./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:05:55,179 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:05:55,246 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:05:55,251 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:05:55,252 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:05:55,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:05:55,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:05:55,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:05:55,281 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:05:55,281 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:05:55,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:05:55,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:05:55,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:05:55,282 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:05:55,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:05:55,283 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:05:55,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:05:55,284 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:05:55,284 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:05:55,284 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:05:55,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:05:55,284 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:05:55,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:05:55,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:05:55,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:05:55,284 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 -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2025-02-06 13:05:55,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:05:55,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:05:55,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:05:55,552 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:05:55,552 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:05:55,553 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-02-06 13:05:56,854 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bbdddec41/8ec6edf69e8f418097e98181b747bb95/FLAGbf7d487be [2025-02-06 13:05:57,094 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:05:57,094 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-02-06 13:05:57,103 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bbdddec41/8ec6edf69e8f418097e98181b747bb95/FLAGbf7d487be [2025-02-06 13:05:57,120 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bbdddec41/8ec6edf69e8f418097e98181b747bb95 [2025-02-06 13:05:57,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:05:57,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:05:57,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:05:57,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:05:57,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:05:57,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,132 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e0a1a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57, skipping insertion in model container [2025-02-06 13:05:57,132 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,146 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:05:57,285 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:05:57,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:05:57,303 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:05:57,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:05:57,339 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:05:57,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57 WrapperNode [2025-02-06 13:05:57,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:05:57,341 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:05:57,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:05:57,341 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:05:57,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,354 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,370 INFO L138 Inliner]: procedures = 25, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 125 [2025-02-06 13:05:57,371 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:05:57,371 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:05:57,371 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:05:57,371 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:05:57,377 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,379 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,397 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 13:05:57,398 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,398 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,404 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,409 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,410 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,410 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,411 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:05:57,412 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:05:57,412 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:05:57,412 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:05:57,414 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (1/1) ... [2025-02-06 13:05:57,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:05:57,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:57,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:05:57,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:05:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:05:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:05:57,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:05:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:05:57,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:05:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:05:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:05:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:05:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:05:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:05:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:05:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:05:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:05:57,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:05:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:05:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:05:57,470 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:05:57,553 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:05:57,554 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:05:57,800 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:05:57,801 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:05:58,030 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:05:58,030 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:05:58,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:05:58 BoogieIcfgContainer [2025-02-06 13:05:58,031 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:05:58,033 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:05:58,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:05:58,037 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:05:58,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:05:57" (1/3) ... [2025-02-06 13:05:58,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d82054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:05:58, skipping insertion in model container [2025-02-06 13:05:58,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:05:57" (2/3) ... [2025-02-06 13:05:58,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d82054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:05:58, skipping insertion in model container [2025-02-06 13:05:58,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:05:58" (3/3) ... [2025-02-06 13:05:58,039 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2025-02-06 13:05:58,050 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:05:58,052 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue2.wvr.c that has 3 procedures, 31 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-02-06 13:05:58,052 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:05:58,093 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:05:58,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 80 flow [2025-02-06 13:05:58,149 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2025-02-06 13:05:58,152 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:05:58,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 3/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 46 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-02-06 13:05:58,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 80 flow [2025-02-06 13:05:58,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 30 transitions, 72 flow [2025-02-06 13:05:58,164 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:05:58,172 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;@43079c7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:05:58,172 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-02-06 13:05:58,175 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:05:58,175 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:05:58,176 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:05:58,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:58,176 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:05:58,177 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:58,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash 386387, now seen corresponding path program 1 times [2025-02-06 13:05:58,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:58,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529721400] [2025-02-06 13:05:58,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:58,275 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:05:58,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:05:58,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:58,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:58,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:58,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529721400] [2025-02-06 13:05:58,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529721400] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:58,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:58,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:05:58,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730413967] [2025-02-06 13:05:58,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:58,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:05:58,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:58,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:05:58,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:05:58,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:05:58,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 13:05:58,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:58,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:05:58,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:58,521 INFO L124 PetriNetUnfolderBase]: 128/233 cut-off events. [2025-02-06 13:05:58,521 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-02-06 13:05:58,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 233 events. 128/233 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 969 event pairs, 100 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 428. Up to 221 conditions per place. [2025-02-06 13:05:58,525 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 21 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2025-02-06 13:05:58,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 112 flow [2025-02-06 13:05:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:05:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:05:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2025-02-06 13:05:58,539 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2025-02-06 13:05:58,541 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 46 transitions. [2025-02-06 13:05:58,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 112 flow [2025-02-06 13:05:58,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:05:58,549 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 62 flow [2025-02-06 13:05:58,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2025-02-06 13:05:58,555 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2025-02-06 13:05:58,556 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 62 flow [2025-02-06 13:05:58,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 13:05:58,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:58,556 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:05:58,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:05:58,557 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:58,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:58,557 INFO L85 PathProgramCache]: Analyzing trace with hash 386388, now seen corresponding path program 1 times [2025-02-06 13:05:58,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:58,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877562936] [2025-02-06 13:05:58,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:58,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:58,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:05:58,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:05:58,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:58,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:58,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:58,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877562936] [2025-02-06 13:05:58,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877562936] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:05:58,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:05:58,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:05:58,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124100459] [2025-02-06 13:05:58,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:05:58,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:05:58,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:58,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:05:58,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:05:58,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:05:58,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 13:05:58,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:58,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:05:58,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:05:58,981 INFO L124 PetriNetUnfolderBase]: 129/236 cut-off events. [2025-02-06 13:05:58,982 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 13:05:58,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 236 events. 129/236 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 970 event pairs, 100 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 454. Up to 226 conditions per place. [2025-02-06 13:05:58,983 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 23 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2025-02-06 13:05:58,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2025-02-06 13:05:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:05:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:05:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2025-02-06 13:05:58,985 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2025-02-06 13:05:58,985 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 62 flow. Second operand 4 states and 56 transitions. [2025-02-06 13:05:58,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2025-02-06 13:05:58,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:05:58,987 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 85 flow [2025-02-06 13:05:58,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=85, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2025-02-06 13:05:58,987 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2025-02-06 13:05:58,987 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 85 flow [2025-02-06 13:05:58,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 13:05:58,987 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:05:58,987 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:05:58,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:05:58,988 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:05:58,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:05:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash 371331427, now seen corresponding path program 1 times [2025-02-06 13:05:58,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:05:58,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899638121] [2025-02-06 13:05:58,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:58,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:05:58,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:05:59,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:05:59,013 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:59,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:59,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:05:59,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899638121] [2025-02-06 13:05:59,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899638121] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:05:59,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246281625] [2025-02-06 13:05:59,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:05:59,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:05:59,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:05:59,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:05:59,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:05:59,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:05:59,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:05:59,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:05:59,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:05:59,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:05:59,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:05:59,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:05:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:59,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:05:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:05:59,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246281625] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:05:59,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:05:59,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:05:59,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735229502] [2025-02-06 13:05:59,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:05:59,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:05:59,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:05:59,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:05:59,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:05:59,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:05:59,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 85 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 13:05:59,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:05:59,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:05:59,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:00,076 INFO L124 PetriNetUnfolderBase]: 129/235 cut-off events. [2025-02-06 13:06:00,076 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 13:06:00,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 235 events. 129/235 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 972 event pairs, 100 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 461. Up to 222 conditions per place. [2025-02-06 13:06:00,078 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 19 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2025-02-06 13:06:00,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 133 flow [2025-02-06 13:06:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:06:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:06:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2025-02-06 13:06:00,081 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2025-02-06 13:06:00,081 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 85 flow. Second operand 6 states and 69 transitions. [2025-02-06 13:06:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 133 flow [2025-02-06 13:06:00,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:00,082 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 92 flow [2025-02-06 13:06:00,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2025-02-06 13:06:00,083 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2025-02-06 13:06:00,083 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 92 flow [2025-02-06 13:06:00,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 13:06:00,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:00,083 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:06:00,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:06:00,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:00,288 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:00,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:00,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1371413225, now seen corresponding path program 1 times [2025-02-06 13:06:00,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:00,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837671838] [2025-02-06 13:06:00,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:00,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:00,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:06:00,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:06:00,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:00,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:00,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:00,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837671838] [2025-02-06 13:06:00,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837671838] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:00,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:00,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:00,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361304329] [2025-02-06 13:06:00,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:00,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:00,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:00,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:00,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:00,353 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:06:00,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 13:06:00,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:00,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:06:00,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:00,408 INFO L124 PetriNetUnfolderBase]: 93/173 cut-off events. [2025-02-06 13:06:00,408 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 13:06:00,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 173 events. 93/173 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 606 event pairs, 68 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 338. Up to 160 conditions per place. [2025-02-06 13:06:00,410 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2025-02-06 13:06:00,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 27 transitions, 136 flow [2025-02-06 13:06:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2025-02-06 13:06:00,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2025-02-06 13:06:00,412 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 92 flow. Second operand 4 states and 51 transitions. [2025-02-06 13:06:00,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 27 transitions, 136 flow [2025-02-06 13:06:00,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 106 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-06 13:06:00,414 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 64 flow [2025-02-06 13:06:00,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2025-02-06 13:06:00,416 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2025-02-06 13:06:00,417 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 64 flow [2025-02-06 13:06:00,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 13:06:00,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:00,417 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:06:00,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:06:00,417 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:00,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:00,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1371413224, now seen corresponding path program 1 times [2025-02-06 13:06:00,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:00,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491329888] [2025-02-06 13:06:00,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:00,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:00,422 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:06:00,425 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:06:00,426 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:00,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:00,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:00,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491329888] [2025-02-06 13:06:00,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491329888] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:00,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:00,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:06:00,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530340122] [2025-02-06 13:06:00,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:00,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:00,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:00,483 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:00,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:00,497 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:06:00,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 13:06:00,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:00,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:06:00,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:00,593 INFO L124 PetriNetUnfolderBase]: 154/290 cut-off events. [2025-02-06 13:06:00,594 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:06:00,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 290 events. 154/290 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1171 event pairs, 106 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 386. Up to 192 conditions per place. [2025-02-06 13:06:00,596 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 42 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2025-02-06 13:06:00,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 207 flow [2025-02-06 13:06:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2025-02-06 13:06:00,598 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2025-02-06 13:06:00,599 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 64 flow. Second operand 5 states and 83 transitions. [2025-02-06 13:06:00,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 207 flow [2025-02-06 13:06:00,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:00,600 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 85 flow [2025-02-06 13:06:00,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=85, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2025-02-06 13:06:00,601 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2025-02-06 13:06:00,601 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 85 flow [2025-02-06 13:06:00,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 13:06:00,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:00,601 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:00,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:06:00,601 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:00,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1498608983, now seen corresponding path program 1 times [2025-02-06 13:06:00,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:00,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984470733] [2025-02-06 13:06:00,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:00,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:00,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:06:00,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:06:00,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:00,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:00,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:00,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984470733] [2025-02-06 13:06:00,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984470733] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:00,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205995163] [2025-02-06 13:06:00,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:00,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:00,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:00,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:06:00,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:06:00,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:06:00,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:00,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:00,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:06:00,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:00,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:06:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:00,920 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:00,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205995163] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:00,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:00,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2025-02-06 13:06:00,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564336615] [2025-02-06 13:06:00,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:00,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:00,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:00,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:00,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:06:01,022 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-02-06 13:06:01,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 85 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:01,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:01,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-02-06 13:06:01,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:01,180 INFO L124 PetriNetUnfolderBase]: 166/317 cut-off events. [2025-02-06 13:06:01,180 INFO L125 PetriNetUnfolderBase]: For 87/96 co-relation queries the response was YES. [2025-02-06 13:06:01,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 317 events. 166/317 cut-off events. For 87/96 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1294 event pairs, 91 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 481. Up to 130 conditions per place. [2025-02-06 13:06:01,184 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 40 selfloop transitions, 8 changer transitions 0/51 dead transitions. [2025-02-06 13:06:01,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 51 transitions, 232 flow [2025-02-06 13:06:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:06:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:06:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2025-02-06 13:06:01,186 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2025-02-06 13:06:01,187 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 85 flow. Second operand 6 states and 97 transitions. [2025-02-06 13:06:01,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 51 transitions, 232 flow [2025-02-06 13:06:01,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:01,188 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 117 flow [2025-02-06 13:06:01,188 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2025-02-06 13:06:01,189 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2025-02-06 13:06:01,189 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 117 flow [2025-02-06 13:06:01,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:01,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:01,189 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:01,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:01,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:01,390 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:01,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash 624513165, now seen corresponding path program 1 times [2025-02-06 13:06:01,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:01,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110527531] [2025-02-06 13:06:01,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:01,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:01,395 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:06:01,398 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:06:01,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:01,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:01,456 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 13:06:01,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:01,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110527531] [2025-02-06 13:06:01,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110527531] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:01,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:01,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:06:01,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086386058] [2025-02-06 13:06:01,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:01,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:01,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:01,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:01,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:01,470 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:06:01,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 13:06:01,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:01,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:06:01,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:01,571 INFO L124 PetriNetUnfolderBase]: 164/305 cut-off events. [2025-02-06 13:06:01,571 INFO L125 PetriNetUnfolderBase]: For 338/353 co-relation queries the response was YES. [2025-02-06 13:06:01,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 305 events. 164/305 cut-off events. For 338/353 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1075 event pairs, 114 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 694. Up to 238 conditions per place. [2025-02-06 13:06:01,574 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 37 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2025-02-06 13:06:01,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 240 flow [2025-02-06 13:06:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2025-02-06 13:06:01,575 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2025-02-06 13:06:01,575 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 117 flow. Second operand 5 states and 76 transitions. [2025-02-06 13:06:01,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 240 flow [2025-02-06 13:06:01,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 226 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:01,577 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 130 flow [2025-02-06 13:06:01,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2025-02-06 13:06:01,579 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2025-02-06 13:06:01,580 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 130 flow [2025-02-06 13:06:01,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 13:06:01,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:01,580 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:01,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:06:01,580 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:01,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:01,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1351526946, now seen corresponding path program 1 times [2025-02-06 13:06:01,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:01,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093660127] [2025-02-06 13:06:01,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:01,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:01,587 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:06:01,591 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:06:01,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:01,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:01,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:01,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093660127] [2025-02-06 13:06:01,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093660127] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:01,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009733525] [2025-02-06 13:06:01,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:01,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:01,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:01,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:01,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:06:01,740 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:06:01,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:06:01,751 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:01,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:01,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:06:01,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:01,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:01,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-06 13:06:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:01,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009733525] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:01,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:01,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-02-06 13:06:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327019102] [2025-02-06 13:06:01,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:01,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:06:01,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:01,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:06:01,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:06:01,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-02-06 13:06:01,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 130 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 13:06:01,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:01,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-02-06 13:06:01,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:02,124 INFO L124 PetriNetUnfolderBase]: 198/372 cut-off events. [2025-02-06 13:06:02,126 INFO L125 PetriNetUnfolderBase]: For 377/400 co-relation queries the response was YES. [2025-02-06 13:06:02,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 372 events. 198/372 cut-off events. For 377/400 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1385 event pairs, 88 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 887. Up to 179 conditions per place. [2025-02-06 13:06:02,129 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 49 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2025-02-06 13:06:02,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 362 flow [2025-02-06 13:06:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:06:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:06:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2025-02-06 13:06:02,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47186147186147187 [2025-02-06 13:06:02,131 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 130 flow. Second operand 7 states and 109 transitions. [2025-02-06 13:06:02,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 362 flow [2025-02-06 13:06:02,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:02,134 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 166 flow [2025-02-06 13:06:02,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=166, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2025-02-06 13:06:02,135 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2025-02-06 13:06:02,136 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 166 flow [2025-02-06 13:06:02,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 13:06:02,136 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:02,136 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:02,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 13:06:02,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:02,337 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:02,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1125234355, now seen corresponding path program 1 times [2025-02-06 13:06:02,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:02,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340769266] [2025-02-06 13:06:02,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:02,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:02,346 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:06:02,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:06:02,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:02,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:02,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:02,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340769266] [2025-02-06 13:06:02,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340769266] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:02,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857431098] [2025-02-06 13:06:02,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:02,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:02,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:02,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:02,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:06:02,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:06:02,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:06:02,499 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:02,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:02,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:02,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:02,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:02,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857431098] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:02,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:02,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:06:02,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492734394] [2025-02-06 13:06:02,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:02,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:06:02,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:02,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:06:02,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:06:02,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:06:02,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 166 flow. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 13:06:02,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:02,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:06:02,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:02,877 INFO L124 PetriNetUnfolderBase]: 407/726 cut-off events. [2025-02-06 13:06:02,877 INFO L125 PetriNetUnfolderBase]: For 903/923 co-relation queries the response was YES. [2025-02-06 13:06:02,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 726 events. 407/726 cut-off events. For 903/923 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3081 event pairs, 205 based on Foata normal form. 16/742 useless extension candidates. Maximal degree in co-relation 1283. Up to 366 conditions per place. [2025-02-06 13:06:02,882 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 69 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2025-02-06 13:06:02,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 84 transitions, 558 flow [2025-02-06 13:06:02,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:06:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:06:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2025-02-06 13:06:02,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2025-02-06 13:06:02,884 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 166 flow. Second operand 8 states and 119 transitions. [2025-02-06 13:06:02,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 84 transitions, 558 flow [2025-02-06 13:06:02,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 84 transitions, 537 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:02,887 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 252 flow [2025-02-06 13:06:02,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=252, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2025-02-06 13:06:02,887 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2025-02-06 13:06:02,887 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 252 flow [2025-02-06 13:06:02,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 13:06:02,888 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:02,888 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:02,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:03,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-06 13:06:03,088 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:03,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1979563653, now seen corresponding path program 1 times [2025-02-06 13:06:03,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:03,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098956423] [2025-02-06 13:06:03,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:03,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:03,096 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:06:03,100 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:06:03,100 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:03,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:03,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098956423] [2025-02-06 13:06:03,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098956423] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001692483] [2025-02-06 13:06:03,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:03,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:03,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:03,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:03,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 13:06:03,199 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:06:03,212 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:06:03,212 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:03,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:03,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:03,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:03,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:03,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001692483] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:03,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:03,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:06:03,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062088451] [2025-02-06 13:06:03,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:03,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:06:03,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:03,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:06:03,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:06:03,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:06:03,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 252 flow. Second operand has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 13:06:03,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:03,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:06:03,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:03,502 INFO L124 PetriNetUnfolderBase]: 347/608 cut-off events. [2025-02-06 13:06:03,503 INFO L125 PetriNetUnfolderBase]: For 1487/1543 co-relation queries the response was YES. [2025-02-06 13:06:03,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2274 conditions, 608 events. 347/608 cut-off events. For 1487/1543 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2400 event pairs, 191 based on Foata normal form. 11/618 useless extension candidates. Maximal degree in co-relation 1282. Up to 352 conditions per place. [2025-02-06 13:06:03,509 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 58 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2025-02-06 13:06:03,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 570 flow [2025-02-06 13:06:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:06:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:06:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2025-02-06 13:06:03,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2025-02-06 13:06:03,512 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 252 flow. Second operand 8 states and 114 transitions. [2025-02-06 13:06:03,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 570 flow [2025-02-06 13:06:03,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 555 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:03,518 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 321 flow [2025-02-06 13:06:03,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=321, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2025-02-06 13:06:03,518 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2025-02-06 13:06:03,518 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 321 flow [2025-02-06 13:06:03,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 13:06:03,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:03,519 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:03,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:03,719 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,SelfDestructingSolverStorable9 [2025-02-06 13:06:03,719 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:03,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:03,719 INFO L85 PathProgramCache]: Analyzing trace with hash -263953470, now seen corresponding path program 2 times [2025-02-06 13:06:03,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:03,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449960042] [2025-02-06 13:06:03,720 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:03,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:03,725 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-06 13:06:03,734 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:06:03,734 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:03,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:06:03,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:03,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449960042] [2025-02-06 13:06:03,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449960042] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:03,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761768469] [2025-02-06 13:06:03,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:03,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:03,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:03,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:03,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:06:03,946 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-06 13:06:03,958 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:06:03,958 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:03,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:03,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 13:06:03,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:03,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:06:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:04,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:04,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761768469] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:04,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:04,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-02-06 13:06:04,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464407772] [2025-02-06 13:06:04,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:04,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:06:04,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:04,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:06:04,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:06:04,305 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-06 13:06:04,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 321 flow. Second operand has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:04,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:04,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-06 13:06:04,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:04,939 INFO L124 PetriNetUnfolderBase]: 447/765 cut-off events. [2025-02-06 13:06:04,939 INFO L125 PetriNetUnfolderBase]: For 2014/2085 co-relation queries the response was YES. [2025-02-06 13:06:04,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 765 events. 447/765 cut-off events. For 2014/2085 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3093 event pairs, 69 based on Foata normal form. 32/796 useless extension candidates. Maximal degree in co-relation 1990. Up to 132 conditions per place. [2025-02-06 13:06:04,944 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 109 selfloop transitions, 21 changer transitions 0/132 dead transitions. [2025-02-06 13:06:04,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 132 transitions, 1064 flow [2025-02-06 13:06:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:06:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:06:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 191 transitions. [2025-02-06 13:06:04,946 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2025-02-06 13:06:04,946 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 321 flow. Second operand 14 states and 191 transitions. [2025-02-06 13:06:04,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 132 transitions, 1064 flow [2025-02-06 13:06:04,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 132 transitions, 1036 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:04,951 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 392 flow [2025-02-06 13:06:04,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=392, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2025-02-06 13:06:04,951 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2025-02-06 13:06:04,951 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 392 flow [2025-02-06 13:06:04,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:04,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:04,951 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:04,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:05,152 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,SelfDestructingSolverStorable10 [2025-02-06 13:06:05,153 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:05,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:05,153 INFO L85 PathProgramCache]: Analyzing trace with hash 392184124, now seen corresponding path program 1 times [2025-02-06 13:06:05,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:05,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717213671] [2025-02-06 13:06:05,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:05,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:05,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:06:05,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:06:05,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:05,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:05,175 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 13:06:05,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:05,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717213671] [2025-02-06 13:06:05,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717213671] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:05,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:05,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:05,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601712085] [2025-02-06 13:06:05,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:05,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:06:05,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:05,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:06:05,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:06:05,177 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-02-06 13:06:05,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 13:06:05,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:05,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-02-06 13:06:05,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:05,277 INFO L124 PetriNetUnfolderBase]: 375/708 cut-off events. [2025-02-06 13:06:05,278 INFO L125 PetriNetUnfolderBase]: For 2957/3029 co-relation queries the response was YES. [2025-02-06 13:06:05,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3128 conditions, 708 events. 375/708 cut-off events. For 2957/3029 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2978 event pairs, 102 based on Foata normal form. 3/710 useless extension candidates. Maximal degree in co-relation 1936. Up to 489 conditions per place. [2025-02-06 13:06:05,286 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 52 selfloop transitions, 3 changer transitions 6/66 dead transitions. [2025-02-06 13:06:05,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 66 transitions, 625 flow [2025-02-06 13:06:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:06:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:06:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2025-02-06 13:06:05,287 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2025-02-06 13:06:05,287 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 392 flow. Second operand 3 states and 56 transitions. [2025-02-06 13:06:05,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 66 transitions, 625 flow [2025-02-06 13:06:05,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 553 flow, removed 14 selfloop flow, removed 9 redundant places. [2025-02-06 13:06:05,293 INFO L231 Difference]: Finished difference. Result has 67 places, 48 transitions, 313 flow [2025-02-06 13:06:05,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2025-02-06 13:06:05,295 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2025-02-06 13:06:05,295 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 313 flow [2025-02-06 13:06:05,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 13:06:05,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:05,295 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:05,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 13:06:05,295 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:05,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1590074412, now seen corresponding path program 2 times [2025-02-06 13:06:05,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:05,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115756527] [2025-02-06 13:06:05,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:05,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:05,303 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-06 13:06:05,310 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:06:05,310 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:05,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:06:05,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:05,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115756527] [2025-02-06 13:06:05,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115756527] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:05,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735967485] [2025-02-06 13:06:05,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:05,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:05,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:05,460 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:05,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:06:05,499 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-06 13:06:05,511 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:06:05,511 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:05,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:05,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 13:06:05,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:05,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:05,709 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 24 treesize of output 20 [2025-02-06 13:06:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:05,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735967485] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:05,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:05,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-02-06 13:06:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617757344] [2025-02-06 13:06:05,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:05,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:06:05,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:05,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:06:05,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:06:05,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:06:05,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 313 flow. Second operand has 20 states, 20 states have (on average 9.2) internal successors, (184), 20 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 13:06:05,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:05,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:06:05,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:06,416 INFO L124 PetriNetUnfolderBase]: 506/851 cut-off events. [2025-02-06 13:06:06,416 INFO L125 PetriNetUnfolderBase]: For 2483/2557 co-relation queries the response was YES. [2025-02-06 13:06:06,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3528 conditions, 851 events. 506/851 cut-off events. For 2483/2557 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3434 event pairs, 92 based on Foata normal form. 34/883 useless extension candidates. Maximal degree in co-relation 2541. Up to 167 conditions per place. [2025-02-06 13:06:06,421 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 109 selfloop transitions, 18 changer transitions 0/131 dead transitions. [2025-02-06 13:06:06,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 131 transitions, 1099 flow [2025-02-06 13:06:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:06:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:06:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 192 transitions. [2025-02-06 13:06:06,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2025-02-06 13:06:06,423 INFO L175 Difference]: Start difference. First operand has 67 places, 48 transitions, 313 flow. Second operand 14 states and 192 transitions. [2025-02-06 13:06:06,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 131 transitions, 1099 flow [2025-02-06 13:06:06,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 131 transitions, 1001 flow, removed 24 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:06,428 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 345 flow [2025-02-06 13:06:06,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=345, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2025-02-06 13:06:06,428 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2025-02-06 13:06:06,428 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 345 flow [2025-02-06 13:06:06,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.2) internal successors, (184), 20 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 13:06:06,429 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:06,429 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:06,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:06,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:06,633 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:06,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash 367869208, now seen corresponding path program 1 times [2025-02-06 13:06:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:06,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281524119] [2025-02-06 13:06:06,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:06,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:06:06,643 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:06:06,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:06,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:06,709 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 13:06:06,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:06,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281524119] [2025-02-06 13:06:06,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281524119] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:06,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705659608] [2025-02-06 13:06:06,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:06,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:06,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:06,711 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:06,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 13:06:06,751 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:06:06,763 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:06:06,763 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:06,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:06,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:06:06,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:06,790 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 13:06:06,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:06,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705659608] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:06,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:06,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-06 13:06:06,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603027797] [2025-02-06 13:06:06,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:06,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:06,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:06,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:06,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:06:06,827 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:06:06,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 345 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 13:06:06,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:06,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:06:06,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:06,919 INFO L124 PetriNetUnfolderBase]: 462/808 cut-off events. [2025-02-06 13:06:06,920 INFO L125 PetriNetUnfolderBase]: For 2455/2468 co-relation queries the response was YES. [2025-02-06 13:06:06,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3351 conditions, 808 events. 462/808 cut-off events. For 2455/2468 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3304 event pairs, 130 based on Foata normal form. 34/824 useless extension candidates. Maximal degree in co-relation 2490. Up to 439 conditions per place. [2025-02-06 13:06:06,925 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 53 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2025-02-06 13:06:06,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 597 flow [2025-02-06 13:06:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:06,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2025-02-06 13:06:06,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2025-02-06 13:06:06,926 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 345 flow. Second operand 5 states and 65 transitions. [2025-02-06 13:06:06,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 597 flow [2025-02-06 13:06:06,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 67 transitions, 505 flow, removed 15 selfloop flow, removed 11 redundant places. [2025-02-06 13:06:06,932 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 315 flow [2025-02-06 13:06:06,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2025-02-06 13:06:06,933 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2025-02-06 13:06:06,933 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 315 flow [2025-02-06 13:06:06,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 13:06:06,933 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:06,933 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:06,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:07,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:07,134 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:07,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:07,134 INFO L85 PathProgramCache]: Analyzing trace with hash -401551141, now seen corresponding path program 1 times [2025-02-06 13:06:07,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:07,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487635018] [2025-02-06 13:06:07,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:07,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:07,139 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:06:07,144 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:06:07,146 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:07,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:07,207 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 13:06:07,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:07,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487635018] [2025-02-06 13:06:07,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487635018] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:07,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217523571] [2025-02-06 13:06:07,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:07,210 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:07,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 13:06:07,251 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:06:07,265 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:06:07,265 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:07,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:07,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:06:07,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:07,297 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 13:06:07,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:07,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217523571] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:07,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:07,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-06 13:06:07,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618661072] [2025-02-06 13:06:07,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:07,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:07,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:07,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:07,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:06:07,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:06:07,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 315 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 13:06:07,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:07,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:06:07,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:07,432 INFO L124 PetriNetUnfolderBase]: 416/730 cut-off events. [2025-02-06 13:06:07,432 INFO L125 PetriNetUnfolderBase]: For 2227/2243 co-relation queries the response was YES. [2025-02-06 13:06:07,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2896 conditions, 730 events. 416/730 cut-off events. For 2227/2243 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2982 event pairs, 120 based on Foata normal form. 28/740 useless extension candidates. Maximal degree in co-relation 2241. Up to 383 conditions per place. [2025-02-06 13:06:07,437 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 48 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2025-02-06 13:06:07,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 530 flow [2025-02-06 13:06:07,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-02-06 13:06:07,438 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2025-02-06 13:06:07,438 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 315 flow. Second operand 5 states and 64 transitions. [2025-02-06 13:06:07,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 530 flow [2025-02-06 13:06:07,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 507 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:07,443 INFO L231 Difference]: Finished difference. Result has 69 places, 49 transitions, 324 flow [2025-02-06 13:06:07,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2025-02-06 13:06:07,444 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 35 predicate places. [2025-02-06 13:06:07,445 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 324 flow [2025-02-06 13:06:07,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 13:06:07,446 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:07,446 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] [2025-02-06 13:06:07,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:07,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:07,651 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:07,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:07,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1632674432, now seen corresponding path program 1 times [2025-02-06 13:06:07,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:07,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542229193] [2025-02-06 13:06:07,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:07,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:07,656 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:06:07,668 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:07,668 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:07,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:07,871 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 13:06:07,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:07,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542229193] [2025-02-06 13:06:07,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542229193] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:07,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937995579] [2025-02-06 13:06:07,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:07,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:07,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:07,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:07,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 13:06:07,912 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:06:07,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:07,930 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:07,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:07,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:06:07,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:07,978 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 13:06:07,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:08,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:08,014 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 17 treesize of output 14 [2025-02-06 13:06:08,026 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 13:06:08,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937995579] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:08,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:08,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2025-02-06 13:06:08,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421774910] [2025-02-06 13:06:08,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:08,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:06:08,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:08,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:06:08,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:06:08,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-02-06 13:06:08,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 324 flow. Second operand has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 0 states have call successors, (0), 0 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 13:06:08,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:08,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-02-06 13:06:08,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:08,359 INFO L124 PetriNetUnfolderBase]: 427/853 cut-off events. [2025-02-06 13:06:08,359 INFO L125 PetriNetUnfolderBase]: For 2468/2499 co-relation queries the response was YES. [2025-02-06 13:06:08,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 853 events. 427/853 cut-off events. For 2468/2499 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4175 event pairs, 50 based on Foata normal form. 4/857 useless extension candidates. Maximal degree in co-relation 2483. Up to 468 conditions per place. [2025-02-06 13:06:08,365 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 66 selfloop transitions, 31 changer transitions 16/122 dead transitions. [2025-02-06 13:06:08,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 984 flow [2025-02-06 13:06:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:06:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:06:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2025-02-06 13:06:08,367 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45179063360881544 [2025-02-06 13:06:08,367 INFO L175 Difference]: Start difference. First operand has 69 places, 49 transitions, 324 flow. Second operand 11 states and 164 transitions. [2025-02-06 13:06:08,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 984 flow [2025-02-06 13:06:08,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 122 transitions, 954 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:08,373 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 640 flow [2025-02-06 13:06:08,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=640, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2025-02-06 13:06:08,373 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2025-02-06 13:06:08,373 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 640 flow [2025-02-06 13:06:08,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 0 states have call successors, (0), 0 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 13:06:08,374 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:08,374 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] [2025-02-06 13:06:08,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:08,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 13:06:08,575 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:08,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1527661748, now seen corresponding path program 2 times [2025-02-06 13:06:08,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:08,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883233096] [2025-02-06 13:06:08,575 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:08,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:08,581 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:08,589 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:08,589 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:08,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:08,712 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 13:06:08,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:08,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883233096] [2025-02-06 13:06:08,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883233096] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:08,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683958304] [2025-02-06 13:06:08,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:08,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:08,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:08,715 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:08,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 13:06:08,760 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:08,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:08,775 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:08,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:08,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:06:08,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:08,884 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 13:06:08,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:08,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:08,909 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 21 treesize of output 14 [2025-02-06 13:06:08,936 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 13:06:08,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683958304] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:08,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:08,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 13 [2025-02-06 13:06:08,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310644518] [2025-02-06 13:06:08,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:08,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:06:08,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:08,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:06:08,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:06:08,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-02-06 13:06:08,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 640 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 13:06:08,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:08,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-02-06 13:06:08,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:09,208 INFO L124 PetriNetUnfolderBase]: 432/869 cut-off events. [2025-02-06 13:06:09,208 INFO L125 PetriNetUnfolderBase]: For 3370/3401 co-relation queries the response was YES. [2025-02-06 13:06:09,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3875 conditions, 869 events. 432/869 cut-off events. For 3370/3401 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4409 event pairs, 104 based on Foata normal form. 6/873 useless extension candidates. Maximal degree in co-relation 3450. Up to 606 conditions per place. [2025-02-06 13:06:09,214 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 67 selfloop transitions, 25 changer transitions 11/112 dead transitions. [2025-02-06 13:06:09,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 1116 flow [2025-02-06 13:06:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:06:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:06:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2025-02-06 13:06:09,215 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2025-02-06 13:06:09,215 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 640 flow. Second operand 8 states and 116 transitions. [2025-02-06 13:06:09,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 1116 flow [2025-02-06 13:06:09,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 112 transitions, 1093 flow, removed 10 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:09,222 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 824 flow [2025-02-06 13:06:09,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=824, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2025-02-06 13:06:09,223 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 60 predicate places. [2025-02-06 13:06:09,223 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 824 flow [2025-02-06 13:06:09,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 13:06:09,223 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:09,223 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] [2025-02-06 13:06:09,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 13:06:09,423 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,SelfDestructingSolverStorable16 [2025-02-06 13:06:09,423 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:09,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1850779638, now seen corresponding path program 3 times [2025-02-06 13:06:09,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:09,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350945566] [2025-02-06 13:06:09,424 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:09,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:09,431 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-02-06 13:06:09,444 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 22 statements. [2025-02-06 13:06:09,444 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:09,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:09,628 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 13:06:09,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:09,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350945566] [2025-02-06 13:06:09,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350945566] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:09,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103941061] [2025-02-06 13:06:09,628 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:09,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:09,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:09,632 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:09,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 13:06:09,672 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-02-06 13:06:09,688 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 22 statements. [2025-02-06 13:06:09,688 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:09,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:09,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:06:09,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:09,769 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 13:06:09,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:09,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:09,796 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 21 treesize of output 14 [2025-02-06 13:06:09,836 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 13:06:09,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103941061] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:09,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:09,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 13 [2025-02-06 13:06:09,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576230202] [2025-02-06 13:06:09,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:09,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:06:09,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:09,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:06:09,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:06:09,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-02-06 13:06:09,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 824 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 13:06:09,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:09,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-02-06 13:06:09,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:10,077 INFO L124 PetriNetUnfolderBase]: 464/933 cut-off events. [2025-02-06 13:06:10,078 INFO L125 PetriNetUnfolderBase]: For 4670/4708 co-relation queries the response was YES. [2025-02-06 13:06:10,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4447 conditions, 933 events. 464/933 cut-off events. For 4670/4708 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4876 event pairs, 111 based on Foata normal form. 6/939 useless extension candidates. Maximal degree in co-relation 4012. Up to 664 conditions per place. [2025-02-06 13:06:10,083 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 78 selfloop transitions, 23 changer transitions 12/122 dead transitions. [2025-02-06 13:06:10,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 122 transitions, 1319 flow [2025-02-06 13:06:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:06:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:06:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2025-02-06 13:06:10,086 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2025-02-06 13:06:10,086 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 824 flow. Second operand 9 states and 125 transitions. [2025-02-06 13:06:10,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 122 transitions, 1319 flow [2025-02-06 13:06:10,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 122 transitions, 1296 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:10,096 INFO L231 Difference]: Finished difference. Result has 104 places, 94 transitions, 961 flow [2025-02-06 13:06:10,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=961, PETRI_PLACES=104, PETRI_TRANSITIONS=94} [2025-02-06 13:06:10,096 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 70 predicate places. [2025-02-06 13:06:10,096 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 94 transitions, 961 flow [2025-02-06 13:06:10,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 13:06:10,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:10,097 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] [2025-02-06 13:06:10,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 13:06:10,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 13:06:10,297 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:10,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:10,298 INFO L85 PathProgramCache]: Analyzing trace with hash 578739278, now seen corresponding path program 4 times [2025-02-06 13:06:10,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:10,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539157301] [2025-02-06 13:06:10,298 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:10,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:10,302 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:10,306 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:10,307 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:10,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:10,585 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 13:06:10,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:10,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539157301] [2025-02-06 13:06:10,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539157301] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:10,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740023880] [2025-02-06 13:06:10,585 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:10,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:10,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:10,588 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:10,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 13:06:10,622 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:10,637 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:10,637 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:10,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:10,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:06:10,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:10,692 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 13:06:10,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:10,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:10,716 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 21 treesize of output 14 [2025-02-06 13:06:10,743 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 13:06:10,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740023880] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:10,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:10,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2025-02-06 13:06:10,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852165855] [2025-02-06 13:06:10,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:10,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:06:10,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:10,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:06:10,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:06:10,798 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-02-06 13:06:10,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 94 transitions, 961 flow. Second operand has 15 states, 15 states have (on average 10.4) internal successors, (156), 15 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 13:06:10,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:10,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-02-06 13:06:10,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:11,076 INFO L124 PetriNetUnfolderBase]: 492/981 cut-off events. [2025-02-06 13:06:11,076 INFO L125 PetriNetUnfolderBase]: For 6576/6617 co-relation queries the response was YES. [2025-02-06 13:06:11,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5012 conditions, 981 events. 492/981 cut-off events. For 6576/6617 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5247 event pairs, 120 based on Foata normal form. 2/981 useless extension candidates. Maximal degree in co-relation 4550. Up to 716 conditions per place. [2025-02-06 13:06:11,086 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 84 selfloop transitions, 24 changer transitions 11/128 dead transitions. [2025-02-06 13:06:11,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 128 transitions, 1514 flow [2025-02-06 13:06:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:06:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:06:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2025-02-06 13:06:11,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2025-02-06 13:06:11,087 INFO L175 Difference]: Start difference. First operand has 104 places, 94 transitions, 961 flow. Second operand 9 states and 125 transitions. [2025-02-06 13:06:11,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 128 transitions, 1514 flow [2025-02-06 13:06:11,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 128 transitions, 1469 flow, removed 19 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:11,102 INFO L231 Difference]: Finished difference. Result has 114 places, 103 transitions, 1125 flow [2025-02-06 13:06:11,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1125, PETRI_PLACES=114, PETRI_TRANSITIONS=103} [2025-02-06 13:06:11,102 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 80 predicate places. [2025-02-06 13:06:11,102 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 103 transitions, 1125 flow [2025-02-06 13:06:11,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.4) internal successors, (156), 15 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 13:06:11,103 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:11,103 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] [2025-02-06 13:06:11,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 13:06:11,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:11,303 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:11,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:11,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1641129982, now seen corresponding path program 5 times [2025-02-06 13:06:11,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:11,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707054667] [2025-02-06 13:06:11,304 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:11,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:11,321 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-02-06 13:06:11,329 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:11,329 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:06:11,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:11,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707054667] [2025-02-06 13:06:11,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707054667] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496539883] [2025-02-06 13:06:11,546 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:11,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:11,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:11,548 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:11,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 13:06:11,584 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-02-06 13:06:11,599 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:11,599 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:06:11,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:11,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:06:11,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:11,664 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 13:06:11,664 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:11,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496539883] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:11,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:06:11,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 12 [2025-02-06 13:06:11,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776645934] [2025-02-06 13:06:11,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:11,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:06:11,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:11,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:06:11,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:06:11,674 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-02-06 13:06:11,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 103 transitions, 1125 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 13:06:11,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:11,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-02-06 13:06:11,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:11,848 INFO L124 PetriNetUnfolderBase]: 475/953 cut-off events. [2025-02-06 13:06:11,849 INFO L125 PetriNetUnfolderBase]: For 7036/7083 co-relation queries the response was YES. [2025-02-06 13:06:11,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5057 conditions, 953 events. 475/953 cut-off events. For 7036/7083 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5028 event pairs, 94 based on Foata normal form. 2/955 useless extension candidates. Maximal degree in co-relation 4551. Up to 641 conditions per place. [2025-02-06 13:06:11,856 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 86 selfloop transitions, 22 changer transitions 14/129 dead transitions. [2025-02-06 13:06:11,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 129 transitions, 1610 flow [2025-02-06 13:06:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:06:11,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:06:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2025-02-06 13:06:11,858 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2025-02-06 13:06:11,858 INFO L175 Difference]: Start difference. First operand has 114 places, 103 transitions, 1125 flow. Second operand 7 states and 104 transitions. [2025-02-06 13:06:11,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 129 transitions, 1610 flow [2025-02-06 13:06:11,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 129 transitions, 1538 flow, removed 24 selfloop flow, removed 5 redundant places. [2025-02-06 13:06:11,871 INFO L231 Difference]: Finished difference. Result has 118 places, 100 transitions, 1097 flow [2025-02-06 13:06:11,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1097, PETRI_PLACES=118, PETRI_TRANSITIONS=100} [2025-02-06 13:06:11,872 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 84 predicate places. [2025-02-06 13:06:11,872 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 100 transitions, 1097 flow [2025-02-06 13:06:11,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 13:06:11,872 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:11,872 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:11,879 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 13:06:12,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:12,073 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:12,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:12,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2076073573, now seen corresponding path program 6 times [2025-02-06 13:06:12,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:12,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062076935] [2025-02-06 13:06:12,073 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:06:12,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:12,078 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 4 equivalence classes. [2025-02-06 13:06:12,083 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 22 of 27 statements. [2025-02-06 13:06:12,083 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:06:12,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:06:12,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:12,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062076935] [2025-02-06 13:06:12,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062076935] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:12,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64905397] [2025-02-06 13:06:12,223 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:06:12,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:12,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:12,225 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:12,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 13:06:12,266 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 4 equivalence classes. [2025-02-06 13:06:12,288 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 22 of 27 statements. [2025-02-06 13:06:12,289 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:06:12,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:12,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:06:12,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:12,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:06:12,364 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 18 treesize of output 12 [2025-02-06 13:06:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:06:12,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:06:12,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64905397] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:12,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:12,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2025-02-06 13:06:12,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423663824] [2025-02-06 13:06:12,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:12,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 13:06:12,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:12,494 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 13:06:12,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:06:12,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-06 13:06:12,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 100 transitions, 1097 flow. Second operand has 16 states, 16 states have (on average 9.0625) internal successors, (145), 16 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 13:06:12,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:12,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-06 13:06:12,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:12,853 INFO L124 PetriNetUnfolderBase]: 514/907 cut-off events. [2025-02-06 13:06:12,853 INFO L125 PetriNetUnfolderBase]: For 6942/6980 co-relation queries the response was YES. [2025-02-06 13:06:12,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5038 conditions, 907 events. 514/907 cut-off events. For 6942/6980 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4226 event pairs, 75 based on Foata normal form. 57/963 useless extension candidates. Maximal degree in co-relation 4974. Up to 362 conditions per place. [2025-02-06 13:06:12,863 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 109 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2025-02-06 13:06:12,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 134 transitions, 1699 flow [2025-02-06 13:06:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:06:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:06:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2025-02-06 13:06:12,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3468013468013468 [2025-02-06 13:06:12,864 INFO L175 Difference]: Start difference. First operand has 118 places, 100 transitions, 1097 flow. Second operand 9 states and 103 transitions. [2025-02-06 13:06:12,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 134 transitions, 1699 flow [2025-02-06 13:06:12,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 134 transitions, 1589 flow, removed 27 selfloop flow, removed 11 redundant places. [2025-02-06 13:06:12,880 INFO L231 Difference]: Finished difference. Result has 107 places, 99 transitions, 1047 flow [2025-02-06 13:06:12,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1047, PETRI_PLACES=107, PETRI_TRANSITIONS=99} [2025-02-06 13:06:12,881 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 73 predicate places. [2025-02-06 13:06:12,881 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 99 transitions, 1047 flow [2025-02-06 13:06:12,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 16 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 13:06:12,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:12,881 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:12,887 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 13:06:13,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:13,085 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:13,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1900155438, now seen corresponding path program 7 times [2025-02-06 13:06:13,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:13,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531262917] [2025-02-06 13:06:13,086 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:06:13,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:13,090 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 13:06:13,095 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:06:13,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:13,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:06:13,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:13,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531262917] [2025-02-06 13:06:13,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531262917] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:13,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872907837] [2025-02-06 13:06:13,169 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:06:13,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:13,171 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:13,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 13:06:13,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 13:06:13,237 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 13:06:13,237 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:13,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:13,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:06:13,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:06:13,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:06:13,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872907837] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:13,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:06:13,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-02-06 13:06:13,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626530937] [2025-02-06 13:06:13,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:13,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:06:13,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:13,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:06:13,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:06:13,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:06:13,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 99 transitions, 1047 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:13,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:13,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:06:13,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:13,477 INFO L124 PetriNetUnfolderBase]: 419/780 cut-off events. [2025-02-06 13:06:13,478 INFO L125 PetriNetUnfolderBase]: For 6197/6201 co-relation queries the response was YES. [2025-02-06 13:06:13,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4279 conditions, 780 events. 419/780 cut-off events. For 6197/6201 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3515 event pairs, 86 based on Foata normal form. 44/823 useless extension candidates. Maximal degree in co-relation 4220. Up to 348 conditions per place. [2025-02-06 13:06:13,487 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 95 selfloop transitions, 20 changer transitions 0/119 dead transitions. [2025-02-06 13:06:13,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 119 transitions, 1470 flow [2025-02-06 13:06:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:06:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:06:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2025-02-06 13:06:13,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2025-02-06 13:06:13,489 INFO L175 Difference]: Start difference. First operand has 107 places, 99 transitions, 1047 flow. Second operand 7 states and 91 transitions. [2025-02-06 13:06:13,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 119 transitions, 1470 flow [2025-02-06 13:06:13,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 119 transitions, 1386 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-02-06 13:06:13,498 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 1012 flow [2025-02-06 13:06:13,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1012, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2025-02-06 13:06:13,499 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 70 predicate places. [2025-02-06 13:06:13,499 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 1012 flow [2025-02-06 13:06:13,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:13,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:13,500 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:13,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:13,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:13,700 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:13,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:13,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1689028970, now seen corresponding path program 8 times [2025-02-06 13:06:13,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:13,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362403492] [2025-02-06 13:06:13,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:13,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:13,708 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:06:13,721 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:13,721 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:13,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:14,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:14,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362403492] [2025-02-06 13:06:14,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362403492] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:14,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237127682] [2025-02-06 13:06:14,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:14,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:14,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:14,095 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:06:14,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 13:06:14,138 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:06:14,157 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:14,157 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:14,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:14,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-06 13:06:14,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:14,205 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 13:06:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:14,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:06:14,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237127682] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:14,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:14,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 9] total 35 [2025-02-06 13:06:14,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202983473] [2025-02-06 13:06:14,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:14,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-06 13:06:14,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:14,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-06 13:06:14,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2025-02-06 13:06:14,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-06 13:06:14,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 98 transitions, 1012 flow. Second operand has 36 states, 36 states have (on average 8.11111111111111) internal successors, (292), 36 states have internal predecessors, (292), 0 states have call successors, (0), 0 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 13:06:14,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:14,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-06 13:06:14,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:16,597 INFO L124 PetriNetUnfolderBase]: 1087/1846 cut-off events. [2025-02-06 13:06:16,597 INFO L125 PetriNetUnfolderBase]: For 12501/12501 co-relation queries the response was YES. [2025-02-06 13:06:16,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9717 conditions, 1846 events. 1087/1846 cut-off events. For 12501/12501 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8994 event pairs, 20 based on Foata normal form. 1/1847 useless extension candidates. Maximal degree in co-relation 9659. Up to 772 conditions per place. [2025-02-06 13:06:16,612 INFO L140 encePairwiseOnDemand]: 17/33 looper letters, 163 selfloop transitions, 199 changer transitions 1/364 dead transitions. [2025-02-06 13:06:16,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 364 transitions, 3782 flow [2025-02-06 13:06:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-06 13:06:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-02-06 13:06:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 549 transitions. [2025-02-06 13:06:16,618 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2025-02-06 13:06:16,618 INFO L175 Difference]: Start difference. First operand has 104 places, 98 transitions, 1012 flow. Second operand 48 states and 549 transitions. [2025-02-06 13:06:16,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 364 transitions, 3782 flow [2025-02-06 13:06:16,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 364 transitions, 3674 flow, removed 1 selfloop flow, removed 6 redundant places. [2025-02-06 13:06:16,640 INFO L231 Difference]: Finished difference. Result has 159 places, 259 transitions, 3323 flow [2025-02-06 13:06:16,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=3323, PETRI_PLACES=159, PETRI_TRANSITIONS=259} [2025-02-06 13:06:16,642 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 125 predicate places. [2025-02-06 13:06:16,642 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 259 transitions, 3323 flow [2025-02-06 13:06:16,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.11111111111111) internal successors, (292), 36 states have internal predecessors, (292), 0 states have call successors, (0), 0 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 13:06:16,643 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:16,643 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:16,650 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 13:06:16,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:16,843 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:16,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1956462338, now seen corresponding path program 9 times [2025-02-06 13:06:16,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:16,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426235210] [2025-02-06 13:06:16,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:16,848 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:06:16,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 30 statements. [2025-02-06 13:06:16,854 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:16,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:06:17,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:17,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426235210] [2025-02-06 13:06:17,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426235210] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:17,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774416028] [2025-02-06 13:06:17,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:17,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:17,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:17,121 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 13:06:17,123 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 13:06:17,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:06:17,180 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 30 statements. [2025-02-06 13:06:17,180 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:17,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:17,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-02-06 13:06:17,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:17,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:06:17,232 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 17 treesize of output 13 [2025-02-06 13:06:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:06:17,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:17,829 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2025-02-06 13:06:17,829 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 35 treesize of output 35 [2025-02-06 13:06:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:06:17,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774416028] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:17,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:17,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2025-02-06 13:06:17,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569166305] [2025-02-06 13:06:17,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:17,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-02-06 13:06:17,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:17,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-02-06 13:06:17,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2025-02-06 13:06:18,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-06 13:06:18,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 259 transitions, 3323 flow. Second operand has 42 states, 42 states have (on average 7.785714285714286) internal successors, (327), 42 states have internal predecessors, (327), 0 states have call successors, (0), 0 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 13:06:18,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:18,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-06 13:06:18,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:22,627 INFO L124 PetriNetUnfolderBase]: 1973/3315 cut-off events. [2025-02-06 13:06:22,627 INFO L125 PetriNetUnfolderBase]: For 28718/28718 co-relation queries the response was YES. [2025-02-06 13:06:22,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21297 conditions, 3315 events. 1973/3315 cut-off events. For 28718/28718 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 18009 event pairs, 21 based on Foata normal form. 2/3317 useless extension candidates. Maximal degree in co-relation 21226. Up to 1207 conditions per place. [2025-02-06 13:06:22,655 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 312 selfloop transitions, 543 changer transitions 9/865 dead transitions. [2025-02-06 13:06:22,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 865 transitions, 11630 flow [2025-02-06 13:06:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2025-02-06 13:06:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2025-02-06 13:06:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 1099 transitions. [2025-02-06 13:06:22,657 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32333039129155633 [2025-02-06 13:06:22,658 INFO L175 Difference]: Start difference. First operand has 159 places, 259 transitions, 3323 flow. Second operand 103 states and 1099 transitions. [2025-02-06 13:06:22,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 865 transitions, 11630 flow [2025-02-06 13:06:22,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 865 transitions, 10350 flow, removed 580 selfloop flow, removed 15 redundant places. [2025-02-06 13:06:22,781 INFO L231 Difference]: Finished difference. Result has 266 places, 689 transitions, 9652 flow [2025-02-06 13:06:22,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=9652, PETRI_PLACES=266, PETRI_TRANSITIONS=689} [2025-02-06 13:06:22,782 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 232 predicate places. [2025-02-06 13:06:22,783 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 689 transitions, 9652 flow [2025-02-06 13:06:22,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.785714285714286) internal successors, (327), 42 states have internal predecessors, (327), 0 states have call successors, (0), 0 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 13:06:22,783 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:22,783 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:22,790 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 13:06:22,987 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,SelfDestructingSolverStorable23 [2025-02-06 13:06:22,987 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:22,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:22,987 INFO L85 PathProgramCache]: Analyzing trace with hash -801616714, now seen corresponding path program 10 times [2025-02-06 13:06:22,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:22,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917822864] [2025-02-06 13:06:22,988 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:22,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:22,992 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:06:23,002 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:23,002 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:23,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:23,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:23,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917822864] [2025-02-06 13:06:23,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917822864] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:23,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086360038] [2025-02-06 13:06:23,506 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:23,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:23,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:23,508 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 13:06:23,509 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 13:06:23,555 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:06:23,575 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:23,576 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:23,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:23,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 13:06:23,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:06:23,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:23,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:23,897 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 35 treesize of output 43 [2025-02-06 13:06:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:06:23,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086360038] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:23,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:23,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 32 [2025-02-06 13:06:23,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013380801] [2025-02-06 13:06:23,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:23,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-06 13:06:23,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:23,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-06 13:06:23,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2025-02-06 13:06:23,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-06 13:06:23,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 689 transitions, 9652 flow. Second operand has 33 states, 33 states have (on average 8.212121212121213) internal successors, (271), 33 states have internal predecessors, (271), 0 states have call successors, (0), 0 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 13:06:23,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:23,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-06 13:06:23,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:25,860 INFO L124 PetriNetUnfolderBase]: 2884/4808 cut-off events. [2025-02-06 13:06:25,860 INFO L125 PetriNetUnfolderBase]: For 44199/44199 co-relation queries the response was YES. [2025-02-06 13:06:25,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34290 conditions, 4808 events. 2884/4808 cut-off events. For 44199/44199 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 27958 event pairs, 40 based on Foata normal form. 2/4810 useless extension candidates. Maximal degree in co-relation 34206. Up to 1865 conditions per place. [2025-02-06 13:06:25,915 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 533 selfloop transitions, 621 changer transitions 5/1160 dead transitions. [2025-02-06 13:06:25,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 1160 transitions, 18313 flow [2025-02-06 13:06:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-02-06 13:06:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-02-06 13:06:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 513 transitions. [2025-02-06 13:06:25,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35330578512396693 [2025-02-06 13:06:25,917 INFO L175 Difference]: Start difference. First operand has 266 places, 689 transitions, 9652 flow. Second operand 44 states and 513 transitions. [2025-02-06 13:06:25,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 1160 transitions, 18313 flow [2025-02-06 13:06:26,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 1160 transitions, 16500 flow, removed 848 selfloop flow, removed 13 redundant places. [2025-02-06 13:06:26,293 INFO L231 Difference]: Finished difference. Result has 313 places, 974 transitions, 14790 flow [2025-02-06 13:06:26,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8395, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14790, PETRI_PLACES=313, PETRI_TRANSITIONS=974} [2025-02-06 13:06:26,294 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 279 predicate places. [2025-02-06 13:06:26,294 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 974 transitions, 14790 flow [2025-02-06 13:06:26,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.212121212121213) internal successors, (271), 33 states have internal predecessors, (271), 0 states have call successors, (0), 0 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 13:06:26,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:26,294 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:26,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:26,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:26,494 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:26,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:26,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1625781078, now seen corresponding path program 11 times [2025-02-06 13:06:26,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:26,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058341471] [2025-02-06 13:06:26,495 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:26,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:26,499 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:06:26,507 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:26,508 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:06:26,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:26,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:26,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058341471] [2025-02-06 13:06:26,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058341471] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:26,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191980674] [2025-02-06 13:06:26,866 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:26,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:26,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:26,869 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 13:06:26,870 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 13:06:26,908 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:06:26,926 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:26,926 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:06:26,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:26,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-06 13:06:26,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:06:27,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:27,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:27,269 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 35 treesize of output 43 [2025-02-06 13:06:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:06:27,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191980674] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:27,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:27,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 27 [2025-02-06 13:06:27,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462197062] [2025-02-06 13:06:27,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:27,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 13:06:27,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:27,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 13:06:27,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2025-02-06 13:06:27,516 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-02-06 13:06:27,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 974 transitions, 14790 flow. Second operand has 28 states, 28 states have (on average 10.071428571428571) internal successors, (282), 28 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:27,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:27,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-02-06 13:06:27,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:29,050 INFO L124 PetriNetUnfolderBase]: 2645/4675 cut-off events. [2025-02-06 13:06:29,051 INFO L125 PetriNetUnfolderBase]: For 58435/58564 co-relation queries the response was YES. [2025-02-06 13:06:29,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36769 conditions, 4675 events. 2645/4675 cut-off events. For 58435/58564 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 29613 event pairs, 89 based on Foata normal form. 53/4697 useless extension candidates. Maximal degree in co-relation 36667. Up to 3357 conditions per place. [2025-02-06 13:06:29,124 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 699 selfloop transitions, 113 changer transitions 1/1059 dead transitions. [2025-02-06 13:06:29,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1059 transitions, 17525 flow [2025-02-06 13:06:29,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 13:06:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 13:06:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 201 transitions. [2025-02-06 13:06:29,127 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40606060606060607 [2025-02-06 13:06:29,127 INFO L175 Difference]: Start difference. First operand has 313 places, 974 transitions, 14790 flow. Second operand 15 states and 201 transitions. [2025-02-06 13:06:29,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1059 transitions, 17525 flow [2025-02-06 13:06:29,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1059 transitions, 16807 flow, removed 295 selfloop flow, removed 18 redundant places. [2025-02-06 13:06:29,828 INFO L231 Difference]: Finished difference. Result has 312 places, 1019 transitions, 15245 flow [2025-02-06 13:06:29,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=14125, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=869, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15245, PETRI_PLACES=312, PETRI_TRANSITIONS=1019} [2025-02-06 13:06:29,830 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 278 predicate places. [2025-02-06 13:06:29,830 INFO L471 AbstractCegarLoop]: Abstraction has has 312 places, 1019 transitions, 15245 flow [2025-02-06 13:06:29,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.071428571428571) internal successors, (282), 28 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:29,830 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:29,830 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:29,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:30,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-06 13:06:30,031 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:30,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:30,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1151577998, now seen corresponding path program 12 times [2025-02-06 13:06:30,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:30,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031724650] [2025-02-06 13:06:30,031 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:06:30,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:30,037 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:06:30,049 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 30 statements. [2025-02-06 13:06:30,049 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:06:30,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:30,280 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 13:06:30,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:30,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031724650] [2025-02-06 13:06:30,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031724650] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:30,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446180846] [2025-02-06 13:06:30,280 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:06:30,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:30,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:30,282 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 13:06:30,284 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 13:06:30,334 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:06:30,362 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 30 statements. [2025-02-06 13:06:30,362 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:06:30,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:30,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 13:06:30,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:30,487 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 13:06:30,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:30,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:30,585 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 35 treesize of output 43 [2025-02-06 13:06:30,622 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 13:06:30,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446180846] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:30,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:30,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-02-06 13:06:30,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095320022] [2025-02-06 13:06:30,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:30,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 13:06:30,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:30,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 13:06:30,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2025-02-06 13:06:30,695 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-02-06 13:06:30,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1019 transitions, 15245 flow. Second operand has 20 states, 20 states have (on average 10.0) internal successors, (200), 20 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 13:06:30,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:30,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-02-06 13:06:30,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:32,161 INFO L124 PetriNetUnfolderBase]: 2962/5208 cut-off events. [2025-02-06 13:06:32,161 INFO L125 PetriNetUnfolderBase]: For 64093/64222 co-relation queries the response was YES. [2025-02-06 13:06:32,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41047 conditions, 5208 events. 2962/5208 cut-off events. For 64093/64222 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 33299 event pairs, 95 based on Foata normal form. 62/5246 useless extension candidates. Maximal degree in co-relation 40941. Up to 3617 conditions per place. [2025-02-06 13:06:32,215 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 744 selfloop transitions, 173 changer transitions 2/1165 dead transitions. [2025-02-06 13:06:32,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1165 transitions, 19333 flow [2025-02-06 13:06:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 13:06:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 13:06:32,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 243 transitions. [2025-02-06 13:06:32,216 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-02-06 13:06:32,216 INFO L175 Difference]: Start difference. First operand has 312 places, 1019 transitions, 15245 flow. Second operand 18 states and 243 transitions. [2025-02-06 13:06:32,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1165 transitions, 19333 flow [2025-02-06 13:06:32,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 1165 transitions, 19287 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-02-06 13:06:32,801 INFO L231 Difference]: Finished difference. Result has 332 places, 1131 transitions, 17953 flow [2025-02-06 13:06:32,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=15199, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=884, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=17953, PETRI_PLACES=332, PETRI_TRANSITIONS=1131} [2025-02-06 13:06:32,802 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 298 predicate places. [2025-02-06 13:06:32,802 INFO L471 AbstractCegarLoop]: Abstraction has has 332 places, 1131 transitions, 17953 flow [2025-02-06 13:06:32,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.0) internal successors, (200), 20 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 13:06:32,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:32,802 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:32,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:33,004 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,SelfDestructingSolverStorable26 [2025-02-06 13:06:33,004 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:33,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash 2013499456, now seen corresponding path program 13 times [2025-02-06 13:06:33,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:33,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510377359] [2025-02-06 13:06:33,005 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:06:33,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:33,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:06:33,020 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:33,020 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:33,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:33,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:33,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510377359] [2025-02-06 13:06:33,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510377359] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:33,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390150781] [2025-02-06 13:06:33,583 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:06:33,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:33,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:33,585 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 13:06:33,586 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 13:06:33,624 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:06:33,642 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:33,642 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:33,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:33,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 13:06:33,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:06:33,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:33,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:33,898 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 35 treesize of output 43 [2025-02-06 13:06:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:06:33,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390150781] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:33,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:33,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2025-02-06 13:06:33,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482763246] [2025-02-06 13:06:33,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:33,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-06 13:06:33,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:33,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-06 13:06:33,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2025-02-06 13:06:34,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-06 13:06:34,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1131 transitions, 17953 flow. Second operand has 30 states, 30 states have (on average 8.933333333333334) internal successors, (268), 30 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:34,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:34,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-06 13:06:34,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:36,224 INFO L124 PetriNetUnfolderBase]: 3393/5791 cut-off events. [2025-02-06 13:06:36,224 INFO L125 PetriNetUnfolderBase]: For 76444/76577 co-relation queries the response was YES. [2025-02-06 13:06:36,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47314 conditions, 5791 events. 3393/5791 cut-off events. For 76444/76577 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36068 event pairs, 92 based on Foata normal form. 74/5846 useless extension candidates. Maximal degree in co-relation 47201. Up to 4585 conditions per place. [2025-02-06 13:06:36,416 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 939 selfloop transitions, 163 changer transitions 1/1255 dead transitions. [2025-02-06 13:06:36,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1255 transitions, 22120 flow [2025-02-06 13:06:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 13:06:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-02-06 13:06:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 292 transitions. [2025-02-06 13:06:36,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2025-02-06 13:06:36,417 INFO L175 Difference]: Start difference. First operand has 332 places, 1131 transitions, 17953 flow. Second operand 24 states and 292 transitions. [2025-02-06 13:06:36,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1255 transitions, 22120 flow [2025-02-06 13:06:37,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1255 transitions, 21621 flow, removed 213 selfloop flow, removed 6 redundant places. [2025-02-06 13:06:37,195 INFO L231 Difference]: Finished difference. Result has 359 places, 1197 transitions, 19414 flow [2025-02-06 13:06:37,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=17454, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=19414, PETRI_PLACES=359, PETRI_TRANSITIONS=1197} [2025-02-06 13:06:37,196 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 325 predicate places. [2025-02-06 13:06:37,196 INFO L471 AbstractCegarLoop]: Abstraction has has 359 places, 1197 transitions, 19414 flow [2025-02-06 13:06:37,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.933333333333334) internal successors, (268), 30 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:37,196 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:37,196 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:37,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-06 13:06:37,397 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,SelfDestructingSolverStorable27 [2025-02-06 13:06:37,397 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:37,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1499836450, now seen corresponding path program 14 times [2025-02-06 13:06:37,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:37,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384890835] [2025-02-06 13:06:37,398 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:37,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:37,402 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:06:37,408 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:37,410 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:37,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:37,699 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 13:06:37,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:37,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384890835] [2025-02-06 13:06:37,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384890835] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:37,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:37,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-02-06 13:06:37,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919302034] [2025-02-06 13:06:37,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:37,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:06:37,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:37,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:06:37,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:06:37,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-06 13:06:37,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1197 transitions, 19414 flow. Second operand has 15 states, 15 states have (on average 7.8) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 13:06:37,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:37,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-06 13:06:37,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:39,539 INFO L124 PetriNetUnfolderBase]: 3752/6235 cut-off events. [2025-02-06 13:06:39,539 INFO L125 PetriNetUnfolderBase]: For 80174/80174 co-relation queries the response was YES. [2025-02-06 13:06:39,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51034 conditions, 6235 events. 3752/6235 cut-off events. For 80174/80174 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37872 event pairs, 106 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 50906. Up to 4646 conditions per place. [2025-02-06 13:06:39,625 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 774 selfloop transitions, 511 changer transitions 3/1289 dead transitions. [2025-02-06 13:06:39,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1289 transitions, 23265 flow [2025-02-06 13:06:39,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 13:06:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 13:06:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 210 transitions. [2025-02-06 13:06:39,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35353535353535354 [2025-02-06 13:06:39,626 INFO L175 Difference]: Start difference. First operand has 359 places, 1197 transitions, 19414 flow. Second operand 18 states and 210 transitions. [2025-02-06 13:06:39,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1289 transitions, 23265 flow [2025-02-06 13:06:40,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1289 transitions, 22836 flow, removed 181 selfloop flow, removed 10 redundant places. [2025-02-06 13:06:40,625 INFO L231 Difference]: Finished difference. Result has 371 places, 1236 transitions, 21741 flow [2025-02-06 13:06:40,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=18985, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21741, PETRI_PLACES=371, PETRI_TRANSITIONS=1236} [2025-02-06 13:06:40,626 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 337 predicate places. [2025-02-06 13:06:40,626 INFO L471 AbstractCegarLoop]: Abstraction has has 371 places, 1236 transitions, 21741 flow [2025-02-06 13:06:40,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.8) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 13:06:40,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:40,626 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:40,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-02-06 13:06:40,626 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:40,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash -258886632, now seen corresponding path program 15 times [2025-02-06 13:06:40,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:40,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860231466] [2025-02-06 13:06:40,627 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:40,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:40,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:06:40,636 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 30 statements. [2025-02-06 13:06:40,636 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:40,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:06:40,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860231466] [2025-02-06 13:06:40,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860231466] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453786685] [2025-02-06 13:06:40,841 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:40,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:40,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:40,843 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 13:06:40,844 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 13:06:40,886 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:06:40,904 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 30 statements. [2025-02-06 13:06:40,904 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:40,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:40,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-02-06 13:06:40,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:40,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:06:40,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-02-06 13:06:40,968 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 19 treesize of output 15 [2025-02-06 13:06:41,374 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 13:06:41,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:41,376 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 24 treesize of output 9 [2025-02-06 13:06:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:06:41,384 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:42,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2025-02-06 13:06:42,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:06:42,055 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 46 [2025-02-06 13:06:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:06:42,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453786685] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:42,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:42,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2025-02-06 13:06:42,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710098690] [2025-02-06 13:06:42,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:42,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-06 13:06:42,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:42,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-06 13:06:42,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1342, Unknown=0, NotChecked=0, Total=1560 [2025-02-06 13:06:42,244 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-06 13:06:42,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1236 transitions, 21741 flow. Second operand has 40 states, 40 states have (on average 7.9) internal successors, (316), 40 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 13:06:42,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:42,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-06 13:06:42,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:47,951 INFO L124 PetriNetUnfolderBase]: 4465/7397 cut-off events. [2025-02-06 13:06:47,951 INFO L125 PetriNetUnfolderBase]: For 114219/114219 co-relation queries the response was YES. [2025-02-06 13:06:48,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65732 conditions, 7397 events. 4465/7397 cut-off events. For 114219/114219 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 46319 event pairs, 89 based on Foata normal form. 2/7399 useless extension candidates. Maximal degree in co-relation 65601. Up to 4128 conditions per place. [2025-02-06 13:06:48,035 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 583 selfloop transitions, 1114 changer transitions 9/1707 dead transitions. [2025-02-06 13:06:48,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1707 transitions, 33051 flow [2025-02-06 13:06:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2025-02-06 13:06:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2025-02-06 13:06:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 832 transitions. [2025-02-06 13:06:48,037 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32323232323232326 [2025-02-06 13:06:48,037 INFO L175 Difference]: Start difference. First operand has 371 places, 1236 transitions, 21741 flow. Second operand 78 states and 832 transitions. [2025-02-06 13:06:48,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1707 transitions, 33051 flow [2025-02-06 13:06:49,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1707 transitions, 32887 flow, removed 47 selfloop flow, removed 9 redundant places. [2025-02-06 13:06:49,302 INFO L231 Difference]: Finished difference. Result has 463 places, 1567 transitions, 32904 flow [2025-02-06 13:06:49,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=21590, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=818, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=32904, PETRI_PLACES=463, PETRI_TRANSITIONS=1567} [2025-02-06 13:06:49,303 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 429 predicate places. [2025-02-06 13:06:49,303 INFO L471 AbstractCegarLoop]: Abstraction has has 463 places, 1567 transitions, 32904 flow [2025-02-06 13:06:49,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 7.9) internal successors, (316), 40 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 13:06:49,303 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:49,303 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:49,310 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 13:06:49,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:49,504 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:49,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1548004470, now seen corresponding path program 16 times [2025-02-06 13:06:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:49,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593780511] [2025-02-06 13:06:49,505 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:49,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:49,509 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:06:49,514 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:49,514 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:49,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:49,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:49,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593780511] [2025-02-06 13:06:49,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593780511] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:49,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777499349] [2025-02-06 13:06:49,935 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:49,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:49,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:49,937 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 13:06:49,938 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 13:06:49,975 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-06 13:06:49,991 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:49,991 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:06:49,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:49,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 13:06:49,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:06:50,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:50,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:50,246 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 35 treesize of output 43 [2025-02-06 13:06:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:06:50,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777499349] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:50,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:50,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2025-02-06 13:06:50,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952762194] [2025-02-06 13:06:50,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:50,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-06 13:06:50,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:50,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-06 13:06:50,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2025-02-06 13:06:50,327 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-06 13:06:50,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1567 transitions, 32904 flow. Second operand has 29 states, 29 states have (on average 8.379310344827585) internal successors, (243), 29 states have internal predecessors, (243), 0 states have call successors, (0), 0 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 13:06:50,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:50,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-06 13:06:50,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:54,891 INFO L124 PetriNetUnfolderBase]: 6444/10515 cut-off events. [2025-02-06 13:06:54,891 INFO L125 PetriNetUnfolderBase]: For 210593/210593 co-relation queries the response was YES. [2025-02-06 13:06:55,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107975 conditions, 10515 events. 6444/10515 cut-off events. For 210593/210593 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 66120 event pairs, 190 based on Foata normal form. 25/10540 useless extension candidates. Maximal degree in co-relation 107820. Up to 5617 conditions per place. [2025-02-06 13:06:55,210 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 1180 selfloop transitions, 1222 changer transitions 7/2410 dead transitions. [2025-02-06 13:06:55,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 2410 transitions, 56438 flow [2025-02-06 13:06:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2025-02-06 13:06:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2025-02-06 13:06:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 615 transitions. [2025-02-06 13:06:55,212 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3516295025728988 [2025-02-06 13:06:55,212 INFO L175 Difference]: Start difference. First operand has 463 places, 1567 transitions, 32904 flow. Second operand 53 states and 615 transitions. [2025-02-06 13:06:55,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 2410 transitions, 56438 flow [2025-02-06 13:06:58,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 2410 transitions, 54245 flow, removed 1047 selfloop flow, removed 14 redundant places. [2025-02-06 13:06:58,883 INFO L231 Difference]: Finished difference. Result has 522 places, 2219 transitions, 51549 flow [2025-02-06 13:06:58,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=31176, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=51549, PETRI_PLACES=522, PETRI_TRANSITIONS=2219} [2025-02-06 13:06:58,885 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 488 predicate places. [2025-02-06 13:06:58,885 INFO L471 AbstractCegarLoop]: Abstraction has has 522 places, 2219 transitions, 51549 flow [2025-02-06 13:06:58,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.379310344827585) internal successors, (243), 29 states have internal predecessors, (243), 0 states have call successors, (0), 0 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 13:06:58,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:58,885 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:58,892 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 13:06:59,086 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,SelfDestructingSolverStorable30 [2025-02-06 13:06:59,086 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:06:59,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1091037532, now seen corresponding path program 17 times [2025-02-06 13:06:59,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:59,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648032624] [2025-02-06 13:06:59,087 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:59,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:59,092 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:06:59,101 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:59,101 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:06:59,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:59,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648032624] [2025-02-06 13:06:59,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648032624] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103184797] [2025-02-06 13:06:59,490 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:59,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:59,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:59,492 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 13:06:59,493 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 13:06:59,534 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:06:59,554 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:06:59,554 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 13:06:59,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:59,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-06 13:06:59,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:59,604 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 13:06:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:59,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:00,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-02-06 13:07:00,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:07:00,226 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 68 treesize of output 56 [2025-02-06 13:07:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:07:00,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103184797] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:00,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:00,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2025-02-06 13:07:00,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700111121] [2025-02-06 13:07:00,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:00,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-06 13:07:00,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:00,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-06 13:07:00,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2025-02-06 13:07:00,497 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-06 13:07:00,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 2219 transitions, 51549 flow. Second operand has 38 states, 38 states have (on average 7.921052631578948) internal successors, (301), 38 states have internal predecessors, (301), 0 states have call successors, (0), 0 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 13:07:00,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:00,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-06 13:07:00,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:07,927 INFO L124 PetriNetUnfolderBase]: 7413/12061 cut-off events. [2025-02-06 13:07:07,927 INFO L125 PetriNetUnfolderBase]: For 278655/278655 co-relation queries the response was YES. [2025-02-06 13:07:08,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132595 conditions, 12061 events. 7413/12061 cut-off events. For 278655/278655 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 77090 event pairs, 212 based on Foata normal form. 1/12062 useless extension candidates. Maximal degree in co-relation 132179. Up to 10806 conditions per place. [2025-02-06 13:07:08,139 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 2404 selfloop transitions, 336 changer transitions 2/2743 dead transitions. [2025-02-06 13:07:08,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 2743 transitions, 69288 flow [2025-02-06 13:07:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-06 13:07:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-02-06 13:07:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 418 transitions. [2025-02-06 13:07:08,140 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2025-02-06 13:07:08,140 INFO L175 Difference]: Start difference. First operand has 522 places, 2219 transitions, 51549 flow. Second operand 36 states and 418 transitions. [2025-02-06 13:07:08,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 2743 transitions, 69288 flow [2025-02-06 13:07:14,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 2743 transitions, 66483 flow, removed 1322 selfloop flow, removed 15 redundant places. [2025-02-06 13:07:14,631 INFO L231 Difference]: Finished difference. Result has 568 places, 2564 transitions, 59674 flow [2025-02-06 13:07:14,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=48816, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=59674, PETRI_PLACES=568, PETRI_TRANSITIONS=2564} [2025-02-06 13:07:14,633 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 534 predicate places. [2025-02-06 13:07:14,634 INFO L471 AbstractCegarLoop]: Abstraction has has 568 places, 2564 transitions, 59674 flow [2025-02-06 13:07:14,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 7.921052631578948) internal successors, (301), 38 states have internal predecessors, (301), 0 states have call successors, (0), 0 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 13:07:14,634 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:14,634 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:14,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-02-06 13:07:14,834 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,SelfDestructingSolverStorable31 [2025-02-06 13:07:14,834 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-02-06 13:07:14,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1439911880, now seen corresponding path program 18 times [2025-02-06 13:07:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:14,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021133868] [2025-02-06 13:07:14,835 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:07:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:14,842 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:07:14,847 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 30 statements. [2025-02-06 13:07:14,847 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:07:14,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:07:15,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:15,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021133868] [2025-02-06 13:07:15,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021133868] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:15,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829629880] [2025-02-06 13:07:15,043 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:07:15,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:15,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:15,045 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:07:15,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-06 13:07:15,087 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-02-06 13:07:15,104 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 28 of 30 statements. [2025-02-06 13:07:15,104 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:07:15,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:15,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-06 13:07:15,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:15,172 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 13:07:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:07:15,378 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:07:15,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829629880] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:15,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:15,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 31 [2025-02-06 13:07:15,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999483817] [2025-02-06 13:07:15,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:15,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-06 13:07:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:15,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-06 13:07:15,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2025-02-06 13:07:15,624 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-06 13:07:15,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 2564 transitions, 59674 flow. Second operand has 32 states, 32 states have (on average 8.15625) internal successors, (261), 32 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 13:07:15,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:15,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-06 13:07:15,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:22,951 INFO L124 PetriNetUnfolderBase]: 8123/13237 cut-off events. [2025-02-06 13:07:22,952 INFO L125 PetriNetUnfolderBase]: For 293510/293510 co-relation queries the response was YES. [2025-02-06 13:07:23,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143491 conditions, 13237 events. 8123/13237 cut-off events. For 293510/293510 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 86666 event pairs, 230 based on Foata normal form. 2/13239 useless extension candidates. Maximal degree in co-relation 143046. Up to 9143 conditions per place. [2025-02-06 13:07:23,167 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 1806 selfloop transitions, 1169 changer transitions 8/2984 dead transitions. [2025-02-06 13:07:23,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 2984 transitions, 74857 flow [2025-02-06 13:07:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-06 13:07:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-02-06 13:07:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 347 transitions. [2025-02-06 13:07:23,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3505050505050505 [2025-02-06 13:07:23,168 INFO L175 Difference]: Start difference. First operand has 568 places, 2564 transitions, 59674 flow. Second operand 30 states and 347 transitions. [2025-02-06 13:07:23,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 2984 transitions, 74857 flow