./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/bigshot_s.i --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/pthread/bigshot_s.i -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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:31:41,258 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:31:41,328 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:31:41,333 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:31:41,333 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:31:41,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:31:41,353 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:31:41,353 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:31:41,354 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:31:41,354 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:31:41,354 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:31:41,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:31:41,354 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:31:41,354 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:31:41,355 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:31:41,355 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:31:41,355 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:31:41,355 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:31:41,355 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:31:41,355 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:31:41,356 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:31:41,356 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:31:41,356 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:31:41,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:31:41,356 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:31:41,356 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:31:41,356 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:31:41,356 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:31:41,357 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:31:41,357 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:31:41,357 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:31:41,357 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:31:41,357 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:31:41,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:31:41,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:31:41,357 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:31:41,358 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:31:41,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:31:41,358 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:31:41,358 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:31:41,358 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:31:41,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:31:41,358 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 -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2025-02-06 12:31:41,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:31:41,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:31:41,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:31:41,688 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:31:41,689 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:31:41,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s.i [2025-02-06 12:31:43,062 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/01c181a90/193bed916ea142b4985b5e601babe54a/FLAG2a25ca133 [2025-02-06 12:31:43,366 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:31:43,367 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2025-02-06 12:31:43,390 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/01c181a90/193bed916ea142b4985b5e601babe54a/FLAG2a25ca133 [2025-02-06 12:31:43,402 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/01c181a90/193bed916ea142b4985b5e601babe54a [2025-02-06 12:31:43,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:31:43,405 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:31:43,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:31:43,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:31:43,409 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:31:43,409 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:31:43" (1/1) ... [2025-02-06 12:31:43,410 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0f518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:43, skipping insertion in model container [2025-02-06 12:31:43,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:31:43" (1/1) ... [2025-02-06 12:31:43,453 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:31:43,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:31:43,940 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:31:44,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:31:44,077 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:31:44,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44 WrapperNode [2025-02-06 12:31:44,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:31:44,080 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:31:44,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:31:44,081 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:31:44,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,122 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2025-02-06 12:31:44,123 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:31:44,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:31:44,123 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:31:44,123 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:31:44,132 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,142 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,155 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2025-02-06 12:31:44,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,169 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,173 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:31:44,184 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:31:44,184 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:31:44,184 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:31:44,185 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (1/1) ... [2025-02-06 12:31:44,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:31:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:44,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 12:31:44,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 12:31:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-02-06 12:31:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-02-06 12:31:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-02-06 12:31:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 12:31:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 12:31:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 12:31:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 12:31:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 12:31:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 12:31:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 12:31:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 12:31:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:31:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 12:31:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 12:31:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 12:31:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:31:44,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:31:44,309 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:31:44,430 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:31:44,431 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:31:44,612 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:31:44,612 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:31:44,728 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:31:44,728 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:31:44,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:31:44 BoogieIcfgContainer [2025-02-06 12:31:44,729 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:31:44,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:31:44,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:31:44,737 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:31:44,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:31:43" (1/3) ... [2025-02-06 12:31:44,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6353629a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:31:44, skipping insertion in model container [2025-02-06 12:31:44,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:31:44" (2/3) ... [2025-02-06 12:31:44,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6353629a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:31:44, skipping insertion in model container [2025-02-06 12:31:44,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:31:44" (3/3) ... [2025-02-06 12:31:44,740 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2025-02-06 12:31:44,752 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:31:44,754 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s.i that has 3 procedures, 43 locations, 1 initial locations, 1 loop locations, and 10 error locations. [2025-02-06 12:31:44,754 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:31:44,803 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 12:31:44,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2025-02-06 12:31:44,881 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2025-02-06 12:31:44,883 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:31:44,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 80 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2025-02-06 12:31:44,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2025-02-06 12:31:44,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2025-02-06 12:31:44,898 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:31:44,907 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;@7cda4961, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:31:44,907 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-02-06 12:31:44,913 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:31:44,914 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2025-02-06 12:31:44,914 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:31:44,915 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:44,915 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:44,917 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:44,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:44,922 INFO L85 PathProgramCache]: Analyzing trace with hash 191173536, now seen corresponding path program 1 times [2025-02-06 12:31:44,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:44,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841165587] [2025-02-06 12:31:44,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:44,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:45,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:31:45,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:31:45,048 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:45,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:45,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:45,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841165587] [2025-02-06 12:31:45,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841165587] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:45,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:45,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:31:45,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782006872] [2025-02-06 12:31:45,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:45,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:31:45,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:45,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:31:45,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:31:45,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:31:45,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:45,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:45,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:31:45,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:45,537 INFO L124 PetriNetUnfolderBase]: 10/61 cut-off events. [2025-02-06 12:31:45,537 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:31:45,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 61 events. 10/61 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 157 event pairs, 2 based on Foata normal form. 4/56 useless extension candidates. Maximal degree in co-relation 82. Up to 21 conditions per place. [2025-02-06 12:31:45,539 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 17 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2025-02-06 12:31:45,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 132 flow [2025-02-06 12:31:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:31:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:31:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2025-02-06 12:31:45,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2025-02-06 12:31:45,556 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 4 states and 113 transitions. [2025-02-06 12:31:45,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 132 flow [2025-02-06 12:31:45,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:31:45,562 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 88 flow [2025-02-06 12:31:45,564 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2025-02-06 12:31:45,567 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-06 12:31:45,568 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 88 flow [2025-02-06 12:31:45,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:45,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:45,568 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:45,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 12:31:45,568 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:45,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1631412504, now seen corresponding path program 1 times [2025-02-06 12:31:45,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:45,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149743890] [2025-02-06 12:31:45,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:45,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:45,582 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 12:31:45,590 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 12:31:45,590 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:45,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:45,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:45,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149743890] [2025-02-06 12:31:45,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149743890] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:45,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:45,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:31:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531043183] [2025-02-06 12:31:45,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:45,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:31:45,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:45,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:31:45,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:31:45,826 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2025-02-06 12:31:45,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:31:45,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:45,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2025-02-06 12:31:45,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:45,913 INFO L124 PetriNetUnfolderBase]: 15/78 cut-off events. [2025-02-06 12:31:45,915 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-06 12:31:45,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 78 events. 15/78 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 190 event pairs, 6 based on Foata normal form. 2/66 useless extension candidates. Maximal degree in co-relation 48. Up to 37 conditions per place. [2025-02-06 12:31:45,916 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 20 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2025-02-06 12:31:45,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 146 flow [2025-02-06 12:31:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:31:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:31:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2025-02-06 12:31:45,919 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2025-02-06 12:31:45,920 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 88 flow. Second operand 4 states and 118 transitions. [2025-02-06 12:31:45,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 146 flow [2025-02-06 12:31:45,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 138 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:31:45,924 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 105 flow [2025-02-06 12:31:45,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2025-02-06 12:31:45,925 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2025-02-06 12:31:45,925 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 105 flow [2025-02-06 12:31:45,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:31:45,926 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:45,926 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:45,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 12:31:45,926 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:45,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash -965819742, now seen corresponding path program 1 times [2025-02-06 12:31:45,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:45,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391490530] [2025-02-06 12:31:45,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:45,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:45,940 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 12:31:45,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 12:31:45,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:45,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:46,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:46,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391490530] [2025-02-06 12:31:46,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391490530] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:46,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:46,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:31:46,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28942558] [2025-02-06 12:31:46,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:46,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:31:46,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:46,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:31:46,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:31:46,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:31:46,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:46,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:46,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:31:46,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:46,160 INFO L124 PetriNetUnfolderBase]: 15/81 cut-off events. [2025-02-06 12:31:46,160 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-06 12:31:46,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 81 events. 15/81 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 181 event pairs, 1 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 20 conditions per place. [2025-02-06 12:31:46,162 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 19 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2025-02-06 12:31:46,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 151 flow [2025-02-06 12:31:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:31:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:31:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2025-02-06 12:31:46,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.578125 [2025-02-06 12:31:46,166 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 105 flow. Second operand 4 states and 111 transitions. [2025-02-06 12:31:46,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 151 flow [2025-02-06 12:31:46,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:31:46,168 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 104 flow [2025-02-06 12:31:46,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2025-02-06 12:31:46,168 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-06 12:31:46,170 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 104 flow [2025-02-06 12:31:46,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:46,170 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:46,171 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:46,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 12:31:46,171 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:46,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash 124359258, now seen corresponding path program 1 times [2025-02-06 12:31:46,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:46,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078884757] [2025-02-06 12:31:46,173 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:46,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:46,181 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 12:31:46,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 12:31:46,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:46,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:46,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:46,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078884757] [2025-02-06 12:31:46,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078884757] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:46,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:46,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:31:46,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471041796] [2025-02-06 12:31:46,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:46,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:31:46,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:46,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:31:46,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:31:46,343 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2025-02-06 12:31:46,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:31:46,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:46,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2025-02-06 12:31:46,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:46,418 INFO L124 PetriNetUnfolderBase]: 14/69 cut-off events. [2025-02-06 12:31:46,418 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-02-06 12:31:46,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 69 events. 14/69 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 137 event pairs, 4 based on Foata normal form. 2/66 useless extension candidates. Maximal degree in co-relation 49. Up to 31 conditions per place. [2025-02-06 12:31:46,419 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 20 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2025-02-06 12:31:46,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 156 flow [2025-02-06 12:31:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:31:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:31:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2025-02-06 12:31:46,421 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2025-02-06 12:31:46,421 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 104 flow. Second operand 4 states and 118 transitions. [2025-02-06 12:31:46,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 156 flow [2025-02-06 12:31:46,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 148 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:31:46,422 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 107 flow [2025-02-06 12:31:46,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2025-02-06 12:31:46,423 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-06 12:31:46,423 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 107 flow [2025-02-06 12:31:46,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:31:46,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:46,424 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:46,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 12:31:46,424 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:46,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:46,425 INFO L85 PathProgramCache]: Analyzing trace with hash 889005918, now seen corresponding path program 1 times [2025-02-06 12:31:46,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:46,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981225790] [2025-02-06 12:31:46,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:46,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:46,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 12:31:46,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 12:31:46,441 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:46,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:46,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:46,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981225790] [2025-02-06 12:31:46,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981225790] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:46,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:46,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:31:46,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134708272] [2025-02-06 12:31:46,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:46,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:31:46,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:46,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:31:46,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:31:46,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:31:46,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:46,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:46,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:31:46,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:46,531 INFO L124 PetriNetUnfolderBase]: 12/69 cut-off events. [2025-02-06 12:31:46,532 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-02-06 12:31:46,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 69 events. 