./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-counter-fun.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-counter-fun.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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:06:41,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:06:41,532 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:06:41,541 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:06:41,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:06:41,561 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:06:41,561 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:06:41,561 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:06:41,561 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:06:41,561 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:06:41,562 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:06:41,562 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:06:41,562 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:06:41,562 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:06:41,563 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:06:41,563 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:06:41,563 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:06:41,563 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 -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2025-02-06 13:06:41,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:06:41,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:06:41,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:06:41,775 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:06:41,775 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:06:41,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2025-02-06 13:06:42,843 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6771e4834/c432b287e3a640d7ace7ef4f85110e18/FLAG436a20146 [2025-02-06 13:06:43,026 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:06:43,026 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2025-02-06 13:06:43,032 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6771e4834/c432b287e3a640d7ace7ef4f85110e18/FLAG436a20146 [2025-02-06 13:06:43,043 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6771e4834/c432b287e3a640d7ace7ef4f85110e18 [2025-02-06 13:06:43,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:06:43,049 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:06:43,050 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:06:43,050 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:06:43,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:06:43,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e28460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43, skipping insertion in model container [2025-02-06 13:06:43,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,095 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:06:43,212 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 13:06:43,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:06:43,221 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:06:43,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:06:43,249 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:06:43,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43 WrapperNode [2025-02-06 13:06:43,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:06:43,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:06:43,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:06:43,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:06:43,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,280 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 181 [2025-02-06 13:06:43,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:06:43,281 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:06:43,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:06:43,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:06:43,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,288 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,303 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-06 13:06:43,303 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,303 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,309 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,314 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,319 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:06:43,320 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:06:43,320 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:06:43,320 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:06:43,325 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (1/1) ... [2025-02-06 13:06:43,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:06:43,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:43,353 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 13:06:43,356 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 13:06:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:06:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:06:43,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:06:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:06:43,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:06:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:06:43,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:06:43,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:06:43,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:06:43,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:06:43,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:06:43,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:06:43,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:06:43,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:06:43,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:06:43,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:06:43,377 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 13:06:43,460 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:06:43,461 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:06:43,780 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:06:43,781 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:06:44,050 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:06:44,052 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:06:44,053 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:06:44 BoogieIcfgContainer [2025-02-06 13:06:44,053 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:06:44,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:06:44,059 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:06:44,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:06:44,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:06:43" (1/3) ... [2025-02-06 13:06:44,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7110d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:06:44, skipping insertion in model container [2025-02-06 13:06:44,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:06:43" (2/3) ... [2025-02-06 13:06:44,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7110d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:06:44, skipping insertion in model container [2025-02-06 13:06:44,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:06:44" (3/3) ... [2025-02-06 13:06:44,068 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2025-02-06 13:06:44,080 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:06:44,081 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-counter-fun.wvr.c that has 3 procedures, 51 locations, 1 initial locations, 4 loop locations, and 26 error locations. [2025-02-06 13:06:44,081 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:06:44,152 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:06:44,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 54 transitions, 122 flow [2025-02-06 13:06:44,200 INFO L124 PetriNetUnfolderBase]: 4/52 cut-off events. [2025-02-06 13:06:44,202 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:06:44,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 52 events. 4/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 165 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2025-02-06 13:06:44,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 54 transitions, 122 flow [2025-02-06 13:06:44,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 51 transitions, 114 flow [2025-02-06 13:06:44,219 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:06:44,231 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;@74f2b2fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:06:44,234 INFO L334 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2025-02-06 13:06:44,237 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:06:44,239 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:06:44,239 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:06:44,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:44,240 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:06:44,240 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:44,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash 589506, now seen corresponding path program 1 times [2025-02-06 13:06:44,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:44,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649125597] [2025-02-06 13:06:44,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:44,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:44,312 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:06:44,332 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:06:44,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:44,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:44,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:44,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649125597] [2025-02-06 13:06:44,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649125597] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:44,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:44,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:06:44,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26616073] [2025-02-06 13:06:44,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:44,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:06:44,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:44,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:06:44,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:06:44,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:44,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:44,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:44,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:44,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:44,633 INFO L124 PetriNetUnfolderBase]: 219/390 cut-off events. [2025-02-06 13:06:44,633 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-06 13:06:44,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 390 events. 219/390 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1954 event pairs, 182 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 729. Up to 373 conditions per place. [2025-02-06 13:06:44,639 INFO L140 encePairwiseOnDemand]: 37/54 looper letters, 28 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2025-02-06 13:06:44,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 142 flow [2025-02-06 13:06:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:06:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:06:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2025-02-06 13:06:44,651 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2025-02-06 13:06:44,652 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 114 flow. Second operand 3 states and 69 transitions. [2025-02-06 13:06:44,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 142 flow [2025-02-06 13:06:44,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:44,658 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2025-02-06 13:06:44,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2025-02-06 13:06:44,662 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -18 predicate places. [2025-02-06 13:06:44,662 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2025-02-06 13:06:44,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:44,662 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:44,662 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:06:44,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:06:44,663 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:44,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash 589507, now seen corresponding path program 1 times [2025-02-06 13:06:44,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:44,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568479254] [2025-02-06 13:06:44,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:44,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:44,668 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:06:44,682 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:06:44,682 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:44,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:44,892 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 13:06:44,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:44,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568479254] [2025-02-06 13:06:44,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568479254] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:44,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:44,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:44,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110379810] [2025-02-06 13:06:44,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:44,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:44,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:44,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:44,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:44,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:44,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:44,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:44,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:44,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:45,057 INFO L124 PetriNetUnfolderBase]: 219/389 cut-off events. [2025-02-06 13:06:45,057 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 13:06:45,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 389 events. 219/389 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1973 event pairs, 182 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 761. Up to 377 conditions per place. [2025-02-06 13:06:45,073 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 27 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2025-02-06 13:06:45,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 138 flow [2025-02-06 13:06:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2025-02-06 13:06:45,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2962962962962963 [2025-02-06 13:06:45,080 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 64 transitions. [2025-02-06 13:06:45,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 138 flow [2025-02-06 13:06:45,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:45,081 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 80 flow [2025-02-06 13:06:45,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2025-02-06 13:06:45,081 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -18 predicate places. [2025-02-06 13:06:45,081 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 80 flow [2025-02-06 13:06:45,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:45,081 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:45,081 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:06:45,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:06:45,081 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:45,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:45,082 INFO L85 PathProgramCache]: Analyzing trace with hash 18276364, now seen corresponding path program 1 times [2025-02-06 13:06:45,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:45,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648856633] [2025-02-06 13:06:45,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:45,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:45,092 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:06:45,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:06:45,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:45,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:45,248 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 13:06:45,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:45,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648856633] [2025-02-06 13:06:45,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648856633] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:45,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:45,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:45,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908373023] [2025-02-06 13:06:45,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:45,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:45,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:45,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:45,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:45,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:45,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:45,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:45,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:45,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:45,430 INFO L124 PetriNetUnfolderBase]: 221/395 cut-off events. [2025-02-06 13:06:45,431 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 13:06:45,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 395 events. 221/395 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1987 event pairs, 182 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 775. Up to 380 conditions per place. [2025-02-06 13:06:45,433 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 30 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2025-02-06 13:06:45,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 172 flow [2025-02-06 13:06:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2025-02-06 13:06:45,436 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28888888888888886 [2025-02-06 13:06:45,437 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 80 flow. Second operand 5 states and 78 transitions. [2025-02-06 13:06:45,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 172 flow [2025-02-06 13:06:45,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:45,438 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 125 flow [2025-02-06 13:06:45,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2025-02-06 13:06:45,439 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -14 predicate places. [2025-02-06 13:06:45,439 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 125 flow [2025-02-06 13:06:45,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:45,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:45,439 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 13:06:45,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:06:45,439 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:45,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash 383734945, now seen corresponding path program 1 times [2025-02-06 13:06:45,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:45,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585189545] [2025-02-06 13:06:45,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:45,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:45,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:06:45,453 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:06:45,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:45,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:45,651 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 13:06:45,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:45,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585189545] [2025-02-06 13:06:45,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585189545] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:45,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714489728] [2025-02-06 13:06:45,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:45,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:45,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:45,656 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 13:06:45,657 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 13:06:45,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:06:45,716 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:06:45,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:45,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:45,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:06:45,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:45,758 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 13:06:45,916 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 13:06:45,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:46,111 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 13:06:46,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714489728] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:46,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:46,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:06:46,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704456212] [2025-02-06 13:06:46,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:46,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:06:46,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:46,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:06:46,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:06:46,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:46,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 125 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:46,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:46,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:46,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:46,452 INFO L124 PetriNetUnfolderBase]: 221/394 cut-off events. [2025-02-06 13:06:46,452 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:06:46,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 394 events. 221/394 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1972 event pairs, 182 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 771. Up to 373 conditions per place. [2025-02-06 13:06:46,454 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 24 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2025-02-06 13:06:46,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 193 flow [2025-02-06 13:06:46,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:06:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:06:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2025-02-06 13:06:46,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.24603174603174602 [2025-02-06 13:06:46,456 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 125 flow. Second operand 7 states and 93 transitions. [2025-02-06 13:06:46,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 193 flow [2025-02-06 13:06:46,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:46,457 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 144 flow [2025-02-06 13:06:46,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=144, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2025-02-06 13:06:46,458 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2025-02-06 13:06:46,458 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 144 flow [2025-02-06 13:06:46,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:46,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:46,458 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:46,467 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 13:06:46,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:46,662 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:46,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:46,663 INFO L85 PathProgramCache]: Analyzing trace with hash -986944888, now seen corresponding path program 1 times [2025-02-06 13:06:46,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:46,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814040905] [2025-02-06 13:06:46,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:46,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:46,669 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:06:46,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:06:46,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:46,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:46,794 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 13:06:46,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:46,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814040905] [2025-02-06 13:06:46,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814040905] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:46,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:46,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:46,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326355575] [2025-02-06 13:06:46,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:46,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:46,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:46,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:46,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:46,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2025-02-06 13:06:46,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:46,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:46,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2025-02-06 13:06:46,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:46,968 INFO L124 PetriNetUnfolderBase]: 260/484 cut-off events. [2025-02-06 13:06:46,968 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-06 13:06:46,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 484 events. 260/484 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 2479 event pairs, 220 based on Foata normal form. 12/344 useless extension candidates. Maximal degree in co-relation 775. Up to 382 conditions per place. [2025-02-06 13:06:46,971 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 45 selfloop transitions, 7 changer transitions 2/57 dead transitions. [2025-02-06 13:06:46,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 322 flow [2025-02-06 13:06:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2025-02-06 13:06:46,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2025-02-06 13:06:46,972 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 144 flow. Second operand 5 states and 109 transitions. [2025-02-06 13:06:46,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 322 flow [2025-02-06 13:06:46,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 273 flow, removed 8 selfloop flow, removed 6 redundant places. [2025-02-06 13:06:46,974 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 178 flow [2025-02-06 13:06:46,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2025-02-06 13:06:46,974 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2025-02-06 13:06:46,974 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 178 flow [2025-02-06 13:06:46,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:46,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:46,975 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:46,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:06:46,975 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:46,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:46,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1715622648, now seen corresponding path program 1 times [2025-02-06 13:06:46,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:46,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250863637] [2025-02-06 13:06:46,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:46,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:46,980 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:06:46,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:06:46,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:46,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:47,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:47,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250863637] [2025-02-06 13:06:47,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250863637] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:47,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:47,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:06:47,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657739477] [2025-02-06 13:06:47,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:47,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:47,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:47,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:47,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:47,065 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:47,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:47,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:47,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:47,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:47,146 INFO L124 PetriNetUnfolderBase]: 212/402 cut-off events. [2025-02-06 13:06:47,147 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2025-02-06 13:06:47,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 402 events. 212/402 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 1949 event pairs, 176 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 724. Up to 374 conditions per place. [2025-02-06 13:06:47,150 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 32 selfloop transitions, 6 changer transitions 0/41 dead transitions. [2025-02-06 13:06:47,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 246 flow [2025-02-06 13:06:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2025-02-06 13:06:47,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.25925925925925924 [2025-02-06 13:06:47,152 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 178 flow. Second operand 5 states and 70 transitions. [2025-02-06 13:06:47,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 246 flow [2025-02-06 13:06:47,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 242 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:47,155 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 178 flow [2025-02-06 13:06:47,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2025-02-06 13:06:47,156 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2025-02-06 13:06:47,156 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 178 flow [2025-02-06 13:06:47,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:47,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:47,157 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:47,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:06:47,157 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:47,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1715622649, now seen corresponding path program 1 times [2025-02-06 13:06:47,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:47,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202515635] [2025-02-06 13:06:47,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:47,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:47,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:06:47,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:06:47,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:47,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:47,310 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 13:06:47,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:47,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202515635] [2025-02-06 13:06:47,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202515635] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:47,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968687687] [2025-02-06 13:06:47,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:47,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:47,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:47,315 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 13:06:47,316 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 13:06:47,359 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:06:47,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:06:47,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:47,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:47,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:06:47,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:47,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:06:47,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:06:47,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 13:06:47,443 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:06:47,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:06:47,481 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 13:06:47,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:47,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2025-02-06 13:06:47,653 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 13:06:47,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968687687] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:47,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:47,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:06:47,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458045273] [2025-02-06 13:06:47,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:47,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:06:47,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:47,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:06:47,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:06:47,763 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:47,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 178 flow. Second operand has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:47,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:47,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:47,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:48,095 INFO L124 PetriNetUnfolderBase]: 403/749 cut-off events. [2025-02-06 13:06:48,096 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2025-02-06 13:06:48,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 749 events. 403/749 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3781 event pairs, 187 based on Foata normal form. 1/568 useless extension candidates. Maximal degree in co-relation 1482. Up to 272 conditions per place. [2025-02-06 13:06:48,099 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 60 selfloop transitions, 15 changer transitions 1/79 dead transitions. [2025-02-06 13:06:48,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 441 flow [2025-02-06 13:06:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:06:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:06:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2025-02-06 13:06:48,100 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33101851851851855 [2025-02-06 13:06:48,100 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 178 flow. Second operand 8 states and 143 transitions. [2025-02-06 13:06:48,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 441 flow [2025-02-06 13:06:48,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 79 transitions, 425 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:48,102 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 253 flow [2025-02-06 13:06:48,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=253, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2025-02-06 13:06:48,103 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2025-02-06 13:06:48,103 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 253 flow [2025-02-06 13:06:48,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:48,103 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:48,103 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:48,110 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 13:06:48,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:48,308 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:48,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:48,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1715622654, now seen corresponding path program 1 times [2025-02-06 13:06:48,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:48,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49173537] [2025-02-06 13:06:48,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:48,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:48,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:06:48,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:06:48,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:48,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:48,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:48,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49173537] [2025-02-06 13:06:48,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49173537] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:48,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:48,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:48,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183112087] [2025-02-06 13:06:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:48,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:48,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:48,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:48,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:48,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:48,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:48,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:48,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:48,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:48,446 INFO L124 PetriNetUnfolderBase]: 295/570 cut-off events. [2025-02-06 13:06:48,447 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2025-02-06 13:06:48,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 570 events. 295/570 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2694 event pairs, 219 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 1278. Up to 518 conditions per place. [2025-02-06 13:06:48,449 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 37 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2025-02-06 13:06:48,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 321 flow [2025-02-06 13:06:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2025-02-06 13:06:48,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2777777777777778 [2025-02-06 13:06:48,451 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 253 flow. Second operand 4 states and 60 transitions. [2025-02-06 13:06:48,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 321 flow [2025-02-06 13:06:48,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 45 transitions, 317 flow, removed 2 selfloop flow, removed 0 redundant places. [2025-02-06 13:06:48,453 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 243 flow [2025-02-06 13:06:48,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2025-02-06 13:06:48,453 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2025-02-06 13:06:48,453 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 243 flow [2025-02-06 13:06:48,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:48,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:48,454 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:48,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:06:48,454 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:48,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:48,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1715622655, now seen corresponding path program 1 times [2025-02-06 13:06:48,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:48,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687916074] [2025-02-06 13:06:48,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:48,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:48,459 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:06:48,464 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:06:48,464 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:48,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:48,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:48,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687916074] [2025-02-06 13:06:48,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687916074] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:48,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:48,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:48,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642060028] [2025-02-06 13:06:48,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:48,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:06:48,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:48,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:06:48,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:06:48,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2025-02-06 13:06:48,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:48,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:48,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2025-02-06 13:06:48,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:48,682 INFO L124 PetriNetUnfolderBase]: 337/678 cut-off events. [2025-02-06 13:06:48,682 INFO L125 PetriNetUnfolderBase]: For 692/692 co-relation queries the response was YES. [2025-02-06 13:06:48,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1727 conditions, 678 events. 337/678 cut-off events. For 692/692 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3277 event pairs, 263 based on Foata normal form. 30/708 useless extension candidates. Maximal degree in co-relation 1433. Up to 528 conditions per place. [2025-02-06 13:06:48,686 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 36 selfloop transitions, 4 changer transitions 12/55 dead transitions. [2025-02-06 13:06:48,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 371 flow [2025-02-06 13:06:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2025-02-06 13:06:48,687 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-02-06 13:06:48,687 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 243 flow. Second operand 4 states and 84 transitions. [2025-02-06 13:06:48,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 371 flow [2025-02-06 13:06:48,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:48,689 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 233 flow [2025-02-06 13:06:48,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2025-02-06 13:06:48,691 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2025-02-06 13:06:48,691 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 233 flow [2025-02-06 13:06:48,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:48,691 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:48,691 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:48,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:06:48,691 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:48,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:48,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1654701642, now seen corresponding path program 1 times [2025-02-06 13:06:48,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:48,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718178124] [2025-02-06 13:06:48,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:48,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:48,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:06:48,707 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:06:48,707 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:48,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:48,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:48,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718178124] [2025-02-06 13:06:48,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718178124] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:48,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301767702] [2025-02-06 13:06:48,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:48,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:48,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:48,876 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 13:06:48,883 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 13:06:48,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:06:48,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:06:48,943 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:48,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:48,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:06:48,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:48,989 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:48,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301767702] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:48,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:06:48,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2025-02-06 13:06:48,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837013341] [2025-02-06 13:06:48,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:48,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:48,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:48,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:48,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:06:49,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2025-02-06 13:06:49,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:49,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:49,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2025-02-06 13:06:49,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:49,071 INFO L124 PetriNetUnfolderBase]: 201/413 cut-off events. [2025-02-06 13:06:49,071 INFO L125 PetriNetUnfolderBase]: For 672/672 co-relation queries the response was YES. [2025-02-06 13:06:49,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1114 conditions, 413 events. 201/413 cut-off events. For 672/672 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1729 event pairs, 147 based on Foata normal form. 56/460 useless extension candidates. Maximal degree in co-relation 963. Up to 364 conditions per place. [2025-02-06 13:06:49,074 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 30 selfloop transitions, 2 changer transitions 5/40 dead transitions. [2025-02-06 13:06:49,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 40 transitions, 287 flow [2025-02-06 13:06:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2025-02-06 13:06:49,074 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3055555555555556 [2025-02-06 13:06:49,075 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 233 flow. Second operand 4 states and 66 transitions. [2025-02-06 13:06:49,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 40 transitions, 287 flow [2025-02-06 13:06:49,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 272 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:49,076 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 161 flow [2025-02-06 13:06:49,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2025-02-06 13:06:49,077 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2025-02-06 13:06:49,078 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 161 flow [2025-02-06 13:06:49,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:49,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:49,078 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:49,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:49,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:49,278 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:49,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:49,279 INFO L85 PathProgramCache]: Analyzing trace with hash 985119720, now seen corresponding path program 1 times [2025-02-06 13:06:49,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:49,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566949011] [2025-02-06 13:06:49,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:49,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:49,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:06:49,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:06:49,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:49,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:49,477 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 13:06:49,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:49,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566949011] [2025-02-06 13:06:49,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566949011] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:49,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:49,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:06:49,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360772057] [2025-02-06 13:06:49,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:49,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:49,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:49,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:49,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:49,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:49,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 161 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 13:06:49,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:49,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:49,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:49,539 INFO L124 PetriNetUnfolderBase]: 124/250 cut-off events. [2025-02-06 13:06:49,539 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2025-02-06 13:06:49,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 250 events. 124/250 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 877 event pairs, 81 based on Foata normal form. 28/272 useless extension candidates. Maximal degree in co-relation 622. Up to 221 conditions per place. [2025-02-06 13:06:49,540 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 28 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2025-02-06 13:06:49,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 33 transitions, 209 flow [2025-02-06 13:06:49,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:06:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:06:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2025-02-06 13:06:49,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.25925925925925924 [2025-02-06 13:06:49,541 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 161 flow. Second operand 4 states and 56 transitions. [2025-02-06 13:06:49,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 33 transitions, 209 flow [2025-02-06 13:06:49,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 189 flow, removed 5 selfloop flow, removed 6 redundant places. [2025-02-06 13:06:49,542 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 133 flow [2025-02-06 13:06:49,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2025-02-06 13:06:49,542 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2025-02-06 13:06:49,542 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 133 flow [2025-02-06 13:06:49,543 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 13:06:49,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:49,543 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 13:06:49,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 13:06:49,543 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:49,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:49,543 INFO L85 PathProgramCache]: Analyzing trace with hash -502012040, now seen corresponding path program 1 times [2025-02-06 13:06:49,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:49,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022611476] [2025-02-06 13:06:49,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:49,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:49,552 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:06:49,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:49,557 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:49,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:49,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:49,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022611476] [2025-02-06 13:06:49,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022611476] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:49,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:49,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 13:06:49,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813188928] [2025-02-06 13:06:49,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:49,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:06:49,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:49,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:06:49,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:06:49,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2025-02-06 13:06:49,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 133 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:49,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:49,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2025-02-06 13:06:49,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:49,741 INFO L124 PetriNetUnfolderBase]: 259/472 cut-off events. [2025-02-06 13:06:49,742 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2025-02-06 13:06:49,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 472 events. 259/472 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1979 event pairs, 83 based on Foata normal form. 13/446 useless extension candidates. Maximal degree in co-relation 1112. Up to 273 conditions per place. [2025-02-06 13:06:49,744 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 60 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2025-02-06 13:06:49,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 394 flow [2025-02-06 13:06:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:06:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:06:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2025-02-06 13:06:49,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3395061728395062 [2025-02-06 13:06:49,745 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 133 flow. Second operand 6 states and 110 transitions. [2025-02-06 13:06:49,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 394 flow [2025-02-06 13:06:49,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 365 flow, removed 13 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:49,748 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 182 flow [2025-02-06 13:06:49,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2025-02-06 13:06:49,748 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2025-02-06 13:06:49,748 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 182 flow [2025-02-06 13:06:49,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:49,748 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:49,749 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 13:06:49,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 13:06:49,749 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:49,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:49,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1851432228, now seen corresponding path program 2 times [2025-02-06 13:06:49,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:49,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662168408] [2025-02-06 13:06:49,749 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:49,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:49,758 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:49,767 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:49,767 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:49,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:49,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:49,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662168408] [2025-02-06 13:06:49,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662168408] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:49,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068995129] [2025-02-06 13:06:49,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:49,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:49,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:49,819 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 13:06:49,826 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 13:06:49,875 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:49,894 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:49,894 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:49,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:49,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 13:06:49,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:49,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:49,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068995129] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:49,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:49,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2025-02-06 13:06:49,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813698388] [2025-02-06 13:06:49,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:49,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:06:49,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:49,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:06:49,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:06:49,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:49,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 182 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:49,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:49,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:49,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:50,242 INFO L124 PetriNetUnfolderBase]: 394/688 cut-off events. [2025-02-06 13:06:50,242 INFO L125 PetriNetUnfolderBase]: For 437/437 co-relation queries the response was YES. [2025-02-06 13:06:50,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 688 events. 394/688 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2907 event pairs, 23 based on Foata normal form. 9/661 useless extension candidates. Maximal degree in co-relation 2071. Up to 140 conditions per place. [2025-02-06 13:06:50,246 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 87 selfloop transitions, 30 changer transitions 0/118 dead transitions. [2025-02-06 13:06:50,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 118 transitions, 708 flow [2025-02-06 13:06:50,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:06:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:06:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 212 transitions. [2025-02-06 13:06:50,248 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2804232804232804 [2025-02-06 13:06:50,248 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 182 flow. Second operand 14 states and 212 transitions. [2025-02-06 13:06:50,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 118 transitions, 708 flow [2025-02-06 13:06:50,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 118 transitions, 700 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:50,252 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 362 flow [2025-02-06 13:06:50,252 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=362, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2025-02-06 13:06:50,254 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2025-02-06 13:06:50,255 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 362 flow [2025-02-06 13:06:50,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:50,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:50,255 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 13:06:50,265 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 13:06:50,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-06 13:06:50,456 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:50,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:50,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2012993995, now seen corresponding path program 1 times [2025-02-06 13:06:50,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:50,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844075990] [2025-02-06 13:06:50,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:50,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:50,467 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:06:50,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:50,474 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:50,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:50,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:50,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844075990] [2025-02-06 13:06:50,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844075990] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:50,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:50,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:50,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883618392] [2025-02-06 13:06:50,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:50,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:50,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:50,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:50,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:50,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2025-02-06 13:06:50,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:50,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:50,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2025-02-06 13:06:50,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:50,669 INFO L124 PetriNetUnfolderBase]: 330/604 cut-off events. [2025-02-06 13:06:50,669 INFO L125 PetriNetUnfolderBase]: For 1142/1156 co-relation queries the response was YES. [2025-02-06 13:06:50,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 604 events. 330/604 cut-off events. For 1142/1156 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2679 event pairs, 95 based on Foata normal form. 3/598 useless extension candidates. Maximal degree in co-relation 2152. Up to 372 conditions per place. [2025-02-06 13:06:50,672 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 69 selfloop transitions, 7 changer transitions 6/86 dead transitions. [2025-02-06 13:06:50,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 639 flow [2025-02-06 13:06:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2025-02-06 13:06:50,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34814814814814815 [2025-02-06 13:06:50,673 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 362 flow. Second operand 5 states and 94 transitions. [2025-02-06 13:06:50,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 639 flow [2025-02-06 13:06:50,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 598 flow, removed 13 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:50,681 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 347 flow [2025-02-06 13:06:50,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2025-02-06 13:06:50,681 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2025-02-06 13:06:50,682 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 347 flow [2025-02-06 13:06:50,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:50,682 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:50,682 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 13:06:50,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:06:50,682 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:50,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:50,683 INFO L85 PathProgramCache]: Analyzing trace with hash 410813867, now seen corresponding path program 2 times [2025-02-06 13:06:50,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:50,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093748936] [2025-02-06 13:06:50,683 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:50,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:50,689 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:50,695 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:50,696 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:50,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:50,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:50,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093748936] [2025-02-06 13:06:50,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093748936] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:50,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54590061] [2025-02-06 13:06:50,739 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:50,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:50,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:50,742 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 13:06:50,743 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 13:06:50,791 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:50,808 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:50,809 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:50,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:50,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 13:06:50,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:50,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:50,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54590061] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:50,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:50,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2025-02-06 13:06:50,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573959935] [2025-02-06 13:06:50,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:50,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:06:50,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:50,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:06:50,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:06:50,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:50,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 347 flow. Second operand has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 9 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:50,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:50,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:50,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:51,133 INFO L124 PetriNetUnfolderBase]: 553/960 cut-off events. [2025-02-06 13:06:51,133 INFO L125 PetriNetUnfolderBase]: For 1660/1660 co-relation queries the response was YES. [2025-02-06 13:06:51,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 960 events. 553/960 cut-off events. For 1660/1660 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4308 event pairs, 23 based on Foata normal form. 12/972 useless extension candidates. Maximal degree in co-relation 3439. Up to 172 conditions per place. [2025-02-06 13:06:51,137 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 100 selfloop transitions, 67 changer transitions 1/169 dead transitions. [2025-02-06 13:06:51,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 169 transitions, 1251 flow [2025-02-06 13:06:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:06:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:06:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 207 transitions. [2025-02-06 13:06:51,139 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27380952380952384 [2025-02-06 13:06:51,139 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 347 flow. Second operand 14 states and 207 transitions. [2025-02-06 13:06:51,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 169 transitions, 1251 flow [2025-02-06 13:06:51,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 169 transitions, 1195 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:51,145 INFO L231 Difference]: Finished difference. Result has 87 places, 111 transitions, 901 flow [2025-02-06 13:06:51,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=901, PETRI_PLACES=87, PETRI_TRANSITIONS=111} [2025-02-06 13:06:51,145 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 33 predicate places. [2025-02-06 13:06:51,145 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 111 transitions, 901 flow [2025-02-06 13:06:51,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 9 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:51,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:51,145 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 13:06:51,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:06:51,350 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,SelfDestructingSolverStorable14 [2025-02-06 13:06:51,350 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:51,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:51,351 INFO L85 PathProgramCache]: Analyzing trace with hash -417011846, now seen corresponding path program 3 times [2025-02-06 13:06:51,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:51,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074681899] [2025-02-06 13:06:51,351 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:51,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:51,359 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:51,364 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:51,364 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:51,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:51,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:51,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074681899] [2025-02-06 13:06:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074681899] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:51,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:51,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:51,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643920191] [2025-02-06 13:06:51,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:51,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:51,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:51,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:51,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:51,430 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2025-02-06 13:06:51,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 111 transitions, 901 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:51,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:51,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2025-02-06 13:06:51,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:51,585 INFO L124 PetriNetUnfolderBase]: 535/960 cut-off events. [2025-02-06 13:06:51,586 INFO L125 PetriNetUnfolderBase]: For 3295/3305 co-relation queries the response was YES. [2025-02-06 13:06:51,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4246 conditions, 960 events. 535/960 cut-off events. For 3295/3305 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4618 event pairs, 129 based on Foata normal form. 2/956 useless extension candidates. Maximal degree in co-relation 4200. Up to 604 conditions per place. [2025-02-06 13:06:51,591 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 94 selfloop transitions, 30 changer transitions 2/142 dead transitions. [2025-02-06 13:06:51,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 142 transitions, 1390 flow [2025-02-06 13:06:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2025-02-06 13:06:51,592 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34074074074074073 [2025-02-06 13:06:51,593 INFO L175 Difference]: Start difference. First operand has 87 places, 111 transitions, 901 flow. Second operand 5 states and 92 transitions. [2025-02-06 13:06:51,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 142 transitions, 1390 flow [2025-02-06 13:06:51,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 142 transitions, 1332 flow, removed 29 selfloop flow, removed 0 redundant places. [2025-02-06 13:06:51,603 INFO L231 Difference]: Finished difference. Result has 94 places, 120 transitions, 1059 flow [2025-02-06 13:06:51,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1059, PETRI_PLACES=94, PETRI_TRANSITIONS=120} [2025-02-06 13:06:51,604 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 40 predicate places. [2025-02-06 13:06:51,604 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 120 transitions, 1059 flow [2025-02-06 13:06:51,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:51,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:51,604 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 13:06:51,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-06 13:06:51,604 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:51,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:51,605 INFO L85 PathProgramCache]: Analyzing trace with hash -373096488, now seen corresponding path program 4 times [2025-02-06 13:06:51,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:51,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864053195] [2025-02-06 13:06:51,605 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:51,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:51,610 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:51,613 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 22 statements. [2025-02-06 13:06:51,613 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:06:51,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:51,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:51,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864053195] [2025-02-06 13:06:51,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864053195] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:51,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:51,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:51,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326234772] [2025-02-06 13:06:51,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:51,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:51,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:51,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:51,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:51,645 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:51,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 120 transitions, 1059 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:51,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:51,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:51,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:51,789 INFO L124 PetriNetUnfolderBase]: 596/1029 cut-off events. [2025-02-06 13:06:51,789 INFO L125 PetriNetUnfolderBase]: For 3548/3548 co-relation queries the response was YES. [2025-02-06 13:06:51,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4670 conditions, 1029 events. 596/1029 cut-off events. For 3548/3548 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4668 event pairs, 134 based on Foata normal form. 2/1031 useless extension candidates. Maximal degree in co-relation 4620. Up to 557 conditions per place. [2025-02-06 13:06:51,795 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 116 selfloop transitions, 26 changer transitions 4/147 dead transitions. [2025-02-06 13:06:51,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1541 flow [2025-02-06 13:06:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2025-02-06 13:06:51,797 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32222222222222224 [2025-02-06 13:06:51,797 INFO L175 Difference]: Start difference. First operand has 94 places, 120 transitions, 1059 flow. Second operand 5 states and 87 transitions. [2025-02-06 13:06:51,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1541 flow [2025-02-06 13:06:51,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1486 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:51,807 INFO L231 Difference]: Finished difference. Result has 98 places, 120 transitions, 1074 flow [2025-02-06 13:06:51,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1074, PETRI_PLACES=98, PETRI_TRANSITIONS=120} [2025-02-06 13:06:51,807 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 44 predicate places. [2025-02-06 13:06:51,807 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 120 transitions, 1074 flow [2025-02-06 13:06:51,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:51,808 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:51,808 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 13:06:51,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-06 13:06:51,808 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:51,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1763715349, now seen corresponding path program 3 times [2025-02-06 13:06:51,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:51,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72483625] [2025-02-06 13:06:51,809 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:51,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:51,814 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:51,818 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:51,818 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:51,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:51,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:51,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72483625] [2025-02-06 13:06:51,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72483625] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:51,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776024483] [2025-02-06 13:06:51,861 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:51,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:51,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:51,863 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 13:06:51,869 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 13:06:51,918 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:51,953 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:51,954 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:51,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:51,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 13:06:51,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:51,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:52,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776024483] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:52,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:52,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2025-02-06 13:06:52,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143550739] [2025-02-06 13:06:52,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:52,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:06:52,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:52,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:06:52,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:06:52,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:52,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 120 transitions, 1074 flow. Second operand has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:52,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:52,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:52,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:52,252 INFO L124 PetriNetUnfolderBase]: 628/1081 cut-off events. [2025-02-06 13:06:52,252 INFO L125 PetriNetUnfolderBase]: For 4328/4328 co-relation queries the response was YES. [2025-02-06 13:06:52,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4879 conditions, 1081 events. 628/1081 cut-off events. For 4328/4328 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4989 event pairs, 110 based on Foata normal form. 16/1097 useless extension candidates. Maximal degree in co-relation 4828. Up to 469 conditions per place. [2025-02-06 13:06:52,259 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 113 selfloop transitions, 52 changer transitions 0/166 dead transitions. [2025-02-06 13:06:52,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 166 transitions, 1662 flow [2025-02-06 13:06:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:06:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:06:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2025-02-06 13:06:52,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32407407407407407 [2025-02-06 13:06:52,260 INFO L175 Difference]: Start difference. First operand has 98 places, 120 transitions, 1074 flow. Second operand 8 states and 140 transitions. [2025-02-06 13:06:52,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 166 transitions, 1662 flow [2025-02-06 13:06:52,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 166 transitions, 1608 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-06 13:06:52,272 INFO L231 Difference]: Finished difference. Result has 103 places, 127 transitions, 1227 flow [2025-02-06 13:06:52,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1227, PETRI_PLACES=103, PETRI_TRANSITIONS=127} [2025-02-06 13:06:52,272 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2025-02-06 13:06:52,272 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 127 transitions, 1227 flow [2025-02-06 13:06:52,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:52,273 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:52,274 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 13:06:52,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 13:06:52,479 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,SelfDestructingSolverStorable17 [2025-02-06 13:06:52,479 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:52,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash 26565571, now seen corresponding path program 4 times [2025-02-06 13:06:52,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:52,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763741491] [2025-02-06 13:06:52,480 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:52,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:52,485 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:52,487 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 22 statements. [2025-02-06 13:06:52,488 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:06:52,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:52,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:52,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763741491] [2025-02-06 13:06:52,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763741491] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:52,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:52,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:52,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723398295] [2025-02-06 13:06:52,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:52,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:52,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:52,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:52,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:52,510 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:52,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 127 transitions, 1227 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:52,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:52,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:52,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:52,666 INFO L124 PetriNetUnfolderBase]: 640/1111 cut-off events. [2025-02-06 13:06:52,666 INFO L125 PetriNetUnfolderBase]: For 4837/4837 co-relation queries the response was YES. [2025-02-06 13:06:52,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5275 conditions, 1111 events. 640/1111 cut-off events. For 4837/4837 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5203 event pairs, 93 based on Foata normal form. 6/1117 useless extension candidates. Maximal degree in co-relation 5222. Up to 646 conditions per place. [2025-02-06 13:06:52,673 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 125 selfloop transitions, 31 changer transitions 1/158 dead transitions. [2025-02-06 13:06:52,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 158 transitions, 1760 flow [2025-02-06 13:06:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2025-02-06 13:06:52,674 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31851851851851853 [2025-02-06 13:06:52,674 INFO L175 Difference]: Start difference. First operand has 103 places, 127 transitions, 1227 flow. Second operand 5 states and 86 transitions. [2025-02-06 13:06:52,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 158 transitions, 1760 flow [2025-02-06 13:06:52,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 158 transitions, 1720 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:52,687 INFO L231 Difference]: Finished difference. Result has 108 places, 134 transitions, 1391 flow [2025-02-06 13:06:52,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1391, PETRI_PLACES=108, PETRI_TRANSITIONS=134} [2025-02-06 13:06:52,687 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2025-02-06 13:06:52,687 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 134 transitions, 1391 flow [2025-02-06 13:06:52,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:52,688 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:52,688 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 13:06:52,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-06 13:06:52,688 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:52,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:52,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1798647927, now seen corresponding path program 5 times [2025-02-06 13:06:52,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:52,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942324304] [2025-02-06 13:06:52,688 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:52,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:52,694 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:52,699 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:52,699 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:52,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:52,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:52,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942324304] [2025-02-06 13:06:52,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942324304] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:52,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:52,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:52,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179711235] [2025-02-06 13:06:52,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:52,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:52,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:52,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:52,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:52,741 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2025-02-06 13:06:52,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 134 transitions, 1391 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:52,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:52,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2025-02-06 13:06:52,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:52,889 INFO L124 PetriNetUnfolderBase]: 572/1016 cut-off events. [2025-02-06 13:06:52,889 INFO L125 PetriNetUnfolderBase]: For 5382/5392 co-relation queries the response was YES. [2025-02-06 13:06:52,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5058 conditions, 1016 events. 572/1016 cut-off events. For 5382/5392 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4902 event pairs, 144 based on Foata normal form. 3/1002 useless extension candidates. Maximal degree in co-relation 5001. Up to 630 conditions per place. [2025-02-06 13:06:52,896 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 102 selfloop transitions, 29 changer transitions 4/155 dead transitions. [2025-02-06 13:06:52,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 155 transitions, 1768 flow [2025-02-06 13:06:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2025-02-06 13:06:52,897 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.337037037037037 [2025-02-06 13:06:52,897 INFO L175 Difference]: Start difference. First operand has 108 places, 134 transitions, 1391 flow. Second operand 5 states and 91 transitions. [2025-02-06 13:06:52,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 155 transitions, 1768 flow [2025-02-06 13:06:52,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1717 flow, removed 16 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:52,910 INFO L231 Difference]: Finished difference. Result has 112 places, 133 transitions, 1392 flow [2025-02-06 13:06:52,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1392, PETRI_PLACES=112, PETRI_TRANSITIONS=133} [2025-02-06 13:06:52,911 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2025-02-06 13:06:52,911 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 133 transitions, 1392 flow [2025-02-06 13:06:52,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:52,911 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:52,911 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 13:06:52,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-06 13:06:52,911 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:52,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1853792278, now seen corresponding path program 5 times [2025-02-06 13:06:52,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:52,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909671044] [2025-02-06 13:06:52,912 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:52,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:52,917 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:52,923 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:52,924 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:52,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:52,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:52,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909671044] [2025-02-06 13:06:52,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909671044] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:52,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816749179] [2025-02-06 13:06:52,953 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:06:52,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:52,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:52,955 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 13:06:52,956 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 13:06:53,010 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:53,028 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:53,028 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:53,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:53,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 13:06:53,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:53,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:53,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816749179] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:53,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:53,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-02-06 13:06:53,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067676620] [2025-02-06 13:06:53,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:53,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:06:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:53,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:06:53,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:06:53,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:53,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 133 transitions, 1392 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:53,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:53,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:53,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:53,292 INFO L124 PetriNetUnfolderBase]: 697/1212 cut-off events. [2025-02-06 13:06:53,292 INFO L125 PetriNetUnfolderBase]: For 6178/6178 co-relation queries the response was YES. [2025-02-06 13:06:53,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5960 conditions, 1212 events. 697/1212 cut-off events. For 6178/6178 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5924 event pairs, 47 based on Foata normal form. 9/1221 useless extension candidates. Maximal degree in co-relation 5902. Up to 349 conditions per place. [2025-02-06 13:06:53,299 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 117 selfloop transitions, 64 changer transitions 0/182 dead transitions. [2025-02-06 13:06:53,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 182 transitions, 2088 flow [2025-02-06 13:06:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:06:53,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:06:53,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2025-02-06 13:06:53,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28935185185185186 [2025-02-06 13:06:53,302 INFO L175 Difference]: Start difference. First operand has 112 places, 133 transitions, 1392 flow. Second operand 8 states and 125 transitions. [2025-02-06 13:06:53,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 182 transitions, 2088 flow [2025-02-06 13:06:53,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 182 transitions, 2024 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-02-06 13:06:53,317 INFO L231 Difference]: Finished difference. Result has 119 places, 149 transitions, 1716 flow [2025-02-06 13:06:53,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1716, PETRI_PLACES=119, PETRI_TRANSITIONS=149} [2025-02-06 13:06:53,318 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2025-02-06 13:06:53,318 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 149 transitions, 1716 flow [2025-02-06 13:06:53,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:53,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:53,318 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 13:06:53,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 13:06:53,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:53,519 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:53,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1989288998, now seen corresponding path program 6 times [2025-02-06 13:06:53,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:53,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118012706] [2025-02-06 13:06:53,519 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:06:53,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:53,525 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:53,533 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:53,533 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 13:06:53,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:53,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:53,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118012706] [2025-02-06 13:06:53,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118012706] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:53,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:06:53,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:06:53,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524256168] [2025-02-06 13:06:53,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:53,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:06:53,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:53,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:06:53,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:06:53,589 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2025-02-06 13:06:53,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 149 transitions, 1716 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:53,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:53,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2025-02-06 13:06:53,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:53,779 INFO L124 PetriNetUnfolderBase]: 623/1127 cut-off events. [2025-02-06 13:06:53,780 INFO L125 PetriNetUnfolderBase]: For 7944/7950 co-relation queries the response was YES. [2025-02-06 13:06:53,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6048 conditions, 1127 events. 623/1127 cut-off events. For 7944/7950 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5790 event pairs, 128 based on Foata normal form. 2/1109 useless extension candidates. Maximal degree in co-relation 5987. Up to 608 conditions per place. [2025-02-06 13:06:53,790 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 104 selfloop transitions, 38 changer transitions 3/169 dead transitions. [2025-02-06 13:06:53,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 169 transitions, 2160 flow [2025-02-06 13:06:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2025-02-06 13:06:53,791 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.337037037037037 [2025-02-06 13:06:53,791 INFO L175 Difference]: Start difference. First operand has 119 places, 149 transitions, 1716 flow. Second operand 5 states and 91 transitions. [2025-02-06 13:06:53,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 169 transitions, 2160 flow [2025-02-06 13:06:53,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 169 transitions, 2151 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:53,818 INFO L231 Difference]: Finished difference. Result has 124 places, 150 transitions, 1827 flow [2025-02-06 13:06:53,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1827, PETRI_PLACES=124, PETRI_TRANSITIONS=150} [2025-02-06 13:06:53,819 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2025-02-06 13:06:53,819 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 150 transitions, 1827 flow [2025-02-06 13:06:53,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:53,819 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:53,819 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 13:06:53,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-06 13:06:53,819 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:53,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1057135177, now seen corresponding path program 6 times [2025-02-06 13:06:53,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:53,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576610780] [2025-02-06 13:06:53,820 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:06:53,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:53,828 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:53,833 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:53,833 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 13:06:53,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:53,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:53,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576610780] [2025-02-06 13:06:53,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576610780] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:53,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769703626] [2025-02-06 13:06:53,879 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:06:53,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:53,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:53,884 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 13:06:53,885 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 13:06:53,934 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:06:53,952 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:53,952 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 13:06:53,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:53,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 13:06:53,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:53,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:54,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769703626] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:54,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:54,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2025-02-06 13:06:54,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134748552] [2025-02-06 13:06:54,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:54,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:06:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:54,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:06:54,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:06:54,005 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:54,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 150 transitions, 1827 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:54,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:54,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:54,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:54,309 INFO L124 PetriNetUnfolderBase]: 749/1290 cut-off events. [2025-02-06 13:06:54,309 INFO L125 PetriNetUnfolderBase]: For 9345/9345 co-relation queries the response was YES. [2025-02-06 13:06:54,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7018 conditions, 1290 events. 749/1290 cut-off events. For 9345/9345 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6305 event pairs, 39 based on Foata normal form. 16/1306 useless extension candidates. Maximal degree in co-relation 6955. Up to 241 conditions per place. [2025-02-06 13:06:54,318 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 125 selfloop transitions, 92 changer transitions 1/219 dead transitions. [2025-02-06 13:06:54,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 219 transitions, 2660 flow [2025-02-06 13:06:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 13:06:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 13:06:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 229 transitions. [2025-02-06 13:06:54,320 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28271604938271605 [2025-02-06 13:06:54,320 INFO L175 Difference]: Start difference. First operand has 124 places, 150 transitions, 1827 flow. Second operand 15 states and 229 transitions. [2025-02-06 13:06:54,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 219 transitions, 2660 flow [2025-02-06 13:06:54,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 219 transitions, 2585 flow, removed 7 selfloop flow, removed 6 redundant places. [2025-02-06 13:06:54,344 INFO L231 Difference]: Finished difference. Result has 133 places, 159 transitions, 2053 flow [2025-02-06 13:06:54,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2053, PETRI_PLACES=133, PETRI_TRANSITIONS=159} [2025-02-06 13:06:54,345 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2025-02-06 13:06:54,345 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 159 transitions, 2053 flow [2025-02-06 13:06:54,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:54,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:54,345 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 13:06:54,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 13:06:54,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:54,546 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:54,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1040595268, now seen corresponding path program 7 times [2025-02-06 13:06:54,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:54,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504662415] [2025-02-06 13:06:54,547 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:06:54,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:54,552 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:06:54,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:54,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:54,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:54,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:54,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504662415] [2025-02-06 13:06:54,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504662415] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:54,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328025198] [2025-02-06 13:06:54,641 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:06:54,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:54,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:54,643 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 13:06:54,645 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 13:06:54,692 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:06:54,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:06:54,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:54,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:54,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 13:06:54,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:54,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:54,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328025198] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:54,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:54,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2025-02-06 13:06:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513778187] [2025-02-06 13:06:54,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:54,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:06:54,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:54,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:06:54,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:06:54,790 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:54,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 159 transitions, 2053 flow. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:54,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:54,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:54,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:54,996 INFO L124 PetriNetUnfolderBase]: 733/1257 cut-off events. [2025-02-06 13:06:54,996 INFO L125 PetriNetUnfolderBase]: For 10985/10985 co-relation queries the response was YES. [2025-02-06 13:06:55,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7095 conditions, 1257 events. 733/1257 cut-off events. For 10985/10985 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6100 event pairs, 110 based on Foata normal form. 9/1266 useless extension candidates. Maximal degree in co-relation 7035. Up to 475 conditions per place. [2025-02-06 13:06:55,004 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 127 selfloop transitions, 62 changer transitions 1/191 dead transitions. [2025-02-06 13:06:55,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 2602 flow [2025-02-06 13:06:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:06:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:06:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2025-02-06 13:06:55,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3101851851851852 [2025-02-06 13:06:55,005 INFO L175 Difference]: Start difference. First operand has 133 places, 159 transitions, 2053 flow. Second operand 8 states and 134 transitions. [2025-02-06 13:06:55,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 2602 flow [2025-02-06 13:06:55,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 2465 flow, removed 11 selfloop flow, removed 7 redundant places. [2025-02-06 13:06:55,027 INFO L231 Difference]: Finished difference. Result has 133 places, 159 transitions, 2026 flow [2025-02-06 13:06:55,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2026, PETRI_PLACES=133, PETRI_TRANSITIONS=159} [2025-02-06 13:06:55,028 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2025-02-06 13:06:55,028 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 159 transitions, 2026 flow [2025-02-06 13:06:55,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:55,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:55,028 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:55,038 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 13:06:55,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:55,234 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:55,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2011697012, now seen corresponding path program 1 times [2025-02-06 13:06:55,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:55,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253207167] [2025-02-06 13:06:55,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:55,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:55,245 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 13:06:55,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:06:55,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:55,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:55,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:55,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253207167] [2025-02-06 13:06:55,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253207167] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:55,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020986730] [2025-02-06 13:06:55,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:06:55,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:55,365 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 13:06:55,371 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 13:06:55,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-06 13:06:55,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:06:55,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:06:55,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:55,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:06:55,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:55,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:55,543 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 51 treesize of output 19 [2025-02-06 13:06:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:06:55,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020986730] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:55,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:55,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-02-06 13:06:55,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798864186] [2025-02-06 13:06:55,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:55,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:06:55,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:55,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:06:55,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:06:55,671 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2025-02-06 13:06:55,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 159 transitions, 2026 flow. Second operand has 13 states, 13 states have (on average 14.153846153846153) internal successors, (184), 13 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 13:06:55,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:55,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2025-02-06 13:06:55,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:56,040 INFO L124 PetriNetUnfolderBase]: 1449/2653 cut-off events. [2025-02-06 13:06:56,040 INFO L125 PetriNetUnfolderBase]: For 24767/24890 co-relation queries the response was YES. [2025-02-06 13:06:56,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15201 conditions, 2653 events. 1449/2653 cut-off events. For 24767/24890 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16329 event pairs, 189 based on Foata normal form. 101/2745 useless extension candidates. Maximal degree in co-relation 13755. Up to 851 conditions per place. [2025-02-06 13:06:56,059 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 331 selfloop transitions, 19 changer transitions 19/419 dead transitions. [2025-02-06 13:06:56,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 419 transitions, 6239 flow [2025-02-06 13:06:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:06:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:06:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2025-02-06 13:06:56,060 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.360082304526749 [2025-02-06 13:06:56,061 INFO L175 Difference]: Start difference. First operand has 133 places, 159 transitions, 2026 flow. Second operand 9 states and 175 transitions. [2025-02-06 13:06:56,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 419 transitions, 6239 flow [2025-02-06 13:06:56,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 419 transitions, 5735 flow, removed 24 selfloop flow, removed 12 redundant places. [2025-02-06 13:06:56,118 INFO L231 Difference]: Finished difference. Result has 133 places, 174 transitions, 1994 flow [2025-02-06 13:06:56,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1994, PETRI_PLACES=133, PETRI_TRANSITIONS=174} [2025-02-06 13:06:56,119 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2025-02-06 13:06:56,119 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 174 transitions, 1994 flow [2025-02-06 13:06:56,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.153846153846153) internal successors, (184), 13 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 13:06:56,119 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:56,119 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:56,128 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 13:06:56,319 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,SelfDestructingSolverStorable24 [2025-02-06 13:06:56,320 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:56,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1356971118, now seen corresponding path program 2 times [2025-02-06 13:06:56,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:56,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592193710] [2025-02-06 13:06:56,321 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:56,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:56,325 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-06 13:06:56,333 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:06:56,333 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:56,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:06:56,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592193710] [2025-02-06 13:06:56,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592193710] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174597123] [2025-02-06 13:06:56,497 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:06:56,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:56,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:56,503 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 13:06:56,504 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 13:06:56,566 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-06 13:06:56,585 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 13:06:56,585 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:06:56,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:56,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-06 13:06:56,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:56,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:06:56,666 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 37 [2025-02-06 13:06:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:06:56,678 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:06:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174597123] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:06:56,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:06:56,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2025-02-06 13:06:56,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940228789] [2025-02-06 13:06:56,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:06:56,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:06:56,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:56,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:06:56,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:06:56,687 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2025-02-06 13:06:56,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 174 transitions, 1994 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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 13:06:56,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:56,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2025-02-06 13:06:56,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:57,058 INFO L124 PetriNetUnfolderBase]: 1948/3555 cut-off events. [2025-02-06 13:06:57,059 INFO L125 PetriNetUnfolderBase]: For 27257/27432 co-relation queries the response was YES. [2025-02-06 13:06:57,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19375 conditions, 3555 events. 1948/3555 cut-off events. For 27257/27432 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22867 event pairs, 206 based on Foata normal form. 105/3641 useless extension candidates. Maximal degree in co-relation 16271. Up to 2121 conditions per place. [2025-02-06 13:06:57,076 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 212 selfloop transitions, 12 changer transitions 1/275 dead transitions. [2025-02-06 13:06:57,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 275 transitions, 3650 flow [2025-02-06 13:06:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:06:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:06:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2025-02-06 13:06:57,076 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3592592592592593 [2025-02-06 13:06:57,076 INFO L175 Difference]: Start difference. First operand has 133 places, 174 transitions, 1994 flow. Second operand 5 states and 97 transitions. [2025-02-06 13:06:57,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 275 transitions, 3650 flow [2025-02-06 13:06:57,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 275 transitions, 3646 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 13:06:57,129 INFO L231 Difference]: Finished difference. Result has 138 places, 180 transitions, 2083 flow [2025-02-06 13:06:57,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2083, PETRI_PLACES=138, PETRI_TRANSITIONS=180} [2025-02-06 13:06:57,130 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2025-02-06 13:06:57,130 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 180 transitions, 2083 flow [2025-02-06 13:06:57,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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 13:06:57,130 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:57,130 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:57,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:57,330 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,SelfDestructingSolverStorable25 [2025-02-06 13:06:57,331 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:57,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:57,331 INFO L85 PathProgramCache]: Analyzing trace with hash 487066503, now seen corresponding path program 3 times [2025-02-06 13:06:57,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:57,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579207220] [2025-02-06 13:06:57,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:57,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:57,338 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:06:57,366 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:06:57,366 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:57,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:57,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:57,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579207220] [2025-02-06 13:06:57,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579207220] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:57,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019191978] [2025-02-06 13:06:57,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:06:57,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:57,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:57,472 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 13:06:57,477 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 13:06:57,530 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:06:57,551 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:06:57,551 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:06:57,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:57,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:06:57,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:57,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:57,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019191978] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:57,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:57,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-02-06 13:06:57,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984591442] [2025-02-06 13:06:57,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:57,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:06:57,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:57,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:06:57,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:06:57,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:57,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 180 transitions, 2083 flow. Second operand has 15 states, 15 states have (on average 11.533333333333333) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:57,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:57,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:57,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:06:58,635 INFO L124 PetriNetUnfolderBase]: 3520/5892 cut-off events. [2025-02-06 13:06:58,636 INFO L125 PetriNetUnfolderBase]: For 41826/41826 co-relation queries the response was YES. [2025-02-06 13:06:58,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32999 conditions, 5892 events. 3520/5892 cut-off events. For 41826/41826 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 36031 event pairs, 130 based on Foata normal form. 170/6062 useless extension candidates. Maximal degree in co-relation 29264. Up to 1067 conditions per place. [2025-02-06 13:06:58,678 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 302 selfloop transitions, 144 changer transitions 7/454 dead transitions. [2025-02-06 13:06:58,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 454 transitions, 5392 flow [2025-02-06 13:06:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-06 13:06:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-02-06 13:06:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 434 transitions. [2025-02-06 13:06:58,680 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2771392081736909 [2025-02-06 13:06:58,680 INFO L175 Difference]: Start difference. First operand has 138 places, 180 transitions, 2083 flow. Second operand 29 states and 434 transitions. [2025-02-06 13:06:58,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 454 transitions, 5392 flow [2025-02-06 13:06:58,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 454 transitions, 5351 flow, removed 10 selfloop flow, removed 2 redundant places. [2025-02-06 13:06:58,787 INFO L231 Difference]: Finished difference. Result has 181 places, 238 transitions, 3297 flow [2025-02-06 13:06:58,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3297, PETRI_PLACES=181, PETRI_TRANSITIONS=238} [2025-02-06 13:06:58,787 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2025-02-06 13:06:58,787 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 238 transitions, 3297 flow [2025-02-06 13:06:58,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.533333333333333) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:06:58,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:06:58,788 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:06:58,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 13:06:58,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:58,989 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:06:58,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:06:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash -929022613, now seen corresponding path program 4 times [2025-02-06 13:06:58,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:06:58,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985771001] [2025-02-06 13:06:58,989 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:58,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:06:58,995 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:06:58,998 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-02-06 13:06:58,998 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:06:58,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:59,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:06:59,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985771001] [2025-02-06 13:06:59,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985771001] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:06:59,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156815162] [2025-02-06 13:06:59,035 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:06:59,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:06:59,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:06:59,037 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 13:06:59,046 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 13:06:59,100 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:06:59,116 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-02-06 13:06:59,116 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:06:59,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:06:59,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:06:59,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:06:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:59,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:06:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:06:59,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156815162] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:06:59,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:06:59,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-02-06 13:06:59,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370645922] [2025-02-06 13:06:59,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:06:59,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:06:59,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:06:59,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:06:59,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:06:59,194 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:06:59,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 238 transitions, 3297 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 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 13:06:59,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:06:59,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:06:59,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:00,289 INFO L124 PetriNetUnfolderBase]: 4917/8215 cut-off events. [2025-02-06 13:07:00,289 INFO L125 PetriNetUnfolderBase]: For 102232/102232 co-relation queries the response was YES. [2025-02-06 13:07:00,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53792 conditions, 8215 events. 4917/8215 cut-off events. For 102232/102232 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 52707 event pairs, 235 based on Foata normal form. 57/8272 useless extension candidates. Maximal degree in co-relation 50676. Up to 1589 conditions per place. [2025-02-06 13:07:00,351 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 236 selfloop transitions, 203 changer transitions 6/446 dead transitions. [2025-02-06 13:07:00,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 446 transitions, 6579 flow [2025-02-06 13:07:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 13:07:00,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 13:07:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 229 transitions. [2025-02-06 13:07:00,352 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28271604938271605 [2025-02-06 13:07:00,353 INFO L175 Difference]: Start difference. First operand has 181 places, 238 transitions, 3297 flow. Second operand 15 states and 229 transitions. [2025-02-06 13:07:00,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 446 transitions, 6579 flow [2025-02-06 13:07:00,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 446 transitions, 6220 flow, removed 141 selfloop flow, removed 3 redundant places. [2025-02-06 13:07:00,895 INFO L231 Difference]: Finished difference. Result has 199 places, 317 transitions, 4883 flow [2025-02-06 13:07:00,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3093, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4883, PETRI_PLACES=199, PETRI_TRANSITIONS=317} [2025-02-06 13:07:00,896 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 145 predicate places. [2025-02-06 13:07:00,896 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 317 transitions, 4883 flow [2025-02-06 13:07:00,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 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 13:07:00,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:00,896 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:00,902 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 13:07:01,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-06 13:07:01,097 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:07:01,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash 963233439, now seen corresponding path program 5 times [2025-02-06 13:07:01,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:01,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643087226] [2025-02-06 13:07:01,098 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:07:01,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:01,104 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-06 13:07:01,115 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:01,118 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:07:01,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:01,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:01,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643087226] [2025-02-06 13:07:01,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643087226] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:01,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226271784] [2025-02-06 13:07:01,167 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:07:01,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:01,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:01,169 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 13:07:01,171 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 13:07:01,227 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-02-06 13:07:01,248 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:01,248 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:07:01,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:01,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:07:01,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:01,288 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:01,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226271784] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:01,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:01,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-02-06 13:07:01,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85596177] [2025-02-06 13:07:01,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:01,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:07:01,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:01,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:07:01,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:07:01,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:07:01,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 317 transitions, 4883 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:01,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:01,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:07:01,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:03,103 INFO L124 PetriNetUnfolderBase]: 6569/10941 cut-off events. [2025-02-06 13:07:03,104 INFO L125 PetriNetUnfolderBase]: For 169573/169573 co-relation queries the response was YES. [2025-02-06 13:07:03,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76452 conditions, 10941 events. 6569/10941 cut-off events. For 169573/169573 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 72574 event pairs, 270 based on Foata normal form. 111/11052 useless extension candidates. Maximal degree in co-relation 72344. Up to 2487 conditions per place. [2025-02-06 13:07:03,183 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 259 selfloop transitions, 270 changer transitions 5/535 dead transitions. [2025-02-06 13:07:03,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 535 transitions, 8567 flow [2025-02-06 13:07:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 13:07:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 13:07:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 250 transitions. [2025-02-06 13:07:03,185 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28935185185185186 [2025-02-06 13:07:03,185 INFO L175 Difference]: Start difference. First operand has 199 places, 317 transitions, 4883 flow. Second operand 16 states and 250 transitions. [2025-02-06 13:07:03,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 535 transitions, 8567 flow [2025-02-06 13:07:04,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 535 transitions, 8459 flow, removed 36 selfloop flow, removed 1 redundant places. [2025-02-06 13:07:04,236 INFO L231 Difference]: Finished difference. Result has 223 places, 396 transitions, 7146 flow [2025-02-06 13:07:04,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4799, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7146, PETRI_PLACES=223, PETRI_TRANSITIONS=396} [2025-02-06 13:07:04,238 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 169 predicate places. [2025-02-06 13:07:04,238 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 396 transitions, 7146 flow [2025-02-06 13:07:04,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:04,238 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:04,238 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:04,246 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 13:07:04,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-06 13:07:04,439 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:07:04,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1254391887, now seen corresponding path program 6 times [2025-02-06 13:07:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:04,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965474811] [2025-02-06 13:07:04,440 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:07:04,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:04,449 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:07:04,461 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:04,464 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 13:07:04,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:04,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:04,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965474811] [2025-02-06 13:07:04,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965474811] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:04,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937785804] [2025-02-06 13:07:04,547 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:07:04,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:04,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:04,550 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 13:07:04,550 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 13:07:04,612 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:07:04,632 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:04,632 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 13:07:04,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:04,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:07:04,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:04,677 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:04,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937785804] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:04,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:04,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-02-06 13:07:04,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816324705] [2025-02-06 13:07:04,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:04,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:07:04,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:04,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:07:04,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:07:04,717 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:07:04,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 396 transitions, 7146 flow. Second operand has 12 states, 12 states have (on average 11.75) internal successors, (141), 12 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:04,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:04,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:07:04,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:07,131 INFO L124 PetriNetUnfolderBase]: 7934/13214 cut-off events. [2025-02-06 13:07:07,132 INFO L125 PetriNetUnfolderBase]: For 286013/286013 co-relation queries the response was YES. [2025-02-06 13:07:07,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103337 conditions, 13214 events. 7934/13214 cut-off events. For 286013/286013 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 90110 event pairs, 308 based on Foata normal form. 80/13294 useless extension candidates. Maximal degree in co-relation 99019. Up to 2358 conditions per place. [2025-02-06 13:07:07,298 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 353 selfloop transitions, 343 changer transitions 3/700 dead transitions. [2025-02-06 13:07:07,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 700 transitions, 12411 flow [2025-02-06 13:07:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-06 13:07:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-06 13:07:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 393 transitions. [2025-02-06 13:07:07,300 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2799145299145299 [2025-02-06 13:07:07,300 INFO L175 Difference]: Start difference. First operand has 223 places, 396 transitions, 7146 flow. Second operand 26 states and 393 transitions. [2025-02-06 13:07:07,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 700 transitions, 12411 flow [2025-02-06 13:07:10,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 700 transitions, 12277 flow, removed 28 selfloop flow, removed 3 redundant places. [2025-02-06 13:07:10,212 INFO L231 Difference]: Finished difference. Result has 257 places, 483 transitions, 10047 flow [2025-02-06 13:07:10,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=7014, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10047, PETRI_PLACES=257, PETRI_TRANSITIONS=483} [2025-02-06 13:07:10,213 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 203 predicate places. [2025-02-06 13:07:10,213 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 483 transitions, 10047 flow [2025-02-06 13:07:10,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.75) internal successors, (141), 12 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:10,213 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:10,213 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:10,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 13:07:10,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:10,414 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:07:10,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:10,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1288643797, now seen corresponding path program 7 times [2025-02-06 13:07:10,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:10,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557945538] [2025-02-06 13:07:10,415 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:07:10,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:10,421 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:07:10,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:10,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:10,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:10,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:10,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557945538] [2025-02-06 13:07:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557945538] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:10,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29694888] [2025-02-06 13:07:10,492 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:07:10,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:10,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:10,495 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 13:07:10,497 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 13:07:10,556 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:07:10,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:10,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:07:10,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:10,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:07:10,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:10,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:10,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29694888] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:10,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:10,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-02-06 13:07:10,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754309175] [2025-02-06 13:07:10,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:10,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:07:10,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:10,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:07:10,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:07:10,665 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:07:10,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 483 transitions, 10047 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:10,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:10,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:07:10,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:13,102 INFO L124 PetriNetUnfolderBase]: 7957/13283 cut-off events. [2025-02-06 13:07:13,102 INFO L125 PetriNetUnfolderBase]: For 369665/369665 co-relation queries the response was YES. [2025-02-06 13:07:13,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115373 conditions, 13283 events. 7957/13283 cut-off events. For 369665/369665 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 91457 event pairs, 906 based on Foata normal form. 24/13307 useless extension candidates. Maximal degree in co-relation 110817. Up to 3715 conditions per place. [2025-02-06 13:07:13,300 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 404 selfloop transitions, 221 changer transitions 6/632 dead transitions. [2025-02-06 13:07:13,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 632 transitions, 12899 flow [2025-02-06 13:07:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 13:07:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 13:07:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 213 transitions. [2025-02-06 13:07:13,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3034188034188034 [2025-02-06 13:07:13,302 INFO L175 Difference]: Start difference. First operand has 257 places, 483 transitions, 10047 flow. Second operand 13 states and 213 transitions. [2025-02-06 13:07:13,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 632 transitions, 12899 flow [2025-02-06 13:07:16,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 632 transitions, 12330 flow, removed 215 selfloop flow, removed 10 redundant places. [2025-02-06 13:07:16,870 INFO L231 Difference]: Finished difference. Result has 261 places, 482 transitions, 9920 flow [2025-02-06 13:07:16,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=9478, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9920, PETRI_PLACES=261, PETRI_TRANSITIONS=482} [2025-02-06 13:07:16,871 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 207 predicate places. [2025-02-06 13:07:16,871 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 482 transitions, 9920 flow [2025-02-06 13:07:16,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:16,871 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:16,871 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:16,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 13:07:17,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:17,072 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:07:17,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:17,072 INFO L85 PathProgramCache]: Analyzing trace with hash 49098315, now seen corresponding path program 8 times [2025-02-06 13:07:17,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:17,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192045682] [2025-02-06 13:07:17,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:07:17,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:17,079 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:07:17,084 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:17,085 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:07:17,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:17,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192045682] [2025-02-06 13:07:17,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192045682] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766401076] [2025-02-06 13:07:17,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:07:17,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:17,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:17,142 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 13:07:17,144 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 13:07:17,200 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:07:17,220 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:17,220 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:07:17,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:17,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:07:17,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:17,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:17,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766401076] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:17,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:17,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2025-02-06 13:07:17,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675705710] [2025-02-06 13:07:17,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:17,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:07:17,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:17,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:07:17,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:07:17,305 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:07:17,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 482 transitions, 9920 flow. Second operand has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:17,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:17,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:07:17,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:20,680 INFO L124 PetriNetUnfolderBase]: 9111/15074 cut-off events. [2025-02-06 13:07:20,680 INFO L125 PetriNetUnfolderBase]: For 396518/396518 co-relation queries the response was YES. [2025-02-06 13:07:20,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130557 conditions, 15074 events. 9111/15074 cut-off events. For 396518/396518 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 104128 event pairs, 529 based on Foata normal form. 72/15146 useless extension candidates. Maximal degree in co-relation 129989. Up to 3118 conditions per place. [2025-02-06 13:07:20,898 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 360 selfloop transitions, 423 changer transitions 3/787 dead transitions. [2025-02-06 13:07:20,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 787 transitions, 15595 flow [2025-02-06 13:07:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-06 13:07:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-06 13:07:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 387 transitions. [2025-02-06 13:07:20,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27564102564102566 [2025-02-06 13:07:20,899 INFO L175 Difference]: Start difference. First operand has 261 places, 482 transitions, 9920 flow. Second operand 26 states and 387 transitions. [2025-02-06 13:07:20,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 787 transitions, 15595 flow [2025-02-06 13:07:24,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 787 transitions, 15160 flow, removed 3 selfloop flow, removed 10 redundant places. [2025-02-06 13:07:24,682 INFO L231 Difference]: Finished difference. Result has 286 places, 571 transitions, 13090 flow [2025-02-06 13:07:24,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=9524, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13090, PETRI_PLACES=286, PETRI_TRANSITIONS=571} [2025-02-06 13:07:24,683 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 232 predicate places. [2025-02-06 13:07:24,683 INFO L471 AbstractCegarLoop]: Abstraction has has 286 places, 571 transitions, 13090 flow [2025-02-06 13:07:24,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:24,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:24,683 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:24,689 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 13:07:24,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:24,884 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:07:24,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1294683661, now seen corresponding path program 9 times [2025-02-06 13:07:24,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:24,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540678831] [2025-02-06 13:07:24,885 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:07:24,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:24,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:07:24,896 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:24,898 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:07:24,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:24,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:24,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540678831] [2025-02-06 13:07:24,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540678831] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:24,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670280597] [2025-02-06 13:07:24,943 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:07:24,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:24,945 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 13:07:24,946 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 13:07:25,011 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:07:25,030 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:25,031 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:07:25,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:25,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:07:25,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:25,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:25,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670280597] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:25,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:25,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-02-06 13:07:25,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995869079] [2025-02-06 13:07:25,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:25,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:07:25,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:25,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:07:25,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:07:25,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:07:25,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 571 transitions, 13090 flow. Second operand has 15 states, 15 states have (on average 10.866666666666667) internal successors, (163), 15 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:25,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:25,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:07:25,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:28,583 INFO L124 PetriNetUnfolderBase]: 9872/16257 cut-off events. [2025-02-06 13:07:28,584 INFO L125 PetriNetUnfolderBase]: For 543046/543046 co-relation queries the response was YES. [2025-02-06 13:07:28,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153896 conditions, 16257 events. 9872/16257 cut-off events. For 543046/543046 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 113386 event pairs, 1031 based on Foata normal form. 32/16289 useless extension candidates. Maximal degree in co-relation 152037. Up to 4370 conditions per place. [2025-02-06 13:07:28,823 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 474 selfloop transitions, 272 changer transitions 16/763 dead transitions. [2025-02-06 13:07:28,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 763 transitions, 17121 flow [2025-02-06 13:07:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 13:07:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 13:07:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 247 transitions. [2025-02-06 13:07:28,825 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28587962962962965 [2025-02-06 13:07:28,825 INFO L175 Difference]: Start difference. First operand has 286 places, 571 transitions, 13090 flow. Second operand 16 states and 247 transitions. [2025-02-06 13:07:28,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 763 transitions, 17121 flow [2025-02-06 13:07:35,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 763 transitions, 16532 flow, removed 202 selfloop flow, removed 10 redundant places. [2025-02-06 13:07:35,755 INFO L231 Difference]: Finished difference. Result has 297 places, 588 transitions, 13766 flow [2025-02-06 13:07:35,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=12636, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13766, PETRI_PLACES=297, PETRI_TRANSITIONS=588} [2025-02-06 13:07:35,756 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 243 predicate places. [2025-02-06 13:07:35,756 INFO L471 AbstractCegarLoop]: Abstraction has has 297 places, 588 transitions, 13766 flow [2025-02-06 13:07:35,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.866666666666667) internal successors, (163), 15 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:35,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:35,757 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:35,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-06 13:07:35,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:35,958 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:07:35,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:35,958 INFO L85 PathProgramCache]: Analyzing trace with hash 487156862, now seen corresponding path program 10 times [2025-02-06 13:07:35,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:35,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343432725] [2025-02-06 13:07:35,959 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:07:35,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:35,964 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:07:35,967 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-02-06 13:07:35,968 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:07:35,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:36,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343432725] [2025-02-06 13:07:36,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343432725] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633212525] [2025-02-06 13:07:36,008 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:07:36,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:36,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:36,014 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 13:07:36,020 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 13:07:36,081 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:07:36,093 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-02-06 13:07:36,094 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 13:07:36,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:36,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:07:36,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:36,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:36,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633212525] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:36,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:36,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-02-06 13:07:36,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259005172] [2025-02-06 13:07:36,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:36,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:07:36,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:36,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:07:36,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:07:36,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:07:36,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 588 transitions, 13766 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:36,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:36,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:07:36,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:40,049 INFO L124 PetriNetUnfolderBase]: 11107/18282 cut-off events. [2025-02-06 13:07:40,050 INFO L125 PetriNetUnfolderBase]: For 643397/643397 co-relation queries the response was YES. [2025-02-06 13:07:40,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174597 conditions, 18282 events. 11107/18282 cut-off events. For 643397/643397 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 130103 event pairs, 1998 based on Foata normal form. 330/18612 useless extension candidates. Maximal degree in co-relation 173719. Up to 8167 conditions per place. [2025-02-06 13:07:40,288 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 675 selfloop transitions, 194 changer transitions 0/870 dead transitions. [2025-02-06 13:07:40,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 870 transitions, 20205 flow [2025-02-06 13:07:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-06 13:07:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-06 13:07:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 310 transitions. [2025-02-06 13:07:40,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28703703703703703 [2025-02-06 13:07:40,292 INFO L175 Difference]: Start difference. First operand has 297 places, 588 transitions, 13766 flow. Second operand 20 states and 310 transitions. [2025-02-06 13:07:40,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 870 transitions, 20205 flow [2025-02-06 13:07:46,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 870 transitions, 19867 flow, removed 20 selfloop flow, removed 8 redundant places. [2025-02-06 13:07:46,502 INFO L231 Difference]: Finished difference. Result has 317 places, 645 transitions, 15812 flow [2025-02-06 13:07:46,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=13342, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15812, PETRI_PLACES=317, PETRI_TRANSITIONS=645} [2025-02-06 13:07:46,502 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 263 predicate places. [2025-02-06 13:07:46,503 INFO L471 AbstractCegarLoop]: Abstraction has has 317 places, 645 transitions, 15812 flow [2025-02-06 13:07:46,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:46,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:07:46,503 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:07:46,509 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 13:07:46,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:46,707 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:07:46,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:07:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1559690143, now seen corresponding path program 11 times [2025-02-06 13:07:46,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:07:46,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451410336] [2025-02-06 13:07:46,708 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:07:46,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:07:46,716 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:07:46,731 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:46,732 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:07:46,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:46,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:07:46,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451410336] [2025-02-06 13:07:46,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451410336] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:07:46,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636550306] [2025-02-06 13:07:46,801 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:07:46,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:07:46,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:07:46,806 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 13:07:46,807 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 13:07:46,865 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:07:46,884 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:07:46,884 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:07:46,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:07:46,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:07:46,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:07:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:46,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:07:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:07:46,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636550306] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:07:46,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:07:46,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-02-06 13:07:46,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251915004] [2025-02-06 13:07:46,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:07:46,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:07:46,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:07:46,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:07:46,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:07:46,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:07:46,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 645 transitions, 15812 flow. Second operand has 15 states, 15 states have (on average 11.333333333333334) internal successors, (170), 15 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:07:46,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:07:46,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:07:46,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:07:51,347 INFO L124 PetriNetUnfolderBase]: 12134/19906 cut-off events. [2025-02-06 13:07:51,347 INFO L125 PetriNetUnfolderBase]: For 807996/807996 co-relation queries the response was YES. [2025-02-06 13:07:51,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200989 conditions, 19906 events. 12134/19906 cut-off events. For 807996/807996 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 142978 event pairs, 1785 based on Foata normal form. 170/20076 useless extension candidates. Maximal degree in co-relation 198772. Up to 9207 conditions per place. [2025-02-06 13:07:51,711 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 538 selfloop transitions, 312 changer transitions 4/855 dead transitions. [2025-02-06 13:07:51,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 855 transitions, 20740 flow [2025-02-06 13:07:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-06 13:07:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-06 13:07:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 313 transitions. [2025-02-06 13:07:51,712 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2898148148148148 [2025-02-06 13:07:51,713 INFO L175 Difference]: Start difference. First operand has 317 places, 645 transitions, 15812 flow. Second operand 20 states and 313 transitions. [2025-02-06 13:07:51,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 855 transitions, 20740 flow [2025-02-06 13:08:02,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 855 transitions, 20122 flow, removed 261 selfloop flow, removed 8 redundant places. [2025-02-06 13:08:02,646 INFO L231 Difference]: Finished difference. Result has 340 places, 683 transitions, 17673 flow [2025-02-06 13:08:02,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=15196, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=17673, PETRI_PLACES=340, PETRI_TRANSITIONS=683} [2025-02-06 13:08:02,648 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 286 predicate places. [2025-02-06 13:08:02,648 INFO L471 AbstractCegarLoop]: Abstraction has has 340 places, 683 transitions, 17673 flow [2025-02-06 13:08:02,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.333333333333334) internal successors, (170), 15 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:02,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:02,648 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:02,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-06 13:08:02,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:02,849 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:08:02,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash 322943166, now seen corresponding path program 12 times [2025-02-06 13:08:02,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:02,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869359216] [2025-02-06 13:08:02,850 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:08:02,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:02,857 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-02-06 13:08:02,860 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-02-06 13:08:02,860 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-02-06 13:08:02,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:02,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:02,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869359216] [2025-02-06 13:08:02,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869359216] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:02,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:02,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 13:08:02,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909793151] [2025-02-06 13:08:02,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:02,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:08:02,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:02,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:08:02,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:08:02,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:08:02,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 683 transitions, 17673 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 13:08:02,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:02,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:08:02,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:07,795 INFO L124 PetriNetUnfolderBase]: 12395/20333 cut-off events. [2025-02-06 13:08:07,796 INFO L125 PetriNetUnfolderBase]: For 912109/912109 co-relation queries the response was YES. [2025-02-06 13:08:08,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213919 conditions, 20333 events. 12395/20333 cut-off events. For 912109/912109 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 146812 event pairs, 2124 based on Foata normal form. 54/20387 useless extension candidates. Maximal degree in co-relation 212070. Up to 8891 conditions per place. [2025-02-06 13:08:08,483 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 603 selfloop transitions, 230 changer transitions 0/834 dead transitions. [2025-02-06 13:08:08,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 834 transitions, 22227 flow [2025-02-06 13:08:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:08:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:08:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2025-02-06 13:08:08,484 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28619528619528617 [2025-02-06 13:08:08,484 INFO L175 Difference]: Start difference. First operand has 340 places, 683 transitions, 17673 flow. Second operand 11 states and 170 transitions. [2025-02-06 13:08:08,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 834 transitions, 22227 flow [2025-02-06 13:08:19,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 834 transitions, 21739 flow, removed 199 selfloop flow, removed 4 redundant places. [2025-02-06 13:08:19,982 INFO L231 Difference]: Finished difference. Result has 351 places, 708 transitions, 18497 flow [2025-02-06 13:08:19,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=17213, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18497, PETRI_PLACES=351, PETRI_TRANSITIONS=708} [2025-02-06 13:08:19,983 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 297 predicate places. [2025-02-06 13:08:19,983 INFO L471 AbstractCegarLoop]: Abstraction has has 351 places, 708 transitions, 18497 flow [2025-02-06 13:08:19,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 13:08:19,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:19,984 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:19,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-02-06 13:08:19,984 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2025-02-06 13:08:19,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:19,985 INFO L85 PathProgramCache]: Analyzing trace with hash 148680954, now seen corresponding path program 13 times [2025-02-06 13:08:19,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:19,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269489500] [2025-02-06 13:08:19,985 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:08:19,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:19,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:08:20,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:08:20,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:20,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:20,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:20,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269489500] [2025-02-06 13:08:20,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269489500] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:20,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537790492] [2025-02-06 13:08:20,065 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 13:08:20,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:20,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:20,070 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 13:08:20,071 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 13:08:20,141 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-06 13:08:20,162 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-06 13:08:20,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:20,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:20,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:08:20,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:20,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:20,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537790492] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:20,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:20,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-02-06 13:08:20,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151292787] [2025-02-06 13:08:20,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:20,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:08:20,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:20,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:08:20,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:08:20,236 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2025-02-06 13:08:20,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 708 transitions, 18497 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 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 13:08:20,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:20,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2025-02-06 13:08:20,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand