./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-send-receive-alt.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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:11:23,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:11:23,601 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:11:23,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:11:23,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:11:23,621 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:11:23,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:11:23,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:11:23,621 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:11:23,622 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:11:23,622 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:11:23,622 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:11:23,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:11:23,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:11:23,622 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:11:23,622 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:11:23,622 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:11:23,622 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:11:23,623 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:11:23,624 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:11:23,624 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:11:23,624 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:11:23,624 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:11:23,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:11:23,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:11:23,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:11:23,624 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:11:23,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:11:23,624 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:11:23,625 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:11:23,625 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:11:23,625 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:11:23,625 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 -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2025-02-06 13:11:23,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:11:23,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:11:23,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:11:23,817 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:11:23,817 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:11:23,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2025-02-06 13:11:24,921 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ebdb6c941/f570e44121ec4a35bff2cf3a4f8890eb/FLAGde37bf812 [2025-02-06 13:11:25,178 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:11:25,178 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2025-02-06 13:11:25,184 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ebdb6c941/f570e44121ec4a35bff2cf3a4f8890eb/FLAGde37bf812 [2025-02-06 13:11:25,506 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ebdb6c941/f570e44121ec4a35bff2cf3a4f8890eb [2025-02-06 13:11:25,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:11:25,509 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:11:25,510 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:11:25,510 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:11:25,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:11:25,513 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,513 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a1a9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25, skipping insertion in model container [2025-02-06 13:11:25,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,524 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:11:25,646 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:11:25,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:11:25,657 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:11:25,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:11:25,688 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:11:25,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25 WrapperNode [2025-02-06 13:11:25,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:11:25,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:11:25,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:11:25,690 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:11:25,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,699 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,717 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 136 [2025-02-06 13:11:25,720 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:11:25,720 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:11:25,720 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:11:25,720 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:11:25,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,727 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,743 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 13:11:25,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,746 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,753 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,757 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,759 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:11:25,764 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:11:25,764 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:11:25,764 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:11:25,765 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (1/1) ... [2025-02-06 13:11:25,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:11:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:25,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:11:25,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:11:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:11:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:11:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:11:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:11:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:11:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:11:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:11:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:11:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:11:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:11:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:11:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:11:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:11:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:11:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:11:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:11:25,819 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:11:25,912 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:11:25,914 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:11:26,179 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:11:26,179 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:11:26,339 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:11:26,339 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:11:26,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:11:26 BoogieIcfgContainer [2025-02-06 13:11:26,340 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:11:26,341 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:11:26,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:11:26,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:11:26,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:11:25" (1/3) ... [2025-02-06 13:11:26,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee359d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:11:26, skipping insertion in model container [2025-02-06 13:11:26,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:25" (2/3) ... [2025-02-06 13:11:26,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee359d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:11:26, skipping insertion in model container [2025-02-06 13:11:26,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:11:26" (3/3) ... [2025-02-06 13:11:26,346 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2025-02-06 13:11:26,356 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:11:26,358 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive-alt.wvr.c that has 3 procedures, 38 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2025-02-06 13:11:26,358 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:11:26,419 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:11:26,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 100 flow [2025-02-06 13:11:26,480 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2025-02-06 13:11:26,483 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:11:26,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 6/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-02-06 13:11:26,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 100 flow [2025-02-06 13:11:26,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 92 flow [2025-02-06 13:11:26,497 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:11:26,505 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;@6e33db68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:11:26,505 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-02-06 13:11:26,507 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:11:26,507 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:11:26,508 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:11:26,508 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:26,508 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:11:26,508 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:26,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:26,515 INFO L85 PathProgramCache]: Analyzing trace with hash 383345, now seen corresponding path program 1 times [2025-02-06 13:11:26,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:26,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272982243] [2025-02-06 13:11:26,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:26,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:26,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:11:26,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:11:26,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:26,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:26,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:26,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272982243] [2025-02-06 13:11:26,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272982243] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:26,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:26,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:11:26,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982934153] [2025-02-06 13:11:26,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:26,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:11:26,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:26,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:11:26,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:11:26,698 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-02-06 13:11:26,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:26,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:26,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-02-06 13:11:26,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:26,826 INFO L124 PetriNetUnfolderBase]: 308/550 cut-off events. [2025-02-06 13:11:26,827 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-02-06 13:11:26,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 550 events. 308/550 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2440 event pairs, 250 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1005. Up to 497 conditions per place. [2025-02-06 13:11:26,831 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2025-02-06 13:11:26,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 140 flow [2025-02-06 13:11:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:11:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:11:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2025-02-06 13:11:26,839 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2025-02-06 13:11:26,840 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 92 flow. Second operand 3 states and 60 transitions. [2025-02-06 13:11:26,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 140 flow [2025-02-06 13:11:26,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:11:26,844 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2025-02-06 13:11:26,845 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2025-02-06 13:11:26,847 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2025-02-06 13:11:26,847 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2025-02-06 13:11:26,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:26,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:26,847 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:11:26,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:11:26,848 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:26,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash 383346, now seen corresponding path program 1 times [2025-02-06 13:11:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:26,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124100459] [2025-02-06 13:11:26,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:26,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:26,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:11:26,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:11:26,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:26,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:27,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:27,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124100459] [2025-02-06 13:11:27,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124100459] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:27,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:27,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:11:27,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572742464] [2025-02-06 13:11:27,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:27,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:27,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:27,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:27,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:27,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-02-06 13:11:27,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:27,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:27,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-02-06 13:11:27,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:27,173 INFO L124 PetriNetUnfolderBase]: 309/553 cut-off events. [2025-02-06 13:11:27,173 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 13:11:27,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 553 events. 309/553 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2447 event pairs, 250 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1049. Up to 502 conditions per place. [2025-02-06 13:11:27,176 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2025-02-06 13:11:27,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 152 flow [2025-02-06 13:11:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2025-02-06 13:11:27,178 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2025-02-06 13:11:27,178 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 70 transitions. [2025-02-06 13:11:27,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 152 flow [2025-02-06 13:11:27,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:27,179 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2025-02-06 13:11:27,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2025-02-06 13:11:27,180 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2025-02-06 13:11:27,180 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2025-02-06 13:11:27,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:27,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:27,180 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:11:27,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:11:27,180 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:27,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash 368407906, now seen corresponding path program 1 times [2025-02-06 13:11:27,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:27,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760322394] [2025-02-06 13:11:27,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:27,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:27,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:11:27,206 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:11:27,206 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:27,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:27,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:27,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760322394] [2025-02-06 13:11:27,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760322394] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939638601] [2025-02-06 13:11:27,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:27,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:27,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:27,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:27,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:11:27,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:11:27,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:11:27,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:27,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:27,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:11:27,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:27,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:11:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:27,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:27,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939638601] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:27,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:27,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:11:27,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943354415] [2025-02-06 13:11:27,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:27,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:11:27,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:27,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:11:27,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:11:27,998 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-02-06 13:11:27,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:27,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:27,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-02-06 13:11:27,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:28,170 INFO L124 PetriNetUnfolderBase]: 310/555 cut-off events. [2025-02-06 13:11:28,171 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 13:11:28,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 555 events. 310/555 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2445 event pairs, 250 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 1056. Up to 499 conditions per place. [2025-02-06 13:11:28,174 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 25 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2025-02-06 13:11:28,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 179 flow [2025-02-06 13:11:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:11:28,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:11:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2025-02-06 13:11:28,177 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3168604651162791 [2025-02-06 13:11:28,177 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 8 states and 109 transitions. [2025-02-06 13:11:28,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 179 flow [2025-02-06 13:11:28,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:11:28,178 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 126 flow [2025-02-06 13:11:28,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2025-02-06 13:11:28,179 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2025-02-06 13:11:28,179 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 126 flow [2025-02-06 13:11:28,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:28,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:28,180 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:28,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 13:11:28,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:28,381 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:28,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1909659701, now seen corresponding path program 1 times [2025-02-06 13:11:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:28,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911383377] [2025-02-06 13:11:28,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:28,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:28,393 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:11:28,399 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:11:28,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:28,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:28,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:28,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911383377] [2025-02-06 13:11:28,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911383377] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:28,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:28,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:11:28,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903536336] [2025-02-06 13:11:28,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:28,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:11:28,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:28,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:11:28,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:11:28,444 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:28,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:28,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:28,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:28,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:28,601 INFO L124 PetriNetUnfolderBase]: 405/745 cut-off events. [2025-02-06 13:11:28,601 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-02-06 13:11:28,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1466 conditions, 745 events. 405/745 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3454 event pairs, 186 based on Foata normal form. 22/527 useless extension candidates. Maximal degree in co-relation 1428. Up to 420 conditions per place. [2025-02-06 13:11:28,608 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 50 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2025-02-06 13:11:28,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 270 flow [2025-02-06 13:11:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:11:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:11:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2025-02-06 13:11:28,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2025-02-06 13:11:28,609 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 126 flow. Second operand 3 states and 80 transitions. [2025-02-06 13:11:28,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 270 flow [2025-02-06 13:11:28,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 228 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-02-06 13:11:28,610 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 107 flow [2025-02-06 13:11:28,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2025-02-06 13:11:28,610 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2025-02-06 13:11:28,610 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 107 flow [2025-02-06 13:11:28,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:28,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:28,611 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:28,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:11:28,611 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:28,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:28,611 INFO L85 PathProgramCache]: Analyzing trace with hash -456551036, now seen corresponding path program 1 times [2025-02-06 13:11:28,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:28,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631532765] [2025-02-06 13:11:28,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:28,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:28,623 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:11:28,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:11:28,629 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:28,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:28,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:28,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631532765] [2025-02-06 13:11:28,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631532765] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:28,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:28,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:11:28,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261749671] [2025-02-06 13:11:28,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:28,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:28,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:28,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:28,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:28,703 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-02-06 13:11:28,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:28,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:28,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-02-06 13:11:28,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:28,770 INFO L124 PetriNetUnfolderBase]: 304/571 cut-off events. [2025-02-06 13:11:28,770 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2025-02-06 13:11:28,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 571 events. 304/571 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2462 event pairs, 246 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 466. Up to 511 conditions per place. [2025-02-06 13:11:28,772 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 30 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2025-02-06 13:11:28,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 167 flow [2025-02-06 13:11:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2025-02-06 13:11:28,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2025-02-06 13:11:28,774 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 107 flow. Second operand 4 states and 65 transitions. [2025-02-06 13:11:28,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 167 flow [2025-02-06 13:11:28,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:11:28,775 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 104 flow [2025-02-06 13:11:28,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2025-02-06 13:11:28,775 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2025-02-06 13:11:28,775 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 104 flow [2025-02-06 13:11:28,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:28,776 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:28,776 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:28,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:11:28,776 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:28,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash -456551035, now seen corresponding path program 1 times [2025-02-06 13:11:28,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:28,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002990986] [2025-02-06 13:11:28,776 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:28,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:28,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:11:28,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:11:28,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:28,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:28,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:28,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002990986] [2025-02-06 13:11:28,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002990986] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:28,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:28,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:28,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370768938] [2025-02-06 13:11:28,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:28,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:28,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:28,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:28,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:28,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:28,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 104 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) [2025-02-06 13:11:28,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:28,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:28,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:28,926 INFO L124 PetriNetUnfolderBase]: 371/708 cut-off events. [2025-02-06 13:11:28,926 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2025-02-06 13:11:28,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 708 events. 371/708 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3160 event pairs, 314 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 1155. Up to 516 conditions per place. [2025-02-06 13:11:28,929 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 45 selfloop transitions, 3 changer transitions 1/54 dead transitions. [2025-02-06 13:11:28,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 236 flow [2025-02-06 13:11:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2025-02-06 13:11:28,930 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2025-02-06 13:11:28,930 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 104 flow. Second operand 4 states and 85 transitions. [2025-02-06 13:11:28,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 236 flow [2025-02-06 13:11:28,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:28,931 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 108 flow [2025-02-06 13:11:28,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2025-02-06 13:11:28,932 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2025-02-06 13:11:28,932 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 108 flow [2025-02-06 13:11:28,932 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) [2025-02-06 13:11:28,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:28,932 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:28,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:11:28,933 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:28,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash -851465323, now seen corresponding path program 1 times [2025-02-06 13:11:28,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:28,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250536908] [2025-02-06 13:11:28,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:28,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:28,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:11:28,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:11:28,942 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:28,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:29,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:29,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250536908] [2025-02-06 13:11:29,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250536908] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:29,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120358721] [2025-02-06 13:11:29,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:29,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:29,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:29,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:29,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:11:29,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:11:29,199 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:11:29,199 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:29,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:29,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:11:29,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:29,299 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:11:29,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120358721] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:29,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:11:29,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2025-02-06 13:11:29,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036741552] [2025-02-06 13:11:29,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:29,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:11:29,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:29,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:11:29,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:11:29,331 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:29,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:29,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:29,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:29,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:29,432 INFO L124 PetriNetUnfolderBase]: 282/565 cut-off events. [2025-02-06 13:11:29,432 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-02-06 13:11:29,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 565 events. 282/565 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2431 event pairs, 202 based on Foata normal form. 48/548 useless extension candidates. Maximal degree in co-relation 877. Up to 438 conditions per place. [2025-02-06 13:11:29,456 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 29 selfloop transitions, 9 changer transitions 0/43 dead transitions. [2025-02-06 13:11:29,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 193 flow [2025-02-06 13:11:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:11:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:11:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2025-02-06 13:11:29,459 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2025-02-06 13:11:29,459 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 108 flow. Second operand 5 states and 84 transitions. [2025-02-06 13:11:29,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 193 flow [2025-02-06 13:11:29,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:29,460 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 113 flow [2025-02-06 13:11:29,460 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2025-02-06 13:11:29,461 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2025-02-06 13:11:29,461 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 113 flow [2025-02-06 13:11:29,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:29,461 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:29,461 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:29,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 13:11:29,666 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 [2025-02-06 13:11:29,666 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:29,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash 193345697, now seen corresponding path program 1 times [2025-02-06 13:11:29,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:29,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946196684] [2025-02-06 13:11:29,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:29,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:29,671 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:11:29,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:11:29,674 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:29,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:29,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:29,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946196684] [2025-02-06 13:11:29,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946196684] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:29,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:29,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:11:29,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625148552] [2025-02-06 13:11:29,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:29,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:11:29,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:29,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:11:29,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:11:29,695 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:29,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:29,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:29,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:29,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:29,762 INFO L124 PetriNetUnfolderBase]: 356/673 cut-off events. [2025-02-06 13:11:29,762 INFO L125 PetriNetUnfolderBase]: For 271/271 co-relation queries the response was YES. [2025-02-06 13:11:29,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 673 events. 356/673 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2792 event pairs, 220 based on Foata normal form. 3/603 useless extension candidates. Maximal degree in co-relation 1228. Up to 462 conditions per place. [2025-02-06 13:11:29,764 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 38 selfloop transitions, 2 changer transitions 5/50 dead transitions. [2025-02-06 13:11:29,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 247 flow [2025-02-06 13:11:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:11:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:11:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2025-02-06 13:11:29,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2025-02-06 13:11:29,765 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 113 flow. Second operand 3 states and 68 transitions. [2025-02-06 13:11:29,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 247 flow [2025-02-06 13:11:29,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 223 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:11:29,767 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 104 flow [2025-02-06 13:11:29,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2025-02-06 13:11:29,767 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2025-02-06 13:11:29,767 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 104 flow [2025-02-06 13:11:29,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:29,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:29,767 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:29,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:11:29,768 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:29,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:29,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1882503627, now seen corresponding path program 1 times [2025-02-06 13:11:29,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:29,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542220646] [2025-02-06 13:11:29,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:29,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:29,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:11:29,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:11:29,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:29,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:30,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542220646] [2025-02-06 13:11:30,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542220646] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213049459] [2025-02-06 13:11:30,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:30,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:30,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:30,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:30,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:11:30,148 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:11:30,165 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:11:30,165 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:30,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:30,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-06 13:11:30,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:30,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2025-02-06 13:11:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:30,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:30,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2025-02-06 13:11:30,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:11:30,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2025-02-06 13:11:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:30,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213049459] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:30,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:30,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-02-06 13:11:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911307042] [2025-02-06 13:11:30,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:30,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 13:11:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:30,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 13:11:30,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2025-02-06 13:11:30,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:30,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 104 flow. Second operand has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:30,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:30,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:30,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:31,881 INFO L124 PetriNetUnfolderBase]: 1418/2716 cut-off events. [2025-02-06 13:11:31,882 INFO L125 PetriNetUnfolderBase]: For 658/658 co-relation queries the response was YES. [2025-02-06 13:11:31,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5886 conditions, 2716 events. 1418/2716 cut-off events. For 658/658 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16841 event pairs, 331 based on Foata normal form. 3/2410 useless extension candidates. Maximal degree in co-relation 3764. Up to 500 conditions per place. [2025-02-06 13:11:31,890 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 141 selfloop transitions, 36 changer transitions 62/244 dead transitions. [2025-02-06 13:11:31,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 244 transitions, 1154 flow [2025-02-06 13:11:31,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 13:11:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 13:11:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 449 transitions. [2025-02-06 13:11:31,892 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49723145071982283 [2025-02-06 13:11:31,892 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 104 flow. Second operand 21 states and 449 transitions. [2025-02-06 13:11:31,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 244 transitions, 1154 flow [2025-02-06 13:11:31,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 244 transitions, 1120 flow, removed 13 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:31,896 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 380 flow [2025-02-06 13:11:31,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=380, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2025-02-06 13:11:31,897 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2025-02-06 13:11:31,897 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 380 flow [2025-02-06 13:11:31,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:31,897 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:31,897 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:31,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 13:11:32,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:32,098 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:32,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:32,098 INFO L85 PathProgramCache]: Analyzing trace with hash 496735981, now seen corresponding path program 1 times [2025-02-06 13:11:32,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:32,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736199111] [2025-02-06 13:11:32,098 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:32,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:32,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:11:32,122 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:11:32,123 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:32,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:11:32,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:32,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736199111] [2025-02-06 13:11:32,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736199111] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:32,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:32,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568105682] [2025-02-06 13:11:32,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:32,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:11:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:32,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:11:32,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:11:32,182 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2025-02-06 13:11:32,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:32,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:32,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2025-02-06 13:11:32,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:32,398 INFO L124 PetriNetUnfolderBase]: 1592/2821 cut-off events. [2025-02-06 13:11:32,399 INFO L125 PetriNetUnfolderBase]: For 3490/3490 co-relation queries the response was YES. [2025-02-06 13:11:32,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7476 conditions, 2821 events. 1592/2821 cut-off events. For 3490/3490 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 16064 event pairs, 896 based on Foata normal form. 44/2664 useless extension candidates. Maximal degree in co-relation 6655. Up to 2035 conditions per place. [2025-02-06 13:11:32,409 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 68 selfloop transitions, 2 changer transitions 3/76 dead transitions. [2025-02-06 13:11:32,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 546 flow [2025-02-06 13:11:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:11:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:11:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2025-02-06 13:11:32,410 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2025-02-06 13:11:32,410 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 380 flow. Second operand 3 states and 64 transitions. [2025-02-06 13:11:32,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 546 flow [2025-02-06 13:11:32,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 511 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-02-06 13:11:32,432 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 288 flow [2025-02-06 13:11:32,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2025-02-06 13:11:32,433 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2025-02-06 13:11:32,434 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 288 flow [2025-02-06 13:11:32,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:32,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:32,434 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:32,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:11:32,434 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:32,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2053040541, now seen corresponding path program 2 times [2025-02-06 13:11:32,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:32,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019774421] [2025-02-06 13:11:32,435 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:32,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:32,442 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-02-06 13:11:32,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 13:11:32,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:32,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:32,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:32,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019774421] [2025-02-06 13:11:32,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019774421] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:32,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661786286] [2025-02-06 13:11:32,557 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:32,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:32,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:32,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:32,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:11:32,597 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-02-06 13:11:32,624 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 13:11:32,624 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:32,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:32,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 13:11:32,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:32,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661786286] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:33,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:33,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2025-02-06 13:11:33,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549252414] [2025-02-06 13:11:33,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:33,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 13:11:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:33,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 13:11:33,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:11:33,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:33,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 288 flow. Second operand has 16 states, 16 states have (on average 14.3125) internal successors, (229), 16 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:33,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:33,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:33,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:33,467 INFO L124 PetriNetUnfolderBase]: 1138/2197 cut-off events. [2025-02-06 13:11:33,467 INFO L125 PetriNetUnfolderBase]: For 2394/2394 co-relation queries the response was YES. [2025-02-06 13:11:33,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5672 conditions, 2197 events. 1138/2197 cut-off events. For 2394/2394 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 13129 event pairs, 652 based on Foata normal form. 26/2073 useless extension candidates. Maximal degree in co-relation 5105. Up to 1171 conditions per place. [2025-02-06 13:11:33,474 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 32 selfloop transitions, 7 changer transitions 60/105 dead transitions. [2025-02-06 13:11:33,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 105 transitions, 614 flow [2025-02-06 13:11:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:11:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:11:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2025-02-06 13:11:33,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2025-02-06 13:11:33,476 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 288 flow. Second operand 10 states and 185 transitions. [2025-02-06 13:11:33,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 105 transitions, 614 flow [2025-02-06 13:11:33,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 599 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:33,485 INFO L231 Difference]: Finished difference. Result has 72 places, 45 transitions, 224 flow [2025-02-06 13:11:33,485 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=224, PETRI_PLACES=72, PETRI_TRANSITIONS=45} [2025-02-06 13:11:33,486 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2025-02-06 13:11:33,486 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 45 transitions, 224 flow [2025-02-06 13:11:33,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.3125) internal successors, (229), 16 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:33,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:33,487 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:33,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 13:11:33,689 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,SelfDestructingSolverStorable10 [2025-02-06 13:11:33,689 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:33,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:33,690 INFO L85 PathProgramCache]: Analyzing trace with hash 702596569, now seen corresponding path program 3 times [2025-02-06 13:11:33,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:33,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271541716] [2025-02-06 13:11:33,690 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:11:33,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:33,701 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 3 equivalence classes. [2025-02-06 13:11:33,710 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 33 statements. [2025-02-06 13:11:33,711 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:11:33,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:11:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:33,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271541716] [2025-02-06 13:11:33,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271541716] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:33,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247156230] [2025-02-06 13:11:33,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:11:33,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:33,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:33,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 13:11:33,809 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 3 equivalence classes. [2025-02-06 13:11:33,825 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 33 statements. [2025-02-06 13:11:33,825 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:11:33,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:33,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 13:11:33,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:11:33,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:11:34,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247156230] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:34,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:34,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2025-02-06 13:11:34,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129342813] [2025-02-06 13:11:34,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:34,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:11:34,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:34,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:11:34,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:11:34,006 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:34,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 45 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:34,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:34,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:34,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:34,245 INFO L124 PetriNetUnfolderBase]: 1184/2280 cut-off events. [2025-02-06 13:11:34,245 INFO L125 PetriNetUnfolderBase]: For 4845/4845 co-relation queries the response was YES. [2025-02-06 13:11:34,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6524 conditions, 2280 events. 1184/2280 cut-off events. For 4845/4845 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 12858 event pairs, 461 based on Foata normal form. 22/2155 useless extension candidates. Maximal degree in co-relation 6485. Up to 786 conditions per place. [2025-02-06 13:11:34,253 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2025-02-06 13:11:34,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 533 flow [2025-02-06 13:11:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2025-02-06 13:11:34,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5406976744186046 [2025-02-06 13:11:34,254 INFO L175 Difference]: Start difference. First operand has 72 places, 45 transitions, 224 flow. Second operand 4 states and 93 transitions. [2025-02-06 13:11:34,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 533 flow [2025-02-06 13:11:34,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 77 transitions, 447 flow, removed 36 selfloop flow, removed 12 redundant places. [2025-02-06 13:11:34,262 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 298 flow [2025-02-06 13:11:34,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2025-02-06 13:11:34,264 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2025-02-06 13:11:34,264 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 298 flow [2025-02-06 13:11:34,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:34,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:34,265 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:34,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 13:11:34,469 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,SelfDestructingSolverStorable11 [2025-02-06 13:11:34,469 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:34,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:34,470 INFO L85 PathProgramCache]: Analyzing trace with hash -529358573, now seen corresponding path program 4 times [2025-02-06 13:11:34,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:34,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044599922] [2025-02-06 13:11:34,470 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:11:34,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:34,480 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-02-06 13:11:34,544 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:11:34,544 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:11:34,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:11:35,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:35,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044599922] [2025-02-06 13:11:35,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044599922] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:35,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576321089] [2025-02-06 13:11:35,610 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:11:35,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:35,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:35,612 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:35,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:11:35,662 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-02-06 13:11:35,693 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:11:35,693 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:11:35,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:35,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:11:35,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-06 13:11:35,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:35,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:11:35,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2025-02-06 13:11:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-06 13:11:35,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576321089] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:35,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:11:35,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 16 [2025-02-06 13:11:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712250309] [2025-02-06 13:11:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:35,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:11:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:35,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:11:35,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:11:35,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:35,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:35,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:35,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:35,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:36,170 INFO L124 PetriNetUnfolderBase]: 1433/2666 cut-off events. [2025-02-06 13:11:36,171 INFO L125 PetriNetUnfolderBase]: For 2875/2883 co-relation queries the response was YES. [2025-02-06 13:11:36,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7058 conditions, 2666 events. 1433/2666 cut-off events. For 2875/2883 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 14677 event pairs, 381 based on Foata normal form. 7/2497 useless extension candidates. Maximal degree in co-relation 3919. Up to 862 conditions per place. [2025-02-06 13:11:36,179 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 66 selfloop transitions, 12 changer transitions 14/98 dead transitions. [2025-02-06 13:11:36,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 98 transitions, 658 flow [2025-02-06 13:11:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:11:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:11:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2025-02-06 13:11:36,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5302325581395348 [2025-02-06 13:11:36,180 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 298 flow. Second operand 5 states and 114 transitions. [2025-02-06 13:11:36,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 98 transitions, 658 flow [2025-02-06 13:11:36,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 98 transitions, 636 flow, removed 11 selfloop flow, removed 0 redundant places. [2025-02-06 13:11:36,183 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 346 flow [2025-02-06 13:11:36,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2025-02-06 13:11:36,184 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2025-02-06 13:11:36,184 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 346 flow [2025-02-06 13:11:36,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:36,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:36,184 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:36,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 13:11:36,385 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,SelfDestructingSolverStorable12 [2025-02-06 13:11:36,385 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:36,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1127163775, now seen corresponding path program 5 times [2025-02-06 13:11:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:36,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488882094] [2025-02-06 13:11:36,386 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:11:36,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:36,398 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 3 equivalence classes. [2025-02-06 13:11:36,407 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 38 statements. [2025-02-06 13:11:36,410 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:36,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-06 13:11:36,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488882094] [2025-02-06 13:11:36,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488882094] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:36,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:36,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:11:36,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252174528] [2025-02-06 13:11:36,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:36,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:36,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:36,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:36,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:36,465 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2025-02-06 13:11:36,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:36,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:36,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2025-02-06 13:11:36,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:36,765 INFO L124 PetriNetUnfolderBase]: 2506/4357 cut-off events. [2025-02-06 13:11:36,765 INFO L125 PetriNetUnfolderBase]: For 5433/5433 co-relation queries the response was YES. [2025-02-06 13:11:36,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11673 conditions, 4357 events. 2506/4357 cut-off events. For 5433/5433 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 23566 event pairs, 437 based on Foata normal form. 220/4245 useless extension candidates. Maximal degree in co-relation 7042. Up to 2213 conditions per place. [2025-02-06 13:11:36,781 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 75 selfloop transitions, 4 changer transitions 3/84 dead transitions. [2025-02-06 13:11:36,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 703 flow [2025-02-06 13:11:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2025-02-06 13:11:36,783 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2025-02-06 13:11:36,783 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 346 flow. Second operand 4 states and 76 transitions. [2025-02-06 13:11:36,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 703 flow [2025-02-06 13:11:36,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 665 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-02-06 13:11:36,788 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 347 flow [2025-02-06 13:11:36,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=347, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2025-02-06 13:11:36,790 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2025-02-06 13:11:36,790 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 347 flow [2025-02-06 13:11:36,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:36,790 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:36,790 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:36,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:11:36,790 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:36,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:36,791 INFO L85 PathProgramCache]: Analyzing trace with hash 493571637, now seen corresponding path program 1 times [2025-02-06 13:11:36,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:36,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325720258] [2025-02-06 13:11:36,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:36,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:36,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-06 13:11:36,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-06 13:11:36,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:36,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:37,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:37,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325720258] [2025-02-06 13:11:37,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325720258] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:37,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336477705] [2025-02-06 13:11:37,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:37,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:37,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:37,713 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:37,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:11:37,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-06 13:11:37,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-06 13:11:37,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:37,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:37,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 13:11:37,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:37,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2025-02-06 13:11:38,109 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2025-02-06 13:11:38,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2025-02-06 13:11:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:38,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:38,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2025-02-06 13:11:38,842 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2025-02-06 13:11:38,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 196 [2025-02-06 13:11:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:39,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336477705] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:39,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:39,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2025-02-06 13:11:39,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342644659] [2025-02-06 13:11:39,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:39,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-06 13:11:39,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:39,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-06 13:11:39,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2025-02-06 13:11:39,619 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:39,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 347 flow. Second operand has 31 states, 31 states have (on average 12.806451612903226) internal successors, (397), 31 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:39,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:39,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:39,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:43,458 INFO L124 PetriNetUnfolderBase]: 6018/11400 cut-off events. [2025-02-06 13:11:43,458 INFO L125 PetriNetUnfolderBase]: For 16549/16553 co-relation queries the response was YES. [2025-02-06 13:11:43,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31236 conditions, 11400 events. 6018/11400 cut-off events. For 16549/16553 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 79231 event pairs, 1082 based on Foata normal form. 70/10674 useless extension candidates. Maximal degree in co-relation 22407. Up to 2092 conditions per place. [2025-02-06 13:11:43,497 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 336 selfloop transitions, 104 changer transitions 97/544 dead transitions. [2025-02-06 13:11:43,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 544 transitions, 3356 flow [2025-02-06 13:11:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-02-06 13:11:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2025-02-06 13:11:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 989 transitions. [2025-02-06 13:11:43,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2025-02-06 13:11:43,500 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 347 flow. Second operand 47 states and 989 transitions. [2025-02-06 13:11:43,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 544 transitions, 3356 flow [2025-02-06 13:11:43,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 544 transitions, 3350 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-02-06 13:11:43,514 INFO L231 Difference]: Finished difference. Result has 128 places, 163 transitions, 1715 flow [2025-02-06 13:11:43,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1715, PETRI_PLACES=128, PETRI_TRANSITIONS=163} [2025-02-06 13:11:43,514 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2025-02-06 13:11:43,514 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 163 transitions, 1715 flow [2025-02-06 13:11:43,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 12.806451612903226) internal successors, (397), 31 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:43,515 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:43,515 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:43,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 13:11:43,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:43,716 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:43,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash -291720083, now seen corresponding path program 2 times [2025-02-06 13:11:43,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:43,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646033005] [2025-02-06 13:11:43,717 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:43,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:43,722 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-06 13:11:43,739 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-06 13:11:43,743 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:43,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:44,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:44,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646033005] [2025-02-06 13:11:44,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646033005] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:44,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838812899] [2025-02-06 13:11:44,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:44,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:44,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:44,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:44,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 13:11:44,299 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-06 13:11:44,318 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-06 13:11:44,318 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:44,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:44,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 13:11:44,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:44,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2025-02-06 13:11:44,714 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2025-02-06 13:11:44,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2025-02-06 13:11:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:44,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:45,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 126 [2025-02-06 13:11:45,628 INFO L349 Elim1Store]: treesize reduction 10, result has 87.3 percent of original size [2025-02-06 13:11:45,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 241 treesize of output 248 [2025-02-06 13:11:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:50,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838812899] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:50,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:50,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 29 [2025-02-06 13:11:50,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685446831] [2025-02-06 13:11:50,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:50,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-06 13:11:50,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:50,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-06 13:11:50,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2025-02-06 13:11:50,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:50,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 163 transitions, 1715 flow. Second operand has 30 states, 30 states have (on average 13.0) internal successors, (390), 30 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:50,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:50,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:50,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:52,531 INFO L124 PetriNetUnfolderBase]: 5372/10164 cut-off events. [2025-02-06 13:11:52,532 INFO L125 PetriNetUnfolderBase]: For 66035/66035 co-relation queries the response was YES. [2025-02-06 13:11:52,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35578 conditions, 10164 events. 5372/10164 cut-off events. For 66035/66035 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 69643 event pairs, 2351 based on Foata normal form. 23/9480 useless extension candidates. Maximal degree in co-relation 35081. Up to 6526 conditions per place. [2025-02-06 13:11:52,586 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 172 selfloop transitions, 30 changer transitions 79/288 dead transitions. [2025-02-06 13:11:52,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 288 transitions, 2645 flow [2025-02-06 13:11:52,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 13:11:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 13:11:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 391 transitions. [2025-02-06 13:11:52,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4330011074197121 [2025-02-06 13:11:52,589 INFO L175 Difference]: Start difference. First operand has 128 places, 163 transitions, 1715 flow. Second operand 21 states and 391 transitions. [2025-02-06 13:11:52,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 288 transitions, 2645 flow [2025-02-06 13:11:52,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 288 transitions, 2074 flow, removed 274 selfloop flow, removed 7 redundant places. [2025-02-06 13:11:52,658 INFO L231 Difference]: Finished difference. Result has 143 places, 144 transitions, 1063 flow [2025-02-06 13:11:52,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1063, PETRI_PLACES=143, PETRI_TRANSITIONS=144} [2025-02-06 13:11:52,658 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2025-02-06 13:11:52,659 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 144 transitions, 1063 flow [2025-02-06 13:11:52,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.0) internal successors, (390), 30 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:52,660 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:52,660 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:52,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 13:11:52,860 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,SelfDestructingSolverStorable15 [2025-02-06 13:11:52,861 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:11:52,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:52,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1305456609, now seen corresponding path program 3 times [2025-02-06 13:11:52,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:52,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124067136] [2025-02-06 13:11:52,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:11:52,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:52,870 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 3 equivalence classes. [2025-02-06 13:11:52,883 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 38 of 38 statements. [2025-02-06 13:11:52,883 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:11:52,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:53,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:53,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124067136] [2025-02-06 13:11:53,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124067136] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:53,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274432791] [2025-02-06 13:11:53,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:11:53,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:53,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:53,274 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:53,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 13:11:53,312 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 3 equivalence classes. [2025-02-06 13:11:53,334 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 38 of 38 statements. [2025-02-06 13:11:53,335 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:11:53,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:53,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 13:11:53,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:53,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2025-02-06 13:11:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:53,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:54,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2025-02-06 13:11:54,386 INFO L349 Elim1Store]: treesize reduction 13, result has 71.1 percent of original size [2025-02-06 13:11:54,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 191 [2025-02-06 13:11:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:54,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274432791] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:54,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:54,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2025-02-06 13:11:54,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449234450] [2025-02-06 13:11:54,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:54,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 13:11:54,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:54,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 13:11:54,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2025-02-06 13:11:54,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:11:54,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 144 transitions, 1063 flow. Second operand has 26 states, 26 states have (on average 13.461538461538462) internal successors, (350), 26 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:54,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:54,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:11:54,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:00,635 INFO L124 PetriNetUnfolderBase]: 12292/23130 cut-off events. [2025-02-06 13:12:00,635 INFO L125 PetriNetUnfolderBase]: For 173867/173867 co-relation queries the response was YES. [2025-02-06 13:12:00,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79389 conditions, 23130 events. 12292/23130 cut-off events. For 173867/173867 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 177473 event pairs, 2435 based on Foata normal form. 104/21655 useless extension candidates. Maximal degree in co-relation 77762. Up to 3880 conditions per place. [2025-02-06 13:12:00,751 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 406 selfloop transitions, 302 changer transitions 179/894 dead transitions. [2025-02-06 13:12:00,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 894 transitions, 7251 flow [2025-02-06 13:12:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2025-02-06 13:12:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2025-02-06 13:12:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 1265 transitions. [2025-02-06 13:12:00,755 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4986204178163185 [2025-02-06 13:12:00,755 INFO L175 Difference]: Start difference. First operand has 143 places, 144 transitions, 1063 flow. Second operand 59 states and 1265 transitions. [2025-02-06 13:12:00,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 894 transitions, 7251 flow [2025-02-06 13:12:00,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 894 transitions, 6872 flow, removed 164 selfloop flow, removed 17 redundant places. [2025-02-06 13:12:00,861 INFO L231 Difference]: Finished difference. Result has 207 places, 384 transitions, 4379 flow [2025-02-06 13:12:00,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=4379, PETRI_PLACES=207, PETRI_TRANSITIONS=384} [2025-02-06 13:12:00,862 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2025-02-06 13:12:00,862 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 384 transitions, 4379 flow [2025-02-06 13:12:00,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 13.461538461538462) internal successors, (350), 26 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:00,862 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:00,862 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:00,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 13:12:01,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:01,068 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:12:01,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:01,069 INFO L85 PathProgramCache]: Analyzing trace with hash 972828511, now seen corresponding path program 4 times [2025-02-06 13:12:01,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:01,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520830732] [2025-02-06 13:12:01,069 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:12:01,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:01,073 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-02-06 13:12:01,096 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-06 13:12:01,096 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:12:01,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:12:01,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520830732] [2025-02-06 13:12:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520830732] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:01,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89304953] [2025-02-06 13:12:01,530 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:12:01,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:01,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:01,534 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:12:01,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 13:12:01,574 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-02-06 13:12:01,595 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-06 13:12:01,595 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:12:01,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:01,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 13:12:01,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:12:01,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:01,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:12:01,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2025-02-06 13:12:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 13:12:01,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89304953] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:12:01,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:12:02,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 21 [2025-02-06 13:12:02,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588730744] [2025-02-06 13:12:02,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:12:02,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 13:12:02,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:02,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 13:12:02,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2025-02-06 13:12:02,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:12:02,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 384 transitions, 4379 flow. Second operand has 22 states, 22 states have (on average 14.181818181818182) internal successors, (312), 22 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:02,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:02,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:12:02,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:05,489 INFO L124 PetriNetUnfolderBase]: 13402/25310 cut-off events. [2025-02-06 13:12:05,489 INFO L125 PetriNetUnfolderBase]: For 492281/492281 co-relation queries the response was YES. [2025-02-06 13:12:05,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106759 conditions, 25310 events. 13402/25310 cut-off events. For 492281/492281 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 200231 event pairs, 5620 based on Foata normal form. 4/23607 useless extension candidates. Maximal degree in co-relation 104711. Up to 17268 conditions per place. [2025-02-06 13:12:05,660 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 410 selfloop transitions, 51 changer transitions 42/510 dead transitions. [2025-02-06 13:12:05,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 510 transitions, 6391 flow [2025-02-06 13:12:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 13:12:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 13:12:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 303 transitions. [2025-02-06 13:12:05,661 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2025-02-06 13:12:05,661 INFO L175 Difference]: Start difference. First operand has 207 places, 384 transitions, 4379 flow. Second operand 15 states and 303 transitions. [2025-02-06 13:12:05,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 510 transitions, 6391 flow [2025-02-06 13:12:06,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 510 transitions, 5213 flow, removed 582 selfloop flow, removed 6 redundant places. [2025-02-06 13:12:06,560 INFO L231 Difference]: Finished difference. Result has 220 places, 400 transitions, 3603 flow [2025-02-06 13:12:06,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3603, PETRI_PLACES=220, PETRI_TRANSITIONS=400} [2025-02-06 13:12:06,561 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2025-02-06 13:12:06,561 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 400 transitions, 3603 flow [2025-02-06 13:12:06,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.181818181818182) internal successors, (312), 22 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:06,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:06,561 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:06,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 13:12:06,765 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,SelfDestructingSolverStorable17 [2025-02-06 13:12:06,765 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:12:06,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:06,769 INFO L85 PathProgramCache]: Analyzing trace with hash -294983611, now seen corresponding path program 5 times [2025-02-06 13:12:06,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:06,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193188272] [2025-02-06 13:12:06,769 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:12:06,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:06,777 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 43 statements into 4 equivalence classes. [2025-02-06 13:12:06,786 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 13:12:06,786 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:12:06,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 13:12:06,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:06,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193188272] [2025-02-06 13:12:06,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193188272] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:06,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028870557] [2025-02-06 13:12:06,839 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:12:06,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:06,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:06,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:12:06,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 13:12:06,881 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 43 statements into 4 equivalence classes. [2025-02-06 13:12:06,900 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 13:12:06,901 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:12:06,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:06,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:12:06,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 13:12:06,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 13:12:07,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028870557] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:12:07,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:12:07,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2025-02-06 13:12:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159614737] [2025-02-06 13:12:07,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:12:07,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:12:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:07,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:12:07,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:12:07,047 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:12:07,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 400 transitions, 3603 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2025-02-06 13:12:07,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:07,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:12:07,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:11,272 INFO L124 PetriNetUnfolderBase]: 18302/35077 cut-off events. [2025-02-06 13:12:11,272 INFO L125 PetriNetUnfolderBase]: For 669458/669458 co-relation queries the response was YES. [2025-02-06 13:12:11,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141695 conditions, 35077 events. 18302/35077 cut-off events. For 669458/669458 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 291994 event pairs, 5488 based on Foata normal form. 220/32950 useless extension candidates. Maximal degree in co-relation 138293. Up to 14618 conditions per place. [2025-02-06 13:12:11,613 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 304 selfloop transitions, 235 changer transitions 0/546 dead transitions. [2025-02-06 13:12:11,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 546 transitions, 6131 flow [2025-02-06 13:12:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:12:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:12:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2025-02-06 13:12:11,616 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5488372093023256 [2025-02-06 13:12:11,616 INFO L175 Difference]: Start difference. First operand has 220 places, 400 transitions, 3603 flow. Second operand 5 states and 118 transitions. [2025-02-06 13:12:11,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 546 transitions, 6131 flow [2025-02-06 13:12:12,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 546 transitions, 5947 flow, removed 51 selfloop flow, removed 8 redundant places. [2025-02-06 13:12:12,831 INFO L231 Difference]: Finished difference. Result has 219 places, 504 transitions, 5464 flow [2025-02-06 13:12:12,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3347, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5464, PETRI_PLACES=219, PETRI_TRANSITIONS=504} [2025-02-06 13:12:12,832 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2025-02-06 13:12:12,832 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 504 transitions, 5464 flow [2025-02-06 13:12:12,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2025-02-06 13:12:12,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:12,832 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:12,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 13:12:13,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:13,033 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:12:13,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:13,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1627003487, now seen corresponding path program 6 times [2025-02-06 13:12:13,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:13,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501910275] [2025-02-06 13:12:13,034 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:12:13,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:13,040 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 4 equivalence classes. [2025-02-06 13:12:13,052 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 13:12:13,052 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-06 13:12:13,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:12:13,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:13,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501910275] [2025-02-06 13:12:13,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501910275] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:13,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349078520] [2025-02-06 13:12:13,625 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:12:13,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:13,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:13,629 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:12:13,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 13:12:13,674 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 4 equivalence classes. [2025-02-06 13:12:13,708 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 13:12:13,708 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-06 13:12:13,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:13,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 13:12:13,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:12:13,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:14,035 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:12:14,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2025-02-06 13:12:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 13:12:14,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349078520] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:12:14,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:12:14,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 23 [2025-02-06 13:12:14,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491921072] [2025-02-06 13:12:14,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:12:14,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:12:14,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:14,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:12:14,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:12:14,241 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:12:14,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 504 transitions, 5464 flow. Second operand has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:14,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:14,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:12:14,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:23,651 INFO L124 PetriNetUnfolderBase]: 30336/57317 cut-off events. [2025-02-06 13:12:23,651 INFO L125 PetriNetUnfolderBase]: For 1094551/1094551 co-relation queries the response was YES. [2025-02-06 13:12:24,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240366 conditions, 57317 events. 30336/57317 cut-off events. For 1094551/1094551 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 509940 event pairs, 8848 based on Foata normal form. 48/53499 useless extension candidates. Maximal degree in co-relation 235243. Up to 18223 conditions per place. [2025-02-06 13:12:24,477 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 644 selfloop transitions, 332 changer transitions 78/1061 dead transitions. [2025-02-06 13:12:24,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 1061 transitions, 12847 flow [2025-02-06 13:12:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-06 13:12:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-02-06 13:12:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 603 transitions. [2025-02-06 13:12:24,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2025-02-06 13:12:24,479 INFO L175 Difference]: Start difference. First operand has 219 places, 504 transitions, 5464 flow. Second operand 27 states and 603 transitions. [2025-02-06 13:12:24,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 1061 transitions, 12847 flow [2025-02-06 13:12:26,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1061 transitions, 12519 flow, removed 156 selfloop flow, removed 1 redundant places. [2025-02-06 13:12:26,552 INFO L231 Difference]: Finished difference. Result has 255 places, 686 transitions, 8837 flow [2025-02-06 13:12:26,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8837, PETRI_PLACES=255, PETRI_TRANSITIONS=686} [2025-02-06 13:12:26,553 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2025-02-06 13:12:26,553 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 686 transitions, 8837 flow [2025-02-06 13:12:26,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:26,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:26,553 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:26,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 13:12:26,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:26,754 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:12:26,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:26,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2060984601, now seen corresponding path program 7 times [2025-02-06 13:12:26,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:26,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329116444] [2025-02-06 13:12:26,754 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:12:26,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:26,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-06 13:12:26,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-06 13:12:26,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:26,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:12:27,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:27,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329116444] [2025-02-06 13:12:27,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329116444] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:27,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44848064] [2025-02-06 13:12:27,715 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:12:27,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:27,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:27,717 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:12:27,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 13:12:27,762 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-06 13:12:27,788 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-06 13:12:27,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:12:27,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:27,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-06 13:12:27,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:27,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2025-02-06 13:12:28,472 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2025-02-06 13:12:28,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2025-02-06 13:12:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:12:28,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:12:29,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 151 [2025-02-06 13:12:29,588 INFO L349 Elim1Store]: treesize reduction 50, result has 54.1 percent of original size [2025-02-06 13:12:29,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 544 treesize of output 424 [2025-02-06 13:12:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:12:31,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44848064] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:12:31,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:12:31,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2025-02-06 13:12:31,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792437677] [2025-02-06 13:12:31,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:12:31,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-06 13:12:31,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:12:31,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-06 13:12:31,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2025-02-06 13:12:31,490 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-02-06 13:12:31,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 686 transitions, 8837 flow. Second operand has 40 states, 40 states have (on average 12.85) internal successors, (514), 40 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:31,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:12:31,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-02-06 13:12:31,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:12:47,435 INFO L124 PetriNetUnfolderBase]: 38178/73692 cut-off events. [2025-02-06 13:12:47,436 INFO L125 PetriNetUnfolderBase]: For 1696945/1696945 co-relation queries the response was YES. [2025-02-06 13:12:48,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324292 conditions, 73692 events. 38178/73692 cut-off events. For 1696945/1696945 co-relation queries the response was YES. Maximal size of possible extension queue 1321. Compared 694394 event pairs, 8868 based on Foata normal form. 1523/70163 useless extension candidates. Maximal degree in co-relation 320799. Up to 17136 conditions per place. [2025-02-06 13:12:48,256 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 490 selfloop transitions, 773 changer transitions 173/1443 dead transitions. [2025-02-06 13:12:48,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 1443 transitions, 21397 flow [2025-02-06 13:12:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-02-06 13:12:48,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2025-02-06 13:12:48,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 1052 transitions. [2025-02-06 13:12:48,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47048300536672627 [2025-02-06 13:12:48,258 INFO L175 Difference]: Start difference. First operand has 255 places, 686 transitions, 8837 flow. Second operand 52 states and 1052 transitions. [2025-02-06 13:12:48,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 1443 transitions, 21397 flow [2025-02-06 13:12:51,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1443 transitions, 19559 flow, removed 880 selfloop flow, removed 17 redundant places. [2025-02-06 13:12:51,028 INFO L231 Difference]: Finished difference. Result has 312 places, 1016 transitions, 17680 flow [2025-02-06 13:12:51,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6691, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=17680, PETRI_PLACES=312, PETRI_TRANSITIONS=1016} [2025-02-06 13:12:51,029 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2025-02-06 13:12:51,029 INFO L471 AbstractCegarLoop]: Abstraction has has 312 places, 1016 transitions, 17680 flow [2025-02-06 13:12:51,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 12.85) internal successors, (514), 40 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:12:51,029 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:12:51,029 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:12:51,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 13:12:51,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:51,232 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 13:12:51,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:12:51,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1006738179, now seen corresponding path program 8 times [2025-02-06 13:12:51,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:12:51,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726016132] [2025-02-06 13:12:51,232 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:12:51,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:12:51,238 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 48 statements into 2 equivalence classes. [2025-02-06 13:12:51,259 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-02-06 13:12:51,260 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:12:51,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:12:51,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:12:51,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726016132] [2025-02-06 13:12:51,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726016132] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:12:51,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042037699] [2025-02-06 13:12:51,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:12:51,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:12:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:12:51,822 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:12:51,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 13:12:51,864 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 48 statements into 2 equivalence classes. [2025-02-06 13:12:51,885 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-02-06 13:12:51,885 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:12:51,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:12:51,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 13:12:51,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:12:52,661 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2025-02-06 13:12:52,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2025-02-06 13:12:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:12:52,668 INFO L312 TraceCheckSpWp]: Computing backward predicates...