12/69 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 135 event pairs, 6 based on Foata normal form. 2/68 useless extension candidates. Maximal degree in co-relation 45. Up to 34 conditions per place. [2025-02-06 12:31:46,532 INFO L140 encePairwiseOnDemand]: 46/48 looper letters, 20 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2025-02-06 12:31:46,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 149 flow [2025-02-06 12:31:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:31:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:31:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2025-02-06 12:31:46,537 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2025-02-06 12:31:46,538 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 107 flow. Second operand 3 states and 92 transitions. [2025-02-06 12:31:46,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 149 flow [2025-02-06 12:31:46,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 141 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:31:46,539 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 99 flow [2025-02-06 12:31:46,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2025-02-06 12:31:46,540 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2025-02-06 12:31:46,540 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 99 flow [2025-02-06 12:31:46,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:46,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:46,540 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:46,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 12:31:46,540 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:46,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash -96314054, now seen corresponding path program 1 times [2025-02-06 12:31:46,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:46,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476327637] [2025-02-06 12:31:46,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:46,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:46,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 12:31:46,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:31:46,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:46,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:46,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:46,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476327637] [2025-02-06 12:31:46,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476327637] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:46,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128707807] [2025-02-06 12:31:46,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:46,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:46,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:46,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:46,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 12:31:46,800 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 12:31:46,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:31:46,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:46,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:46,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 12:31:46,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:46,888 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:31:46,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:31:46,896 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 14 treesize of output 9 [2025-02-06 12:31:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:47,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:47,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128707807] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:47,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:47,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2025-02-06 12:31:47,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093622866] [2025-02-06 12:31:47,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:47,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 12:31:47,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:47,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 12:31:47,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-02-06 12:31:47,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-06 12:31:47,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 99 flow. Second operand has 13 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:47,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:47,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-06 12:31:47,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:47,811 INFO L124 PetriNetUnfolderBase]: 31/133 cut-off events. [2025-02-06 12:31:47,812 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-02-06 12:31:47,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 133 events. 31/133 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 237 event pairs, 6 based on Foata normal form. 12/143 useless extension candidates. Maximal degree in co-relation 238. Up to 36 conditions per place. [2025-02-06 12:31:47,813 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 31 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2025-02-06 12:31:47,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 225 flow [2025-02-06 12:31:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:31:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:31:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2025-02-06 12:31:47,814 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2025-02-06 12:31:47,814 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 99 flow. Second operand 7 states and 181 transitions. [2025-02-06 12:31:47,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 225 flow [2025-02-06 12:31:47,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:31:47,816 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 160 flow [2025-02-06 12:31:47,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=160, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2025-02-06 12:31:47,817 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2025-02-06 12:31:47,817 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 160 flow [2025-02-06 12:31:47,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:47,817 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:47,817 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:47,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 12:31:48,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:48,022 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:48,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1931480572, now seen corresponding path program 1 times [2025-02-06 12:31:48,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:48,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323362904] [2025-02-06 12:31:48,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:48,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:48,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 12:31:48,036 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 12:31:48,037 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:48,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:48,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:48,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323362904] [2025-02-06 12:31:48,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323362904] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:48,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326030366] [2025-02-06 12:31:48,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:48,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:48,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:48,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:48,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 12:31:48,236 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 12:31:48,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 12:31:48,255 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:48,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:48,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 12:31:48,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:48,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 12:31:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:48,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:48,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326030366] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:48,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:48,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-06 12:31:48,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771025380] [2025-02-06 12:31:48,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:48,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 12:31:48,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:48,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 12:31:48,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-02-06 12:31:48,687 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:31:48,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 160 flow. Second operand has 11 states, 11 states have (on average 24.727272727272727) internal successors, (272), 11 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:48,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:48,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:31:48,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:48,878 INFO L124 PetriNetUnfolderBase]: 26/124 cut-off events. [2025-02-06 12:31:48,879 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-02-06 12:31:48,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 124 events. 26/124 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 199 event pairs, 4 based on Foata normal form. 6/127 useless extension candidates. Maximal degree in co-relation 254. Up to 30 conditions per place. [2025-02-06 12:31:48,880 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 27 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2025-02-06 12:31:48,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 53 transitions, 260 flow [2025-02-06 12:31:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:31:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:31:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2025-02-06 12:31:48,881 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2025-02-06 12:31:48,882 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 160 flow. Second operand 7 states and 195 transitions. [2025-02-06 12:31:48,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 53 transitions, 260 flow [2025-02-06 12:31:48,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 244 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-02-06 12:31:48,884 INFO L231 Difference]: Finished difference. Result has 57 places, 42 transitions, 194 flow [2025-02-06 12:31:48,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=194, PETRI_PLACES=57, PETRI_TRANSITIONS=42} [2025-02-06 12:31:48,885 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2025-02-06 12:31:48,885 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 194 flow [2025-02-06 12:31:48,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 24.727272727272727) internal successors, (272), 11 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:48,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:48,885 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:48,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 12:31:49,086 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 12:31:49,086 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:49,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:49,087 INFO L85 PathProgramCache]: Analyzing trace with hash -382824427, now seen corresponding path program 1 times [2025-02-06 12:31:49,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:49,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222575712] [2025-02-06 12:31:49,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:49,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:49,098 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-06 12:31:49,103 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 12:31:49,104 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:49,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:49,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:49,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222575712] [2025-02-06 12:31:49,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222575712] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:49,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:49,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:31:49,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746815062] [2025-02-06 12:31:49,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:49,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:31:49,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:49,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:31:49,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:31:49,162 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-06 12:31:49,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:31:49,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:49,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-06 12:31:49,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:49,228 INFO L124 PetriNetUnfolderBase]: 20/117 cut-off events. [2025-02-06 12:31:49,228 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2025-02-06 12:31:49,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 117 events. 20/117 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 191 event pairs, 11 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 272. Up to 51 conditions per place. [2025-02-06 12:31:49,231 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 24 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2025-02-06 12:31:49,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 42 transitions, 248 flow [2025-02-06 12:31:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:31:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:31:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2025-02-06 12:31:49,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2025-02-06 12:31:49,233 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 194 flow. Second operand 4 states and 106 transitions. [2025-02-06 12:31:49,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 42 transitions, 248 flow [2025-02-06 12:31:49,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 42 transitions, 234 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 12:31:49,238 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 184 flow [2025-02-06 12:31:49,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2025-02-06 12:31:49,239 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2025-02-06 12:31:49,240 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 184 flow [2025-02-06 12:31:49,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:31:49,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:49,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:49,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 12:31:49,241 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:49,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:49,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1019589776, now seen corresponding path program 1 times [2025-02-06 12:31:49,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:49,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483119855] [2025-02-06 12:31:49,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:49,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:49,251 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 12:31:49,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 12:31:49,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:49,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:49,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:49,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483119855] [2025-02-06 12:31:49,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483119855] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:49,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:49,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 12:31:49,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610262557] [2025-02-06 12:31:49,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:49,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 12:31:49,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:49,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 12:31:49,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-06 12:31:49,637 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-06 12:31:49,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 184 flow. Second operand has 9 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:49,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:49,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-06 12:31:49,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:49,857 INFO L124 PetriNetUnfolderBase]: 24/139 cut-off events. [2025-02-06 12:31:49,857 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2025-02-06 12:31:49,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 139 events. 24/139 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 271 event pairs, 12 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 313. Up to 53 conditions per place. [2025-02-06 12:31:49,859 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 31 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2025-02-06 12:31:49,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 56 transitions, 305 flow [2025-02-06 12:31:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 12:31:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 12:31:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2025-02-06 12:31:49,863 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2025-02-06 12:31:49,863 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 184 flow. Second operand 12 states and 268 transitions. [2025-02-06 12:31:49,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 56 transitions, 305 flow [2025-02-06 12:31:49,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 56 transitions, 295 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:31:49,866 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 242 flow [2025-02-06 12:31:49,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=242, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2025-02-06 12:31:49,867 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2025-02-06 12:31:49,867 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 242 flow [2025-02-06 12:31:49,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:49,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:49,867 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:49,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 12:31:49,868 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:49,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1502369778, now seen corresponding path program 1 times [2025-02-06 12:31:49,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:49,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719638374] [2025-02-06 12:31:49,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:49,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 12:31:49,883 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 12:31:49,883 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:49,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:50,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:50,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719638374] [2025-02-06 12:31:50,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719638374] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:31:50,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:31:50,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:31:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581662072] [2025-02-06 12:31:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:31:50,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:31:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:50,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:31:50,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:31:50,109 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:31:50,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 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 12:31:50,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:50,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:31:50,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:50,196 INFO L124 PetriNetUnfolderBase]: 21/122 cut-off events. [2025-02-06 12:31:50,196 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2025-02-06 12:31:50,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 122 events. 21/122 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 196 event pairs, 12 based on Foata normal form. 2/124 useless extension candidates. Maximal degree in co-relation 310. Up to 52 conditions per place. [2025-02-06 12:31:50,198 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2025-02-06 12:31:50,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 45 transitions, 271 flow [2025-02-06 12:31:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:31:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:31:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2025-02-06 12:31:50,199 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2025-02-06 12:31:50,199 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 242 flow. Second operand 6 states and 170 transitions. [2025-02-06 12:31:50,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 45 transitions, 271 flow [2025-02-06 12:31:50,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 45 transitions, 254 flow, removed 2 selfloop flow, removed 7 redundant places. [2025-02-06 12:31:50,202 INFO L231 Difference]: Finished difference. Result has 62 places, 42 transitions, 200 flow [2025-02-06 12:31:50,202 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=62, PETRI_TRANSITIONS=42} [2025-02-06 12:31:50,202 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2025-02-06 12:31:50,202 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 42 transitions, 200 flow [2025-02-06 12:31:50,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 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 12:31:50,203 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:50,203 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:50,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 12:31:50,203 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:50,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:50,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1224027010, now seen corresponding path program 1 times [2025-02-06 12:31:50,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:50,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607698367] [2025-02-06 12:31:50,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:50,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:50,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-06 12:31:50,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 12:31:50,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:50,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:50,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:50,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607698367] [2025-02-06 12:31:50,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607698367] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:50,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865043117] [2025-02-06 12:31:50,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:31:50,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:50,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:50,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:50,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 12:31:50,447 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-06 12:31:50,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 12:31:50,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:31:50,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:50,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-06 12:31:50,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:50,618 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 15 treesize of output 7 [2025-02-06 12:31:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:50,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:50,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865043117] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:50,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:50,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-02-06 12:31:50,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568400976] [2025-02-06 12:31:50,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:50,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 12:31:50,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:50,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 12:31:50,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-06 12:31:50,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:31:50,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 42 transitions, 200 flow. Second operand has 14 states, 14 states have (on average 27.214285714285715) internal successors, (381), 14 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:50,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:50,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:31:50,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:51,025 INFO L124 PetriNetUnfolderBase]: 18/117 cut-off events. [2025-02-06 12:31:51,025 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2025-02-06 12:31:51,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 117 events. 18/117 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 191 event pairs, 9 based on Foata normal form. 2/119 useless extension candidates. Maximal degree in co-relation 274. Up to 41 conditions per place. [2025-02-06 12:31:51,026 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2025-02-06 12:31:51,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 46 transitions, 263 flow [2025-02-06 12:31:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:31:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:31:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2025-02-06 12:31:51,028 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2025-02-06 12:31:51,028 INFO L175 Difference]: Start difference. First operand has 62 places, 42 transitions, 200 flow. Second operand 7 states and 197 transitions. [2025-02-06 12:31:51,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 46 transitions, 263 flow [2025-02-06 12:31:51,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 46 transitions, 253 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 12:31:51,030 INFO L231 Difference]: Finished difference. Result has 65 places, 42 transitions, 205 flow [2025-02-06 12:31:51,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=65, PETRI_TRANSITIONS=42} [2025-02-06 12:31:51,030 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2025-02-06 12:31:51,030 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 42 transitions, 205 flow [2025-02-06 12:31:51,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.214285714285715) internal successors, (381), 14 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:51,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:51,033 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:51,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 12:31:51,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:51,234 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:51,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1233468568, now seen corresponding path program 2 times [2025-02-06 12:31:51,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:51,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748948872] [2025-02-06 12:31:51,236 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:51,245 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-02-06 12:31:51,252 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-06 12:31:51,253 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:31:51,253 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:51,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:51,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748948872] [2025-02-06 12:31:51,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748948872] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:51,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146338527] [2025-02-06 12:31:51,488 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:51,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:51,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:51,490 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:51,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 12:31:51,543 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-02-06 12:31:51,569 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-06 12:31:51,569 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:31:51,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:51,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 12:31:51,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:51,612 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:31:51,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:31:51,618 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 14 treesize of output 9 [2025-02-06 12:31:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:51,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:52,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146338527] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:52,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:52,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2025-02-06 12:31:52,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076562882] [2025-02-06 12:31:52,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:52,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 12:31:52,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:52,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 12:31:52,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2025-02-06 12:31:52,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-06 12:31:52,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 42 transitions, 205 flow. Second operand has 22 states, 22 states have (on average 22.545454545454547) internal successors, (496), 22 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:52,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:52,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-06 12:31:52,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:53,287 INFO L124 PetriNetUnfolderBase]: 50/214 cut-off events. [2025-02-06 12:31:53,288 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2025-02-06 12:31:53,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641 conditions, 214 events. 50/214 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 321 event pairs, 6 based on Foata normal form. 8/221 useless extension candidates. Maximal degree in co-relation 605. Up to 40 conditions per place. [2025-02-06 12:31:53,289 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 47 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2025-02-06 12:31:53,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 493 flow [2025-02-06 12:31:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 12:31:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 12:31:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2025-02-06 12:31:53,292 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5246212121212122 [2025-02-06 12:31:53,292 INFO L175 Difference]: Start difference. First operand has 65 places, 42 transitions, 205 flow. Second operand 11 states and 277 transitions. [2025-02-06 12:31:53,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 493 flow [2025-02-06 12:31:53,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 481 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-06 12:31:53,297 INFO L231 Difference]: Finished difference. Result has 75 places, 51 transitions, 337 flow [2025-02-06 12:31:53,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=337, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2025-02-06 12:31:53,297 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2025-02-06 12:31:53,298 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 337 flow [2025-02-06 12:31:53,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.545454545454547) internal successors, (496), 22 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:53,298 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:53,298 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:53,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 12:31:53,498 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,SelfDestructingSolverStorable11 [2025-02-06 12:31:53,499 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:53,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:53,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1920927440, now seen corresponding path program 2 times [2025-02-06 12:31:53,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:53,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182864858] [2025-02-06 12:31:53,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:53,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:53,509 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-06 12:31:53,519 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-06 12:31:53,519 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:31:53,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:53,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182864858] [2025-02-06 12:31:53,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182864858] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873716277] [2025-02-06 12:31:53,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:53,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:53,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:53,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:53,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 12:31:53,764 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-06 12:31:53,788 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-06 12:31:53,788 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:31:53,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:53,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 12:31:53,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:53,974 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 15 treesize of output 7 [2025-02-06 12:31:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:53,984 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:54,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873716277] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:54,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:54,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-02-06 12:31:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491573022] [2025-02-06 12:31:54,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:54,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 12:31:54,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:54,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 12:31:54,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2025-02-06 12:31:54,353 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:31:54,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 337 flow. Second operand has 17 states, 17 states have (on average 26.88235294117647) internal successors, (457), 17 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:54,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:54,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:31:54,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:54,586 INFO L124 PetriNetUnfolderBase]: 35/198 cut-off events. [2025-02-06 12:31:54,586 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2025-02-06 12:31:54,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 198 events. 35/198 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 301 event pairs, 18 based on Foata normal form. 2/200 useless extension candidates. Maximal degree in co-relation 590. Up to 74 conditions per place. [2025-02-06 12:31:54,588 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2025-02-06 12:31:54,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 56 transitions, 419 flow [2025-02-06 12:31:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 12:31:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 12:31:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2025-02-06 12:31:54,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-02-06 12:31:54,590 INFO L175 Difference]: Start difference. First operand has 75 places, 51 transitions, 337 flow. Second operand 8 states and 224 transitions. [2025-02-06 12:31:54,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 56 transitions, 419 flow [2025-02-06 12:31:54,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 56 transitions, 412 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:31:54,598 INFO L231 Difference]: Finished difference. Result has 80 places, 51 transitions, 346 flow [2025-02-06 12:31:54,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=80, PETRI_TRANSITIONS=51} [2025-02-06 12:31:54,598 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2025-02-06 12:31:54,599 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 51 transitions, 346 flow [2025-02-06 12:31:54,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 26.88235294117647) internal successors, (457), 17 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:54,599 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:54,599 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:54,607 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 12:31:54,799 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,SelfDestructingSolverStorable12 [2025-02-06 12:31:54,800 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:54,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash -47673894, now seen corresponding path program 2 times [2025-02-06 12:31:54,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:54,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30327750] [2025-02-06 12:31:54,800 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:54,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:54,807 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-06 12:31:54,810 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 42 statements. [2025-02-06 12:31:54,810 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 12:31:54,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-06 12:31:54,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:54,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30327750] [2025-02-06 12:31:54,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30327750] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:54,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759410720] [2025-02-06 12:31:54,932 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:31:54,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:54,935 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:54,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 12:31:54,990 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-06 12:31:55,006 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 42 statements. [2025-02-06 12:31:55,006 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 12:31:55,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:55,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 12:31:55,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:55,040 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:31:55,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:31:55,049 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 14 treesize of output 9 [2025-02-06 12:31:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-06 12:31:55,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-06 12:31:55,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759410720] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:55,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:55,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-02-06 12:31:55,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136555433] [2025-02-06 12:31:55,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:55,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 12:31:55,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:55,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 12:31:55,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2025-02-06 12:31:56,257 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-06 12:31:56,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 51 transitions, 346 flow. Second operand has 14 states, 14 states have (on average 22.214285714285715) internal successors, (311), 14 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:56,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:56,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-06 12:31:56,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:56,438 INFO L124 PetriNetUnfolderBase]: 55/210 cut-off events. [2025-02-06 12:31:56,438 INFO L125 PetriNetUnfolderBase]: For 611/611 co-relation queries the response was YES. [2025-02-06 12:31:56,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 210 events. 55/210 cut-off events. For 611/611 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 290 event pairs, 2 based on Foata normal form. 8/218 useless extension candidates. Maximal degree in co-relation 660. Up to 80 conditions per place. [2025-02-06 12:31:56,440 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 25 selfloop transitions, 19 changer transitions 0/55 dead transitions. [2025-02-06 12:31:56,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 55 transitions, 436 flow [2025-02-06 12:31:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:31:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:31:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2025-02-06 12:31:56,442 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2025-02-06 12:31:56,442 INFO L175 Difference]: Start difference. First operand has 80 places, 51 transitions, 346 flow. Second operand 6 states and 141 transitions. [2025-02-06 12:31:56,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 55 transitions, 436 flow [2025-02-06 12:31:56,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 55 transitions, 402 flow, removed 2 selfloop flow, removed 10 redundant places. [2025-02-06 12:31:56,446 INFO L231 Difference]: Finished difference. Result has 75 places, 51 transitions, 357 flow [2025-02-06 12:31:56,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2025-02-06 12:31:56,447 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2025-02-06 12:31:56,447 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 357 flow [2025-02-06 12:31:56,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.214285714285715) internal successors, (311), 14 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:56,448 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:56,448 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:56,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 12:31:56,653 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,SelfDestructingSolverStorable13 [2025-02-06 12:31:56,653 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:56,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash 937055726, now seen corresponding path program 3 times [2025-02-06 12:31:56,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:56,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247774180] [2025-02-06 12:31:56,656 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:31:56,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:56,666 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 5 equivalence classes. [2025-02-06 12:31:56,698 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 48 of 48 statements. [2025-02-06 12:31:56,699 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-06 12:31:56,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:57,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:57,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247774180] [2025-02-06 12:31:57,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247774180] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:57,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243342360] [2025-02-06 12:31:57,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:31:57,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:57,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:31:57,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:31:57,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 12:31:57,715 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 5 equivalence classes. [2025-02-06 12:31:57,755 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 48 of 48 statements. [2025-02-06 12:31:57,756 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-06 12:31:57,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:57,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 12:31:57,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:31:58,027 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 15 treesize of output 7 [2025-02-06 12:31:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:58,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:31:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243342360] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:31:58,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:31:58,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 24 [2025-02-06 12:31:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382012213] [2025-02-06 12:31:58,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:31:58,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 12:31:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:31:58,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 12:31:58,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2025-02-06 12:31:58,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2025-02-06 12:31:58,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 357 flow. Second operand has 25 states, 25 states have (on average 20.64) internal successors, (516), 25 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:58,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:31:58,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2025-02-06 12:31:58,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:31:59,558 INFO L124 PetriNetUnfolderBase]: 48/201 cut-off events. [2025-02-06 12:31:59,558 INFO L125 PetriNetUnfolderBase]: For 682/682 co-relation queries the response was YES. [2025-02-06 12:31:59,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 201 events. 48/201 cut-off events. For 682/682 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 275 event pairs, 21 based on Foata normal form. 2/203 useless extension candidates. Maximal degree in co-relation 643. Up to 84 conditions per place. [2025-02-06 12:31:59,559 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 45 selfloop transitions, 13 changer transitions 0/66 dead transitions. [2025-02-06 12:31:59,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 66 transitions, 525 flow [2025-02-06 12:31:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 12:31:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 12:31:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2025-02-06 12:31:59,563 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-02-06 12:31:59,563 INFO L175 Difference]: Start difference. First operand has 75 places, 51 transitions, 357 flow. Second operand 13 states and 273 transitions. [2025-02-06 12:31:59,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 66 transitions, 525 flow [2025-02-06 12:31:59,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 66 transitions, 497 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:31:59,569 INFO L231 Difference]: Finished difference. Result has 85 places, 51 transitions, 361 flow [2025-02-06 12:31:59,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=361, PETRI_PLACES=85, PETRI_TRANSITIONS=51} [2025-02-06 12:31:59,570 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 39 predicate places. [2025-02-06 12:31:59,570 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 51 transitions, 361 flow [2025-02-06 12:31:59,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 20.64) internal successors, (516), 25 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:31:59,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:31:59,572 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:31:59,580 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 12:31:59,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:59,772 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:31:59,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:31:59,773 INFO L85 PathProgramCache]: Analyzing trace with hash 826795108, now seen corresponding path program 4 times [2025-02-06 12:31:59,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:31:59,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729499263] [2025-02-06 12:31:59,774 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 12:31:59,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:31:59,780 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-06 12:31:59,790 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-02-06 12:31:59,790 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 12:31:59,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:31:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:31:59,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:31:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729499263] [2025-02-06 12:31:59,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729499263] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:31:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992304104] [2025-02-06 12:31:59,999 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 12:31:59,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:31:59,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:00,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:00,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 12:32:00,054 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-06 12:32:00,091 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-02-06 12:32:00,091 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 12:32:00,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:00,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 12:32:00,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:00,392 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 15 treesize of output 7 [2025-02-06 12:32:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:00,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:00,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992304104] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:00,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:00,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2025-02-06 12:32:00,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139462875] [2025-02-06 12:32:00,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:00,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 12:32:00,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:00,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 12:32:00,545 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2025-02-06 12:32:00,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:32:00,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 51 transitions, 361 flow. Second operand has 23 states, 23 states have (on average 26.73913043478261) internal successors, (615), 23 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:00,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:00,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:32:00,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:01,165 INFO L124 PetriNetUnfolderBase]: 29/180 cut-off events. [2025-02-06 12:32:01,165 INFO L125 PetriNetUnfolderBase]: For 599/599 co-relation queries the response was YES. [2025-02-06 12:32:01,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 180 events. 29/180 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 12 based on Foata normal form. 2/182 useless extension candidates. Maximal degree in co-relation 559. Up to 52 conditions per place. [2025-02-06 12:32:01,168 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2025-02-06 12:32:01,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 58 transitions, 455 flow [2025-02-06 12:32:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 12:32:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 12:32:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2025-02-06 12:32:01,171 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2025-02-06 12:32:01,171 INFO L175 Difference]: Start difference. First operand has 85 places, 51 transitions, 361 flow. Second operand 10 states and 278 transitions. [2025-02-06 12:32:01,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 58 transitions, 455 flow [2025-02-06 12:32:01,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 58 transitions, 426 flow, removed 3 selfloop flow, removed 10 redundant places. [2025-02-06 12:32:01,176 INFO L231 Difference]: Finished difference. Result has 86 places, 51 transitions, 356 flow [2025-02-06 12:32:01,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=356, PETRI_PLACES=86, PETRI_TRANSITIONS=51} [2025-02-06 12:32:01,177 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2025-02-06 12:32:01,178 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 51 transitions, 356 flow [2025-02-06 12:32:01,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 26.73913043478261) internal successors, (615), 23 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:01,178 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:01,179 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:01,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 12:32:01,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 12:32:01,379 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:01,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash 954427138, now seen corresponding path program 5 times [2025-02-06 12:32:01,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:01,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21887394] [2025-02-06 12:32:01,380 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 12:32:01,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:01,390 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 7 equivalence classes. [2025-02-06 12:32:01,400 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 57 of 62 statements. [2025-02-06 12:32:01,401 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-06 12:32:01,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:01,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:01,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21887394] [2025-02-06 12:32:01,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21887394] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:01,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658089956] [2025-02-06 12:32:01,672 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 12:32:01,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:01,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:01,674 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:01,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 12:32:01,731 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 7 equivalence classes. [2025-02-06 12:32:01,767 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 57 of 62 statements. [2025-02-06 12:32:01,768 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-06 12:32:01,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:01,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 12:32:01,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:02,102 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 15 treesize of output 7 [2025-02-06 12:32:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:02,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:02,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658089956] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:02,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:02,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-02-06 12:32:02,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417490264] [2025-02-06 12:32:02,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:02,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 12:32:02,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:02,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 12:32:02,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-02-06 12:32:02,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:32:02,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 51 transitions, 356 flow. Second operand has 26 states, 26 states have (on average 26.653846153846153) internal successors, (693), 26 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:02,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:02,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:32:02,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:03,219 INFO L124 PetriNetUnfolderBase]: 26/175 cut-off events. [2025-02-06 12:32:03,220 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2025-02-06 12:32:03,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 175 events. 26/175 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 9 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 535. Up to 41 conditions per place. [2025-02-06 12:32:03,221 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2025-02-06 12:32:03,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 59 transitions, 456 flow [2025-02-06 12:32:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 12:32:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 12:32:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2025-02-06 12:32:03,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5776515151515151 [2025-02-06 12:32:03,223 INFO L175 Difference]: Start difference. First operand has 86 places, 51 transitions, 356 flow. Second operand 11 states and 305 transitions. [2025-02-06 12:32:03,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 59 transitions, 456 flow [2025-02-06 12:32:03,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 59 transitions, 432 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-02-06 12:32:03,227 INFO L231 Difference]: Finished difference. Result has 90 places, 51 transitions, 360 flow [2025-02-06 12:32:03,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=360, PETRI_PLACES=90, PETRI_TRANSITIONS=51} [2025-02-06 12:32:03,230 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 44 predicate places. [2025-02-06 12:32:03,230 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 51 transitions, 360 flow [2025-02-06 12:32:03,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 26.653846153846153) internal successors, (693), 26 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:03,231 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:03,231 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:03,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 12:32:03,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:03,432 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:03,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1850157032, now seen corresponding path program 3 times [2025-02-06 12:32:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:03,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614092231] [2025-02-06 12:32:03,433 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:32:03,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:03,442 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 9 equivalence classes. [2025-02-06 12:32:03,449 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 68 statements. [2025-02-06 12:32:03,451 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 12:32:03,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-06 12:32:03,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:03,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614092231] [2025-02-06 12:32:03,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614092231] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:03,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522007795] [2025-02-06 12:32:03,620 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:32:03,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:03,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:03,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:03,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 12:32:03,681 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 9 equivalence classes. [2025-02-06 12:32:03,695 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 68 statements. [2025-02-06 12:32:03,695 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 12:32:03,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:03,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-06 12:32:03,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:03,731 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:32:03,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:32:03,737 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 14 treesize of output 9 [2025-02-06 12:32:04,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:32:04,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-02-06 12:32:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-06 12:32:04,557 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-06 12:32:05,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522007795] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:05,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:05,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2025-02-06 12:32:05,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934549751] [2025-02-06 12:32:05,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:05,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 12:32:05,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:05,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 12:32:05,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2025-02-06 12:32:06,042 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-06 12:32:06,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 51 transitions, 360 flow. Second operand has 21 states, 21 states have (on average 21.714285714285715) internal successors, (456), 21 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:06,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:06,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-06 12:32:06,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:06,415 INFO L124 PetriNetUnfolderBase]: 51/198 cut-off events. [2025-02-06 12:32:06,415 INFO L125 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2025-02-06 12:32:06,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 198 events. 51/198 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 251 event pairs, 2 based on Foata normal form. 2/200 useless extension candidates. Maximal degree in co-relation 625. Up to 71 conditions per place. [2025-02-06 12:32:06,417 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 26 selfloop transitions, 23 changer transitions 0/58 dead transitions. [2025-02-06 12:32:06,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 58 transitions, 458 flow [2025-02-06 12:32:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 12:32:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 12:32:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2025-02-06 12:32:06,420 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2025-02-06 12:32:06,420 INFO L175 Difference]: Start difference. First operand has 90 places, 51 transitions, 360 flow. Second operand 9 states and 205 transitions. [2025-02-06 12:32:06,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 58 transitions, 458 flow [2025-02-06 12:32:06,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 403 flow, removed 5 selfloop flow, removed 17 redundant places. [2025-02-06 12:32:06,424 INFO L231 Difference]: Finished difference. Result has 80 places, 51 transitions, 337 flow [2025-02-06 12:32:06,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=337, PETRI_PLACES=80, PETRI_TRANSITIONS=51} [2025-02-06 12:32:06,425 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2025-02-06 12:32:06,425 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 51 transitions, 337 flow [2025-02-06 12:32:06,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.714285714285715) internal successors, (456), 21 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:06,426 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:06,426 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:06,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 12:32:06,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 12:32:06,626 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:06,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash 817814352, now seen corresponding path program 6 times [2025-02-06 12:32:06,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:06,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41112920] [2025-02-06 12:32:06,627 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 12:32:06,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:06,634 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 69 statements into 8 equivalence classes. [2025-02-06 12:32:06,652 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 69 of 69 statements. [2025-02-06 12:32:06,653 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-02-06 12:32:06,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 1 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:07,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41112920] [2025-02-06 12:32:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41112920] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242221856] [2025-02-06 12:32:07,838 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 12:32:07,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:07,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:07,840 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:07,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 12:32:07,891 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 69 statements into 8 equivalence classes. [2025-02-06 12:32:07,934 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 69 of 69 statements. [2025-02-06 12:32:07,934 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-02-06 12:32:07,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:07,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 12:32:07,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:08,281 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 15 treesize of output 7 [2025-02-06 12:32:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 1 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:08,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 1 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:08,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242221856] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:08,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:08,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 31 [2025-02-06 12:32:08,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941519646] [2025-02-06 12:32:08,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:08,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-06 12:32:08,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:08,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-06 12:32:08,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2025-02-06 12:32:09,600 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:32:09,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 51 transitions, 337 flow. Second operand has 32 states, 32 states have (on average 24.9375) internal successors, (798), 32 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:09,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:09,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:32:09,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:10,337 INFO L124 PetriNetUnfolderBase]: 32/183 cut-off events. [2025-02-06 12:32:10,337 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2025-02-06 12:32:10,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 183 events. 32/183 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 5 based on Foata normal form. 2/185 useless extension candidates. Maximal degree in co-relation 551. Up to 30 conditions per place. [2025-02-06 12:32:10,338 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 40 selfloop transitions, 15 changer transitions 0/68 dead transitions. [2025-02-06 12:32:10,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 68 transitions, 511 flow [2025-02-06 12:32:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 12:32:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 12:32:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 386 transitions. [2025-02-06 12:32:10,340 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5361111111111111 [2025-02-06 12:32:10,340 INFO L175 Difference]: Start difference. First operand has 80 places, 51 transitions, 337 flow. Second operand 15 states and 386 transitions. [2025-02-06 12:32:10,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 68 transitions, 511 flow [2025-02-06 12:32:10,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 68 transitions, 501 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-06 12:32:10,343 INFO L231 Difference]: Finished difference. Result has 91 places, 51 transitions, 365 flow [2025-02-06 12:32:10,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=365, PETRI_PLACES=91, PETRI_TRANSITIONS=51} [2025-02-06 12:32:10,344 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 45 predicate places. [2025-02-06 12:32:10,345 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 51 transitions, 365 flow [2025-02-06 12:32:10,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 24.9375) internal successors, (798), 32 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:10,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:10,346 INFO L206 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:10,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 12:32:10,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:10,546 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:10,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -261690174, now seen corresponding path program 7 times [2025-02-06 12:32:10,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:10,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146214505] [2025-02-06 12:32:10,547 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 12:32:10,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:10,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-06 12:32:10,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-06 12:32:10,569 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:10,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 12:32:10,569 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 12:32:10,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-06 12:32:10,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-06 12:32:10,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:10,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 12:32:10,616 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 12:32:10,617 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 12:32:10,617 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2025-02-06 12:32:10,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-02-06 12:32:10,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-02-06 12:32:10,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-02-06 12:32:10,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-02-06 12:32:10,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-02-06 12:32:10,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-02-06 12:32:10,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-02-06 12:32:10,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2025-02-06 12:32:10,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2025-02-06 12:32:10,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2025-02-06 12:32:10,620 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2025-02-06 12:32:10,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-02-06 12:32:10,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-02-06 12:32:10,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-02-06 12:32:10,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-02-06 12:32:10,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-02-06 12:32:10,621 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-02-06 12:32:10,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-06 12:32:10,622 INFO L422 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:10,686 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 12:32:10,687 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 12:32:10,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 12:32:10 BasicIcfg [2025-02-06 12:32:10,692 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 12:32:10,692 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 12:32:10,692 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 12:32:10,693 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 12:32:10,693 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:31:44" (3/4) ... [2025-02-06 12:32:10,694 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-02-06 12:32:10,695 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 12:32:10,696 INFO L158 Benchmark]: Toolchain (without parser) took 27291.10ms. Allocated memory was 142.6MB in the beginning and 394.3MB in the end (delta: 251.7MB). Free memory was 105.1MB in the beginning and 176.2MB in the end (delta: -71.1MB). Peak memory consumption was 181.6MB. Max. memory is 16.1GB. [2025-02-06 12:32:10,696 INFO L158 Benchmark]: CDTParser took 0.78ms. Allocated memory is still 201.3MB. Free memory is still 126.2MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:32:10,696 INFO L158 Benchmark]: CACSL2BoogieTranslator took 674.00ms. Allocated memory is still 142.6MB. Free memory was 105.1MB in the beginning and 73.2MB in the end (delta: 31.9MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-02-06 12:32:10,696 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.38ms. Allocated memory is still 142.6MB. Free memory was 73.2MB in the beginning and 71.3MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:32:10,697 INFO L158 Benchmark]: Boogie Preprocessor took 60.06ms. Allocated memory is still 142.6MB. Free memory was 71.3MB in the beginning and 69.4MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:32:10,697 INFO L158 Benchmark]: IcfgBuilder took 545.05ms. Allocated memory is still 142.6MB. Free memory was 69.4MB in the beginning and 45.2MB in the end (delta: 24.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-02-06 12:32:10,697 INFO L158 Benchmark]: TraceAbstraction took 25960.01ms. Allocated memory was 142.6MB in the beginning and 394.3MB in the end (delta: 251.7MB). Free memory was 45.2MB in the beginning and 176.3MB in the end (delta: -131.1MB). Peak memory consumption was 122.9MB. Max. memory is 16.1GB. [2025-02-06 12:32:10,697 INFO L158 Benchmark]: Witness Printer took 2.75ms. Allocated memory is still 394.3MB. Free memory was 176.3MB in the beginning and 176.2MB in the end (delta: 81.1kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:32:10,698 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78ms. Allocated memory is still 201.3MB. Free memory is still 126.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 674.00ms. Allocated memory is still 142.6MB. Free memory was 105.1MB in the beginning and 73.2MB in the end (delta: 31.9MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.38ms. Allocated memory is still 142.6MB. Free memory was 73.2MB in the beginning and 71.3MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 60.06ms. Allocated memory is still 142.6MB. Free memory was 71.3MB in the beginning and 69.4MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 545.05ms. Allocated memory is still 142.6MB. Free memory was 69.4MB in the beginning and 45.2MB in the end (delta: 24.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 25960.01ms. Allocated memory was 142.6MB in the beginning and 394.3MB in the end (delta: 251.7MB). Free memory was 45.2MB in the beginning and 176.3MB in the end (delta: -131.1MB). Peak memory consumption was 122.9MB. Max. memory is 16.1GB. * Witness Printer took 2.75ms. Allocated memory is still 394.3MB. Free memory was 176.3MB in the beginning and 176.2MB in the end (delta: 81.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\old(arg)={0:0}, t1=-2, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-2, v={-3:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-2, t2=-1, v={-3:0}] [L1116] COND TRUE 2 \read(*v) [L1116] CALL 2 strcpy(v, "Bigshot") [L1116] RET 2 strcpy(v, "Bigshot") [L1117] 2 return 0; [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-2, t2=-1, v={-3:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-2, t2=-1, v={-3:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, v={-3:0}] [L1126] EXPR 0 v[0] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-2, t2=-1, v={-3:0}] [L1126] CALL 0 __VERIFIER_assert(!v || v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\old(arg)={0:0}, \old(expression)=1, \result={0:0}, arg={0:0}, expression=1, v={-3:0}] [L1126] RET 0 __VERIFIER_assert(!v || v[0] == 'B') [L1127] 0 return 0; VAL [\old(arg)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=-2, t2=-1, v={-3:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 65 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 25.8s, OverallIterations: 20, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 10.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3179 SdHoareTripleChecker+Valid, 7.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2848 mSDsluCounter, 3707 SdHoareTripleChecker+Invalid, 6.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3668 mSDsCounter, 86 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14628 IncrementalHoareTripleChecker+Invalid, 14714 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 86 mSolverCounterUnsat, 39 mSDtfsCounter, 14628 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1172 GetRequests, 870 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=365occurred in iteration=19, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 1222 NumberOfCodeBlocks, 1058 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1604 ConstructedInterpolants, 74 QuantifiedInterpolants, 25869 SizeOfPredicates, 42 NumberOfNonLiveVariables, 2203 ConjunctsInSsa, 198 ConjunctsInUnsatCore, 41 InterpolantComputations, 8 PerfectInterpolantSequences, 695/2223 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-02-06 12:32:10,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/pthread/bigshot_s.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:32:12,952 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:32:13,056 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-02-06 12:32:13,064 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:32:13,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:32:13,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:32:13,097 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:32:13,098 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:32:13,098 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:32:13,098 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:32:13,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:32:13,099 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:32:13,099 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:32:13,099 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:32:13,100 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:32:13,100 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:32:13,100 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:32:13,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:32:13,100 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:32:13,101 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:32:13,101 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:32:13,101 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:32:13,101 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:32:13,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:32:13,101 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:32:13,101 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-02-06 12:32:13,101 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-02-06 12:32:13,102 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:32:13,102 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:32:13,102 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:32:13,102 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:32:13,102 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:32:13,102 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:32:13,102 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:32:13,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:32:13,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:32:13,102 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:32:13,102 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:32:13,103 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-02-06 12:32:13,103 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-02-06 12:32:13,103 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:32:13,104 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:32:13,104 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:32:13,104 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:32:13,104 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 -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2025-02-06 12:32:13,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:32:13,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:32:13,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:32:13,402 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:32:13,402 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:32:13,403 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s.i [2025-02-06 12:32:14,684 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e61cc6455/475386e6088748cdae9f93abd74b950f/FLAG1c222dfd0 [2025-02-06 12:32:14,944 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:32:14,944 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2025-02-06 12:32:14,965 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e61cc6455/475386e6088748cdae9f93abd74b950f/FLAG1c222dfd0 [2025-02-06 12:32:14,983 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e61cc6455/475386e6088748cdae9f93abd74b950f [2025-02-06 12:32:14,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:32:14,987 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:32:14,989 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:32:14,989 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:32:14,993 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:32:14,994 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:32:14" (1/1) ... [2025-02-06 12:32:14,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c76caea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:14, skipping insertion in model container [2025-02-06 12:32:14,997 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:32:14" (1/1) ... [2025-02-06 12:32:15,047 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:32:15,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:32:15,390 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:32:15,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:32:15,512 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:32:15,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15 WrapperNode [2025-02-06 12:32:15,513 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:32:15,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:32:15,515 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:32:15,515 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:32:15,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,571 INFO L138 Inliner]: procedures = 323, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 68 [2025-02-06 12:32:15,571 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:32:15,572 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:32:15,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:32:15,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:32:15,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,579 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,582 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,599 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2025-02-06 12:32:15,602 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,602 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,611 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,617 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,624 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:32:15,625 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:32:15,625 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:32:15,626 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:32:15,626 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (1/1) ... [2025-02-06 12:32:15,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:32:15,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:15,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 12:32:15,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 12:32:15,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2025-02-06 12:32:15,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2025-02-06 12:32:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2025-02-06 12:32:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-02-06 12:32:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-02-06 12:32:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-02-06 12:32:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 12:32:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 12:32:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 12:32:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 12:32:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2025-02-06 12:32:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2025-02-06 12:32:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2025-02-06 12:32:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 12:32:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:32:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:32:15,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:32:15,700 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:32:15,845 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:32:15,847 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:32:16,056 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:32:16,056 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:32:16,208 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:32:16,209 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:32:16,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:32:16 BoogieIcfgContainer [2025-02-06 12:32:16,209 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:32:16,212 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:32:16,212 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:32:16,217 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:32:16,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:32:14" (1/3) ... [2025-02-06 12:32:16,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359ff57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:32:16, skipping insertion in model container [2025-02-06 12:32:16,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:15" (2/3) ... [2025-02-06 12:32:16,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359ff57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:32:16, skipping insertion in model container [2025-02-06 12:32:16,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:32:16" (3/3) ... [2025-02-06 12:32:16,220 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2025-02-06 12:32:16,232 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:32:16,234 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s.i that has 3 procedures, 43 locations, 1 initial locations, 1 loop locations, and 10 error locations. [2025-02-06 12:32:16,234 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:32:16,296 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 12:32:16,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2025-02-06 12:32:16,363 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2025-02-06 12:32:16,367 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:32:16,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 80 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2025-02-06 12:32:16,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2025-02-06 12:32:16,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2025-02-06 12:32:16,380 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:32:16,389 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;@4413ab0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:32:16,389 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-02-06 12:32:16,399 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:32:16,400 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2025-02-06 12:32:16,400 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:32:16,400 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:16,400 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:16,401 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:16,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2090870174, now seen corresponding path program 1 times [2025-02-06 12:32:16,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:16,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415091216] [2025-02-06 12:32:16,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:16,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:16,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:16,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 12:32:16,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:32:16,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:32:16,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:16,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:16,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 12:32:16,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:16,619 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-02-06 12:32:16,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-02-06 12:32:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:16,671 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:32:16,672 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415091216] [2025-02-06 12:32:16,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415091216] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:32:16,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:32:16,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:32:16,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401892731] [2025-02-06 12:32:16,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:32:16,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:32:16,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:16,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:32:16,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:32:16,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2025-02-06 12:32:16,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:32:16,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:16,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2025-02-06 12:32:16,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:16,861 INFO L124 PetriNetUnfolderBase]: 9/60 cut-off events. [2025-02-06 12:32:16,861 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:32:16,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 60 events. 9/60 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 156 event pairs, 2 based on Foata normal form. 6/57 useless extension candidates. Maximal degree in co-relation 78. Up to 21 conditions per place. [2025-02-06 12:32:16,862 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 16 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2025-02-06 12:32:16,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 130 flow [2025-02-06 12:32:16,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:32:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:32:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-02-06 12:32:16,876 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-02-06 12:32:16,878 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 4 states and 116 transitions. [2025-02-06 12:32:16,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 130 flow [2025-02-06 12:32:16,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 122 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:32:16,887 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 88 flow [2025-02-06 12:32:16,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2025-02-06 12:32:16,893 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-06 12:32:16,895 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 88 flow [2025-02-06 12:32:16,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:32:16,895 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:16,895 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:16,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 12:32:17,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:17,096 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:17,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash -392465768, now seen corresponding path program 1 times [2025-02-06 12:32:17,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:17,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921158426] [2025-02-06 12:32:17,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:17,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:17,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:17,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:17,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 12:32:17,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 12:32:17,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 12:32:17,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:17,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:17,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:32:17,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:32:17,222 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 14 treesize of output 9 [2025-02-06 12:32:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:17,312 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:32:17,312 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:17,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921158426] [2025-02-06 12:32:17,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921158426] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:32:17,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:32:17,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:32:17,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254576839] [2025-02-06 12:32:17,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:32:17,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:32:17,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:17,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:32:17,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:32:17,391 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:32:17,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 12:32:17,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:17,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:32:17,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:17,502 INFO L124 PetriNetUnfolderBase]: 17/81 cut-off events. [2025-02-06 12:32:17,502 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-06 12:32:17,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 81 events. 17/81 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 195 event pairs, 7 based on Foata normal form. 2/69 useless extension candidates. Maximal degree in co-relation 56. Up to 40 conditions per place. [2025-02-06 12:32:17,503 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 22 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2025-02-06 12:32:17,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 152 flow [2025-02-06 12:32:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:32:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:32:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-02-06 12:32:17,505 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-02-06 12:32:17,505 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 88 flow. Second operand 4 states and 116 transitions. [2025-02-06 12:32:17,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 152 flow [2025-02-06 12:32:17,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 144 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:32:17,508 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 105 flow [2025-02-06 12:32:17,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2025-02-06 12:32:17,509 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2025-02-06 12:32:17,509 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 105 flow [2025-02-06 12:32:17,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 12:32:17,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:17,509 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:17,519 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 12:32:17,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:17,711 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:17,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:17,712 INFO L85 PathProgramCache]: Analyzing trace with hash 718463268, now seen corresponding path program 1 times [2025-02-06 12:32:17,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:17,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115836256] [2025-02-06 12:32:17,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:17,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:17,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:17,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:17,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 12:32:17,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 12:32:17,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 12:32:17,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:17,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:17,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 12:32:17,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:17,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-02-06 12:32:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:17,843 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:32:17,843 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:17,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115836256] [2025-02-06 12:32:17,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115836256] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:32:17,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:32:17,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:32:17,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919153228] [2025-02-06 12:32:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:32:17,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:32:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:17,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:32:17,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:32:17,878 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:32:17,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:17,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:17,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:32:17,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:17,950 INFO L124 PetriNetUnfolderBase]: 15/81 cut-off events. [2025-02-06 12:32:17,950 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-06 12:32:17,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 81 events. 15/81 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 182 event pairs, 1 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 20 conditions per place. [2025-02-06 12:32:17,951 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 19 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2025-02-06 12:32:17,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 151 flow [2025-02-06 12:32:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:32:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:32:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2025-02-06 12:32:17,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.578125 [2025-02-06 12:32:17,953 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 105 flow. Second operand 4 states and 111 transitions. [2025-02-06 12:32:17,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 151 flow [2025-02-06 12:32:17,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:32:17,954 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 104 flow [2025-02-06 12:32:17,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2025-02-06 12:32:17,954 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-06 12:32:17,955 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 104 flow [2025-02-06 12:32:17,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:17,955 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:17,955 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:17,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 12:32:18,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:18,159 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:18,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash 797525018, now seen corresponding path program 1 times [2025-02-06 12:32:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:18,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717603002] [2025-02-06 12:32:18,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:18,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:18,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:18,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:18,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 12:32:18,215 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 12:32:18,227 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 12:32:18,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:18,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:18,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 12:32:18,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:18,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:32:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:18,349 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:32:18,349 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:18,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717603002] [2025-02-06 12:32:18,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717603002] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:32:18,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:32:18,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:32:18,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326863799] [2025-02-06 12:32:18,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:32:18,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:32:18,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:18,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:32:18,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:32:18,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2025-02-06 12:32:18,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:32:18,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:18,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2025-02-06 12:32:18,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:18,487 INFO L124 PetriNetUnfolderBase]: 14/69 cut-off events. [2025-02-06 12:32:18,487 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-02-06 12:32:18,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 69 events. 14/69 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 138 event pairs, 4 based on Foata normal form. 2/66 useless extension candidates. Maximal degree in co-relation 49. Up to 31 conditions per place. [2025-02-06 12:32:18,488 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 20 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2025-02-06 12:32:18,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 156 flow [2025-02-06 12:32:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:32:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:32:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2025-02-06 12:32:18,493 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2025-02-06 12:32:18,493 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 104 flow. Second operand 4 states and 118 transitions. [2025-02-06 12:32:18,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 156 flow [2025-02-06 12:32:18,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 148 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:32:18,495 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 107 flow [2025-02-06 12:32:18,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2025-02-06 12:32:18,495 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-06 12:32:18,497 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 107 flow [2025-02-06 12:32:18,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:32:18,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:18,497 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:18,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 12:32:18,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:18,700 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:18,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash -26285666, now seen corresponding path program 1 times [2025-02-06 12:32:18,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:18,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813993694] [2025-02-06 12:32:18,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:18,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:18,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:18,703 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:18,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 12:32:18,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 12:32:18,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 12:32:18,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:18,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:18,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-06 12:32:18,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:18,784 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:32:18,784 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:18,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813993694] [2025-02-06 12:32:18,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813993694] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:32:18,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:32:18,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:32:18,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026601320] [2025-02-06 12:32:18,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:32:18,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:32:18,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:18,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:32:18,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:32:18,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:32:18,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:18,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:18,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:32:18,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:18,857 INFO L124 PetriNetUnfolderBase]: 12/69 cut-off events. [2025-02-06 12:32:18,857 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-02-06 12:32:18,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 69 events. 12/69 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 135 event pairs, 6 based on Foata normal form. 2/68 useless extension candidates. Maximal degree in co-relation 45. Up to 34 conditions per place. [2025-02-06 12:32:18,858 INFO L140 encePairwiseOnDemand]: 46/48 looper letters, 20 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2025-02-06 12:32:18,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 149 flow [2025-02-06 12:32:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:32:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:32:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2025-02-06 12:32:18,859 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2025-02-06 12:32:18,859 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 107 flow. Second operand 3 states and 92 transitions. [2025-02-06 12:32:18,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 149 flow [2025-02-06 12:32:18,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 141 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:32:18,860 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 99 flow [2025-02-06 12:32:18,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2025-02-06 12:32:18,861 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2025-02-06 12:32:18,861 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 99 flow [2025-02-06 12:32:18,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:18,861 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:18,861 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:18,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 12:32:19,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:19,066 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:19,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1594417916, now seen corresponding path program 1 times [2025-02-06 12:32:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:19,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925000181] [2025-02-06 12:32:19,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:19,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:19,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:19,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:19,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 12:32:19,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 12:32:19,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:32:19,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:19,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:19,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 12:32:19,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:19,164 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-06 12:32:19,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-06 12:32:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:19,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:19,662 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:19,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925000181] [2025-02-06 12:32:19,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925000181] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:19,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:19,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-02-06 12:32:19,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080864127] [2025-02-06 12:32:19,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:19,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 12:32:19,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:19,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 12:32:19,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2025-02-06 12:32:20,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:32:20,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 99 flow. Second operand has 10 states, 10 states have (on average 24.4) internal successors, (244), 10 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:20,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:20,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:32:20,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:20,392 INFO L124 PetriNetUnfolderBase]: 26/127 cut-off events. [2025-02-06 12:32:20,392 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2025-02-06 12:32:20,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 127 events. 26/127 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 229 event pairs, 3 based on Foata normal form. 12/136 useless extension candidates. Maximal degree in co-relation 217. Up to 27 conditions per place. [2025-02-06 12:32:20,394 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 26 selfloop transitions, 13 changer transitions 0/53 dead transitions. [2025-02-06 12:32:20,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 215 flow [2025-02-06 12:32:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 12:32:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 12:32:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2025-02-06 12:32:20,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-02-06 12:32:20,395 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 99 flow. Second operand 9 states and 243 transitions. [2025-02-06 12:32:20,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 215 flow [2025-02-06 12:32:20,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:32:20,397 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 149 flow [2025-02-06 12:32:20,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=149, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2025-02-06 12:32:20,399 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2025-02-06 12:32:20,399 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 149 flow [2025-02-06 12:32:20,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.4) internal successors, (244), 10 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:20,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:20,399 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:20,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 12:32:20,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:20,600 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:20,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:20,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1067701378, now seen corresponding path program 1 times [2025-02-06 12:32:20,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:20,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882446083] [2025-02-06 12:32:20,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:20,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:20,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:20,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:20,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 12:32:20,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 12:32:20,668 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 12:32:20,671 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:20,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:20,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:32:20,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:20,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:32:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:20,839 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:20,945 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:20,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882446083] [2025-02-06 12:32:20,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882446083] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:20,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:20,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2025-02-06 12:32:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138533675] [2025-02-06 12:32:20,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:20,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 12:32:20,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:20,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 12:32:20,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 12:32:21,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-06 12:32:21,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 149 flow. Second operand has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:21,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:21,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-06 12:32:21,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:21,351 INFO L124 PetriNetUnfolderBase]: 26/124 cut-off events. [2025-02-06 12:32:21,352 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2025-02-06 12:32:21,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 124 events. 26/124 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 199 event pairs, 4 based on Foata normal form. 6/127 useless extension candidates. Maximal degree in co-relation 241. Up to 30 conditions per place. [2025-02-06 12:32:21,353 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 27 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2025-02-06 12:32:21,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 249 flow [2025-02-06 12:32:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:32:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:32:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2025-02-06 12:32:21,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2025-02-06 12:32:21,356 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 149 flow. Second operand 7 states and 195 transitions. [2025-02-06 12:32:21,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 249 flow [2025-02-06 12:32:21,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 226 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-02-06 12:32:21,357 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 176 flow [2025-02-06 12:32:21,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=176, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2025-02-06 12:32:21,358 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2025-02-06 12:32:21,358 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 176 flow [2025-02-06 12:32:21,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:21,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:21,360 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:21,370 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 12:32:21,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:21,561 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:21,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash -605047979, now seen corresponding path program 1 times [2025-02-06 12:32:21,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:21,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337653715] [2025-02-06 12:32:21,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:21,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:21,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:21,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 12:32:21,609 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-06 12:32:21,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 12:32:21,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:21,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:21,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 12:32:21,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:21,658 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:32:21,658 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:21,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337653715] [2025-02-06 12:32:21,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337653715] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:32:21,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:32:21,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:32:21,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419351812] [2025-02-06 12:32:21,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:32:21,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:32:21,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:21,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:32:21,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:32:21,674 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-06 12:32:21,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:32:21,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:21,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-06 12:32:21,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:21,758 INFO L124 PetriNetUnfolderBase]: 20/117 cut-off events. [2025-02-06 12:32:21,758 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2025-02-06 12:32:21,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 117 events. 20/117 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 190 event pairs, 11 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 252. Up to 51 conditions per place. [2025-02-06 12:32:21,760 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 24 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2025-02-06 12:32:21,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 42 transitions, 230 flow [2025-02-06 12:32:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:32:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:32:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2025-02-06 12:32:21,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2025-02-06 12:32:21,762 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 176 flow. Second operand 4 states and 106 transitions. [2025-02-06 12:32:21,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 42 transitions, 230 flow [2025-02-06 12:32:21,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 216 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 12:32:21,764 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 166 flow [2025-02-06 12:32:21,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2025-02-06 12:32:21,764 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 6 predicate places. [2025-02-06 12:32:21,764 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 166 flow [2025-02-06 12:32:21,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 12:32:21,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:21,766 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:21,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 12:32:21,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:21,967 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:21,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1574373038, now seen corresponding path program 1 times [2025-02-06 12:32:21,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:21,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534789733] [2025-02-06 12:32:21,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:21,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:21,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:21,970 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:21,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 12:32:22,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 12:32:22,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 12:32:22,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:22,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:22,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 12:32:22,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:22,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:32:22,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:32:22,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2025-02-06 12:32:22,282 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 34 treesize of output 22 [2025-02-06 12:32:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:22,309 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:32:22,309 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:22,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534789733] [2025-02-06 12:32:22,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534789733] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:32:22,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:32:22,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 12:32:22,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388433355] [2025-02-06 12:32:22,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:32:22,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 12:32:22,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:22,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 12:32:22,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-06 12:32:22,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-02-06 12:32:22,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 166 flow. Second operand has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:22,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:22,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-02-06 12:32:22,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:22,805 INFO L124 PetriNetUnfolderBase]: 25/140 cut-off events. [2025-02-06 12:32:22,805 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2025-02-06 12:32:22,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 140 events. 25/140 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 274 event pairs, 12 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 297. Up to 53 conditions per place. [2025-02-06 12:32:22,806 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 33 selfloop transitions, 12 changer transitions 0/57 dead transitions. [2025-02-06 12:32:22,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 293 flow [2025-02-06 12:32:22,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 12:32:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 12:32:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2025-02-06 12:32:22,807 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2025-02-06 12:32:22,808 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 166 flow. Second operand 12 states and 258 transitions. [2025-02-06 12:32:22,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 293 flow [2025-02-06 12:32:22,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 57 transitions, 283 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:32:22,813 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 224 flow [2025-02-06 12:32:22,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=224, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2025-02-06 12:32:22,814 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2025-02-06 12:32:22,814 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 224 flow [2025-02-06 12:32:22,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:22,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:22,814 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:22,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 12:32:23,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:23,015 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:23,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:23,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1962888328, now seen corresponding path program 1 times [2025-02-06 12:32:23,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:23,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332799865] [2025-02-06 12:32:23,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:23,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:23,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:23,018 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:23,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 12:32:23,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 12:32:23,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 12:32:23,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:23,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:23,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 12:32:23,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:23,185 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 17 treesize of output 9 [2025-02-06 12:32:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:23,194 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:32:23,194 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:23,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332799865] [2025-02-06 12:32:23,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332799865] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:32:23,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:32:23,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:32:23,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654478871] [2025-02-06 12:32:23,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:32:23,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:32:23,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:23,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:32:23,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:32:23,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-06 12:32:23,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 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 12:32:23,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:23,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-06 12:32:23,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:23,321 INFO L124 PetriNetUnfolderBase]: 21/122 cut-off events. [2025-02-06 12:32:23,321 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2025-02-06 12:32:23,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 122 events. 21/122 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 195 event pairs, 12 based on Foata normal form. 2/122 useless extension candidates. Maximal degree in co-relation 294. Up to 52 conditions per place. [2025-02-06 12:32:23,323 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2025-02-06 12:32:23,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 45 transitions, 254 flow [2025-02-06 12:32:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:32:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:32:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2025-02-06 12:32:23,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2025-02-06 12:32:23,324 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 224 flow. Second operand 6 states and 170 transitions. [2025-02-06 12:32:23,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 45 transitions, 254 flow [2025-02-06 12:32:23,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 45 transitions, 237 flow, removed 2 selfloop flow, removed 7 redundant places. [2025-02-06 12:32:23,326 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 183 flow [2025-02-06 12:32:23,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2025-02-06 12:32:23,327 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2025-02-06 12:32:23,327 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 183 flow [2025-02-06 12:32:23,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 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 12:32:23,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:23,327 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:23,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 12:32:23,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:23,528 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:23,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1810583614, now seen corresponding path program 1 times [2025-02-06 12:32:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:23,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304101074] [2025-02-06 12:32:23,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:23,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:23,530 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:23,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 12:32:23,582 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-06 12:32:23,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 12:32:23,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:23,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:23,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 12:32:23,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:23,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:32:23,949 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 17 treesize of output 9 [2025-02-06 12:32:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:23,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:24,228 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:24,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304101074] [2025-02-06 12:32:24,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304101074] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:24,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:24,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2025-02-06 12:32:24,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713366003] [2025-02-06 12:32:24,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:24,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 12:32:24,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:24,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 12:32:24,229 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-02-06 12:32:24,594 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-06 12:32:24,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 183 flow. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:24,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:24,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-06 12:32:24,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:25,015 INFO L124 PetriNetUnfolderBase]: 23/122 cut-off events. [2025-02-06 12:32:25,016 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2025-02-06 12:32:25,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 122 events. 23/122 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 195 event pairs, 6 based on Foata normal form. 2/122 useless extension candidates. Maximal degree in co-relation 280. Up to 32 conditions per place. [2025-02-06 12:32:25,017 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 28 selfloop transitions, 11 changer transitions 0/52 dead transitions. [2025-02-06 12:32:25,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 52 transitions, 283 flow [2025-02-06 12:32:25,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 12:32:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 12:32:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2025-02-06 12:32:25,019 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2025-02-06 12:32:25,019 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 183 flow. Second operand 10 states and 247 transitions. [2025-02-06 12:32:25,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 52 transitions, 283 flow [2025-02-06 12:32:25,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 273 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 12:32:25,021 INFO L231 Difference]: Finished difference. Result has 64 places, 42 transitions, 195 flow [2025-02-06 12:32:25,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=195, PETRI_PLACES=64, PETRI_TRANSITIONS=42} [2025-02-06 12:32:25,025 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2025-02-06 12:32:25,026 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 42 transitions, 195 flow [2025-02-06 12:32:25,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:25,027 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:25,027 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:25,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 12:32:25,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:25,228 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:25,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1963418008, now seen corresponding path program 2 times [2025-02-06 12:32:25,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:25,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575709524] [2025-02-06 12:32:25,230 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:32:25,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:25,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:25,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 12:32:25,279 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-02-06 12:32:25,308 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-06 12:32:25,308 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:32:25,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:25,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 12:32:25,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:25,335 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-06 12:32:25,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-06 12:32:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:25,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:26,771 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:26,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575709524] [2025-02-06 12:32:26,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575709524] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:26,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:26,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2025-02-06 12:32:26,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569169038] [2025-02-06 12:32:26,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:26,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 12:32:26,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:26,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 12:32:26,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2025-02-06 12:32:27,714 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-06 12:32:27,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 42 transitions, 195 flow. Second operand has 19 states, 19 states have (on average 21.63157894736842) internal successors, (411), 19 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:27,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:27,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-06 12:32:27,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:29,915 INFO L124 PetriNetUnfolderBase]: 70/267 cut-off events. [2025-02-06 12:32:29,915 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2025-02-06 12:32:29,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 267 events. 70/267 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 392 event pairs, 3 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 768. Up to 50 conditions per place. [2025-02-06 12:32:29,916 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 59 selfloop transitions, 28 changer transitions 0/98 dead transitions. [2025-02-06 12:32:29,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 686 flow [2025-02-06 12:32:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 12:32:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-06 12:32:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 434 transitions. [2025-02-06 12:32:29,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2025-02-06 12:32:29,918 INFO L175 Difference]: Start difference. First operand has 64 places, 42 transitions, 195 flow. Second operand 18 states and 434 transitions. [2025-02-06 12:32:29,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 686 flow [2025-02-06 12:32:29,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 98 transitions, 612 flow, removed 26 selfloop flow, removed 9 redundant places. [2025-02-06 12:32:29,922 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 424 flow [2025-02-06 12:32:29,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=424, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2025-02-06 12:32:29,922 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2025-02-06 12:32:29,923 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 424 flow [2025-02-06 12:32:29,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.63157894736842) internal successors, (411), 19 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:29,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:29,924 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:29,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 12:32:30,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:30,125 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:30,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1220443694, now seen corresponding path program 2 times [2025-02-06 12:32:30,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:30,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197187410] [2025-02-06 12:32:30,126 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:32:30,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:30,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:30,128 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:30,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 12:32:30,183 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-06 12:32:30,204 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-06 12:32:30,204 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:32:30,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:30,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 12:32:30,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:30,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:32:30,559 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 17 treesize of output 9 [2025-02-06 12:32:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:30,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:30,851 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:30,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197187410] [2025-02-06 12:32:30,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197187410] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:30,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:30,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2025-02-06 12:32:30,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158000927] [2025-02-06 12:32:30,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:30,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 12:32:30,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:30,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 12:32:30,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-02-06 12:32:31,296 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-06 12:32:31,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 424 flow. Second operand has 16 states, 16 states have (on average 23.5625) internal successors, (377), 16 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:31,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:31,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-06 12:32:31,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:31,744 INFO L124 PetriNetUnfolderBase]: 64/261 cut-off events. [2025-02-06 12:32:31,744 INFO L125 PetriNetUnfolderBase]: For 669/669 co-relation queries the response was YES. [2025-02-06 12:32:31,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 261 events. 64/261 cut-off events. For 669/669 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 387 event pairs, 16 based on Foata normal form. 2/263 useless extension candidates. Maximal degree in co-relation 813. Up to 72 conditions per place. [2025-02-06 12:32:31,746 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 37 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2025-02-06 12:32:31,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 562 flow [2025-02-06 12:32:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 12:32:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 12:32:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 294 transitions. [2025-02-06 12:32:31,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2025-02-06 12:32:31,748 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 424 flow. Second operand 12 states and 294 transitions. [2025-02-06 12:32:31,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 562 flow [2025-02-06 12:32:31,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 73 transitions, 553 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 12:32:31,754 INFO L231 Difference]: Finished difference. Result has 87 places, 61 transitions, 453 flow [2025-02-06 12:32:31,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=453, PETRI_PLACES=87, PETRI_TRANSITIONS=61} [2025-02-06 12:32:31,756 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2025-02-06 12:32:31,756 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 61 transitions, 453 flow [2025-02-06 12:32:31,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 23.5625) internal successors, (377), 16 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:31,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:31,756 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:31,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-06 12:32:31,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:31,957 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:31,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1354068762, now seen corresponding path program 2 times [2025-02-06 12:32:31,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:31,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752726354] [2025-02-06 12:32:31,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:32:31,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:31,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:31,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 12:32:32,007 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-06 12:32:32,016 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 42 statements. [2025-02-06 12:32:32,016 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 12:32:32,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:32,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 12:32:32,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:32,036 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-06 12:32:32,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-06 12:32:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-06 12:32:32,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-06 12:32:32,697 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:32,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752726354] [2025-02-06 12:32:32,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752726354] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:32,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:32,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-02-06 12:32:32,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495782378] [2025-02-06 12:32:32,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:32,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 12:32:32,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:32,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 12:32:32,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-02-06 12:32:33,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-06 12:32:33,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 61 transitions, 453 flow. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:33,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:33,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-06 12:32:33,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:33,184 INFO L124 PetriNetUnfolderBase]: 60/247 cut-off events. [2025-02-06 12:32:33,184 INFO L125 PetriNetUnfolderBase]: For 890/890 co-relation queries the response was YES. [2025-02-06 12:32:33,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 838 conditions, 247 events. 60/247 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 2 based on Foata normal form. 12/259 useless extension candidates. Maximal degree in co-relation 795. Up to 95 conditions per place. [2025-02-06 12:32:33,187 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 25 selfloop transitions, 24 changer transitions 0/62 dead transitions. [2025-02-06 12:32:33,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 62 transitions, 526 flow [2025-02-06 12:32:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:32:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:32:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2025-02-06 12:32:33,189 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5243055555555556 [2025-02-06 12:32:33,189 INFO L175 Difference]: Start difference. First operand has 87 places, 61 transitions, 453 flow. Second operand 6 states and 151 transitions. [2025-02-06 12:32:33,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 62 transitions, 526 flow [2025-02-06 12:32:33,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 62 transitions, 472 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-02-06 12:32:33,193 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 432 flow [2025-02-06 12:32:33,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=432, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2025-02-06 12:32:33,195 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2025-02-06 12:32:33,195 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 432 flow [2025-02-06 12:32:33,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:33,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:33,195 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:33,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-06 12:32:33,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:33,396 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:33,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash -495117330, now seen corresponding path program 3 times [2025-02-06 12:32:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:33,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118515684] [2025-02-06 12:32:33,397 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:32:33,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:33,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:33,399 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:33,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 12:32:33,450 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 4 equivalence classes. [2025-02-06 12:32:33,495 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 48 of 48 statements. [2025-02-06 12:32:33,495 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-06 12:32:33,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:33,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 12:32:33,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:33,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:32:33,967 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 17 treesize of output 9 [2025-02-06 12:32:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:33,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:34,307 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:34,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118515684] [2025-02-06 12:32:34,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118515684] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:34,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:34,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-02-06 12:32:34,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109952395] [2025-02-06 12:32:34,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:34,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 12:32:34,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:34,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 12:32:34,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-02-06 12:32:34,992 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-06 12:32:34,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 432 flow. Second operand has 18 states, 18 states have (on average 23.61111111111111) internal successors, (425), 18 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:34,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:34,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-06 12:32:34,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:35,485 INFO L124 PetriNetUnfolderBase]: 54/239 cut-off events. [2025-02-06 12:32:35,485 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2025-02-06 12:32:35,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 239 events. 54/239 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 328 event pairs, 14 based on Foata normal form. 2/241 useless extension candidates. Maximal degree in co-relation 765. Up to 64 conditions per place. [2025-02-06 12:32:35,487 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 38 selfloop transitions, 18 changer transitions 0/73 dead transitions. [2025-02-06 12:32:35,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 577 flow [2025-02-06 12:32:35,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 12:32:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 12:32:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 318 transitions. [2025-02-06 12:32:35,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2025-02-06 12:32:35,490 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 432 flow. Second operand 13 states and 318 transitions. [2025-02-06 12:32:35,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 577 flow [2025-02-06 12:32:35,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 73 transitions, 545 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:32:35,496 INFO L231 Difference]: Finished difference. Result has 88 places, 59 transitions, 432 flow [2025-02-06 12:32:35,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=432, PETRI_PLACES=88, PETRI_TRANSITIONS=59} [2025-02-06 12:32:35,497 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2025-02-06 12:32:35,498 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 59 transitions, 432 flow [2025-02-06 12:32:35,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.61111111111111) internal successors, (425), 18 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:35,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:35,498 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:35,507 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 12:32:35,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:35,699 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:35,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1114482086, now seen corresponding path program 4 times [2025-02-06 12:32:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:35,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278372979] [2025-02-06 12:32:35,700 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 12:32:35,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:35,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:35,703 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:35,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 12:32:35,749 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-06 12:32:35,782 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-02-06 12:32:35,782 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 12:32:35,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:35,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 12:32:35,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:35,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:32:36,282 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 17 treesize of output 9 [2025-02-06 12:32:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:36,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:36,776 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:36,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278372979] [2025-02-06 12:32:36,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278372979] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:36,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:36,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2025-02-06 12:32:36,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364018587] [2025-02-06 12:32:36,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:36,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 12:32:36,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:36,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 12:32:36,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2025-02-06 12:32:37,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-06 12:32:37,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 59 transitions, 432 flow. Second operand has 20 states, 20 states have (on average 23.7) internal successors, (474), 20 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:37,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:37,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-06 12:32:37,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:39,020 INFO L124 PetriNetUnfolderBase]: 48/239 cut-off events. [2025-02-06 12:32:39,020 INFO L125 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2025-02-06 12:32:39,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 239 events. 48/239 cut-off events. For 731/731 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 323 event pairs, 4 based on Foata normal form. 6/245 useless extension candidates. Maximal degree in co-relation 779. Up to 40 conditions per place. [2025-02-06 12:32:39,021 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 50 selfloop transitions, 27 changer transitions 0/94 dead transitions. [2025-02-06 12:32:39,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 94 transitions, 732 flow [2025-02-06 12:32:39,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 12:32:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-02-06 12:32:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 584 transitions. [2025-02-06 12:32:39,023 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2025-02-06 12:32:39,023 INFO L175 Difference]: Start difference. First operand has 88 places, 59 transitions, 432 flow. Second operand 24 states and 584 transitions. [2025-02-06 12:32:39,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 94 transitions, 732 flow [2025-02-06 12:32:39,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 682 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-02-06 12:32:39,027 INFO L231 Difference]: Finished difference. Result has 104 places, 64 transitions, 491 flow [2025-02-06 12:32:39,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=491, PETRI_PLACES=104, PETRI_TRANSITIONS=64} [2025-02-06 12:32:39,028 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 58 predicate places. [2025-02-06 12:32:39,028 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 64 transitions, 491 flow [2025-02-06 12:32:39,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 23.7) internal successors, (474), 20 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:39,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:39,029 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:39,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 12:32:39,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:39,229 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:39,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:39,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1167662226, now seen corresponding path program 5 times [2025-02-06 12:32:39,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:39,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265160533] [2025-02-06 12:32:39,230 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 12:32:39,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:39,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:39,232 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:39,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 12:32:39,280 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 6 equivalence classes. [2025-02-06 12:32:39,352 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 62 of 62 statements. [2025-02-06 12:32:39,352 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-06 12:32:39,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:39,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 12:32:39,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:39,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:32:39,934 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 17 treesize of output 9 [2025-02-06 12:32:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:39,943 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:40,447 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:40,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265160533] [2025-02-06 12:32:40,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265160533] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:40,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:40,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2025-02-06 12:32:40,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603562266] [2025-02-06 12:32:40,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:40,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 12:32:40,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:40,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 12:32:40,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2025-02-06 12:32:41,376 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-06 12:32:41,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 64 transitions, 491 flow. Second operand has 22 states, 22 states have (on average 23.681818181818183) internal successors, (521), 22 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:41,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:41,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-06 12:32:41,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:43,175 INFO L124 PetriNetUnfolderBase]: 51/272 cut-off events. [2025-02-06 12:32:43,176 INFO L125 PetriNetUnfolderBase]: For 1108/1108 co-relation queries the response was YES. [2025-02-06 12:32:43,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 272 events. 51/272 cut-off events. For 1108/1108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 4 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 937. Up to 45 conditions per place. [2025-02-06 12:32:43,177 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 55 selfloop transitions, 30 changer transitions 0/102 dead transitions. [2025-02-06 12:32:43,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 102 transitions, 843 flow [2025-02-06 12:32:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-06 12:32:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-02-06 12:32:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 676 transitions. [2025-02-06 12:32:43,179 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2025-02-06 12:32:43,179 INFO L175 Difference]: Start difference. First operand has 104 places, 64 transitions, 491 flow. Second operand 28 states and 676 transitions. [2025-02-06 12:32:43,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 102 transitions, 843 flow [2025-02-06 12:32:43,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 102 transitions, 806 flow, removed 2 selfloop flow, removed 16 redundant places. [2025-02-06 12:32:43,185 INFO L231 Difference]: Finished difference. Result has 121 places, 68 transitions, 588 flow [2025-02-06 12:32:43,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=588, PETRI_PLACES=121, PETRI_TRANSITIONS=68} [2025-02-06 12:32:43,186 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2025-02-06 12:32:43,186 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 68 transitions, 588 flow [2025-02-06 12:32:43,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 23.681818181818183) internal successors, (521), 22 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:43,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:43,186 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:43,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 12:32:43,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:43,387 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:43,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:43,387 INFO L85 PathProgramCache]: Analyzing trace with hash 424071320, now seen corresponding path program 3 times [2025-02-06 12:32:43,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:43,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872111003] [2025-02-06 12:32:43,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:32:43,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:43,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:43,389 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:32:43,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 12:32:43,439 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 9 equivalence classes. [2025-02-06 12:32:43,456 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 68 statements. [2025-02-06 12:32:43,456 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 12:32:43,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:43,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 12:32:43,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:43,491 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-06 12:32:43,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-06 12:32:44,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:32:44,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2025-02-06 12:32:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2025-02-06 12:32:44,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2025-02-06 12:32:45,341 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:45,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872111003] [2025-02-06 12:32:45,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872111003] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:45,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:45,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-02-06 12:32:45,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914054549] [2025-02-06 12:32:45,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:45,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 12:32:45,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:45,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 12:32:45,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2025-02-06 12:32:45,790 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-06 12:32:45,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 68 transitions, 588 flow. Second operand has 14 states, 14 states have (on average 21.285714285714285) internal successors, (298), 14 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:45,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:45,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-06 12:32:45,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:46,249 INFO L124 PetriNetUnfolderBase]: 64/277 cut-off events. [2025-02-06 12:32:46,249 INFO L125 PetriNetUnfolderBase]: For 1406/1406 co-relation queries the response was YES. [2025-02-06 12:32:46,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 277 events. 64/277 cut-off events. For 1406/1406 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 343 event pairs, 2 based on Foata normal form. 8/285 useless extension candidates. Maximal degree in co-relation 1015. Up to 110 conditions per place. [2025-02-06 12:32:46,251 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 31 selfloop transitions, 30 changer transitions 0/71 dead transitions. [2025-02-06 12:32:46,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 71 transitions, 696 flow [2025-02-06 12:32:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:32:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:32:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2025-02-06 12:32:46,253 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2025-02-06 12:32:46,253 INFO L175 Difference]: Start difference. First operand has 121 places, 68 transitions, 588 flow. Second operand 7 states and 163 transitions. [2025-02-06 12:32:46,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 71 transitions, 696 flow [2025-02-06 12:32:46,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 71 transitions, 627 flow, removed 6 selfloop flow, removed 25 redundant places. [2025-02-06 12:32:46,259 INFO L231 Difference]: Finished difference. Result has 100 places, 66 transitions, 553 flow [2025-02-06 12:32:46,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=553, PETRI_PLACES=100, PETRI_TRANSITIONS=66} [2025-02-06 12:32:46,260 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2025-02-06 12:32:46,260 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 66 transitions, 553 flow [2025-02-06 12:32:46,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.285714285714285) internal successors, (298), 14 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:46,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:46,260 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:46,268 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 12:32:46,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:46,465 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:46,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:46,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1695550766, now seen corresponding path program 6 times [2025-02-06 12:32:46,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:46,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756195578] [2025-02-06 12:32:46,466 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 12:32:46,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:46,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:46,468 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 12:32:46,468 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 12:32:46,517 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 69 statements into 7 equivalence classes. [2025-02-06 12:32:46,628 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 69 of 69 statements. [2025-02-06 12:32:46,628 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-06 12:32:46,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:46,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 12:32:46,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:46,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:32:47,334 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 17 treesize of output 9 [2025-02-06 12:32:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:47,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:47,925 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:32:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756195578] [2025-02-06 12:32:47,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756195578] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:47,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:32:47,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2025-02-06 12:32:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402269853] [2025-02-06 12:32:47,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:47,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 12:32:47,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:32:47,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 12:32:47,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-02-06 12:32:49,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-06 12:32:49,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 66 transitions, 553 flow. Second operand has 24 states, 24 states have (on average 23.708333333333332) internal successors, (569), 24 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:49,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:49,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-06 12:32:49,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:51,310 INFO L124 PetriNetUnfolderBase]: 54/293 cut-off events. [2025-02-06 12:32:51,310 INFO L125 PetriNetUnfolderBase]: For 1509/1509 co-relation queries the response was YES. [2025-02-06 12:32:51,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 293 events. 54/293 cut-off events. For 1509/1509 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 352 event pairs, 4 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 1059. Up to 50 conditions per place. [2025-02-06 12:32:51,311 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 60 selfloop transitions, 33 changer transitions 0/108 dead transitions. [2025-02-06 12:32:51,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 108 transitions, 966 flow [2025-02-06 12:32:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-06 12:32:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-02-06 12:32:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 768 transitions. [2025-02-06 12:32:51,313 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-06 12:32:51,313 INFO L175 Difference]: Start difference. First operand has 100 places, 66 transitions, 553 flow. Second operand 32 states and 768 transitions. [2025-02-06 12:32:51,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 108 transitions, 966 flow [2025-02-06 12:32:51,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 108 transitions, 928 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 12:32:51,320 INFO L231 Difference]: Finished difference. Result has 132 places, 70 transitions, 677 flow [2025-02-06 12:32:51,320 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=677, PETRI_PLACES=132, PETRI_TRANSITIONS=70} [2025-02-06 12:32:51,321 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 86 predicate places. [2025-02-06 12:32:51,321 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 70 transitions, 677 flow [2025-02-06 12:32:51,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 23.708333333333332) internal successors, (569), 24 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:32:51,321 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:51,321 INFO L206 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:51,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 12:32:51,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:51,522 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-06 12:32:51,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2082632978, now seen corresponding path program 7 times [2025-02-06 12:32:51,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:32:51,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647833678] [2025-02-06 12:32:51,523 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 12:32:51,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:51,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:51,525 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 12:32:51,525 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 12:32:51,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-06 12:32:51,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-06 12:32:51,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:51,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 12:32:51,898 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 12:32:51,918 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-06 12:32:52,013 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-06 12:32:52,013 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:52,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 12:32:52,057 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-02-06 12:32:52,057 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 12:32:52,058 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2025-02-06 12:32:52,059 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-02-06 12:32:52,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-02-06 12:32:52,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-02-06 12:32:52,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-02-06 12:32:52,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-02-06 12:32:52,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-02-06 12:32:52,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-02-06 12:32:52,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2025-02-06 12:32:52,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2025-02-06 12:32:52,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2025-02-06 12:32:52,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2025-02-06 12:32:52,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-02-06 12:32:52,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-02-06 12:32:52,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-02-06 12:32:52,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-02-06 12:32:52,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-02-06 12:32:52,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-02-06 12:32:52,074 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 12:32:52,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:52,262 INFO L422 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:52,334 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 12:32:52,334 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 12:32:52,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 12:32:52 BasicIcfg [2025-02-06 12:32:52,339 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 12:32:52,340 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 12:32:52,340 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 12:32:52,340 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 12:32:52,341 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:32:16" (3/4) ... [2025-02-06 12:32:52,343 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-02-06 12:32:52,343 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 12:32:52,344 INFO L158 Benchmark]: Toolchain (without parser) took 37357.31ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 90.4MB in the beginning and 113.6MB in the end (delta: -23.2MB). Peak memory consumption was 78.0MB. Max. memory is 16.1GB. [2025-02-06 12:32:52,345 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 83.9MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 33.6kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:32:52,345 INFO L158 Benchmark]: CACSL2BoogieTranslator took 525.28ms. Allocated memory is still 117.4MB. Free memory was 90.2MB in the beginning and 57.4MB in the end (delta: 32.8MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-02-06 12:32:52,345 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.51ms. Allocated memory is still 117.4MB. Free memory was 57.4MB in the beginning and 55.4MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:32:52,345 INFO L158 Benchmark]: Boogie Preprocessor took 53.07ms. Allocated memory is still 117.4MB. Free memory was 55.1MB in the beginning and 53.3MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 12:32:52,346 INFO L158 Benchmark]: IcfgBuilder took 584.04ms. Allocated memory is still 117.4MB. Free memory was 53.1MB in the beginning and 75.8MB in the end (delta: -22.7MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2025-02-06 12:32:52,346 INFO L158 Benchmark]: TraceAbstraction took 36127.09ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 75.1MB in the beginning and 113.6MB in the end (delta: -38.5MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2025-02-06 12:32:52,346 INFO L158 Benchmark]: Witness Printer took 3.94ms. Allocated memory is still 218.1MB. Free memory was 113.6MB in the beginning and 113.6MB in the end (delta: 19.6kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:32:52,347 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 83.9MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 33.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 525.28ms. Allocated memory is still 117.4MB. Free memory was 90.2MB in the beginning and 57.4MB in the end (delta: 32.8MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.51ms. Allocated memory is still 117.4MB. Free memory was 57.4MB in the beginning and 55.4MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.07ms. Allocated memory is still 117.4MB. Free memory was 55.1MB in the beginning and 53.3MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 584.04ms. Allocated memory is still 117.4MB. Free memory was 53.1MB in the beginning and 75.8MB in the end (delta: -22.7MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * TraceAbstraction took 36127.09ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 75.1MB in the beginning and 113.6MB in the end (delta: -38.5MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * Witness Printer took 3.94ms. Allocated memory is still 218.1MB. Free memory was 113.6MB in the beginning and 113.6MB in the end (delta: 19.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\old(arg)={0:0}, t1=-1, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, v={4:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={4:0}] [L1116] COND TRUE 2 \read(*v) [L1116] FCALL 2 strcpy(v, "Bigshot") [L1117] 2 return 0; [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={4:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={4:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, v={4:0}] [L1126] EXPR 0 v[0] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={4:0}] [L1126] CALL 0 __VERIFIER_assert(!v || v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\old(arg)={0:0}, \old(expression)=1, \result={0:0}, arg={0:0}, expression=1, v={4:0}] [L1126] RET 0 __VERIFIER_assert(!v || v[0] == 'B') [L1127] 0 return 0; VAL [\old(arg)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={4:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 65 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 35.9s, OverallIterations: 20, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 18.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3098 SdHoareTripleChecker+Valid, 12.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2737 mSDsluCounter, 2779 SdHoareTripleChecker+Invalid, 10.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2761 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10704 IncrementalHoareTripleChecker+Invalid, 10806 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 18 mSDtfsCounter, 10704 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1253 GetRequests, 938 SyntacticMatches, 3 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 8.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=677occurred in iteration=19, InterpolantAutomatonStates: 207, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 723 NumberOfCodeBlocks, 646 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1116 ConstructedInterpolants, 124 QuantifiedInterpolants, 18489 SizeOfPredicates, 102 NumberOfNonLiveVariables, 2045 ConjunctsInSsa, 202 ConjunctsInUnsatCore, 30 InterpolantComputations, 8 PerfectInterpolantSequences, 472/1472 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-02-06 12:32:52,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample