./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:59:25,423 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:59:25,457 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:59:25,461 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:59:25,461 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:59:25,478 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:59:25,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:59:25,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:59:25,479 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:59:25,479 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:59:25,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:59:25,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:59:25,479 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:59:25,479 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:59:25,479 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:59:25,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:59:25,480 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:59:25,481 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:59:25,481 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:59:25,481 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:59:25,481 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 -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2025-02-06 12:59:25,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:59:25,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:59:25,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:59:25,694 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:59:25,694 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:59:25,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2025-02-06 12:59:26,921 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/348ad9151/b9b089c8a013440aadfdcbbb3f61113c/FLAG2cbb71083 [2025-02-06 12:59:27,233 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:59:27,233 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2025-02-06 12:59:27,241 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/348ad9151/b9b089c8a013440aadfdcbbb3f61113c/FLAG2cbb71083 [2025-02-06 12:59:27,540 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/348ad9151/b9b089c8a013440aadfdcbbb3f61113c [2025-02-06 12:59:27,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:59:27,544 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:59:27,545 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:27,546 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:59:27,549 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:59:27,550 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,551 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eaf004b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27, skipping insertion in model container [2025-02-06 12:59:27,551 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,565 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:59:27,724 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 12:59:27,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:27,736 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:59:27,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:27,766 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:59:27,767 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27 WrapperNode [2025-02-06 12:59:27,768 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:27,768 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:59:27,769 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:59:27,769 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:59:27,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,792 INFO L138 Inliner]: procedures = 22, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 101 [2025-02-06 12:59:27,793 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:59:27,793 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:59:27,793 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:59:27,793 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:59:27,798 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,800 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,819 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-06 12:59:27,822 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,822 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,829 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,835 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:59:27,836 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:59:27,839 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:59:27,839 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:59:27,840 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (1/1) ... [2025-02-06 12:59:27,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:59:27,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:27,869 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 12:59:27,871 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 12:59:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:59:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 12:59:27,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 12:59:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 12:59:27,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 12:59:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 12:59:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 12:59:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 12:59:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 12:59:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 12:59:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:59:27,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:59:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 12:59:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 12:59:27,897 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 12:59:27,987 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:59:27,988 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:59:28,213 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:59:28,214 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:59:28,367 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:59:28,368 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:59:28,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:59:28 BoogieIcfgContainer [2025-02-06 12:59:28,369 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:59:28,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:59:28,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:59:28,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:59:28,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:59:27" (1/3) ... [2025-02-06 12:59:28,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cb6cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:59:28, skipping insertion in model container [2025-02-06 12:59:28,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:27" (2/3) ... [2025-02-06 12:59:28,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cb6cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:59:28, skipping insertion in model container [2025-02-06 12:59:28,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:59:28" (3/3) ... [2025-02-06 12:59:28,379 INFO L128 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2025-02-06 12:59:28,392 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:59:28,394 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array-eq-symm.wvr.c that has 3 procedures, 43 locations, 1 initial locations, 4 loop locations, and 14 error locations. [2025-02-06 12:59:28,395 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:59:28,447 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 12:59:28,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2025-02-06 12:59:28,505 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2025-02-06 12:59:28,512 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:59:28,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 100 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-02-06 12:59:28,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2025-02-06 12:59:28,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2025-02-06 12:59:28,530 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:59:28,542 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;@3854f8ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:59:28,543 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2025-02-06 12:59:28,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:59:28,547 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 12:59:28,547 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:59:28,547 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:28,548 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:59:28,549 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:28,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash 378723, now seen corresponding path program 1 times [2025-02-06 12:59:28,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:28,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054048453] [2025-02-06 12:59:28,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:28,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:28,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:59:28,645 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:59:28,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:28,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:28,742 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 12:59:28,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:28,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054048453] [2025-02-06 12:59:28,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054048453] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:28,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:28,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 12:59:28,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100974836] [2025-02-06 12:59:28,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:28,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:28,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:28,788 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:28,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:28,823 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:28,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 12:59:28,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:28,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:28,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:28,901 INFO L124 PetriNetUnfolderBase]: 79/203 cut-off events. [2025-02-06 12:59:28,902 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-02-06 12:59:28,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 203 events. 79/203 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 890 event pairs, 26 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 283. Up to 110 conditions per place. [2025-02-06 12:59:28,905 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 18 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2025-02-06 12:59:28,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 134 flow [2025-02-06 12:59:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-02-06 12:59:28,913 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2025-02-06 12:59:28,914 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 3 states and 95 transitions. [2025-02-06 12:59:28,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 134 flow [2025-02-06 12:59:28,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:28,918 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 90 flow [2025-02-06 12:59:28,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2025-02-06 12:59:28,922 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2025-02-06 12:59:28,922 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 90 flow [2025-02-06 12:59:28,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 12:59:28,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:28,923 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:59:28,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 12:59:28,923 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:28,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 378724, now seen corresponding path program 1 times [2025-02-06 12:59:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:28,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197343314] [2025-02-06 12:59:28,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:28,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:28,930 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:59:28,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:59:28,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:28,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:29,098 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 12:59:29,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197343314] [2025-02-06 12:59:29,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197343314] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:29,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:29,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:29,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970154371] [2025-02-06 12:59:29,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:29,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:29,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:29,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:29,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:29,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:29,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 12:59:29,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:29,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:29,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:29,248 INFO L124 PetriNetUnfolderBase]: 80/206 cut-off events. [2025-02-06 12:59:29,251 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:59:29,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 206 events. 80/206 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 900 event pairs, 26 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 307. Up to 119 conditions per place. [2025-02-06 12:59:29,254 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 21 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2025-02-06 12:59:29,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 146 flow [2025-02-06 12:59:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2025-02-06 12:59:29,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2025-02-06 12:59:29,256 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 90 flow. Second operand 4 states and 122 transitions. [2025-02-06 12:59:29,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 146 flow [2025-02-06 12:59:29,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:29,259 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 113 flow [2025-02-06 12:59:29,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2025-02-06 12:59:29,259 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2025-02-06 12:59:29,259 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 113 flow [2025-02-06 12:59:29,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 12:59:29,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:29,260 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 12:59:29,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 12:59:29,260 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:29,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash 11742225, now seen corresponding path program 1 times [2025-02-06 12:59:29,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:29,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398441448] [2025-02-06 12:59:29,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:29,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:29,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 12:59:29,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 12:59:29,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:29,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:29,531 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 12:59:29,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:29,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398441448] [2025-02-06 12:59:29,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398441448] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:29,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:29,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:29,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392700144] [2025-02-06 12:59:29,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:29,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:59:29,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:29,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:59:29,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:59:29,724 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:29,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 12:59:29,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:29,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:29,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:29,847 INFO L124 PetriNetUnfolderBase]: 81/209 cut-off events. [2025-02-06 12:59:29,847 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:59:29,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 209 events. 81/209 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 925 event pairs, 26 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 328. Up to 118 conditions per place. [2025-02-06 12:59:29,852 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 21 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2025-02-06 12:59:29,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 175 flow [2025-02-06 12:59:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:59:29,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:59:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2025-02-06 12:59:29,854 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2025-02-06 12:59:29,854 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 113 flow. Second operand 5 states and 149 transitions. [2025-02-06 12:59:29,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 175 flow [2025-02-06 12:59:29,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:29,855 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 147 flow [2025-02-06 12:59:29,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2025-02-06 12:59:29,856 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2025-02-06 12:59:29,856 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 147 flow [2025-02-06 12:59:29,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 12:59:29,856 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:29,856 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 12:59:29,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 12:59:29,856 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:29,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash 363965386, now seen corresponding path program 1 times [2025-02-06 12:59:29,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:29,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643643176] [2025-02-06 12:59:29,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:29,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:29,870 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 12:59:29,884 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 12:59:29,884 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:29,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:30,145 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 12:59:30,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:30,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643643176] [2025-02-06 12:59:30,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643643176] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:30,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834907270] [2025-02-06 12:59:30,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:30,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:30,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:30,151 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 12:59:30,152 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 12:59:30,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 12:59:30,195 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 12:59:30,195 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:30,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:30,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 12:59:30,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:30,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 12:59:30,490 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 12:59:30,490 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:30,577 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 12:59:30,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834907270] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:30,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:30,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 12:59:30,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070261318] [2025-02-06 12:59:30,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:30,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 12:59:30,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:30,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 12:59:30,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 12:59:30,813 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:30,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 147 flow. Second operand has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 0 states have call successors, (0), 0 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 12:59:30,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:30,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:30,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:31,046 INFO L124 PetriNetUnfolderBase]: 82/211 cut-off events. [2025-02-06 12:59:31,046 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 12:59:31,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 211 events. 82/211 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 931 event pairs, 26 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 338. Up to 119 conditions per place. [2025-02-06 12:59:31,052 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 20 selfloop transitions, 10 changer transitions 0/49 dead transitions. [2025-02-06 12:59:31,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 218 flow [2025-02-06 12:59:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 12:59:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 12:59:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2025-02-06 12:59:31,055 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5755208333333334 [2025-02-06 12:59:31,055 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 147 flow. Second operand 8 states and 221 transitions. [2025-02-06 12:59:31,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 218 flow [2025-02-06 12:59:31,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:31,057 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 177 flow [2025-02-06 12:59:31,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2025-02-06 12:59:31,063 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2025-02-06 12:59:31,063 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 177 flow [2025-02-06 12:59:31,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 0 states have call successors, (0), 0 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 12:59:31,063 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:31,063 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 12:59:31,070 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 12:59:31,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:31,264 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:31,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:31,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1600611404, now seen corresponding path program 1 times [2025-02-06 12:59:31,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:31,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834403787] [2025-02-06 12:59:31,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:31,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:31,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:59:31,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:59:31,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:31,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:31,512 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 12:59:31,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:31,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834403787] [2025-02-06 12:59:31,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834403787] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:31,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508009837] [2025-02-06 12:59:31,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:31,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:31,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:31,521 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 12:59:31,522 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 12:59:31,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:59:31,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:59:31,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:31,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:31,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 12:59:31,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:31,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 12:59:31,743 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 12:59:31,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:31,871 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 12:59:31,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508009837] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:31,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:31,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 12:59:31,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392192894] [2025-02-06 12:59:31,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:31,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 12:59:31,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:31,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 12:59:31,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-02-06 12:59:32,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:32,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 177 flow. Second operand has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 12:59:32,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:32,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:32,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:32,478 INFO L124 PetriNetUnfolderBase]: 83/213 cut-off events. [2025-02-06 12:59:32,478 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 12:59:32,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 213 events. 83/213 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 960 event pairs, 26 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 346. Up to 111 conditions per place. [2025-02-06 12:59:32,480 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 14 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2025-02-06 12:59:32,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 249 flow [2025-02-06 12:59:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 12:59:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 12:59:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2025-02-06 12:59:32,481 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2025-02-06 12:59:32,481 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 177 flow. Second operand 9 states and 250 transitions. [2025-02-06 12:59:32,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 249 flow [2025-02-06 12:59:32,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 202 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-06 12:59:32,482 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 174 flow [2025-02-06 12:59:32,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2025-02-06 12:59:32,483 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 6 predicate places. [2025-02-06 12:59:32,483 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 174 flow [2025-02-06 12:59:32,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 12:59:32,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:32,483 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:32,493 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 12:59:32,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,684 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:32,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1923708924, now seen corresponding path program 1 times [2025-02-06 12:59:32,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:32,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860481149] [2025-02-06 12:59:32,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:32,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:32,689 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 12:59:32,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 12:59:32,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:32,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:32,728 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 12:59:32,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:32,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860481149] [2025-02-06 12:59:32,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860481149] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:32,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:32,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:32,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668510470] [2025-02-06 12:59:32,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:32,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:32,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:32,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:32,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:32,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-06 12:59:32,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 12:59:32,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:32,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-06 12:59:32,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:32,825 INFO L124 PetriNetUnfolderBase]: 119/329 cut-off events. [2025-02-06 12:59:32,825 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 12:59:32,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 329 events. 119/329 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1702 event pairs, 46 based on Foata normal form. 8/204 useless extension candidates. Maximal degree in co-relation 369. Up to 139 conditions per place. [2025-02-06 12:59:32,827 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 48 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2025-02-06 12:59:32,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 71 transitions, 362 flow [2025-02-06 12:59:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:59:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:59:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2025-02-06 12:59:32,828 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6958333333333333 [2025-02-06 12:59:32,828 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 174 flow. Second operand 5 states and 167 transitions. [2025-02-06 12:59:32,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 71 transitions, 362 flow [2025-02-06 12:59:32,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 309 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-02-06 12:59:32,830 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 170 flow [2025-02-06 12:59:32,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2025-02-06 12:59:32,831 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2025-02-06 12:59:32,831 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 170 flow [2025-02-06 12:59:32,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 12:59:32,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:32,831 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:32,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 12:59:32,831 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:32,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1298184546, now seen corresponding path program 1 times [2025-02-06 12:59:32,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:32,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208254869] [2025-02-06 12:59:32,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:32,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:32,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:59:32,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:59:32,840 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:32,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:32,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:32,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208254869] [2025-02-06 12:59:32,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208254869] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:32,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:32,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:59:32,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120032283] [2025-02-06 12:59:32,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:32,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:59:32,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:32,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:59:32,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:59:32,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-06 12:59:32,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 12:59:32,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:32,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-06 12:59:32,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:32,986 INFO L124 PetriNetUnfolderBase]: 233/650 cut-off events. [2025-02-06 12:59:32,989 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-02-06 12:59:32,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1111 conditions, 650 events. 233/650 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4150 event pairs, 67 based on Foata normal form. 8/396 useless extension candidates. Maximal degree in co-relation 793. Up to 163 conditions per place. [2025-02-06 12:59:32,993 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 50 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2025-02-06 12:59:32,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 77 transitions, 345 flow [2025-02-06 12:59:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:59:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:59:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2025-02-06 12:59:32,997 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.725 [2025-02-06 12:59:32,997 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 170 flow. Second operand 5 states and 174 transitions. [2025-02-06 12:59:32,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 77 transitions, 345 flow [2025-02-06 12:59:32,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:32,999 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 198 flow [2025-02-06 12:59:32,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2025-02-06 12:59:33,000 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2025-02-06 12:59:33,000 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 198 flow [2025-02-06 12:59:33,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 12:59:33,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:33,000 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:33,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 12:59:33,000 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:33,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:33,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1828756121, now seen corresponding path program 1 times [2025-02-06 12:59:33,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:33,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114543717] [2025-02-06 12:59:33,005 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:33,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:33,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:59:33,013 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:59:33,014 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:33,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 12:59:33,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:33,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114543717] [2025-02-06 12:59:33,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114543717] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:33,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:33,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:33,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203004828] [2025-02-06 12:59:33,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:33,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:33,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:33,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:33,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-02-06 12:59:33,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 12:59:33,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:33,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-02-06 12:59:33,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:33,162 INFO L124 PetriNetUnfolderBase]: 263/634 cut-off events. [2025-02-06 12:59:33,162 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2025-02-06 12:59:33,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 634 events. 263/634 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3749 event pairs, 138 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 698. Up to 420 conditions per place. [2025-02-06 12:59:33,166 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 32 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2025-02-06 12:59:33,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 268 flow [2025-02-06 12:59:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2025-02-06 12:59:33,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-02-06 12:59:33,167 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 198 flow. Second operand 4 states and 104 transitions. [2025-02-06 12:59:33,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 268 flow [2025-02-06 12:59:33,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:33,169 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 202 flow [2025-02-06 12:59:33,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2025-02-06 12:59:33,169 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2025-02-06 12:59:33,169 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 202 flow [2025-02-06 12:59:33,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 12:59:33,170 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:33,170 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:33,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 12:59:33,170 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:33,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1828756122, now seen corresponding path program 1 times [2025-02-06 12:59:33,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:33,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593374264] [2025-02-06 12:59:33,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:33,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:33,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:59:33,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:59:33,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:33,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593374264] [2025-02-06 12:59:33,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593374264] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:33,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:33,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:33,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61549504] [2025-02-06 12:59:33,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:33,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:33,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:33,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:33,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:33,241 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-06 12:59:33,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 12:59:33,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:33,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-06 12:59:33,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:33,309 INFO L124 PetriNetUnfolderBase]: 178/421 cut-off events. [2025-02-06 12:59:33,310 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-02-06 12:59:33,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 421 events. 178/421 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2310 event pairs, 96 based on Foata normal form. 10/343 useless extension candidates. Maximal degree in co-relation 502. Up to 264 conditions per place. [2025-02-06 12:59:33,311 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 47 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2025-02-06 12:59:33,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 360 flow [2025-02-06 12:59:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:59:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:59:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2025-02-06 12:59:33,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2025-02-06 12:59:33,312 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 202 flow. Second operand 5 states and 165 transitions. [2025-02-06 12:59:33,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 360 flow [2025-02-06 12:59:33,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:33,314 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 210 flow [2025-02-06 12:59:33,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2025-02-06 12:59:33,315 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2025-02-06 12:59:33,315 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 210 flow [2025-02-06 12:59:33,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 12:59:33,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:33,315 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:33,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 12:59:33,315 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:33,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash -917487265, now seen corresponding path program 1 times [2025-02-06 12:59:33,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:33,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416051863] [2025-02-06 12:59:33,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:33,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:33,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:59:33,324 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:59:33,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:33,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:33,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416051863] [2025-02-06 12:59:33,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416051863] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:33,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:33,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:33,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634049886] [2025-02-06 12:59:33,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:33,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:59:33,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:33,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:59:33,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:59:33,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-02-06 12:59:33,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 12:59:33,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:33,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-02-06 12:59:33,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:33,542 INFO L124 PetriNetUnfolderBase]: 223/538 cut-off events. [2025-02-06 12:59:33,542 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2025-02-06 12:59:33,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 538 events. 223/538 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2903 event pairs, 122 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 872. Up to 363 conditions per place. [2025-02-06 12:59:33,544 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 29 selfloop transitions, 8 changer transitions 0/50 dead transitions. [2025-02-06 12:59:33,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 50 transitions, 280 flow [2025-02-06 12:59:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:59:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:59:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2025-02-06 12:59:33,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-02-06 12:59:33,551 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 210 flow. Second operand 5 states and 124 transitions. [2025-02-06 12:59:33,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 50 transitions, 280 flow [2025-02-06 12:59:33,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 272 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:33,553 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 214 flow [2025-02-06 12:59:33,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2025-02-06 12:59:33,553 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2025-02-06 12:59:33,553 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 214 flow [2025-02-06 12:59:33,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 12:59:33,554 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:33,554 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:33,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 12:59:33,554 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:33,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash -917487264, now seen corresponding path program 1 times [2025-02-06 12:59:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:33,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189049036] [2025-02-06 12:59:33,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:33,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:59:33,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:59:33,575 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:33,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 12:59:33,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:33,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189049036] [2025-02-06 12:59:33,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189049036] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:33,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203225820] [2025-02-06 12:59:33,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:33,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:33,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:33,771 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 12:59:33,775 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 12:59:33,808 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:59:33,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:59:33,821 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:33,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:33,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 12:59:33,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:33,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:33,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:59:33,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 12:59:33,876 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:59:33,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:59:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 12:59:33,913 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:33,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2025-02-06 12:59:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 12:59:34,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203225820] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:34,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:34,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 12:59:34,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832368177] [2025-02-06 12:59:34,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:34,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 12:59:34,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:34,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 12:59:34,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-02-06 12:59:34,282 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:59:34,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 214 flow. Second operand has 11 states, 11 states have (on average 24.454545454545453) internal successors, (269), 11 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 12:59:34,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:34,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:59:34,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:34,506 INFO L124 PetriNetUnfolderBase]: 234/565 cut-off events. [2025-02-06 12:59:34,506 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2025-02-06 12:59:34,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1101 conditions, 565 events. 234/565 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3141 event pairs, 87 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 750. Up to 152 conditions per place. [2025-02-06 12:59:34,509 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 52 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2025-02-06 12:59:34,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 435 flow [2025-02-06 12:59:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 12:59:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 12:59:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2025-02-06 12:59:34,511 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6119791666666666 [2025-02-06 12:59:34,511 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 214 flow. Second operand 8 states and 235 transitions. [2025-02-06 12:59:34,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 435 flow [2025-02-06 12:59:34,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:34,513 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 261 flow [2025-02-06 12:59:34,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=261, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2025-02-06 12:59:34,514 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2025-02-06 12:59:34,514 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 261 flow [2025-02-06 12:59:34,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 24.454545454545453) internal successors, (269), 11 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 12:59:34,514 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:34,514 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:34,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:34,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:34,715 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:34,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:34,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1995250304, now seen corresponding path program 1 times [2025-02-06 12:59:34,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:34,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130977341] [2025-02-06 12:59:34,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:34,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:34,720 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:59:34,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:59:34,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:34,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:34,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:34,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130977341] [2025-02-06 12:59:34,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130977341] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:34,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:34,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:59:34,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123002886] [2025-02-06 12:59:34,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:34,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:59:34,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:34,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:59:34,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:59:34,787 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-06 12:59:34,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 12:59:34,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:34,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-06 12:59:34,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:34,863 INFO L124 PetriNetUnfolderBase]: 248/616 cut-off events. [2025-02-06 12:59:34,864 INFO L125 PetriNetUnfolderBase]: For 290/301 co-relation queries the response was YES. [2025-02-06 12:59:34,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 616 events. 248/616 cut-off events. For 290/301 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3527 event pairs, 95 based on Foata normal form. 5/500 useless extension candidates. Maximal degree in co-relation 1000. Up to 232 conditions per place. [2025-02-06 12:59:34,866 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 50 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2025-02-06 12:59:34,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 440 flow [2025-02-06 12:59:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:59:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:59:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2025-02-06 12:59:34,867 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2025-02-06 12:59:34,867 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 261 flow. Second operand 5 states and 170 transitions. [2025-02-06 12:59:34,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 440 flow [2025-02-06 12:59:34,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 410 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:34,869 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 267 flow [2025-02-06 12:59:34,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2025-02-06 12:59:34,870 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2025-02-06 12:59:34,870 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 267 flow [2025-02-06 12:59:34,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 12:59:34,870 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:34,870 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:34,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 12:59:34,870 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:34,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1622666204, now seen corresponding path program 1 times [2025-02-06 12:59:34,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:34,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87426483] [2025-02-06 12:59:34,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:34,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:34,875 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 12:59:34,880 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 12:59:34,880 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:34,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:34,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:34,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87426483] [2025-02-06 12:59:34,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87426483] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:34,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757830481] [2025-02-06 12:59:34,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:34,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:34,988 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 12:59:35,014 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 12:59:35,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 12:59:35,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 12:59:35,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:35,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:35,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 12:59:35,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:35,105 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:35,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-02-06 12:59:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:35,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757830481] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:35,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:35,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-06 12:59:35,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073444720] [2025-02-06 12:59:35,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:35,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 12:59:35,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:35,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 12:59:35,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-02-06 12:59:35,391 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:35,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 267 flow. Second operand has 12 states, 12 states have (on average 25.75) internal successors, (309), 12 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 12:59:35,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:35,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:35,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:35,569 INFO L124 PetriNetUnfolderBase]: 294/645 cut-off events. [2025-02-06 12:59:35,570 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2025-02-06 12:59:35,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 645 events. 294/645 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3585 event pairs, 79 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 1144. Up to 179 conditions per place. [2025-02-06 12:59:35,572 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 58 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2025-02-06 12:59:35,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 499 flow [2025-02-06 12:59:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:59:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:59:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2025-02-06 12:59:35,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2025-02-06 12:59:35,574 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 267 flow. Second operand 7 states and 229 transitions. [2025-02-06 12:59:35,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 499 flow [2025-02-06 12:59:35,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 488 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:35,575 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 303 flow [2025-02-06 12:59:35,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2025-02-06 12:59:35,576 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2025-02-06 12:59:35,576 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 303 flow [2025-02-06 12:59:35,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.75) internal successors, (309), 12 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 12:59:35,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:35,577 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:35,583 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 12:59:35,781 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,SelfDestructingSolverStorable12 [2025-02-06 12:59:35,781 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:35,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1256548547, now seen corresponding path program 1 times [2025-02-06 12:59:35,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:35,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486778926] [2025-02-06 12:59:35,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:35,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:35,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 12:59:35,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 12:59:35,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:35,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:36,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:36,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486778926] [2025-02-06 12:59:36,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486778926] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:36,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64522573] [2025-02-06 12:59:36,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:36,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:36,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:36,047 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 12:59:36,050 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 12:59:36,100 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 12:59:36,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 12:59:36,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:36,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:36,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 12:59:36,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:36,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:36,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-02-06 12:59:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:36,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64522573] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:36,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:36,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-06 12:59:36,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649537126] [2025-02-06 12:59:36,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:36,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 12:59:36,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:36,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 12:59:36,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-02-06 12:59:36,444 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:36,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 303 flow. Second operand has 12 states, 12 states have (on average 26.25) internal successors, (315), 12 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 12:59:36,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:36,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:36,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:36,623 INFO L124 PetriNetUnfolderBase]: 309/713 cut-off events. [2025-02-06 12:59:36,623 INFO L125 PetriNetUnfolderBase]: For 785/819 co-relation queries the response was YES. [2025-02-06 12:59:36,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1615 conditions, 713 events. 309/713 cut-off events. For 785/819 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4124 event pairs, 95 based on Foata normal form. 0/623 useless extension candidates. Maximal degree in co-relation 1292. Up to 215 conditions per place. [2025-02-06 12:59:36,626 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 54 selfloop transitions, 15 changer transitions 0/84 dead transitions. [2025-02-06 12:59:36,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 84 transitions, 537 flow [2025-02-06 12:59:36,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:59:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:59:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2025-02-06 12:59:36,628 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2025-02-06 12:59:36,628 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 303 flow. Second operand 7 states and 225 transitions. [2025-02-06 12:59:36,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 84 transitions, 537 flow [2025-02-06 12:59:36,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 507 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:36,630 INFO L231 Difference]: Finished difference. Result has 77 places, 56 transitions, 322 flow [2025-02-06 12:59:36,630 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=322, PETRI_PLACES=77, PETRI_TRANSITIONS=56} [2025-02-06 12:59:36,630 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 31 predicate places. [2025-02-06 12:59:36,630 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 56 transitions, 322 flow [2025-02-06 12:59:36,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 26.25) internal successors, (315), 12 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 12:59:36,631 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:36,631 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:36,637 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 12:59:36,835 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,SelfDestructingSolverStorable13 [2025-02-06 12:59:36,835 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:36,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:36,836 INFO L85 PathProgramCache]: Analyzing trace with hash -298298965, now seen corresponding path program 1 times [2025-02-06 12:59:36,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:36,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433762154] [2025-02-06 12:59:36,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:36,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:36,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 12:59:36,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 12:59:36,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:36,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 12:59:36,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433762154] [2025-02-06 12:59:36,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433762154] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549252414] [2025-02-06 12:59:36,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:36,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:36,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:36,981 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 12:59:36,987 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 12:59:37,024 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 12:59:37,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 12:59:37,040 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:37,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:37,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 12:59:37,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:37,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:37,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:59:37,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 12:59:37,096 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:59:37,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:59:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 12:59:37,148 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:37,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2025-02-06 12:59:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 12:59:37,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549252414] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:37,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:37,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 12:59:37,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096779133] [2025-02-06 12:59:37,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:37,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 12:59:37,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:37,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 12:59:37,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-02-06 12:59:37,595 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:59:37,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 56 transitions, 322 flow. Second operand has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 12:59:37,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:37,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:59:37,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:37,787 INFO L124 PetriNetUnfolderBase]: 309/655 cut-off events. [2025-02-06 12:59:37,787 INFO L125 PetriNetUnfolderBase]: For 627/661 co-relation queries the response was YES. [2025-02-06 12:59:37,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 655 events. 309/655 cut-off events. For 627/661 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3595 event pairs, 130 based on Foata normal form. 0/587 useless extension candidates. Maximal degree in co-relation 1276. Up to 214 conditions per place. [2025-02-06 12:59:37,790 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 53 selfloop transitions, 15 changer transitions 0/84 dead transitions. [2025-02-06 12:59:37,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 556 flow [2025-02-06 12:59:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 12:59:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 12:59:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2025-02-06 12:59:37,792 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6067708333333334 [2025-02-06 12:59:37,792 INFO L175 Difference]: Start difference. First operand has 77 places, 56 transitions, 322 flow. Second operand 8 states and 233 transitions. [2025-02-06 12:59:37,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 556 flow [2025-02-06 12:59:37,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 84 transitions, 523 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:37,794 INFO L231 Difference]: Finished difference. Result has 82 places, 57 transitions, 336 flow [2025-02-06 12:59:37,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=82, PETRI_TRANSITIONS=57} [2025-02-06 12:59:37,795 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 36 predicate places. [2025-02-06 12:59:37,795 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 57 transitions, 336 flow [2025-02-06 12:59:37,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 12:59:37,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:37,795 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:37,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:37,995 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,SelfDestructingSolverStorable14 [2025-02-06 12:59:37,996 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:37,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:37,997 INFO L85 PathProgramCache]: Analyzing trace with hash 992283365, now seen corresponding path program 1 times [2025-02-06 12:59:37,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:37,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267241065] [2025-02-06 12:59:37,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:37,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:38,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 12:59:38,014 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 12:59:38,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:38,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:38,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:38,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267241065] [2025-02-06 12:59:38,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267241065] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:38,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40193973] [2025-02-06 12:59:38,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:38,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:38,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:38,138 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 12:59:38,143 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 12:59:38,180 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 12:59:38,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 12:59:38,193 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:38,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:38,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:59:38,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 12:59:38,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 12:59:38,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40193973] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:38,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:38,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2025-02-06 12:59:38,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734426031] [2025-02-06 12:59:38,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:38,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 12:59:38,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:38,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 12:59:38,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-02-06 12:59:38,703 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-06 12:59:38,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 57 transitions, 336 flow. Second operand has 15 states, 15 states have (on average 27.2) internal successors, (408), 15 states have internal predecessors, (408), 0 states have call successors, (0), 0 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 12:59:38,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:38,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-06 12:59:38,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:39,371 INFO L124 PetriNetUnfolderBase]: 771/1791 cut-off events. [2025-02-06 12:59:39,372 INFO L125 PetriNetUnfolderBase]: For 2376/2545 co-relation queries the response was YES. [2025-02-06 12:59:39,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4464 conditions, 1791 events. 771/1791 cut-off events. For 2376/2545 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13171 event pairs, 315 based on Foata normal form. 48/1712 useless extension candidates. Maximal degree in co-relation 2050. Up to 263 conditions per place. [2025-02-06 12:59:39,380 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 160 selfloop transitions, 29 changer transitions 0/207 dead transitions. [2025-02-06 12:59:39,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 207 transitions, 1266 flow [2025-02-06 12:59:39,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-06 12:59:39,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-06 12:59:39,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 834 transitions. [2025-02-06 12:59:39,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6682692307692307 [2025-02-06 12:59:39,384 INFO L175 Difference]: Start difference. First operand has 82 places, 57 transitions, 336 flow. Second operand 26 states and 834 transitions. [2025-02-06 12:59:39,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 207 transitions, 1266 flow [2025-02-06 12:59:39,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 207 transitions, 1235 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 12:59:39,389 INFO L231 Difference]: Finished difference. Result has 108 places, 70 transitions, 503 flow [2025-02-06 12:59:39,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=503, PETRI_PLACES=108, PETRI_TRANSITIONS=70} [2025-02-06 12:59:39,390 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2025-02-06 12:59:39,390 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 70 transitions, 503 flow [2025-02-06 12:59:39,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 27.2) internal successors, (408), 15 states have internal predecessors, (408), 0 states have call successors, (0), 0 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 12:59:39,390 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:39,390 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:39,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:39,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:39,595 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:39,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash -336802494, now seen corresponding path program 1 times [2025-02-06 12:59:39,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:39,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338131627] [2025-02-06 12:59:39,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:39,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:39,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 12:59:39,605 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 12:59:39,606 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:39,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 12:59:39,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:39,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338131627] [2025-02-06 12:59:39,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338131627] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:39,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183982463] [2025-02-06 12:59:39,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:39,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:39,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:39,697 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 12:59:39,698 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 12:59:39,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 12:59:39,746 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 12:59:39,747 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:39,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:39,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:59:39,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:39,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 12:59:39,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183982463] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:39,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:39,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2025-02-06 12:59:39,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487983037] [2025-02-06 12:59:39,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:39,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 12:59:39,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:39,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 12:59:39,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-02-06 12:59:40,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-06 12:59:40,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 70 transitions, 503 flow. Second operand has 15 states, 15 states have (on average 27.4) internal successors, (411), 15 states have internal predecessors, (411), 0 states have call successors, (0), 0 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 12:59:40,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:40,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-06 12:59:40,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:40,650 INFO L124 PetriNetUnfolderBase]: 603/1413 cut-off events. [2025-02-06 12:59:40,650 INFO L125 PetriNetUnfolderBase]: For 2509/2659 co-relation queries the response was YES. [2025-02-06 12:59:40,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 1413 events. 603/1413 cut-off events. For 2509/2659 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10188 event pairs, 362 based on Foata normal form. 36/1318 useless extension candidates. Maximal degree in co-relation 3605. Up to 436 conditions per place. [2025-02-06 12:59:40,657 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 132 selfloop transitions, 32 changer transitions 0/182 dead transitions. [2025-02-06 12:59:40,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 182 transitions, 1187 flow [2025-02-06 12:59:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-06 12:59:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-02-06 12:59:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 865 transitions. [2025-02-06 12:59:40,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6436011904761905 [2025-02-06 12:59:40,660 INFO L175 Difference]: Start difference. First operand has 108 places, 70 transitions, 503 flow. Second operand 28 states and 865 transitions. [2025-02-06 12:59:40,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 182 transitions, 1187 flow [2025-02-06 12:59:40,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 182 transitions, 1170 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 12:59:40,665 INFO L231 Difference]: Finished difference. Result has 134 places, 76 transitions, 614 flow [2025-02-06 12:59:40,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=614, PETRI_PLACES=134, PETRI_TRANSITIONS=76} [2025-02-06 12:59:40,665 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 88 predicate places. [2025-02-06 12:59:40,665 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 76 transitions, 614 flow [2025-02-06 12:59:40,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 27.4) internal successors, (411), 15 states have internal predecessors, (411), 0 states have call successors, (0), 0 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 12:59:40,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:40,666 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:40,673 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 12:59:40,866 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,SelfDestructingSolverStorable16 [2025-02-06 12:59:40,867 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:40,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1126980309, now seen corresponding path program 1 times [2025-02-06 12:59:40,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:40,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598036298] [2025-02-06 12:59:40,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:40,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:40,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 12:59:40,876 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 12:59:40,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:40,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:40,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:40,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598036298] [2025-02-06 12:59:40,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598036298] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:40,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:40,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:40,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645625846] [2025-02-06 12:59:40,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:40,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:40,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:40,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:40,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:40,920 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 48 [2025-02-06 12:59:40,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 76 transitions, 614 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:59:40,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:40,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 48 [2025-02-06 12:59:40,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:41,050 INFO L124 PetriNetUnfolderBase]: 516/1314 cut-off events. [2025-02-06 12:59:41,050 INFO L125 PetriNetUnfolderBase]: For 3426/3642 co-relation queries the response was YES. [2025-02-06 12:59:41,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3469 conditions, 1314 events. 516/1314 cut-off events. For 3426/3642 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9392 event pairs, 160 based on Foata normal form. 9/1236 useless extension candidates. Maximal degree in co-relation 3410. Up to 622 conditions per place. [2025-02-06 12:59:41,058 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 52 selfloop transitions, 9 changer transitions 13/93 dead transitions. [2025-02-06 12:59:41,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 93 transitions, 885 flow [2025-02-06 12:59:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2025-02-06 12:59:41,059 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7638888888888888 [2025-02-06 12:59:41,059 INFO L175 Difference]: Start difference. First operand has 134 places, 76 transitions, 614 flow. Second operand 3 states and 110 transitions. [2025-02-06 12:59:41,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 93 transitions, 885 flow [2025-02-06 12:59:41,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 93 transitions, 821 flow, removed 5 selfloop flow, removed 15 redundant places. [2025-02-06 12:59:41,064 INFO L231 Difference]: Finished difference. Result has 122 places, 72 transitions, 558 flow [2025-02-06 12:59:41,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=558, PETRI_PLACES=122, PETRI_TRANSITIONS=72} [2025-02-06 12:59:41,065 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 76 predicate places. [2025-02-06 12:59:41,065 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 72 transitions, 558 flow [2025-02-06 12:59:41,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:59:41,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:41,066 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:41,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-06 12:59:41,066 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:41,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:41,066 INFO L85 PathProgramCache]: Analyzing trace with hash -15394040, now seen corresponding path program 2 times [2025-02-06 12:59:41,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:41,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397678810] [2025-02-06 12:59:41,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:59:41,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:41,073 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-06 12:59:41,083 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:59:41,084 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:59:41,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 12:59:41,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:41,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397678810] [2025-02-06 12:59:41,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397678810] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:41,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208915740] [2025-02-06 12:59:41,319 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:59:41,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:41,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:41,320 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 12:59:41,322 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 12:59:41,360 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-06 12:59:41,376 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:59:41,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:59:41,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:41,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 12:59:41,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:41,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:41,459 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:59:41,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:59:41,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 12:59:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 12:59:41,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:41,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2025-02-06 12:59:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 12:59:41,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208915740] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:41,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:41,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 20 [2025-02-06 12:59:41,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390628368] [2025-02-06 12:59:41,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:41,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 12:59:41,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:41,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 12:59:41,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-02-06 12:59:42,779 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-06 12:59:42,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 72 transitions, 558 flow. Second operand has 22 states, 22 states have (on average 23.136363636363637) internal successors, (509), 22 states have internal predecessors, (509), 0 states have call successors, (0), 0 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 12:59:42,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:42,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-06 12:59:42,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:43,505 INFO L124 PetriNetUnfolderBase]: 1362/2876 cut-off events. [2025-02-06 12:59:43,505 INFO L125 PetriNetUnfolderBase]: For 8992/9272 co-relation queries the response was YES. [2025-02-06 12:59:43,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8355 conditions, 2876 events. 1362/2876 cut-off events. For 8992/9272 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21760 event pairs, 516 based on Foata normal form. 56/2733 useless extension candidates. Maximal degree in co-relation 6556. Up to 501 conditions per place. [2025-02-06 12:59:43,521 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 129 selfloop transitions, 32 changer transitions 0/176 dead transitions. [2025-02-06 12:59:43,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 176 transitions, 1393 flow [2025-02-06 12:59:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 12:59:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 12:59:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 475 transitions. [2025-02-06 12:59:43,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6184895833333334 [2025-02-06 12:59:43,523 INFO L175 Difference]: Start difference. First operand has 122 places, 72 transitions, 558 flow. Second operand 16 states and 475 transitions. [2025-02-06 12:59:43,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 176 transitions, 1393 flow [2025-02-06 12:59:43,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 176 transitions, 1280 flow, removed 14 selfloop flow, removed 14 redundant places. [2025-02-06 12:59:43,530 INFO L231 Difference]: Finished difference. Result has 110 places, 83 transitions, 681 flow [2025-02-06 12:59:43,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=681, PETRI_PLACES=110, PETRI_TRANSITIONS=83} [2025-02-06 12:59:43,530 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 64 predicate places. [2025-02-06 12:59:43,531 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 83 transitions, 681 flow [2025-02-06 12:59:43,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 23.136363636363637) internal successors, (509), 22 states have internal predecessors, (509), 0 states have call successors, (0), 0 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 12:59:43,531 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:43,531 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:43,556 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 12:59:43,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:43,732 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:43,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash -477214924, now seen corresponding path program 1 times [2025-02-06 12:59:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:43,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400561399] [2025-02-06 12:59:43,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:43,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:43,741 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 12:59:43,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 12:59:43,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:43,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 12:59:43,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:43,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400561399] [2025-02-06 12:59:43,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400561399] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:43,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330689154] [2025-02-06 12:59:43,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:43,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:43,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:43,904 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 12:59:43,905 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 12:59:43,940 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 12:59:43,955 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 12:59:43,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:43,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:43,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 12:59:43,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 12:59:44,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:44,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2025-02-06 12:59:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 12:59:44,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330689154] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:44,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:44,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2025-02-06 12:59:44,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353832246] [2025-02-06 12:59:44,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:44,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 12:59:44,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:44,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 12:59:44,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2025-02-06 12:59:44,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:44,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 83 transitions, 681 flow. Second operand has 19 states, 19 states have (on average 25.894736842105264) internal successors, (492), 19 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:44,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:44,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:44,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:44,964 INFO L124 PetriNetUnfolderBase]: 1205/2591 cut-off events. [2025-02-06 12:59:44,964 INFO L125 PetriNetUnfolderBase]: For 6500/6804 co-relation queries the response was YES. [2025-02-06 12:59:44,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7314 conditions, 2591 events. 1205/2591 cut-off events. For 6500/6804 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19273 event pairs, 326 based on Foata normal form. 38/2476 useless extension candidates. Maximal degree in co-relation 6527. Up to 563 conditions per place. [2025-02-06 12:59:44,990 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 92 selfloop transitions, 30 changer transitions 0/141 dead transitions. [2025-02-06 12:59:44,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 141 transitions, 1133 flow [2025-02-06 12:59:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 12:59:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 12:59:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 333 transitions. [2025-02-06 12:59:44,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.69375 [2025-02-06 12:59:44,998 INFO L175 Difference]: Start difference. First operand has 110 places, 83 transitions, 681 flow. Second operand 10 states and 333 transitions. [2025-02-06 12:59:44,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 141 transitions, 1133 flow [2025-02-06 12:59:45,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 141 transitions, 1112 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:45,013 INFO L231 Difference]: Finished difference. Result has 118 places, 85 transitions, 756 flow [2025-02-06 12:59:45,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=756, PETRI_PLACES=118, PETRI_TRANSITIONS=85} [2025-02-06 12:59:45,013 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2025-02-06 12:59:45,015 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 85 transitions, 756 flow [2025-02-06 12:59:45,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 25.894736842105264) internal successors, (492), 19 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:45,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:45,015 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:45,029 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 12:59:45,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:45,217 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:45,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:45,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1947820197, now seen corresponding path program 2 times [2025-02-06 12:59:45,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:45,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673914995] [2025-02-06 12:59:45,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:59:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:45,229 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 12:59:45,247 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 12:59:45,247 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:59:45,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 12:59:45,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:45,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673914995] [2025-02-06 12:59:45,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673914995] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:45,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295379350] [2025-02-06 12:59:45,462 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:59:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:45,465 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 12:59:45,466 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 12:59:45,507 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 12:59:45,522 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 12:59:45,522 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:59:45,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:45,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 12:59:45,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 12:59:45,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:45,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2025-02-06 12:59:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 12:59:45,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295379350] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:45,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:45,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-02-06 12:59:45,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125504600] [2025-02-06 12:59:45,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:45,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 12:59:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:45,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 12:59:45,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2025-02-06 12:59:45,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:45,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 85 transitions, 756 flow. Second operand has 18 states, 18 states have (on average 26.11111111111111) internal successors, (470), 18 states have internal predecessors, (470), 0 states have call successors, (0), 0 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 12:59:45,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:45,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:45,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:46,465 INFO L124 PetriNetUnfolderBase]: 1636/3700 cut-off events. [2025-02-06 12:59:46,466 INFO L125 PetriNetUnfolderBase]: For 13738/14115 co-relation queries the response was YES. [2025-02-06 12:59:46,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10296 conditions, 3700 events. 1636/3700 cut-off events. For 13738/14115 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 30010 event pairs, 366 based on Foata normal form. 54/3559 useless extension candidates. Maximal degree in co-relation 9446. Up to 784 conditions per place. [2025-02-06 12:59:46,487 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 100 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2025-02-06 12:59:46,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 147 transitions, 1410 flow [2025-02-06 12:59:46,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 12:59:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 12:59:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 325 transitions. [2025-02-06 12:59:46,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2025-02-06 12:59:46,489 INFO L175 Difference]: Start difference. First operand has 118 places, 85 transitions, 756 flow. Second operand 10 states and 325 transitions. [2025-02-06 12:59:46,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 147 transitions, 1410 flow [2025-02-06 12:59:46,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 147 transitions, 1365 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:46,498 INFO L231 Difference]: Finished difference. Result has 126 places, 88 transitions, 806 flow [2025-02-06 12:59:46,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=806, PETRI_PLACES=126, PETRI_TRANSITIONS=88} [2025-02-06 12:59:46,498 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 80 predicate places. [2025-02-06 12:59:46,498 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 88 transitions, 806 flow [2025-02-06 12:59:46,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 26.11111111111111) internal successors, (470), 18 states have internal predecessors, (470), 0 states have call successors, (0), 0 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 12:59:46,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:46,499 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:46,505 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 12:59:46,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-02-06 12:59:46,700 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:46,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:46,701 INFO L85 PathProgramCache]: Analyzing trace with hash 252884291, now seen corresponding path program 1 times [2025-02-06 12:59:46,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:46,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269812285] [2025-02-06 12:59:46,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:46,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:46,707 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 12:59:46,714 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 12:59:46,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:46,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 12:59:46,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:46,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269812285] [2025-02-06 12:59:46,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269812285] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:46,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287163388] [2025-02-06 12:59:46,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:46,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:46,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:46,876 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 12:59:46,878 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 12:59:46,917 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 12:59:46,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 12:59:46,936 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:46,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:46,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 12:59:46,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:46,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:46,954 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 12:59:47,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:59:47,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 12:59:47,019 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:59:47,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:59:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 12:59:47,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 12:59:47,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287163388] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:47,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:47,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-02-06 12:59:47,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377232000] [2025-02-06 12:59:47,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:47,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 12:59:47,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:47,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 12:59:47,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2025-02-06 12:59:47,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-02-06 12:59:47,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 88 transitions, 806 flow. Second operand has 17 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 0 states have call successors, (0), 0 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 12:59:47,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:47,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-02-06 12:59:47,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:48,291 INFO L124 PetriNetUnfolderBase]: 1650/3453 cut-off events. [2025-02-06 12:59:48,291 INFO L125 PetriNetUnfolderBase]: For 13337/13681 co-relation queries the response was YES. [2025-02-06 12:59:48,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10176 conditions, 3453 events. 1650/3453 cut-off events. For 13337/13681 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 26780 event pairs, 607 based on Foata normal form. 54/3311 useless extension candidates. Maximal degree in co-relation 9352. Up to 787 conditions per place. [2025-02-06 12:59:48,308 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 85 selfloop transitions, 26 changer transitions 0/134 dead transitions. [2025-02-06 12:59:48,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 134 transitions, 1380 flow [2025-02-06 12:59:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 12:59:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 12:59:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2025-02-06 12:59:48,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2025-02-06 12:59:48,310 INFO L175 Difference]: Start difference. First operand has 126 places, 88 transitions, 806 flow. Second operand 11 states and 294 transitions. [2025-02-06 12:59:48,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 134 transitions, 1380 flow [2025-02-06 12:59:48,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 134 transitions, 1343 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:48,319 INFO L231 Difference]: Finished difference. Result has 134 places, 90 transitions, 852 flow [2025-02-06 12:59:48,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=852, PETRI_PLACES=134, PETRI_TRANSITIONS=90} [2025-02-06 12:59:48,320 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 88 predicate places. [2025-02-06 12:59:48,320 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 90 transitions, 852 flow [2025-02-06 12:59:48,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 0 states have call successors, (0), 0 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 12:59:48,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:48,320 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:48,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 12:59:48,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:48,521 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:48,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:48,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1485128271, now seen corresponding path program 2 times [2025-02-06 12:59:48,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:48,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506321187] [2025-02-06 12:59:48,522 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:59:48,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:48,526 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 12:59:48,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 12:59:48,537 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:59:48,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 12:59:48,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506321187] [2025-02-06 12:59:48,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506321187] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640941705] [2025-02-06 12:59:48,608 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:59:48,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:48,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:48,609 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 12:59:48,611 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 12:59:48,652 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 12:59:48,670 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 12:59:48,670 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:59:48,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:48,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 12:59:48,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 12:59:48,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 12:59:48,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640941705] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:48,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:48,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2025-02-06 12:59:48,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336477705] [2025-02-06 12:59:48,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:48,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 12:59:48,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:48,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 12:59:48,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2025-02-06 12:59:49,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-06 12:59:49,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 90 transitions, 852 flow. Second operand has 21 states, 21 states have (on average 27.0) internal successors, (567), 21 states have internal predecessors, (567), 0 states have call successors, (0), 0 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 12:59:49,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:49,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-06 12:59:49,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:50,090 INFO L124 PetriNetUnfolderBase]: 2557/5657 cut-off events. [2025-02-06 12:59:50,091 INFO L125 PetriNetUnfolderBase]: For 26439/27018 co-relation queries the response was YES. [2025-02-06 12:59:50,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17764 conditions, 5657 events. 2557/5657 cut-off events. For 26439/27018 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 49948 event pairs, 1518 based on Foata normal form. 88/5269 useless extension candidates. Maximal degree in co-relation 17723. Up to 1007 conditions per place. [2025-02-06 12:59:50,121 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 254 selfloop transitions, 59 changer transitions 0/339 dead transitions. [2025-02-06 12:59:50,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 339 transitions, 2857 flow [2025-02-06 12:59:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-02-06 12:59:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-02-06 12:59:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1433 transitions. [2025-02-06 12:59:50,125 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6490036231884058 [2025-02-06 12:59:50,125 INFO L175 Difference]: Start difference. First operand has 134 places, 90 transitions, 852 flow. Second operand 46 states and 1433 transitions. [2025-02-06 12:59:50,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 339 transitions, 2857 flow [2025-02-06 12:59:50,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 339 transitions, 2823 flow, removed 1 selfloop flow, removed 7 redundant places. [2025-02-06 12:59:50,143 INFO L231 Difference]: Finished difference. Result has 177 places, 116 transitions, 1289 flow [2025-02-06 12:59:50,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1289, PETRI_PLACES=177, PETRI_TRANSITIONS=116} [2025-02-06 12:59:50,143 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 131 predicate places. [2025-02-06 12:59:50,143 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 116 transitions, 1289 flow [2025-02-06 12:59:50,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 27.0) internal successors, (567), 21 states have internal predecessors, (567), 0 states have call successors, (0), 0 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 12:59:50,144 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:50,144 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:50,154 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 12:59:50,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:50,348 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:50,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:50,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1436007359, now seen corresponding path program 1 times [2025-02-06 12:59:50,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:50,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486502551] [2025-02-06 12:59:50,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:50,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:50,353 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 12:59:50,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 12:59:50,357 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:50,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:50,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:50,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486502551] [2025-02-06 12:59:50,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486502551] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:50,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767116382] [2025-02-06 12:59:50,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:50,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:50,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:50,500 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 12:59:50,505 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 12:59:50,546 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 12:59:50,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 12:59:50,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:50,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:50,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 12:59:50,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 12:59:50,677 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 12:59:50,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767116382] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:50,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:59:50,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 15 [2025-02-06 12:59:50,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329699193] [2025-02-06 12:59:50,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:50,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:59:50,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:50,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:59:50,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2025-02-06 12:59:50,786 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:50,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 116 transitions, 1289 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:50,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:50,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:50,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:51,299 INFO L124 PetriNetUnfolderBase]: 2855/6315 cut-off events. [2025-02-06 12:59:51,299 INFO L125 PetriNetUnfolderBase]: For 31449/32195 co-relation queries the response was YES. [2025-02-06 12:59:51,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20553 conditions, 6315 events. 2855/6315 cut-off events. For 31449/32195 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 56619 event pairs, 855 based on Foata normal form. 158/6156 useless extension candidates. Maximal degree in co-relation 15647. Up to 2058 conditions per place. [2025-02-06 12:59:51,323 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 102 selfloop transitions, 19 changer transitions 0/146 dead transitions. [2025-02-06 12:59:51,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 146 transitions, 1821 flow [2025-02-06 12:59:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:59:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:59:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2025-02-06 12:59:51,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2025-02-06 12:59:51,324 INFO L175 Difference]: Start difference. First operand has 177 places, 116 transitions, 1289 flow. Second operand 7 states and 212 transitions. [2025-02-06 12:59:51,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 146 transitions, 1821 flow [2025-02-06 12:59:51,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 146 transitions, 1672 flow, removed 2 selfloop flow, removed 20 redundant places. [2025-02-06 12:59:51,341 INFO L231 Difference]: Finished difference. Result has 165 places, 117 transitions, 1237 flow [2025-02-06 12:59:51,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1237, PETRI_PLACES=165, PETRI_TRANSITIONS=117} [2025-02-06 12:59:51,342 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 119 predicate places. [2025-02-06 12:59:51,342 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 117 transitions, 1237 flow [2025-02-06 12:59:51,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:51,342 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:51,342 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:51,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:51,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-06 12:59:51,543 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:51,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash 165330637, now seen corresponding path program 1 times [2025-02-06 12:59:51,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:51,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406560860] [2025-02-06 12:59:51,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:51,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:51,549 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 12:59:51,552 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 12:59:51,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:51,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:51,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:51,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406560860] [2025-02-06 12:59:51,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406560860] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:51,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964104188] [2025-02-06 12:59:51,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:51,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:51,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:51,678 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:51,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 12:59:51,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 12:59:51,736 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 12:59:51,736 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:51,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:51,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 12:59:51,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 12:59:51,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 12:59:51,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964104188] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:51,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:59:51,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 16 [2025-02-06 12:59:51,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531262917] [2025-02-06 12:59:51,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:51,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:59:51,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:51,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:59:51,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2025-02-06 12:59:51,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:59:51,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 117 transitions, 1237 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:51,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:51,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:59:51,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:52,433 INFO L124 PetriNetUnfolderBase]: 2558/5477 cut-off events. [2025-02-06 12:59:52,433 INFO L125 PetriNetUnfolderBase]: For 43118/44161 co-relation queries the response was YES. [2025-02-06 12:59:52,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19062 conditions, 5477 events. 2558/5477 cut-off events. For 43118/44161 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 47181 event pairs, 819 based on Foata normal form. 174/5293 useless extension candidates. Maximal degree in co-relation 14536. Up to 2167 conditions per place. [2025-02-06 12:59:52,458 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 84 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2025-02-06 12:59:52,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 142 transitions, 1619 flow [2025-02-06 12:59:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:59:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:59:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2025-02-06 12:59:52,459 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-02-06 12:59:52,459 INFO L175 Difference]: Start difference. First operand has 165 places, 117 transitions, 1237 flow. Second operand 7 states and 216 transitions. [2025-02-06 12:59:52,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 142 transitions, 1619 flow [2025-02-06 12:59:52,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 142 transitions, 1582 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-06 12:59:52,474 INFO L231 Difference]: Finished difference. Result has 168 places, 118 transitions, 1331 flow [2025-02-06 12:59:52,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1331, PETRI_PLACES=168, PETRI_TRANSITIONS=118} [2025-02-06 12:59:52,474 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 122 predicate places. [2025-02-06 12:59:52,474 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 118 transitions, 1331 flow [2025-02-06 12:59:52,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:52,475 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:52,475 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:52,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:52,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-06 12:59:52,676 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:52,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash 303604394, now seen corresponding path program 3 times [2025-02-06 12:59:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:52,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737030096] [2025-02-06 12:59:52,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:59:52,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:52,685 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-02-06 12:59:52,691 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 25 statements. [2025-02-06 12:59:52,691 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 12:59:52,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-06 12:59:52,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:52,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737030096] [2025-02-06 12:59:52,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737030096] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:52,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208115177] [2025-02-06 12:59:52,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:59:52,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:52,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:52,814 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:52,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 12:59:52,860 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-02-06 12:59:52,875 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 25 statements. [2025-02-06 12:59:52,876 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 12:59:52,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:52,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 12:59:52,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-06 12:59:52,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:53,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2025-02-06 12:59:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-06 12:59:53,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208115177] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:53,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:53,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-06 12:59:53,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137240947] [2025-02-06 12:59:53,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:53,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 12:59:53,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:53,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 12:59:53,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-02-06 12:59:53,398 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:59:53,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 118 transitions, 1331 flow. Second operand has 15 states, 15 states have (on average 24.333333333333332) internal successors, (365), 15 states have internal predecessors, (365), 0 states have call successors, (0), 0 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 12:59:53,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:53,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:59:53,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:54,188 INFO L124 PetriNetUnfolderBase]: 3295/7239 cut-off events. [2025-02-06 12:59:54,189 INFO L125 PetriNetUnfolderBase]: For 32036/32036 co-relation queries the response was YES. [2025-02-06 12:59:54,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25722 conditions, 7239 events. 3295/7239 cut-off events. For 32036/32036 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 60592 event pairs, 500 based on Foata normal form. 111/7332 useless extension candidates. Maximal degree in co-relation 19544. Up to 2172 conditions per place. [2025-02-06 12:59:54,307 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 124 selfloop transitions, 33 changer transitions 0/175 dead transitions. [2025-02-06 12:59:54,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 175 transitions, 2312 flow [2025-02-06 12:59:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 12:59:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 12:59:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2025-02-06 12:59:54,314 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2025-02-06 12:59:54,315 INFO L175 Difference]: Start difference. First operand has 168 places, 118 transitions, 1331 flow. Second operand 8 states and 228 transitions. [2025-02-06 12:59:54,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 175 transitions, 2312 flow [2025-02-06 12:59:54,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 175 transitions, 2213 flow, removed 5 selfloop flow, removed 7 redundant places. [2025-02-06 12:59:54,353 INFO L231 Difference]: Finished difference. Result has 167 places, 117 transitions, 1320 flow [2025-02-06 12:59:54,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1320, PETRI_PLACES=167, PETRI_TRANSITIONS=117} [2025-02-06 12:59:54,354 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 121 predicate places. [2025-02-06 12:59:54,354 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 117 transitions, 1320 flow [2025-02-06 12:59:54,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 24.333333333333332) internal successors, (365), 15 states have internal predecessors, (365), 0 states have call successors, (0), 0 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 12:59:54,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:54,355 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:54,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 12:59:54,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:54,559 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:54,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash 821801950, now seen corresponding path program 2 times [2025-02-06 12:59:54,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:54,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758504735] [2025-02-06 12:59:54,561 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:59:54,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:54,567 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 12:59:54,580 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 12:59:54,580 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:59:54,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 12:59:54,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:54,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758504735] [2025-02-06 12:59:54,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758504735] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:54,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58506216] [2025-02-06 12:59:54,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:59:54,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:54,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:54,680 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:54,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 12:59:54,727 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 12:59:54,748 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 12:59:54,748 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:59:54,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:54,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 12:59:54,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 12:59:54,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 12:59:54,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58506216] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:54,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:54,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-06 12:59:54,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288398124] [2025-02-06 12:59:54,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:54,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 12:59:54,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:54,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 12:59:54,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2025-02-06 12:59:55,149 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 48 [2025-02-06 12:59:55,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 117 transitions, 1320 flow. Second operand has 18 states, 18 states have (on average 27.666666666666668) internal successors, (498), 18 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 12:59:55,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:55,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 48 [2025-02-06 12:59:55,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:55,808 INFO L124 PetriNetUnfolderBase]: 2045/4765 cut-off events. [2025-02-06 12:59:55,809 INFO L125 PetriNetUnfolderBase]: For 26856/27569 co-relation queries the response was YES. [2025-02-06 12:59:55,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16594 conditions, 4765 events. 2045/4765 cut-off events. For 26856/27569 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 42496 event pairs, 1392 based on Foata normal form. 44/4537 useless extension candidates. Maximal degree in co-relation 12821. Up to 1979 conditions per place. [2025-02-06 12:59:55,834 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 103 selfloop transitions, 46 changer transitions 0/175 dead transitions. [2025-02-06 12:59:55,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 175 transitions, 1970 flow [2025-02-06 12:59:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 12:59:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 12:59:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 467 transitions. [2025-02-06 12:59:55,835 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486111111111111 [2025-02-06 12:59:55,835 INFO L175 Difference]: Start difference. First operand has 167 places, 117 transitions, 1320 flow. Second operand 15 states and 467 transitions. [2025-02-06 12:59:55,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 175 transitions, 1970 flow [2025-02-06 12:59:55,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 175 transitions, 1896 flow, removed 1 selfloop flow, removed 6 redundant places. [2025-02-06 12:59:55,852 INFO L231 Difference]: Finished difference. Result has 178 places, 122 transitions, 1471 flow [2025-02-06 12:59:55,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1471, PETRI_PLACES=178, PETRI_TRANSITIONS=122} [2025-02-06 12:59:55,853 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 132 predicate places. [2025-02-06 12:59:55,853 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 122 transitions, 1471 flow [2025-02-06 12:59:55,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.666666666666668) internal successors, (498), 18 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 12:59:55,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:55,854 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:55,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 12:59:56,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:56,054 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:56,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:56,055 INFO L85 PathProgramCache]: Analyzing trace with hash 922818416, now seen corresponding path program 3 times [2025-02-06 12:59:56,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:56,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56150919] [2025-02-06 12:59:56,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:59:56,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:56,062 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 5 equivalence classes. [2025-02-06 12:59:56,068 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 27 statements. [2025-02-06 12:59:56,068 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 12:59:56,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 12:59:56,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:56,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56150919] [2025-02-06 12:59:56,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56150919] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:59:56,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115913383] [2025-02-06 12:59:56,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:59:56,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:56,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:56,197 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:56,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 12:59:56,244 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 5 equivalence classes. [2025-02-06 12:59:56,257 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 27 statements. [2025-02-06 12:59:56,257 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 12:59:56,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:56,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 12:59:56,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:56,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:56,307 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 12:59:56,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2025-02-06 12:59:56,314 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:59:56,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:59:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-06 12:59:56,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:56,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2025-02-06 12:59:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-06 12:59:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115913383] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:56,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:59:56,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2025-02-06 12:59:56,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251068612] [2025-02-06 12:59:56,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:56,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 12:59:56,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:56,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 12:59:56,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-02-06 12:59:57,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2025-02-06 12:59:57,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 122 transitions, 1471 flow. Second operand has 18 states, 18 states have (on average 22.27777777777778) internal successors, (401), 18 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 12:59:57,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:57,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2025-02-06 12:59:57,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:58,030 INFO L124 PetriNetUnfolderBase]: 2929/6593 cut-off events. [2025-02-06 12:59:58,031 INFO L125 PetriNetUnfolderBase]: For 29263/29275 co-relation queries the response was YES. [2025-02-06 12:59:58,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23527 conditions, 6593 events. 2929/6593 cut-off events. For 29263/29275 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 55384 event pairs, 494 based on Foata normal form. 30/6581 useless extension candidates. Maximal degree in co-relation 18335. Up to 1741 conditions per place. [2025-02-06 12:59:58,069 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 93 selfloop transitions, 63 changer transitions 0/173 dead transitions. [2025-02-06 12:59:58,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 173 transitions, 2242 flow [2025-02-06 12:59:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 12:59:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 12:59:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2025-02-06 12:59:58,071 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2025-02-06 12:59:58,071 INFO L175 Difference]: Start difference. First operand has 178 places, 122 transitions, 1471 flow. Second operand 9 states and 237 transitions. [2025-02-06 12:59:58,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 173 transitions, 2242 flow [2025-02-06 12:59:58,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 173 transitions, 2144 flow, removed 2 selfloop flow, removed 12 redundant places. [2025-02-06 12:59:58,107 INFO L231 Difference]: Finished difference. Result has 173 places, 121 transitions, 1491 flow [2025-02-06 12:59:58,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1491, PETRI_PLACES=173, PETRI_TRANSITIONS=121} [2025-02-06 12:59:58,108 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 127 predicate places. [2025-02-06 12:59:58,108 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 121 transitions, 1491 flow [2025-02-06 12:59:58,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.27777777777778) internal successors, (401), 18 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 12:59:58,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:58,109 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:58,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:58,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-06 12:59:58,314 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:58,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash -422690094, now seen corresponding path program 1 times [2025-02-06 12:59:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:58,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572450150] [2025-02-06 12:59:58,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:58,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:58,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 12:59:58,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 12:59:58,345 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:58,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 12:59:58,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:58,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572450150] [2025-02-06 12:59:58,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572450150] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:58,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:58,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 12:59:58,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844659475] [2025-02-06 12:59:58,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:58,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 12:59:58,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:58,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 12:59:58,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-06 12:59:58,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:59:58,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 121 transitions, 1491 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 12:59:58,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:58,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:59:58,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:59,354 INFO L124 PetriNetUnfolderBase]: 3561/7406 cut-off events. [2025-02-06 12:59:59,354 INFO L125 PetriNetUnfolderBase]: For 32492/32492 co-relation queries the response was YES. [2025-02-06 12:59:59,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26920 conditions, 7406 events. 3561/7406 cut-off events. For 32492/32492 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 59207 event pairs, 932 based on Foata normal form. 36/7406 useless extension candidates. Maximal degree in co-relation 21069. Up to 5160 conditions per place. [2025-02-06 12:59:59,507 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 115 selfloop transitions, 57 changer transitions 13/196 dead transitions. [2025-02-06 12:59:59,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 196 transitions, 2635 flow [2025-02-06 12:59:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 12:59:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 12:59:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2025-02-06 12:59:59,508 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6134259259259259 [2025-02-06 12:59:59,508 INFO L175 Difference]: Start difference. First operand has 173 places, 121 transitions, 1491 flow. Second operand 9 states and 265 transitions. [2025-02-06 12:59:59,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 196 transitions, 2635 flow [2025-02-06 12:59:59,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 196 transitions, 2439 flow, removed 10 selfloop flow, removed 7 redundant places. [2025-02-06 12:59:59,544 INFO L231 Difference]: Finished difference. Result has 180 places, 153 transitions, 2101 flow [2025-02-06 12:59:59,545 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2101, PETRI_PLACES=180, PETRI_TRANSITIONS=153} [2025-02-06 12:59:59,545 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 134 predicate places. [2025-02-06 12:59:59,546 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 153 transitions, 2101 flow [2025-02-06 12:59:59,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 12:59:59,547 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:59,547 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:59,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-02-06 12:59:59,547 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 12:59:59,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash -405425706, now seen corresponding path program 1 times [2025-02-06 12:59:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:59:59,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605563468] [2025-02-06 12:59:59,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:59,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:59:59,552 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 12:59:59,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 12:59:59,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:59,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 12:59:59,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:59:59,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605563468] [2025-02-06 12:59:59,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605563468] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:59,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:59,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 12:59:59,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335872842] [2025-02-06 12:59:59,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:59,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 12:59:59,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:59:59,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 12:59:59,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-06 12:59:59,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:59:59,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 153 transitions, 2101 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 12:59:59,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:59,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:59:59,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:00,691 INFO L124 PetriNetUnfolderBase]: 3543/7407 cut-off events. [2025-02-06 13:00:00,692 INFO L125 PetriNetUnfolderBase]: For 34846/34846 co-relation queries the response was YES. [2025-02-06 13:00:00,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28485 conditions, 7407 events. 3543/7407 cut-off events. For 34846/34846 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 59517 event pairs, 946 based on Foata normal form. 45/7424 useless extension candidates. Maximal degree in co-relation 22663. Up to 5160 conditions per place. [2025-02-06 13:00:00,726 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 115 selfloop transitions, 75 changer transitions 18/219 dead transitions. [2025-02-06 13:00:00,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 219 transitions, 3247 flow [2025-02-06 13:00:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:00:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:00:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 270 transitions. [2025-02-06 13:00:00,728 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-02-06 13:00:00,728 INFO L175 Difference]: Start difference. First operand has 180 places, 153 transitions, 2101 flow. Second operand 9 states and 270 transitions. [2025-02-06 13:00:00,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 219 transitions, 3247 flow [2025-02-06 13:00:00,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 219 transitions, 3083 flow, removed 16 selfloop flow, removed 5 redundant places. [2025-02-06 13:00:00,801 INFO L231 Difference]: Finished difference. Result has 187 places, 176 transitions, 2703 flow [2025-02-06 13:00:00,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2703, PETRI_PLACES=187, PETRI_TRANSITIONS=176} [2025-02-06 13:00:00,802 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 141 predicate places. [2025-02-06 13:00:00,802 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 176 transitions, 2703 flow [2025-02-06 13:00:00,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 13:00:00,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:00,802 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:00,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-02-06 13:00:00,802 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:00,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:00,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1959162736, now seen corresponding path program 2 times [2025-02-06 13:00:00,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:00,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480046483] [2025-02-06 13:00:00,803 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:00:00,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:00,807 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:00,812 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:00,814 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:00:00,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:00:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480046483] [2025-02-06 13:00:01,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480046483] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:00:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325003691] [2025-02-06 13:00:01,079 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:00:01,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:01,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:01,082 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:01,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-06 13:00:01,124 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:01,141 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:01,141 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:00:01,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:01,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:00:01,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:01,269 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-06 13:00:01,270 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 26 treesize of output 10 [2025-02-06 13:00:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:01,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:01,392 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-06 13:00:01,393 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 40 treesize of output 56 [2025-02-06 13:00:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:01,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325003691] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:00:01,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:00:01,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2025-02-06 13:00:01,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596458626] [2025-02-06 13:00:01,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:00:01,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:00:01,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:01,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:00:01,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:00:02,202 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:02,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 176 transitions, 2703 flow. Second operand has 20 states, 20 states have (on average 24.8) internal successors, (496), 20 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 13:00:02,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:02,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:02,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:03,483 INFO L124 PetriNetUnfolderBase]: 3688/7840 cut-off events. [2025-02-06 13:00:03,483 INFO L125 PetriNetUnfolderBase]: For 36945/36945 co-relation queries the response was YES. [2025-02-06 13:00:03,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31616 conditions, 7840 events. 3688/7840 cut-off events. For 36945/36945 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 63243 event pairs, 395 based on Foata normal form. 110/7920 useless extension candidates. Maximal degree in co-relation 28336. Up to 3818 conditions per place. [2025-02-06 13:00:03,545 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 143 selfloop transitions, 95 changer transitions 3/252 dead transitions. [2025-02-06 13:00:03,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 252 transitions, 3840 flow [2025-02-06 13:00:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:00:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:00:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 330 transitions. [2025-02-06 13:00:03,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-02-06 13:00:03,547 INFO L175 Difference]: Start difference. First operand has 187 places, 176 transitions, 2703 flow. Second operand 11 states and 330 transitions. [2025-02-06 13:00:03,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 252 transitions, 3840 flow [2025-02-06 13:00:03,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 252 transitions, 3749 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-02-06 13:00:03,673 INFO L231 Difference]: Finished difference. Result has 193 places, 184 transitions, 2986 flow [2025-02-06 13:00:03,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2624, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2986, PETRI_PLACES=193, PETRI_TRANSITIONS=184} [2025-02-06 13:00:03,674 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 147 predicate places. [2025-02-06 13:00:03,674 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 184 transitions, 2986 flow [2025-02-06 13:00:03,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 24.8) internal successors, (496), 20 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 13:00:03,674 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:03,674 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:03,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 13:00:03,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:03,875 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:03,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1123265112, now seen corresponding path program 2 times [2025-02-06 13:00:03,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:03,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233827440] [2025-02-06 13:00:03,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:00:03,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:03,881 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:03,891 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:03,892 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:00:03,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:04,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:04,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233827440] [2025-02-06 13:00:04,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233827440] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:04,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:04,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:04,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462197062] [2025-02-06 13:00:04,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:04,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:04,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:04,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:04,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:04,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:04,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 184 transitions, 2986 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:04,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:04,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:04,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:05,210 INFO L124 PetriNetUnfolderBase]: 4048/8285 cut-off events. [2025-02-06 13:00:05,211 INFO L125 PetriNetUnfolderBase]: For 53988/53988 co-relation queries the response was YES. [2025-02-06 13:00:05,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35723 conditions, 8285 events. 4048/8285 cut-off events. For 53988/53988 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 65801 event pairs, 1436 based on Foata normal form. 45/8268 useless extension candidates. Maximal degree in co-relation 31038. Up to 5777 conditions per place. [2025-02-06 13:00:05,254 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 127 selfloop transitions, 107 changer transitions 11/256 dead transitions. [2025-02-06 13:00:05,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 256 transitions, 4613 flow [2025-02-06 13:00:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2025-02-06 13:00:05,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2025-02-06 13:00:05,255 INFO L175 Difference]: Start difference. First operand has 193 places, 184 transitions, 2986 flow. Second operand 8 states and 244 transitions. [2025-02-06 13:00:05,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 256 transitions, 4613 flow [2025-02-06 13:00:05,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 256 transitions, 4462 flow, removed 12 selfloop flow, removed 6 redundant places. [2025-02-06 13:00:05,428 INFO L231 Difference]: Finished difference. Result has 198 places, 227 transitions, 4160 flow [2025-02-06 13:00:05,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4160, PETRI_PLACES=198, PETRI_TRANSITIONS=227} [2025-02-06 13:00:05,428 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 152 predicate places. [2025-02-06 13:00:05,428 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 227 transitions, 4160 flow [2025-02-06 13:00:05,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:05,429 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:05,429 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:05,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-02-06 13:00:05,429 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:05,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1426913486, now seen corresponding path program 3 times [2025-02-06 13:00:05,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:05,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031724650] [2025-02-06 13:00:05,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:00:05,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:05,433 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:05,440 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 28 statements. [2025-02-06 13:00:05,441 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:00:05,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:05,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:05,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031724650] [2025-02-06 13:00:05,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031724650] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:05,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:05,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097087433] [2025-02-06 13:00:05,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:05,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:05,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:05,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:05,669 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:05,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 227 transitions, 4160 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:05,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:05,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:05,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:06,517 INFO L124 PetriNetUnfolderBase]: 4057/8371 cut-off events. [2025-02-06 13:00:06,517 INFO L125 PetriNetUnfolderBase]: For 56353/56353 co-relation queries the response was YES. [2025-02-06 13:00:06,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36852 conditions, 8371 events. 4057/8371 cut-off events. For 56353/56353 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 67036 event pairs, 1361 based on Foata normal form. 36/8379 useless extension candidates. Maximal degree in co-relation 32668. Up to 5813 conditions per place. [2025-02-06 13:00:06,572 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 131 selfloop transitions, 118 changer transitions 10/270 dead transitions. [2025-02-06 13:00:06,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 270 transitions, 5141 flow [2025-02-06 13:00:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:06,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2025-02-06 13:00:06,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6328125 [2025-02-06 13:00:06,573 INFO L175 Difference]: Start difference. First operand has 198 places, 227 transitions, 4160 flow. Second operand 8 states and 243 transitions. [2025-02-06 13:00:06,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 270 transitions, 5141 flow [2025-02-06 13:00:06,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 270 transitions, 4995 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-02-06 13:00:06,821 INFO L231 Difference]: Finished difference. Result has 205 places, 241 transitions, 4635 flow [2025-02-06 13:00:06,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4635, PETRI_PLACES=205, PETRI_TRANSITIONS=241} [2025-02-06 13:00:06,821 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 159 predicate places. [2025-02-06 13:00:06,821 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 241 transitions, 4635 flow [2025-02-06 13:00:06,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:06,822 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:06,822 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:06,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-02-06 13:00:06,822 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:06,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash -494751218, now seen corresponding path program 4 times [2025-02-06 13:00:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266795055] [2025-02-06 13:00:06,823 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:00:06,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:06,828 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:06,835 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:06,837 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:00:06,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:06,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:06,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266795055] [2025-02-06 13:00:06,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266795055] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:06,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:06,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:06,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582975659] [2025-02-06 13:00:06,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:06,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:06,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:06,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:06,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:07,044 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:07,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 241 transitions, 4635 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:07,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:07,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:07,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:07,930 INFO L124 PetriNetUnfolderBase]: 3859/7945 cut-off events. [2025-02-06 13:00:07,931 INFO L125 PetriNetUnfolderBase]: For 62706/62706 co-relation queries the response was YES. [2025-02-06 13:00:07,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36871 conditions, 7945 events. 3859/7945 cut-off events. For 62706/62706 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 63232 event pairs, 1325 based on Foata normal form. 36/7927 useless extension candidates. Maximal degree in co-relation 32684. Up to 5867 conditions per place. [2025-02-06 13:00:07,993 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 134 selfloop transitions, 147 changer transitions 4/296 dead transitions. [2025-02-06 13:00:07,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 296 transitions, 6125 flow [2025-02-06 13:00:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2025-02-06 13:00:07,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-02-06 13:00:07,994 INFO L175 Difference]: Start difference. First operand has 205 places, 241 transitions, 4635 flow. Second operand 8 states and 240 transitions. [2025-02-06 13:00:07,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 296 transitions, 6125 flow [2025-02-06 13:00:08,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 296 transitions, 5857 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-02-06 13:00:08,242 INFO L231 Difference]: Finished difference. Result has 209 places, 271 transitions, 5576 flow [2025-02-06 13:00:08,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5576, PETRI_PLACES=209, PETRI_TRANSITIONS=271} [2025-02-06 13:00:08,243 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 163 predicate places. [2025-02-06 13:00:08,243 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 271 transitions, 5576 flow [2025-02-06 13:00:08,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:08,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:08,244 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:08,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-02-06 13:00:08,244 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:08,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash 702509304, now seen corresponding path program 5 times [2025-02-06 13:00:08,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:08,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025542328] [2025-02-06 13:00:08,244 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:00:08,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:08,249 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:08,261 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:08,264 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:00:08,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:00:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025542328] [2025-02-06 13:00:08,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025542328] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:00:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005213516] [2025-02-06 13:00:08,520 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:00:08,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:08,522 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:08,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-06 13:00:08,579 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:08,599 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:08,599 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:00:08,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:08,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 13:00:08,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:08,661 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 15 treesize of output 1 [2025-02-06 13:00:08,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:08,787 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 29 treesize of output 25 [2025-02-06 13:00:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:00:08,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:08,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:08,976 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 158 treesize of output 154 [2025-02-06 13:00:09,012 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 13:00:09,012 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 46 treesize of output 37 [2025-02-06 13:00:09,050 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2025-02-06 13:00:09,050 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 175 treesize of output 178 [2025-02-06 13:00:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:00:09,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005213516] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:00:09,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:00:09,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2025-02-06 13:00:09,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105424423] [2025-02-06 13:00:09,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:00:09,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 13:00:09,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:09,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 13:00:09,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2025-02-06 13:00:10,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:10,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 271 transitions, 5576 flow. Second operand has 25 states, 25 states have (on average 24.2) internal successors, (605), 25 states have internal predecessors, (605), 0 states have call successors, (0), 0 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 13:00:10,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:10,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:10,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:11,367 INFO L124 PetriNetUnfolderBase]: 4063/8322 cut-off events. [2025-02-06 13:00:11,367 INFO L125 PetriNetUnfolderBase]: For 70297/70297 co-relation queries the response was YES. [2025-02-06 13:00:11,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38909 conditions, 8322 events. 4063/8322 cut-off events. For 70297/70297 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 66840 event pairs, 1429 based on Foata normal form. 36/8312 useless extension candidates. Maximal degree in co-relation 34584. Up to 5954 conditions per place. [2025-02-06 13:00:11,437 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 123 selfloop transitions, 191 changer transitions 3/328 dead transitions. [2025-02-06 13:00:11,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 328 transitions, 7009 flow [2025-02-06 13:00:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:00:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:00:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 391 transitions. [2025-02-06 13:00:11,442 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5818452380952381 [2025-02-06 13:00:11,442 INFO L175 Difference]: Start difference. First operand has 209 places, 271 transitions, 5576 flow. Second operand 14 states and 391 transitions. [2025-02-06 13:00:11,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 328 transitions, 7009 flow [2025-02-06 13:00:11,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 328 transitions, 6531 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-02-06 13:00:11,760 INFO L231 Difference]: Finished difference. Result has 218 places, 298 transitions, 6239 flow [2025-02-06 13:00:11,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5170, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6239, PETRI_PLACES=218, PETRI_TRANSITIONS=298} [2025-02-06 13:00:11,765 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 172 predicate places. [2025-02-06 13:00:11,765 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 298 transitions, 6239 flow [2025-02-06 13:00:11,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 24.2) internal successors, (605), 25 states have internal predecessors, (605), 0 states have call successors, (0), 0 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 13:00:11,765 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:11,765 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:11,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-06 13:00:11,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:11,966 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:11,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1887731112, now seen corresponding path program 6 times [2025-02-06 13:00:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274927039] [2025-02-06 13:00:11,967 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:00:11,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:11,976 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:11,982 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 28 statements. [2025-02-06 13:00:11,982 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:00:11,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:12,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274927039] [2025-02-06 13:00:12,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274927039] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:12,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:12,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:12,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7216980] [2025-02-06 13:00:12,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:12,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:12,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:12,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:12,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:12,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:12,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 298 transitions, 6239 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:12,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:12,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:12,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:13,213 INFO L124 PetriNetUnfolderBase]: 4185/8584 cut-off events. [2025-02-06 13:00:13,213 INFO L125 PetriNetUnfolderBase]: For 74612/74612 co-relation queries the response was YES. [2025-02-06 13:00:13,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41467 conditions, 8584 events. 4185/8584 cut-off events. For 74612/74612 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 69345 event pairs, 1389 based on Foata normal form. 110/8642 useless extension candidates. Maximal degree in co-relation 36989. Up to 6307 conditions per place. [2025-02-06 13:00:13,276 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 156 selfloop transitions, 171 changer transitions 1/339 dead transitions. [2025-02-06 13:00:13,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 339 transitions, 7287 flow [2025-02-06 13:00:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2025-02-06 13:00:13,277 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6380208333333334 [2025-02-06 13:00:13,277 INFO L175 Difference]: Start difference. First operand has 218 places, 298 transitions, 6239 flow. Second operand 8 states and 245 transitions. [2025-02-06 13:00:13,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 339 transitions, 7287 flow [2025-02-06 13:00:13,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 339 transitions, 7065 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-02-06 13:00:13,591 INFO L231 Difference]: Finished difference. Result has 218 places, 304 transitions, 6536 flow [2025-02-06 13:00:13,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6022, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6536, PETRI_PLACES=218, PETRI_TRANSITIONS=304} [2025-02-06 13:00:13,591 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 172 predicate places. [2025-02-06 13:00:13,592 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 304 transitions, 6536 flow [2025-02-06 13:00:13,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:13,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:13,592 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:13,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-02-06 13:00:13,592 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:13,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:13,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1495067364, now seen corresponding path program 7 times [2025-02-06 13:00:13,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:13,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835023896] [2025-02-06 13:00:13,593 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:00:13,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:13,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:00:13,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:13,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:00:13,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:00:13,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:13,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835023896] [2025-02-06 13:00:13,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835023896] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:13,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:13,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 13:00:13,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027023992] [2025-02-06 13:00:13,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:13,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:00:13,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:13,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:00:13,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:00:13,948 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:13,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 304 transitions, 6536 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 13:00:13,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:13,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:13,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:15,111 INFO L124 PetriNetUnfolderBase]: 4715/9468 cut-off events. [2025-02-06 13:00:15,111 INFO L125 PetriNetUnfolderBase]: For 93324/93324 co-relation queries the response was YES. [2025-02-06 13:00:15,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48092 conditions, 9468 events. 4715/9468 cut-off events. For 93324/93324 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 76557 event pairs, 1545 based on Foata normal form. 110/9532 useless extension candidates. Maximal degree in co-relation 39404. Up to 6688 conditions per place. [2025-02-06 13:00:15,172 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 156 selfloop transitions, 195 changer transitions 1/363 dead transitions. [2025-02-06 13:00:15,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 363 transitions, 7945 flow [2025-02-06 13:00:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:00:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:00:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 274 transitions. [2025-02-06 13:00:15,173 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2025-02-06 13:00:15,173 INFO L175 Difference]: Start difference. First operand has 218 places, 304 transitions, 6536 flow. Second operand 9 states and 274 transitions. [2025-02-06 13:00:15,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 363 transitions, 7945 flow [2025-02-06 13:00:15,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 363 transitions, 7602 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-02-06 13:00:15,549 INFO L231 Difference]: Finished difference. Result has 223 places, 321 transitions, 7076 flow [2025-02-06 13:00:15,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6197, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7076, PETRI_PLACES=223, PETRI_TRANSITIONS=321} [2025-02-06 13:00:15,550 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 177 predicate places. [2025-02-06 13:00:15,550 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 321 transitions, 7076 flow [2025-02-06 13:00:15,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 13:00:15,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:15,551 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:15,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2025-02-06 13:00:15,551 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:15,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:15,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2029928110, now seen corresponding path program 8 times [2025-02-06 13:00:15,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:15,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31145527] [2025-02-06 13:00:15,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:00:15,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:15,556 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:15,561 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:15,561 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:00:15,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:00:15,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31145527] [2025-02-06 13:00:15,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31145527] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:00:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496564038] [2025-02-06 13:00:15,754 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:00:15,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:15,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:15,756 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:15,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-06 13:00:15,805 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:15,822 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:15,823 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:00:15,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:15,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 13:00:15,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:15,968 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-06 13:00:15,968 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 26 treesize of output 10 [2025-02-06 13:00:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:00:15,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:16,064 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-06 13:00:16,064 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 40 treesize of output 56 [2025-02-06 13:00:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:16,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496564038] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:00:16,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:00:16,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 18 [2025-02-06 13:00:16,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142526083] [2025-02-06 13:00:16,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:16,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:16,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:16,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:16,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2025-02-06 13:00:16,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:16,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 321 transitions, 7076 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:16,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:16,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:16,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:17,609 INFO L124 PetriNetUnfolderBase]: 4977/10150 cut-off events. [2025-02-06 13:00:17,610 INFO L125 PetriNetUnfolderBase]: For 117208/117208 co-relation queries the response was YES. [2025-02-06 13:00:17,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53649 conditions, 10150 events. 4977/10150 cut-off events. For 117208/117208 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 83503 event pairs, 868 based on Foata normal form. 110/10236 useless extension candidates. Maximal degree in co-relation 45519. Up to 5981 conditions per place. [2025-02-06 13:00:17,678 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 179 selfloop transitions, 223 changer transitions 0/413 dead transitions. [2025-02-06 13:00:17,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 413 transitions, 8863 flow [2025-02-06 13:00:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 13:00:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 13:00:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 394 transitions. [2025-02-06 13:00:17,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2025-02-06 13:00:17,679 INFO L175 Difference]: Start difference. First operand has 223 places, 321 transitions, 7076 flow. Second operand 13 states and 394 transitions. [2025-02-06 13:00:17,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 413 transitions, 8863 flow [2025-02-06 13:00:18,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 413 transitions, 8629 flow, removed 46 selfloop flow, removed 5 redundant places. [2025-02-06 13:00:18,243 INFO L231 Difference]: Finished difference. Result has 236 places, 347 transitions, 8035 flow [2025-02-06 13:00:18,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6866, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8035, PETRI_PLACES=236, PETRI_TRANSITIONS=347} [2025-02-06 13:00:18,245 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 190 predicate places. [2025-02-06 13:00:18,245 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 347 transitions, 8035 flow [2025-02-06 13:00:18,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:18,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:18,245 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:18,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-06 13:00:18,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-02-06 13:00:18,449 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:18,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2081267818, now seen corresponding path program 3 times [2025-02-06 13:00:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:18,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336683039] [2025-02-06 13:00:18,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:00:18,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:18,454 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:18,457 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 28 statements. [2025-02-06 13:00:18,457 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:00:18,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:18,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:18,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336683039] [2025-02-06 13:00:18,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336683039] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:18,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:18,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:18,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761418105] [2025-02-06 13:00:18,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:18,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:18,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:18,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:18,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:18,629 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:18,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 347 transitions, 8035 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:18,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:18,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:18,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:20,215 INFO L124 PetriNetUnfolderBase]: 5067/10294 cut-off events. [2025-02-06 13:00:20,215 INFO L125 PetriNetUnfolderBase]: For 132720/132720 co-relation queries the response was YES. [2025-02-06 13:00:20,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56884 conditions, 10294 events. 5067/10294 cut-off events. For 132720/132720 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 85168 event pairs, 1414 based on Foata normal form. 45/10287 useless extension candidates. Maximal degree in co-relation 53394. Up to 7870 conditions per place. [2025-02-06 13:00:20,300 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 194 selfloop transitions, 170 changer transitions 6/381 dead transitions. [2025-02-06 13:00:20,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 381 transitions, 9110 flow [2025-02-06 13:00:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2025-02-06 13:00:20,303 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6302083333333334 [2025-02-06 13:00:20,303 INFO L175 Difference]: Start difference. First operand has 236 places, 347 transitions, 8035 flow. Second operand 8 states and 242 transitions. [2025-02-06 13:00:20,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 381 transitions, 9110 flow [2025-02-06 13:00:20,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 381 transitions, 8921 flow, removed 45 selfloop flow, removed 5 redundant places. [2025-02-06 13:00:20,905 INFO L231 Difference]: Finished difference. Result has 239 places, 352 transitions, 8372 flow [2025-02-06 13:00:20,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7852, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8372, PETRI_PLACES=239, PETRI_TRANSITIONS=352} [2025-02-06 13:00:20,907 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 193 predicate places. [2025-02-06 13:00:20,907 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 352 transitions, 8372 flow [2025-02-06 13:00:20,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:20,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:20,907 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:20,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2025-02-06 13:00:20,907 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:20,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:20,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1141230504, now seen corresponding path program 4 times [2025-02-06 13:00:20,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:20,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709554628] [2025-02-06 13:00:20,908 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:00:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:20,912 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:20,916 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:20,916 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:00:20,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:21,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:21,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709554628] [2025-02-06 13:00:21,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709554628] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:00:21,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311108848] [2025-02-06 13:00:21,003 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:00:21,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:21,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:21,006 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:21,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-06 13:00:21,056 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:21,072 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:21,072 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:00:21,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:21,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 13:00:21,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:21,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:21,221 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 29 treesize of output 21 [2025-02-06 13:00:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:00:21,236 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:21,350 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-06 13:00:21,351 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 40 treesize of output 56 [2025-02-06 13:00:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:21,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311108848] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:00:21,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:00:21,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 9] total 19 [2025-02-06 13:00:21,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881302087] [2025-02-06 13:00:21,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:21,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:21,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:21,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:21,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:00:21,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:21,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 352 transitions, 8372 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:21,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:21,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:21,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:23,149 INFO L124 PetriNetUnfolderBase]: 5355/10993 cut-off events. [2025-02-06 13:00:23,149 INFO L125 PetriNetUnfolderBase]: For 127267/127267 co-relation queries the response was YES. [2025-02-06 13:00:23,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59210 conditions, 10993 events. 5355/10993 cut-off events. For 127267/127267 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 92880 event pairs, 1277 based on Foata normal form. 100/11041 useless extension candidates. Maximal degree in co-relation 55734. Up to 7907 conditions per place. [2025-02-06 13:00:23,231 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 210 selfloop transitions, 181 changer transitions 0/402 dead transitions. [2025-02-06 13:00:23,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 402 transitions, 9592 flow [2025-02-06 13:00:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:00:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:00:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 298 transitions. [2025-02-06 13:00:23,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2025-02-06 13:00:23,233 INFO L175 Difference]: Start difference. First operand has 239 places, 352 transitions, 8372 flow. Second operand 10 states and 298 transitions. [2025-02-06 13:00:23,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 402 transitions, 9592 flow [2025-02-06 13:00:23,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 402 transitions, 9159 flow, removed 8 selfloop flow, removed 6 redundant places. [2025-02-06 13:00:23,832 INFO L231 Difference]: Finished difference. Result has 242 places, 361 transitions, 8525 flow [2025-02-06 13:00:23,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7951, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8525, PETRI_PLACES=242, PETRI_TRANSITIONS=361} [2025-02-06 13:00:23,833 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 196 predicate places. [2025-02-06 13:00:23,833 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 361 transitions, 8525 flow [2025-02-06 13:00:23,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:23,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:23,833 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:23,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-02-06 13:00:24,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-02-06 13:00:24,037 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:24,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:24,038 INFO L85 PathProgramCache]: Analyzing trace with hash -14600648, now seen corresponding path program 5 times [2025-02-06 13:00:24,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:24,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72412557] [2025-02-06 13:00:24,038 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:00:24,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:24,041 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:24,046 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:24,046 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:00:24,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:00:24,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72412557] [2025-02-06 13:00:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72412557] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:00:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164213666] [2025-02-06 13:00:24,260 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:00:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:24,265 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:24,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-06 13:00:24,314 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:24,331 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:24,333 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:00:24,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:24,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 13:00:24,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:24,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:24,479 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 29 treesize of output 21 [2025-02-06 13:00:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:00:24,502 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:00:24,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164213666] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:24,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:00:24,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2025-02-06 13:00:24,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948944698] [2025-02-06 13:00:24,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:24,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:00:24,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:24,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:00:24,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-02-06 13:00:24,742 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:24,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 361 transitions, 8525 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 13:00:24,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:24,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:24,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:26,180 INFO L124 PetriNetUnfolderBase]: 5095/10360 cut-off events. [2025-02-06 13:00:26,180 INFO L125 PetriNetUnfolderBase]: For 129689/129689 co-relation queries the response was YES. [2025-02-06 13:00:26,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57136 conditions, 10360 events. 5095/10360 cut-off events. For 129689/129689 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 86086 event pairs, 1396 based on Foata normal form. 45/10351 useless extension candidates. Maximal degree in co-relation 53640. Up to 8061 conditions per place. [2025-02-06 13:00:26,267 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 190 selfloop transitions, 174 changer transitions 4/379 dead transitions. [2025-02-06 13:00:26,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 379 transitions, 9178 flow [2025-02-06 13:00:26,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:00:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:00:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2025-02-06 13:00:26,268 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-02-06 13:00:26,268 INFO L175 Difference]: Start difference. First operand has 242 places, 361 transitions, 8525 flow. Second operand 9 states and 261 transitions. [2025-02-06 13:00:26,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 379 transitions, 9178 flow [2025-02-06 13:00:26,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 379 transitions, 8798 flow, removed 9 selfloop flow, removed 8 redundant places. [2025-02-06 13:00:26,840 INFO L231 Difference]: Finished difference. Result has 242 places, 354 transitions, 8280 flow [2025-02-06 13:00:26,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7942, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8280, PETRI_PLACES=242, PETRI_TRANSITIONS=354} [2025-02-06 13:00:26,841 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 196 predicate places. [2025-02-06 13:00:26,841 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 354 transitions, 8280 flow [2025-02-06 13:00:26,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 13:00:26,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:26,842 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:26,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-02-06 13:00:27,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:27,043 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:27,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:27,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1209975662, now seen corresponding path program 9 times [2025-02-06 13:00:27,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:27,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883777130] [2025-02-06 13:00:27,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:00:27,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:27,048 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:27,051 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 28 statements. [2025-02-06 13:00:27,051 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:00:27,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:27,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:27,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883777130] [2025-02-06 13:00:27,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883777130] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:27,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:27,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:27,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613825524] [2025-02-06 13:00:27,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:27,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:27,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:27,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:27,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:27,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:27,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 354 transitions, 8280 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:27,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:27,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:27,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:28,669 INFO L124 PetriNetUnfolderBase]: 5058/10234 cut-off events. [2025-02-06 13:00:28,669 INFO L125 PetriNetUnfolderBase]: For 129017/129017 co-relation queries the response was YES. [2025-02-06 13:00:28,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57290 conditions, 10234 events. 5058/10234 cut-off events. For 129017/129017 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 84104 event pairs, 1370 based on Foata normal form. 110/10290 useless extension candidates. Maximal degree in co-relation 53794. Up to 7841 conditions per place. [2025-02-06 13:00:28,743 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 197 selfloop transitions, 172 changer transitions 0/380 dead transitions. [2025-02-06 13:00:28,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 380 transitions, 9220 flow [2025-02-06 13:00:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2025-02-06 13:00:28,744 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2025-02-06 13:00:28,744 INFO L175 Difference]: Start difference. First operand has 242 places, 354 transitions, 8280 flow. Second operand 8 states and 244 transitions. [2025-02-06 13:00:28,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 380 transitions, 9220 flow [2025-02-06 13:00:29,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 380 transitions, 8872 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-02-06 13:00:29,263 INFO L231 Difference]: Finished difference. Result has 239 places, 354 transitions, 8337 flow [2025-02-06 13:00:29,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7914, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8337, PETRI_PLACES=239, PETRI_TRANSITIONS=354} [2025-02-06 13:00:29,264 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 193 predicate places. [2025-02-06 13:00:29,264 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 354 transitions, 8337 flow [2025-02-06 13:00:29,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:29,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:29,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:29,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2025-02-06 13:00:29,265 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:29,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:29,266 INFO L85 PathProgramCache]: Analyzing trace with hash -66889150, now seen corresponding path program 10 times [2025-02-06 13:00:29,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:29,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292377665] [2025-02-06 13:00:29,266 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:00:29,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:29,271 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:29,277 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:29,277 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:00:29,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:29,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:29,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292377665] [2025-02-06 13:00:29,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292377665] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:29,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:29,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:29,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72362284] [2025-02-06 13:00:29,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:29,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:29,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:29,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:29,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:29,465 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:29,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 354 transitions, 8337 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:29,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:29,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:29,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:30,830 INFO L124 PetriNetUnfolderBase]: 5022/10182 cut-off events. [2025-02-06 13:00:30,831 INFO L125 PetriNetUnfolderBase]: For 131716/131716 co-relation queries the response was YES. [2025-02-06 13:00:30,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56964 conditions, 10182 events. 5022/10182 cut-off events. For 131716/131716 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 83872 event pairs, 1478 based on Foata normal form. 36/10172 useless extension candidates. Maximal degree in co-relation 53467. Up to 7963 conditions per place. [2025-02-06 13:00:30,892 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 195 selfloop transitions, 154 changer transitions 3/363 dead transitions. [2025-02-06 13:00:30,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 363 transitions, 8860 flow [2025-02-06 13:00:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2025-02-06 13:00:30,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6197916666666666 [2025-02-06 13:00:30,893 INFO L175 Difference]: Start difference. First operand has 239 places, 354 transitions, 8337 flow. Second operand 8 states and 238 transitions. [2025-02-06 13:00:30,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 363 transitions, 8860 flow [2025-02-06 13:00:31,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 8547 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:00:31,396 INFO L231 Difference]: Finished difference. Result has 241 places, 346 transitions, 8120 flow [2025-02-06 13:00:31,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7758, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8120, PETRI_PLACES=241, PETRI_TRANSITIONS=346} [2025-02-06 13:00:31,397 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 195 predicate places. [2025-02-06 13:00:31,397 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 346 transitions, 8120 flow [2025-02-06 13:00:31,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:31,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:31,397 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:31,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2025-02-06 13:00:31,398 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:31,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1117759290, now seen corresponding path program 11 times [2025-02-06 13:00:31,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:31,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321825321] [2025-02-06 13:00:31,398 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:00:31,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:31,402 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:31,408 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:31,408 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:00:31,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:00:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321825321] [2025-02-06 13:00:31,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321825321] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:00:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952762194] [2025-02-06 13:00:31,593 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:00:31,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:31,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:31,599 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:31,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-06 13:00:31,654 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:31,671 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:31,671 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:00:31,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:31,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 13:00:31,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:31,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:31,784 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 29 treesize of output 25 [2025-02-06 13:00:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:00:31,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:31,899 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-02-06 13:00:31,899 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 40 treesize of output 56 [2025-02-06 13:00:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:31,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952762194] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:00:31,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:00:31,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8] total 21 [2025-02-06 13:00:31,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548674469] [2025-02-06 13:00:31,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:31,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:31,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:31,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:31,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2025-02-06 13:00:32,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:32,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 346 transitions, 8120 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:32,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:32,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:32,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:33,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:00:34,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:00:35,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:00:37,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:00:38,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:00:39,932 INFO L124 PetriNetUnfolderBase]: 4894/10028 cut-off events. [2025-02-06 13:00:39,933 INFO L125 PetriNetUnfolderBase]: For 130023/130023 co-relation queries the response was YES. [2025-02-06 13:00:39,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56120 conditions, 10028 events. 4894/10028 cut-off events. For 130023/130023 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 83177 event pairs, 1280 based on Foata normal form. 110/10084 useless extension candidates. Maximal degree in co-relation 52622. Up to 7479 conditions per place. [2025-02-06 13:00:40,006 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 193 selfloop transitions, 180 changer transitions 0/384 dead transitions. [2025-02-06 13:00:40,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 384 transitions, 9080 flow [2025-02-06 13:00:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:00:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:00:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 326 transitions. [2025-02-06 13:00:40,008 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2025-02-06 13:00:40,008 INFO L175 Difference]: Start difference. First operand has 241 places, 346 transitions, 8120 flow. Second operand 11 states and 326 transitions. [2025-02-06 13:00:40,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 384 transitions, 9080 flow [2025-02-06 13:00:40,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 384 transitions, 8829 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-06 13:00:40,562 INFO L231 Difference]: Finished difference. Result has 246 places, 349 transitions, 8290 flow [2025-02-06 13:00:40,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7860, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8290, PETRI_PLACES=246, PETRI_TRANSITIONS=349} [2025-02-06 13:00:40,567 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 200 predicate places. [2025-02-06 13:00:40,567 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 349 transitions, 8290 flow [2025-02-06 13:00:40,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:40,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:40,568 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:40,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-06 13:00:40,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2025-02-06 13:00:40,768 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:40,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash 267313196, now seen corresponding path program 6 times [2025-02-06 13:00:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:40,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505731106] [2025-02-06 13:00:40,769 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:00:40,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:40,778 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:40,782 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 28 statements. [2025-02-06 13:00:40,782 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:00:40,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:40,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:40,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505731106] [2025-02-06 13:00:40,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505731106] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:40,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:40,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298769563] [2025-02-06 13:00:40,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:40,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:40,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:40,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:40,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:40,985 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:40,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 349 transitions, 8290 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:40,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:40,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:40,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:42,517 INFO L124 PetriNetUnfolderBase]: 4894/10084 cut-off events. [2025-02-06 13:00:42,517 INFO L125 PetriNetUnfolderBase]: For 136054/136054 co-relation queries the response was YES. [2025-02-06 13:00:42,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56797 conditions, 10084 events. 4894/10084 cut-off events. For 136054/136054 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 84069 event pairs, 1233 based on Foata normal form. 45/10075 useless extension candidates. Maximal degree in co-relation 53298. Up to 7853 conditions per place. [2025-02-06 13:00:42,575 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 202 selfloop transitions, 151 changer transitions 6/370 dead transitions. [2025-02-06 13:00:42,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 370 transitions, 9097 flow [2025-02-06 13:00:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2025-02-06 13:00:42,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6223958333333334 [2025-02-06 13:00:42,576 INFO L175 Difference]: Start difference. First operand has 246 places, 349 transitions, 8290 flow. Second operand 8 states and 239 transitions. [2025-02-06 13:00:42,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 370 transitions, 9097 flow [2025-02-06 13:00:43,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 370 transitions, 8906 flow, removed 17 selfloop flow, removed 5 redundant places. [2025-02-06 13:00:43,110 INFO L231 Difference]: Finished difference. Result has 249 places, 348 transitions, 8402 flow [2025-02-06 13:00:43,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8099, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8402, PETRI_PLACES=249, PETRI_TRANSITIONS=348} [2025-02-06 13:00:43,112 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 203 predicate places. [2025-02-06 13:00:43,112 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 348 transitions, 8402 flow [2025-02-06 13:00:43,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:43,112 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:43,112 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:43,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2025-02-06 13:00:43,112 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:43,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash 479008828, now seen corresponding path program 7 times [2025-02-06 13:00:43,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:43,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673609846] [2025-02-06 13:00:43,113 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:00:43,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:43,118 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:00:43,122 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:43,122 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:00:43,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:00:43,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:43,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673609846] [2025-02-06 13:00:43,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673609846] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:43,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:43,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 13:00:43,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400029858] [2025-02-06 13:00:43,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:43,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:00:43,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:43,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:00:43,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:00:43,485 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:43,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 348 transitions, 8402 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 13:00:43,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:43,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:43,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:45,219 INFO L124 PetriNetUnfolderBase]: 4831/9972 cut-off events. [2025-02-06 13:00:45,219 INFO L125 PetriNetUnfolderBase]: For 133017/133017 co-relation queries the response was YES. [2025-02-06 13:00:45,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56278 conditions, 9972 events. 4831/9972 cut-off events. For 133017/133017 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 83241 event pairs, 1251 based on Foata normal form. 45/9965 useless extension candidates. Maximal degree in co-relation 52778. Up to 7853 conditions per place. [2025-02-06 13:00:45,282 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 189 selfloop transitions, 161 changer transitions 4/365 dead transitions. [2025-02-06 13:00:45,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 365 transitions, 9173 flow [2025-02-06 13:00:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:00:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:00:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2025-02-06 13:00:45,283 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2025-02-06 13:00:45,283 INFO L175 Difference]: Start difference. First operand has 249 places, 348 transitions, 8402 flow. Second operand 9 states and 260 transitions. [2025-02-06 13:00:45,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 365 transitions, 9173 flow [2025-02-06 13:00:45,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 365 transitions, 8848 flow, removed 4 selfloop flow, removed 7 redundant places. [2025-02-06 13:00:45,768 INFO L231 Difference]: Finished difference. Result has 249 places, 347 transitions, 8394 flow [2025-02-06 13:00:45,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8081, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8394, PETRI_PLACES=249, PETRI_TRANSITIONS=347} [2025-02-06 13:00:45,769 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 203 predicate places. [2025-02-06 13:00:45,772 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 347 transitions, 8394 flow [2025-02-06 13:00:45,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 13:00:45,773 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:45,773 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:45,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2025-02-06 13:00:45,773 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:45,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash 68908794, now seen corresponding path program 8 times [2025-02-06 13:00:45,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:45,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382358825] [2025-02-06 13:00:45,774 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:00:45,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:45,780 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:45,783 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:45,783 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:00:45,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:45,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:45,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382358825] [2025-02-06 13:00:45,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382358825] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:45,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:45,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:45,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776191882] [2025-02-06 13:00:45,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:45,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:45,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:45,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:45,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:45,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:45,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 347 transitions, 8394 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:45,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:45,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:45,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:47,413 INFO L124 PetriNetUnfolderBase]: 4949/10201 cut-off events. [2025-02-06 13:00:47,414 INFO L125 PetriNetUnfolderBase]: For 133622/133622 co-relation queries the response was YES. [2025-02-06 13:00:47,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57766 conditions, 10201 events. 4949/10201 cut-off events. For 133622/133622 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 85398 event pairs, 1269 based on Foata normal form. 100/10249 useless extension candidates. Maximal degree in co-relation 54267. Up to 7935 conditions per place. [2025-02-06 13:00:47,479 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 208 selfloop transitions, 161 changer transitions 0/380 dead transitions. [2025-02-06 13:00:47,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 380 transitions, 9471 flow [2025-02-06 13:00:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2025-02-06 13:00:47,480 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6276041666666666 [2025-02-06 13:00:47,480 INFO L175 Difference]: Start difference. First operand has 249 places, 347 transitions, 8394 flow. Second operand 8 states and 241 transitions. [2025-02-06 13:00:47,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 380 transitions, 9471 flow [2025-02-06 13:00:47,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 380 transitions, 9118 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 13:00:47,987 INFO L231 Difference]: Finished difference. Result has 248 places, 356 transitions, 8587 flow [2025-02-06 13:00:47,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8041, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8587, PETRI_PLACES=248, PETRI_TRANSITIONS=356} [2025-02-06 13:00:47,988 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 202 predicate places. [2025-02-06 13:00:47,988 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 356 transitions, 8587 flow [2025-02-06 13:00:47,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:47,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:47,988 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:47,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2025-02-06 13:00:47,989 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:47,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1931867060, now seen corresponding path program 9 times [2025-02-06 13:00:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:47,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391765712] [2025-02-06 13:00:47,989 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:00:47,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:48,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:48,053 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 28 statements. [2025-02-06 13:00:48,053 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:00:48,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:48,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:48,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391765712] [2025-02-06 13:00:48,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391765712] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:48,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:48,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:48,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293146762] [2025-02-06 13:00:48,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:48,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:48,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:48,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:48,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:48,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:48,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 356 transitions, 8587 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:48,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:48,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:48,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:49,872 INFO L124 PetriNetUnfolderBase]: 5457/11011 cut-off events. [2025-02-06 13:00:49,872 INFO L125 PetriNetUnfolderBase]: For 147488/147488 co-relation queries the response was YES. [2025-02-06 13:00:49,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63150 conditions, 11011 events. 5457/11011 cut-off events. For 147488/147488 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 91444 event pairs, 1199 based on Foata normal form. 100/11059 useless extension candidates. Maximal degree in co-relation 59630. Up to 8045 conditions per place. [2025-02-06 13:00:49,947 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 208 selfloop transitions, 191 changer transitions 0/410 dead transitions. [2025-02-06 13:00:49,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 410 transitions, 10068 flow [2025-02-06 13:00:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2025-02-06 13:00:49,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.640625 [2025-02-06 13:00:49,948 INFO L175 Difference]: Start difference. First operand has 248 places, 356 transitions, 8587 flow. Second operand 8 states and 246 transitions. [2025-02-06 13:00:49,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 410 transitions, 10068 flow [2025-02-06 13:00:50,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 410 transitions, 9725 flow, removed 18 selfloop flow, removed 6 redundant places. [2025-02-06 13:00:50,510 INFO L231 Difference]: Finished difference. Result has 251 places, 377 transitions, 9154 flow [2025-02-06 13:00:50,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8244, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9154, PETRI_PLACES=251, PETRI_TRANSITIONS=377} [2025-02-06 13:00:50,512 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 205 predicate places. [2025-02-06 13:00:50,512 INFO L471 AbstractCegarLoop]: Abstraction has has 251 places, 377 transitions, 9154 flow [2025-02-06 13:00:50,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:50,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:50,512 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:50,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2025-02-06 13:00:50,513 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:50,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash -558112558, now seen corresponding path program 10 times [2025-02-06 13:00:50,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:50,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31631869] [2025-02-06 13:00:50,513 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:00:50,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:50,518 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:00:50,529 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:50,529 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:00:50,529 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:50,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31631869] [2025-02-06 13:00:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31631869] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150047741] [2025-02-06 13:00:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:50,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:50,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:50,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:50,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:50,856 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:50,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 377 transitions, 9154 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:50,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:50,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:50,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:52,405 INFO L124 PetriNetUnfolderBase]: 5357/10994 cut-off events. [2025-02-06 13:00:52,405 INFO L125 PetriNetUnfolderBase]: For 156282/156282 co-relation queries the response was YES. [2025-02-06 13:00:52,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64669 conditions, 10994 events. 5357/10994 cut-off events. For 156282/156282 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 92982 event pairs, 1342 based on Foata normal form. 100/11040 useless extension candidates. Maximal degree in co-relation 61107. Up to 8643 conditions per place. [2025-02-06 13:00:52,493 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 226 selfloop transitions, 163 changer transitions 0/400 dead transitions. [2025-02-06 13:00:52,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 400 transitions, 10071 flow [2025-02-06 13:00:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2025-02-06 13:00:52,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-02-06 13:00:52,495 INFO L175 Difference]: Start difference. First operand has 251 places, 377 transitions, 9154 flow. Second operand 8 states and 240 transitions. [2025-02-06 13:00:52,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 400 transitions, 10071 flow [2025-02-06 13:00:53,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 400 transitions, 9671 flow, removed 48 selfloop flow, removed 5 redundant places. [2025-02-06 13:00:53,212 INFO L231 Difference]: Finished difference. Result has 253 places, 376 transitions, 9069 flow [2025-02-06 13:00:53,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8743, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9069, PETRI_PLACES=253, PETRI_TRANSITIONS=376} [2025-02-06 13:00:53,213 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 207 predicate places. [2025-02-06 13:00:53,213 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 376 transitions, 9069 flow [2025-02-06 13:00:53,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:53,213 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:53,213 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:53,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2025-02-06 13:00:53,214 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:53,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1999413588, now seen corresponding path program 11 times [2025-02-06 13:00:53,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:53,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494384177] [2025-02-06 13:00:53,214 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:00:53,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:53,222 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:53,228 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:53,228 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:00:53,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:00:53,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:53,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494384177] [2025-02-06 13:00:53,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494384177] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:00:53,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346703015] [2025-02-06 13:00:53,488 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:00:53,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:53,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:53,490 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:53,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-06 13:00:53,554 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:53,575 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:53,575 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:00:53,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:53,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 13:00:53,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:53,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:53,762 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 29 treesize of output 21 [2025-02-06 13:00:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:00:53,786 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:00:53,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346703015] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:53,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:00:53,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2025-02-06 13:00:53,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756075908] [2025-02-06 13:00:53,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:53,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:00:53,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:53,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:00:53,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-02-06 13:00:53,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:53,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 376 transitions, 9069 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 13:00:53,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:53,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:53,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:56,014 INFO L124 PetriNetUnfolderBase]: 5312/10968 cut-off events. [2025-02-06 13:00:56,015 INFO L125 PetriNetUnfolderBase]: For 150741/150741 co-relation queries the response was YES. [2025-02-06 13:00:56,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63308 conditions, 10968 events. 5312/10968 cut-off events. For 150741/150741 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 93277 event pairs, 1329 based on Foata normal form. 45/10959 useless extension candidates. Maximal degree in co-relation 59746. Up to 8752 conditions per place. [2025-02-06 13:00:56,092 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 216 selfloop transitions, 156 changer transitions 4/387 dead transitions. [2025-02-06 13:00:56,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 387 transitions, 9683 flow [2025-02-06 13:00:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:00:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:00:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2025-02-06 13:00:56,093 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2025-02-06 13:00:56,093 INFO L175 Difference]: Start difference. First operand has 253 places, 376 transitions, 9069 flow. Second operand 9 states and 258 transitions. [2025-02-06 13:00:56,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 387 transitions, 9683 flow [2025-02-06 13:00:56,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 387 transitions, 9348 flow, removed 18 selfloop flow, removed 6 redundant places. [2025-02-06 13:00:56,694 INFO L231 Difference]: Finished difference. Result has 255 places, 369 transitions, 8840 flow [2025-02-06 13:00:56,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8537, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8840, PETRI_PLACES=255, PETRI_TRANSITIONS=369} [2025-02-06 13:00:56,695 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 209 predicate places. [2025-02-06 13:00:56,695 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 369 transitions, 8840 flow [2025-02-06 13:00:56,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 13:00:56,695 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:56,695 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:56,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-02-06 13:00:56,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2025-02-06 13:00:56,896 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:56,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:56,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1896361238, now seen corresponding path program 12 times [2025-02-06 13:00:56,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:56,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166671507] [2025-02-06 13:00:56,897 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:00:56,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:56,901 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 4 equivalence classes. [2025-02-06 13:00:56,904 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 28 statements. [2025-02-06 13:00:56,904 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:00:56,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:00:56,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:56,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166671507] [2025-02-06 13:00:56,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166671507] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:56,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:56,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:00:56,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292245851] [2025-02-06 13:00:56,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:56,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:00:56,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:56,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:00:56,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:00:57,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:57,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 369 transitions, 8840 flow. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:57,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:57,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:57,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:58,562 INFO L124 PetriNetUnfolderBase]: 5474/11246 cut-off events. [2025-02-06 13:00:58,563 INFO L125 PetriNetUnfolderBase]: For 159324/159387 co-relation queries the response was YES. [2025-02-06 13:00:58,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65658 conditions, 11246 events. 5474/11246 cut-off events. For 159324/159387 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 95270 event pairs, 1368 based on Foata normal form. 36/11221 useless extension candidates. Maximal degree in co-relation 60453. Up to 8842 conditions per place. [2025-02-06 13:00:58,816 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 227 selfloop transitions, 180 changer transitions 8/426 dead transitions. [2025-02-06 13:00:58,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 426 transitions, 10930 flow [2025-02-06 13:00:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:00:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:00:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2025-02-06 13:00:58,818 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6197916666666666 [2025-02-06 13:00:58,818 INFO L175 Difference]: Start difference. First operand has 255 places, 369 transitions, 8840 flow. Second operand 8 states and 238 transitions. [2025-02-06 13:00:58,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 426 transitions, 10930 flow [2025-02-06 13:00:59,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 426 transitions, 10578 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:00:59,442 INFO L231 Difference]: Finished difference. Result has 257 places, 403 transitions, 10112 flow [2025-02-06 13:00:59,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8556, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10112, PETRI_PLACES=257, PETRI_TRANSITIONS=403} [2025-02-06 13:00:59,443 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 211 predicate places. [2025-02-06 13:00:59,443 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 403 transitions, 10112 flow [2025-02-06 13:00:59,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 13:00:59,443 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:59,443 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:59,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2025-02-06 13:00:59,443 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2025-02-06 13:00:59,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1377429152, now seen corresponding path program 13 times [2025-02-06 13:00:59,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:00:59,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613290745] [2025-02-06 13:00:59,444 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:00:59,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:00:59,448 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:00:59,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:00:59,451 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:00:59,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:00:59,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:00:59,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613290745] [2025-02-06 13:00:59,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613290745] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:00:59,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:00:59,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 13:00:59,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400878363] [2025-02-06 13:00:59,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:00:59,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:00:59,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:00:59,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:00:59,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:00:59,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 13:00:59,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 403 transitions, 10112 flow. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 13:00:59,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:59,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 13:00:59,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand