 PetriNetUnfolderBase]: For 16260/16715 co-relation queries the response was YES. [2025-01-10 01:07:23,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14078 conditions, 3213 events. 1604/3213 cut-off events. For 16260/16715 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 20830 event pairs, 647 based on Foata normal form. 14/3153 useless extension candidates. Maximal degree in co-relation 14007. Up to 1489 conditions per place. [2025-01-10 01:07:23,113 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 141 selfloop transitions, 15 changer transitions 13/179 dead transitions. [2025-01-10 01:07:23,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 1875 flow [2025-01-10 01:07:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:07:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:07:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2025-01-10 01:07:23,115 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2025-01-10 01:07:23,116 INFO L175 Difference]: Start difference. First operand has 129 places, 114 transitions, 1013 flow. Second operand 6 states and 124 transitions. [2025-01-10 01:07:23,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 1875 flow [2025-01-10 01:07:23,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 179 transitions, 1788 flow, removed 8 selfloop flow, removed 9 redundant places. [2025-01-10 01:07:23,150 INFO L231 Difference]: Finished difference. Result has 127 places, 114 transitions, 1000 flow [2025-01-10 01:07:23,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1000, PETRI_PLACES=127, PETRI_TRANSITIONS=114} [2025-01-10 01:07:23,150 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 91 predicate places. [2025-01-10 01:07:23,150 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 114 transitions, 1000 flow [2025-01-10 01:07:23,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:23,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:23,151 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] [2025-01-10 01:07:23,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:23,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:23,355 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:23,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:23,355 INFO L85 PathProgramCache]: Analyzing trace with hash 347729365, now seen corresponding path program 2 times [2025-01-10 01:07:23,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:23,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100609500] [2025-01-10 01:07:23,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:23,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:23,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:23,359 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:23,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-01-10 01:07:23,397 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-10 01:07:23,407 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-01-10 01:07:23,407 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:07:23,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:23,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:23,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:23,451 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:23,451 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:23,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100609500] [2025-01-10 01:07:23,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100609500] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:23,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:23,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:07:23,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912344928] [2025-01-10 01:07:23,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:23,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:07:23,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:23,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:07:23,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:07:23,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:23,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 114 transitions, 1000 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:23,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:23,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:23,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:23,987 INFO L124 PetriNetUnfolderBase]: 1928/3964 cut-off events. [2025-01-10 01:07:23,987 INFO L125 PetriNetUnfolderBase]: For 22266/23010 co-relation queries the response was YES. [2025-01-10 01:07:23,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17539 conditions, 3964 events. 1928/3964 cut-off events. For 22266/23010 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 27655 event pairs, 224 based on Foata normal form. 66/3964 useless extension candidates. Maximal degree in co-relation 17468. Up to 1460 conditions per place. [2025-01-10 01:07:24,009 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 209 selfloop transitions, 37 changer transitions 4/260 dead transitions. [2025-01-10 01:07:24,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 260 transitions, 2796 flow [2025-01-10 01:07:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:07:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:07:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2025-01-10 01:07:24,010 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2025-01-10 01:07:24,010 INFO L175 Difference]: Start difference. First operand has 127 places, 114 transitions, 1000 flow. Second operand 8 states and 162 transitions. [2025-01-10 01:07:24,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 260 transitions, 2796 flow [2025-01-10 01:07:24,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 260 transitions, 2670 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-01-10 01:07:24,046 INFO L231 Difference]: Finished difference. Result has 134 places, 139 transitions, 1393 flow [2025-01-10 01:07:24,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1393, PETRI_PLACES=134, PETRI_TRANSITIONS=139} [2025-01-10 01:07:24,047 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 98 predicate places. [2025-01-10 01:07:24,047 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 139 transitions, 1393 flow [2025-01-10 01:07:24,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:24,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:24,047 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] [2025-01-10 01:07:24,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-01-10 01:07:24,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:24,248 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:24,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1160407435, now seen corresponding path program 1 times [2025-01-10 01:07:24,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:24,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943279162] [2025-01-10 01:07:24,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:07:24,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:24,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:24,250 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:24,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-01-10 01:07:24,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-10 01:07:24,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:07:24,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:07:24,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:24,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:24,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:24,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:24,358 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:24,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943279162] [2025-01-10 01:07:24,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943279162] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:24,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 01:07:24,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-01-10 01:07:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733391146] [2025-01-10 01:07:24,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:24,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:07:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:24,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:07:24,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:07:24,371 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:24,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 139 transitions, 1393 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:24,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:24,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:24,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:24,850 INFO L124 PetriNetUnfolderBase]: 2406/4731 cut-off events. [2025-01-10 01:07:24,850 INFO L125 PetriNetUnfolderBase]: For 28025/28065 co-relation queries the response was YES. [2025-01-10 01:07:24,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22040 conditions, 4731 events. 2406/4731 cut-off events. For 28025/28065 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 32256 event pairs, 203 based on Foata normal form. 60/4755 useless extension candidates. Maximal degree in co-relation 21965. Up to 1578 conditions per place. [2025-01-10 01:07:24,880 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 166 selfloop transitions, 76 changer transitions 0/250 dead transitions. [2025-01-10 01:07:24,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 250 transitions, 2961 flow [2025-01-10 01:07:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 01:07:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 01:07:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2025-01-10 01:07:24,882 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-01-10 01:07:24,882 INFO L175 Difference]: Start difference. First operand has 134 places, 139 transitions, 1393 flow. Second operand 7 states and 140 transitions. [2025-01-10 01:07:24,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 250 transitions, 2961 flow [2025-01-10 01:07:24,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 250 transitions, 2916 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-01-10 01:07:24,957 INFO L231 Difference]: Finished difference. Result has 142 places, 181 transitions, 2138 flow [2025-01-10 01:07:24,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2138, PETRI_PLACES=142, PETRI_TRANSITIONS=181} [2025-01-10 01:07:24,957 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 106 predicate places. [2025-01-10 01:07:24,958 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 181 transitions, 2138 flow [2025-01-10 01:07:24,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:24,958 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:24,958 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] [2025-01-10 01:07:24,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-01-10 01:07:25,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:25,158 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:25,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:25,159 INFO L85 PathProgramCache]: Analyzing trace with hash -526811093, now seen corresponding path program 2 times [2025-01-10 01:07:25,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:25,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530360551] [2025-01-10 01:07:25,159 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:07:25,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:25,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:25,161 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:25,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-01-10 01:07:25,196 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-10 01:07:25,210 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:07:25,210 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:25,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:25,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:25,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:25,240 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:25,241 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530360551] [2025-01-10 01:07:25,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530360551] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:25,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:25,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:07:25,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484912169] [2025-01-10 01:07:25,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:25,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:07:25,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:25,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:07:25,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:07:25,257 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:25,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 181 transitions, 2138 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:25,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:25,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:25,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:25,650 INFO L124 PetriNetUnfolderBase]: 1990/4095 cut-off events. [2025-01-10 01:07:25,650 INFO L125 PetriNetUnfolderBase]: For 35215/35572 co-relation queries the response was YES. [2025-01-10 01:07:25,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21152 conditions, 4095 events. 1990/4095 cut-off events. For 35215/35572 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 29025 event pairs, 785 based on Foata normal form. 10/4037 useless extension candidates. Maximal degree in co-relation 21074. Up to 2264 conditions per place. [2025-01-10 01:07:25,679 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 193 selfloop transitions, 32 changer transitions 17/257 dead transitions. [2025-01-10 01:07:25,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 257 transitions, 3465 flow [2025-01-10 01:07:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:07:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:07:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2025-01-10 01:07:25,681 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-01-10 01:07:25,681 INFO L175 Difference]: Start difference. First operand has 142 places, 181 transitions, 2138 flow. Second operand 6 states and 120 transitions. [2025-01-10 01:07:25,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 257 transitions, 3465 flow [2025-01-10 01:07:25,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 257 transitions, 3387 flow, removed 39 selfloop flow, removed 0 redundant places. [2025-01-10 01:07:25,787 INFO L231 Difference]: Finished difference. Result has 149 places, 181 transitions, 2191 flow [2025-01-10 01:07:25,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2191, PETRI_PLACES=149, PETRI_TRANSITIONS=181} [2025-01-10 01:07:25,788 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 113 predicate places. [2025-01-10 01:07:25,788 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 181 transitions, 2191 flow [2025-01-10 01:07:25,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:25,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:25,788 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] [2025-01-10 01:07:25,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:25,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:25,989 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:25,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:25,989 INFO L85 PathProgramCache]: Analyzing trace with hash 295752025, now seen corresponding path program 3 times [2025-01-10 01:07:25,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:25,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883489468] [2025-01-10 01:07:25,989 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:25,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:25,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:25,991 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:25,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-01-10 01:07:26,026 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-01-10 01:07:26,040 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:07:26,040 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:07:26,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:26,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:26,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:26,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:26,137 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:26,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883489468] [2025-01-10 01:07:26,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883489468] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:07:26,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 01:07:26,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-01-10 01:07:26,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421034427] [2025-01-10 01:07:26,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:26,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:07:26,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:26,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:07:26,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:07:26,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:26,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 181 transitions, 2191 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:26,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:26,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:26,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:26,747 INFO L124 PetriNetUnfolderBase]: 2575/5085 cut-off events. [2025-01-10 01:07:26,747 INFO L125 PetriNetUnfolderBase]: For 43078/43102 co-relation queries the response was YES. [2025-01-10 01:07:26,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26226 conditions, 5085 events. 2575/5085 cut-off events. For 43078/43102 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 35175 event pairs, 496 based on Foata normal form. 64/5111 useless extension candidates. Maximal degree in co-relation 26144. Up to 1342 conditions per place. [2025-01-10 01:07:26,772 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 141 selfloop transitions, 124 changer transitions 0/273 dead transitions. [2025-01-10 01:07:26,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 273 transitions, 3729 flow [2025-01-10 01:07:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:07:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:07:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2025-01-10 01:07:26,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2025-01-10 01:07:26,774 INFO L175 Difference]: Start difference. First operand has 149 places, 181 transitions, 2191 flow. Second operand 6 states and 130 transitions. [2025-01-10 01:07:26,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 273 transitions, 3729 flow [2025-01-10 01:07:26,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 273 transitions, 3583 flow, removed 10 selfloop flow, removed 5 redundant places. [2025-01-10 01:07:26,854 INFO L231 Difference]: Finished difference. Result has 153 places, 222 transitions, 3188 flow [2025-01-10 01:07:26,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3188, PETRI_PLACES=153, PETRI_TRANSITIONS=222} [2025-01-10 01:07:26,855 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 117 predicate places. [2025-01-10 01:07:26,855 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 222 transitions, 3188 flow [2025-01-10 01:07:26,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:26,855 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:26,855 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] [2025-01-10 01:07:26,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-01-10 01:07:27,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:27,056 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:27,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash -152329279, now seen corresponding path program 4 times [2025-01-10 01:07:27,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:27,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896921952] [2025-01-10 01:07:27,057 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:27,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:27,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:27,058 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:27,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-01-10 01:07:27,097 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-10 01:07:27,104 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-01-10 01:07:27,104 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:07:27,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:27,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-10 01:07:27,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:27,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:27,145 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:27,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896921952] [2025-01-10 01:07:27,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896921952] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:27,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:27,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2025-01-10 01:07:27,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906328879] [2025-01-10 01:07:27,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:27,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:07:27,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:27,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:07:27,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:07:27,165 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:27,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 222 transitions, 3188 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:27,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:27,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:27,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:27,849 INFO L124 PetriNetUnfolderBase]: 2770/5473 cut-off events. [2025-01-10 01:07:27,849 INFO L125 PetriNetUnfolderBase]: For 58829/58859 co-relation queries the response was YES. [2025-01-10 01:07:27,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30532 conditions, 5473 events. 2770/5473 cut-off events. For 58829/58859 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 38457 event pairs, 641 based on Foata normal form. 82/5509 useless extension candidates. Maximal degree in co-relation 30449. Up to 1981 conditions per place. [2025-01-10 01:07:27,883 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 227 selfloop transitions, 125 changer transitions 8/368 dead transitions. [2025-01-10 01:07:27,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 368 transitions, 5632 flow [2025-01-10 01:07:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:07:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:07:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2025-01-10 01:07:27,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2025-01-10 01:07:27,884 INFO L175 Difference]: Start difference. First operand has 153 places, 222 transitions, 3188 flow. Second operand 8 states and 167 transitions. [2025-01-10 01:07:27,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 368 transitions, 5632 flow [2025-01-10 01:07:28,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 368 transitions, 5570 flow, removed 31 selfloop flow, removed 0 redundant places. [2025-01-10 01:07:28,027 INFO L231 Difference]: Finished difference. Result has 164 places, 260 transitions, 4208 flow [2025-01-10 01:07:28,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4208, PETRI_PLACES=164, PETRI_TRANSITIONS=260} [2025-01-10 01:07:28,027 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 128 predicate places. [2025-01-10 01:07:28,028 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 260 transitions, 4208 flow [2025-01-10 01:07:28,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:28,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:28,028 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] [2025-01-10 01:07:28,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-01-10 01:07:28,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:28,228 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:28,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1041512693, now seen corresponding path program 5 times [2025-01-10 01:07:28,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:28,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984135051] [2025-01-10 01:07:28,229 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:07:28,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:28,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:28,231 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:28,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-01-10 01:07:28,271 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-10 01:07:28,286 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:07:28,286 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:28,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:28,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:28,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:28,331 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:28,331 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984135051] [2025-01-10 01:07:28,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984135051] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:28,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:28,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:07:28,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656219386] [2025-01-10 01:07:28,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:28,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:07:28,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:28,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:07:28,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:07:28,350 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:28,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 260 transitions, 4208 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:28,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:28,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:28,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:28,968 INFO L124 PetriNetUnfolderBase]: 2315/4863 cut-off events. [2025-01-10 01:07:28,968 INFO L125 PetriNetUnfolderBase]: For 61297/61343 co-relation queries the response was YES. [2025-01-10 01:07:28,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28458 conditions, 4863 events. 2315/4863 cut-off events. For 61297/61343 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 35890 event pairs, 811 based on Foata normal form. 20/4787 useless extension candidates. Maximal degree in co-relation 28370. Up to 2242 conditions per place. [2025-01-10 01:07:28,998 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 173 selfloop transitions, 96 changer transitions 11/300 dead transitions. [2025-01-10 01:07:28,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 300 transitions, 5184 flow [2025-01-10 01:07:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:07:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:07:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2025-01-10 01:07:28,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-01-10 01:07:28,999 INFO L175 Difference]: Start difference. First operand has 164 places, 260 transitions, 4208 flow. Second operand 6 states and 120 transitions. [2025-01-10 01:07:28,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 300 transitions, 5184 flow [2025-01-10 01:07:29,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 300 transitions, 5025 flow, removed 55 selfloop flow, removed 2 redundant places. [2025-01-10 01:07:29,140 INFO L231 Difference]: Finished difference. Result has 168 places, 261 transitions, 4267 flow [2025-01-10 01:07:29,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4267, PETRI_PLACES=168, PETRI_TRANSITIONS=261} [2025-01-10 01:07:29,141 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 132 predicate places. [2025-01-10 01:07:29,141 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 261 transitions, 4267 flow [2025-01-10 01:07:29,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:29,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:29,141 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] [2025-01-10 01:07:29,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:29,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:29,341 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:29,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash 672538187, now seen corresponding path program 3 times [2025-01-10 01:07:29,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:29,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825652069] [2025-01-10 01:07:29,342 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:29,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:29,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:29,344 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:29,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-01-10 01:07:29,379 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-01-10 01:07:29,392 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:07:29,392 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 01:07:29,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:29,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:29,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:29,427 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:29,427 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:29,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825652069] [2025-01-10 01:07:29,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825652069] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:29,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:29,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:07:29,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340869953] [2025-01-10 01:07:29,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:29,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:07:29,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:29,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:07:29,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:07:29,447 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:29,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 261 transitions, 4267 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:29,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:29,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:29,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:30,102 INFO L124 PetriNetUnfolderBase]: 2409/5017 cut-off events. [2025-01-10 01:07:30,102 INFO L125 PetriNetUnfolderBase]: For 62540/62594 co-relation queries the response was YES. [2025-01-10 01:07:30,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29036 conditions, 5017 events. 2409/5017 cut-off events. For 62540/62594 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 36651 event pairs, 776 based on Foata normal form. 20/4985 useless extension candidates. Maximal degree in co-relation 28947. Up to 2190 conditions per place. [2025-01-10 01:07:30,143 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 182 selfloop transitions, 95 changer transitions 4/296 dead transitions. [2025-01-10 01:07:30,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 296 transitions, 5111 flow [2025-01-10 01:07:30,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:07:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:07:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2025-01-10 01:07:30,144 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2025-01-10 01:07:30,144 INFO L175 Difference]: Start difference. First operand has 168 places, 261 transitions, 4267 flow. Second operand 6 states and 121 transitions. [2025-01-10 01:07:30,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 296 transitions, 5111 flow [2025-01-10 01:07:30,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 296 transitions, 4790 flow, removed 24 selfloop flow, removed 7 redundant places. [2025-01-10 01:07:30,321 INFO L231 Difference]: Finished difference. Result has 166 places, 260 transitions, 4138 flow [2025-01-10 01:07:30,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4138, PETRI_PLACES=166, PETRI_TRANSITIONS=260} [2025-01-10 01:07:30,321 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 130 predicate places. [2025-01-10 01:07:30,321 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 260 transitions, 4138 flow [2025-01-10 01:07:30,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:30,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:30,322 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] [2025-01-10 01:07:30,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-01-10 01:07:30,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:30,522 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:30,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:30,522 INFO L85 PathProgramCache]: Analyzing trace with hash 960375505, now seen corresponding path program 4 times [2025-01-10 01:07:30,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:30,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305242736] [2025-01-10 01:07:30,523 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:30,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:30,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:30,524 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:30,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-01-10 01:07:30,561 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-10 01:07:30,568 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-01-10 01:07:30,568 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:07:30,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:30,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-10 01:07:30,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:30,586 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:30,586 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:30,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305242736] [2025-01-10 01:07:30,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305242736] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:30,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:30,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:07:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019651120] [2025-01-10 01:07:30,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:30,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:07:30,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:30,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:07:30,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:07:30,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:30,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 260 transitions, 4138 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:30,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:30,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:30,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:31,410 INFO L124 PetriNetUnfolderBase]: 2754/5437 cut-off events. [2025-01-10 01:07:31,410 INFO L125 PetriNetUnfolderBase]: For 62098/62138 co-relation queries the response was YES. [2025-01-10 01:07:31,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30681 conditions, 5437 events. 2754/5437 cut-off events. For 62098/62138 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 38111 event pairs, 981 based on Foata normal form. 16/5403 useless extension candidates. Maximal degree in co-relation 30596. Up to 2577 conditions per place. [2025-01-10 01:07:31,458 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 200 selfloop transitions, 94 changer transitions 0/302 dead transitions. [2025-01-10 01:07:31,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 302 transitions, 4994 flow [2025-01-10 01:07:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:07:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:07:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2025-01-10 01:07:31,459 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2025-01-10 01:07:31,459 INFO L175 Difference]: Start difference. First operand has 166 places, 260 transitions, 4138 flow. Second operand 6 states and 125 transitions. [2025-01-10 01:07:31,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 302 transitions, 4994 flow [2025-01-10 01:07:31,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 302 transitions, 4810 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-01-10 01:07:31,616 INFO L231 Difference]: Finished difference. Result has 166 places, 256 transitions, 4065 flow [2025-01-10 01:07:31,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4065, PETRI_PLACES=166, PETRI_TRANSITIONS=256} [2025-01-10 01:07:31,617 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 130 predicate places. [2025-01-10 01:07:31,617 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 256 transitions, 4065 flow [2025-01-10 01:07:31,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:31,617 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:31,617 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] [2025-01-10 01:07:31,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-01-10 01:07:31,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:31,817 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:31,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:31,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1209705975, now seen corresponding path program 6 times [2025-01-10 01:07:31,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:31,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334442732] [2025-01-10 01:07:31,818 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:07:31,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:31,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:31,820 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:31,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-01-10 01:07:31,854 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-01-10 01:07:31,868 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:07:31,868 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-10 01:07:31,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:31,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:31,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:31,929 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:31,929 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:31,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334442732] [2025-01-10 01:07:31,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334442732] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:31,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:31,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:07:31,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389598687] [2025-01-10 01:07:31,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:31,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:07:31,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:31,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:07:31,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:07:31,952 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:31,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 256 transitions, 4065 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:31,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:31,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:31,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:32,465 INFO L124 PetriNetUnfolderBase]: 2307/4716 cut-off events. [2025-01-10 01:07:32,465 INFO L125 PetriNetUnfolderBase]: For 61460/61616 co-relation queries the response was YES. [2025-01-10 01:07:32,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27374 conditions, 4716 events. 2307/4716 cut-off events. For 61460/61616 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 33941 event pairs, 797 based on Foata normal form. 16/4641 useless extension candidates. Maximal degree in co-relation 27290. Up to 2488 conditions per place. [2025-01-10 01:07:32,500 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 188 selfloop transitions, 82 changer transitions 4/294 dead transitions. [2025-01-10 01:07:32,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 294 transitions, 4917 flow [2025-01-10 01:07:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:07:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:07:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2025-01-10 01:07:32,501 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-01-10 01:07:32,501 INFO L175 Difference]: Start difference. First operand has 166 places, 256 transitions, 4065 flow. Second operand 6 states and 117 transitions. [2025-01-10 01:07:32,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 294 transitions, 4917 flow [2025-01-10 01:07:32,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 294 transitions, 4717 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-01-10 01:07:32,643 INFO L231 Difference]: Finished difference. Result has 168 places, 253 transitions, 3992 flow [2025-01-10 01:07:32,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3865, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3992, PETRI_PLACES=168, PETRI_TRANSITIONS=253} [2025-01-10 01:07:32,644 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 132 predicate places. [2025-01-10 01:07:32,644 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 253 transitions, 3992 flow [2025-01-10 01:07:32,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:32,644 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:32,644 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] [2025-01-10 01:07:32,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-01-10 01:07:32,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:32,845 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:32,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1753365039, now seen corresponding path program 5 times [2025-01-10 01:07:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251055731] [2025-01-10 01:07:32,845 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:07:32,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:32,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:32,847 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:32,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-01-10 01:07:32,883 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-10 01:07:32,895 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:07:32,895 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:07:32,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:32,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:07:32,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:07:32,942 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:07:32,942 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:32,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251055731] [2025-01-10 01:07:32,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251055731] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:07:32,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:07:32,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:07:32,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491209087] [2025-01-10 01:07:32,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:07:32,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:07:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:32,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:07:32,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:07:32,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:32,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 253 transitions, 3992 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:32,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:32,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:32,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:33,514 INFO L124 PetriNetUnfolderBase]: 2348/4748 cut-off events. [2025-01-10 01:07:33,514 INFO L125 PetriNetUnfolderBase]: For 57896/57950 co-relation queries the response was YES. [2025-01-10 01:07:33,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27266 conditions, 4748 events. 2348/4748 cut-off events. For 57896/57950 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 33203 event pairs, 872 based on Foata normal form. 20/4722 useless extension candidates. Maximal degree in co-relation 27181. Up to 2308 conditions per place. [2025-01-10 01:07:33,546 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 186 selfloop transitions, 78 changer transitions 6/288 dead transitions. [2025-01-10 01:07:33,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 288 transitions, 4796 flow [2025-01-10 01:07:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:07:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:07:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2025-01-10 01:07:33,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-01-10 01:07:33,547 INFO L175 Difference]: Start difference. First operand has 168 places, 253 transitions, 3992 flow. Second operand 6 states and 117 transitions. [2025-01-10 01:07:33,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 288 transitions, 4796 flow [2025-01-10 01:07:33,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 288 transitions, 4630 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-01-10 01:07:33,667 INFO L231 Difference]: Finished difference. Result has 167 places, 249 transitions, 3890 flow [2025-01-10 01:07:33,667 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3826, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3890, PETRI_PLACES=167, PETRI_TRANSITIONS=249} [2025-01-10 01:07:33,667 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 131 predicate places. [2025-01-10 01:07:33,667 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 249 transitions, 3890 flow [2025-01-10 01:07:33,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:33,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:33,667 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2025-01-10 01:07:33,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-01-10 01:07:33,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:33,871 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:33,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:33,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1554952644, now seen corresponding path program 4 times [2025-01-10 01:07:33,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:33,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373363411] [2025-01-10 01:07:33,872 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:33,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:33,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:33,873 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:33,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-01-10 01:07:33,908 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-10 01:07:33,939 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-10 01:07:33,939 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:07:33,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:33,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:07:33,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:33,949 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 7 [2025-01-10 01:07:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:34,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:35,143 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:35,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373363411] [2025-01-10 01:07:35,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373363411] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:35,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:35,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2025-01-10 01:07:35,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243314318] [2025-01-10 01:07:35,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:35,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-10 01:07:35,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:35,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-10 01:07:35,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-01-10 01:07:36,435 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:36,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 249 transitions, 3890 flow. Second operand has 21 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:36,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:36,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:36,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:40,432 INFO L124 PetriNetUnfolderBase]: 3449/7073 cut-off events. [2025-01-10 01:07:40,432 INFO L125 PetriNetUnfolderBase]: For 94570/94693 co-relation queries the response was YES. [2025-01-10 01:07:40,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40431 conditions, 7073 events. 3449/7073 cut-off events. For 94570/94693 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 52285 event pairs, 601 based on Foata normal form. 162/7124 useless extension candidates. Maximal degree in co-relation 40345. Up to 1737 conditions per place. [2025-01-10 01:07:40,491 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 355 selfloop transitions, 136 changer transitions 0/519 dead transitions. [2025-01-10 01:07:40,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 519 transitions, 8264 flow [2025-01-10 01:07:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-10 01:07:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-01-10 01:07:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 507 transitions. [2025-01-10 01:07:40,493 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-01-10 01:07:40,493 INFO L175 Difference]: Start difference. First operand has 167 places, 249 transitions, 3890 flow. Second operand 26 states and 507 transitions. [2025-01-10 01:07:40,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 519 transitions, 8264 flow [2025-01-10 01:07:40,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 519 transitions, 7984 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-01-10 01:07:40,741 INFO L231 Difference]: Finished difference. Result has 194 places, 291 transitions, 4796 flow [2025-01-10 01:07:40,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4796, PETRI_PLACES=194, PETRI_TRANSITIONS=291} [2025-01-10 01:07:40,742 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 158 predicate places. [2025-01-10 01:07:40,742 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 291 transitions, 4796 flow [2025-01-10 01:07:40,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:40,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:40,742 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:40,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-01-10 01:07:40,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:40,943 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:40,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:40,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1787536546, now seen corresponding path program 5 times [2025-01-10 01:07:40,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:40,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40516417] [2025-01-10 01:07:40,944 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:07:40,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:40,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:40,946 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:40,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-01-10 01:07:40,982 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 7 equivalence classes. [2025-01-10 01:07:41,043 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:41,043 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-01-10 01:07:41,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:41,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:07:41,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:41,057 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 7 [2025-01-10 01:07:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-10 01:07:41,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-10 01:07:41,699 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:41,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40516417] [2025-01-10 01:07:41,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40516417] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:41,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:41,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2025-01-10 01:07:41,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418638284] [2025-01-10 01:07:41,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:41,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:07:41,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:41,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:07:41,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:07:42,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:42,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 291 transitions, 4796 flow. Second operand has 16 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:42,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:42,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:42,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:44,637 INFO L124 PetriNetUnfolderBase]: 3581/7340 cut-off events. [2025-01-10 01:07:44,637 INFO L125 PetriNetUnfolderBase]: For 116678/116837 co-relation queries the response was YES. [2025-01-10 01:07:44,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44827 conditions, 7340 events. 3581/7340 cut-off events. For 116678/116837 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 54478 event pairs, 697 based on Foata normal form. 107/7299 useless extension candidates. Maximal degree in co-relation 44731. Up to 1855 conditions per place. [2025-01-10 01:07:44,696 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 240 selfloop transitions, 129 changer transitions 0/397 dead transitions. [2025-01-10 01:07:44,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 397 transitions, 6585 flow [2025-01-10 01:07:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-10 01:07:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-01-10 01:07:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 323 transitions. [2025-01-10 01:07:44,697 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-01-10 01:07:44,697 INFO L175 Difference]: Start difference. First operand has 194 places, 291 transitions, 4796 flow. Second operand 17 states and 323 transitions. [2025-01-10 01:07:44,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 397 transitions, 6585 flow [2025-01-10 01:07:45,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 397 transitions, 6423 flow, removed 64 selfloop flow, removed 9 redundant places. [2025-01-10 01:07:45,025 INFO L231 Difference]: Finished difference. Result has 204 places, 296 transitions, 5113 flow [2025-01-10 01:07:45,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4638, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5113, PETRI_PLACES=204, PETRI_TRANSITIONS=296} [2025-01-10 01:07:45,026 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 168 predicate places. [2025-01-10 01:07:45,026 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 296 transitions, 5113 flow [2025-01-10 01:07:45,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:45,026 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:45,026 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:07:45,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-01-10 01:07:45,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:45,227 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:45,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:45,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1429515633, now seen corresponding path program 4 times [2025-01-10 01:07:45,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:45,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170239195] [2025-01-10 01:07:45,227 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:07:45,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:45,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:45,230 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:45,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-01-10 01:07:45,266 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-01-10 01:07:45,294 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:07:45,294 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 01:07:45,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:45,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:07:45,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:45,302 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 7 [2025-01-10 01:07:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:45,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:46,490 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:46,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170239195] [2025-01-10 01:07:46,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170239195] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:46,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:46,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2025-01-10 01:07:46,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288700494] [2025-01-10 01:07:46,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:46,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-10 01:07:46,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:46,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-10 01:07:46,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-01-10 01:07:47,584 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-01-10 01:07:47,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 296 transitions, 5113 flow. Second operand has 21 states, 21 states have (on average 13.619047619047619) internal successors, (286), 21 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:47,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:47,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-01-10 01:07:47,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:07:52,205 INFO L124 PetriNetUnfolderBase]: 4991/10008 cut-off events. [2025-01-10 01:07:52,205 INFO L125 PetriNetUnfolderBase]: For 156173/156361 co-relation queries the response was YES. [2025-01-10 01:07:52,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62035 conditions, 10008 events. 4991/10008 cut-off events. For 156173/156361 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 73318 event pairs, 1081 based on Foata normal form. 207/10062 useless extension candidates. Maximal degree in co-relation 61936. Up to 2604 conditions per place. [2025-01-10 01:07:52,318 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 539 selfloop transitions, 149 changer transitions 0/717 dead transitions. [2025-01-10 01:07:52,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 717 transitions, 13034 flow [2025-01-10 01:07:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-10 01:07:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-01-10 01:07:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 493 transitions. [2025-01-10 01:07:52,320 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5417582417582417 [2025-01-10 01:07:52,320 INFO L175 Difference]: Start difference. First operand has 204 places, 296 transitions, 5113 flow. Second operand 26 states and 493 transitions. [2025-01-10 01:07:52,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 717 transitions, 13034 flow [2025-01-10 01:07:52,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 717 transitions, 12802 flow, removed 44 selfloop flow, removed 11 redundant places. [2025-01-10 01:07:52,860 INFO L231 Difference]: Finished difference. Result has 226 places, 355 transitions, 6332 flow [2025-01-10 01:07:52,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5011, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6332, PETRI_PLACES=226, PETRI_TRANSITIONS=355} [2025-01-10 01:07:52,860 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 190 predicate places. [2025-01-10 01:07:52,860 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 355 transitions, 6332 flow [2025-01-10 01:07:52,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.619047619047619) internal successors, (286), 21 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:52,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:07:52,861 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2025-01-10 01:07:52,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-01-10 01:07:53,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:53,061 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:07:53,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:07:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash -55003100, now seen corresponding path program 3 times [2025-01-10 01:07:53,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:07:53,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805628279] [2025-01-10 01:07:53,062 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:07:53,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:07:53,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:07:53,064 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:07:53,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-01-10 01:07:53,100 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 11 equivalence classes. [2025-01-10 01:07:53,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 23 of 23 statements. [2025-01-10 01:07:53,380 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-01-10 01:07:53,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:07:53,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-10 01:07:53,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:07:53,392 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 7 [2025-01-10 01:07:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:53,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:07:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:07:55,175 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 01:07:55,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805628279] [2025-01-10 01:07:55,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805628279] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:07:55,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:07:55,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2025-01-10 01:07:55,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138474424] [2025-01-10 01:07:55,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 01:07:55,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-10 01:07:55,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 01:07:55,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-10 01:07:55,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2025-01-10 01:07:56,135 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-01-10 01:07:56,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 355 transitions, 6332 flow. Second operand has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:07:56,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:07:56,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-01-10 01:07:56,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:08:08,795 INFO L124 PetriNetUnfolderBase]: 4810/9615 cut-off events. [2025-01-10 01:08:08,795 INFO L125 PetriNetUnfolderBase]: For 169792/170060 co-relation queries the response was YES. [2025-01-10 01:08:08,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63165 conditions, 9615 events. 4810/9615 cut-off events. For 169792/170060 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 70455 event pairs, 2273 based on Foata normal form. 14/9457 useless extension candidates. Maximal degree in co-relation 62770. Up to 6465 conditions per place. [2025-01-10 01:08:08,892 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 294 selfloop transitions, 66 changer transitions 0/391 dead transitions. [2025-01-10 01:08:08,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 391 transitions, 7556 flow [2025-01-10 01:08:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-01-10 01:08:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-01-10 01:08:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 695 transitions. [2025-01-10 01:08:08,894 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43167701863354035 [2025-01-10 01:08:08,895 INFO L175 Difference]: Start difference. First operand has 226 places, 355 transitions, 6332 flow. Second operand 46 states and 695 transitions. [2025-01-10 01:08:08,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 391 transitions, 7556 flow [2025-01-10 01:08:09,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 391 transitions, 7408 flow, removed 37 selfloop flow, removed 11 redundant places. [2025-01-10 01:08:09,323 INFO L231 Difference]: Finished difference. Result has 272 places, 391 transitions, 6874 flow [2025-01-10 01:08:09,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6208, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=6874, PETRI_PLACES=272, PETRI_TRANSITIONS=391} [2025-01-10 01:08:09,323 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 236 predicate places. [2025-01-10 01:08:09,323 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 391 transitions, 6874 flow [2025-01-10 01:08:09,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:08:09,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:08:09,323 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:08:09,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-01-10 01:08:09,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:08:09,524 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-10 01:08:09,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:08:09,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1550159744, now seen corresponding path program 1 times [2025-01-10 01:08:09,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 01:08:09,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203320656] [2025-01-10 01:08:09,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:08:09,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:08:09,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:08:09,526 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:08:09,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-01-10 01:08:09,566 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 01:08:09,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 01:08:09,582 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:08:09,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-10 01:08:09,582 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-10 01:08:09,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 01:08:09,605 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 01:08:09,605 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:08:09,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-10 01:08:09,636 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-01-10 01:08:09,636 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-10 01:08:09,637 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2025-01-10 01:08:09,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2025-01-10 01:08:09,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-01-10 01:08:09,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:08:09,839 INFO L422 BasicCegarLoop]: Path program histogram: [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:08:09,871 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-01-10 01:08:09,872 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-01-10 01:08:09,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 01:08:09 BasicIcfg [2025-01-10 01:08:09,876 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-01-10 01:08:09,877 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-01-10 01:08:09,877 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-01-10 01:08:09,877 INFO L274 PluginConnector]: Witness Printer initialized [2025-01-10 01:08:09,877 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:07:01" (3/4) ... [2025-01-10 01:08:09,878 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-01-10 01:08:09,879 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-01-10 01:08:09,880 INFO L158 Benchmark]: Toolchain (without parser) took 69610.11ms. Allocated memory was 83.9MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 59.6MB in the beginning and 531.7MB in the end (delta: -472.1MB). Peak memory consumption was 995.0MB. Max. memory is 16.1GB. [2025-01-10 01:08:09,880 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 83.9MB. Free memory was 62.3MB in the beginning and 62.3MB in the end (delta: 33.6kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 01:08:09,880 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.07ms. Allocated memory is still 83.9MB. Free memory was 59.3MB in the beginning and 47.1MB in the end (delta: 12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-01-10 01:08:09,881 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.94ms. Allocated memory is still 83.9MB. Free memory was 47.1MB in the beginning and 45.3MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-01-10 01:08:09,881 INFO L158 Benchmark]: Boogie Preprocessor took 46.24ms. Allocated memory is still 83.9MB. Free memory was 45.3MB in the beginning and 43.2MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 01:08:09,881 INFO L158 Benchmark]: RCFGBuilder took 569.69ms. Allocated memory is still 83.9MB. Free memory was 43.2MB in the beginning and 25.0MB in the end (delta: 18.3MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. [2025-01-10 01:08:09,882 INFO L158 Benchmark]: TraceAbstraction took 68756.03ms. Allocated memory was 83.9MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 24.5MB in the beginning and 531.8MB in the end (delta: -507.3MB). Peak memory consumption was 957.5MB. Max. memory is 16.1GB. [2025-01-10 01:08:09,882 INFO L158 Benchmark]: Witness Printer took 2.31ms. Allocated memory is still 1.6GB. Free memory was 531.8MB in the beginning and 531.7MB in the end (delta: 89.3kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 01:08:09,883 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 83.9MB. Free memory was 62.3MB in the beginning and 62.3MB in the end (delta: 33.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.07ms. Allocated memory is still 83.9MB. Free memory was 59.3MB in the beginning and 47.1MB in the end (delta: 12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.94ms. Allocated memory is still 83.9MB. Free memory was 47.1MB in the beginning and 45.3MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.24ms. Allocated memory is still 83.9MB. Free memory was 45.3MB in the beginning and 43.2MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 569.69ms. Allocated memory is still 83.9MB. Free memory was 43.2MB in the beginning and 25.0MB in the end (delta: 18.3MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. * TraceAbstraction took 68756.03ms. Allocated memory was 83.9MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 24.5MB in the beginning and 531.8MB in the end (delta: -507.3MB). Peak memory consumption was 957.5MB. Max. memory is 16.1GB. * Witness Printer took 2.31ms. Allocated memory is still 1.6GB. Free memory was 531.8MB in the beginning and 531.7MB in the end (delta: 89.3kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L39] 0 int* A; [L40] 0 _Atomic int counter; [L41] 0 int N; [L66] 0 pthread_t t1, t2; [L68] 0 N = __VERIFIER_nondet_int() [L69] CALL, EXPR 0 create_fresh_int_array(N) [L84] CALL 0 assume_abort_if_not(size >= 0) [L36] COND FALSE 0 !(!cond) [L84] RET 0 assume_abort_if_not(size >= 0) [L85] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L36] COND FALSE 0 !(!cond) [L85] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L87] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L88] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=0, size=1] [L88] COND TRUE 0 i < size [L89] 0 arr[i] = __VERIFIER_nondet_int() [L88] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=1, size=1] [L88] COND FALSE 0 !(i < size) [L91] 0 return arr; [L69] RET, EXPR 0 create_fresh_int_array(N) [L69] 0 A = create_fresh_int_array(N) [L72] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={3:0}, N=1, counter=0, t1=-1] [L48] 1 int i=0; VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L48] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L36] COND FALSE 1 !(!cond) [L101] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L102] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L36] COND FALSE 1 !(!cond) [L102] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L103] 1 return a + b; [L49] RET, EXPR 1 plus(counter, A[i]) [L49] 1 int tmp = plus(counter, A[i]); [L73] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={3:0}, N=1, counter=0, t1=-1, t2=0] [L57] 2 int i=0; VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L57] COND TRUE 2 i= b - 2147483648) [L36] COND FALSE 2 !(!cond) [L95] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L96] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L36] COND FALSE 2 !(!cond) [L96] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L97] 2 return a - b; [L58] RET, EXPR 2 minus(counter, A[i]) [L58] 2 int tmp = minus(counter, A[i]); [L50] 1 counter = tmp VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=1, i=0, tmp=1] [L59] 2 counter = tmp VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-1, i=0, tmp=-1] [L57] 2 i++ VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-1, i=1] [L48] 1 i++ VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-1, i=1] [L48] COND FALSE 1 !(i