./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 48c9605d 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-?-48c9605-m [2025-02-08 08:08:20,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:08:20,574 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:08:20,581 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:08:20,581 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:08:20,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:08:20,606 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:08:20,606 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:08:20,607 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:08:20,607 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:08:20,607 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:08:20,608 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:08:20,608 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:08:20,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:08:20,608 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:08:20,608 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:08:20,608 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:08:20,608 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:08:20,608 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:08:20,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:08:20,608 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:08:20,608 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:08:20,608 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:08:20,609 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:08:20,609 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:08:20,609 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:08:20,610 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 [2025-02-08 08:08:20,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:08:20,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:08:20,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:08:20,849 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:08:20,849 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:08:20,851 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s.i [2025-02-08 08:08:22,012 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4e3e76b99/530e57812c1d4c40b9c55e8eb6b00c3c/FLAGe58156445 [2025-02-08 08:08:22,376 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:08:22,378 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2025-02-08 08:08:22,397 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4e3e76b99/530e57812c1d4c40b9c55e8eb6b00c3c/FLAGe58156445 [2025-02-08 08:08:22,605 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4e3e76b99/530e57812c1d4c40b9c55e8eb6b00c3c [2025-02-08 08:08:22,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:08:22,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:08:22,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:08:22,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:08:22,612 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:08:22,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:22,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd8873c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22, skipping insertion in model container [2025-02-08 08:08:22,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:22,633 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:08:22,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:08:22,853 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:08:22,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:08:22,931 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:08:22,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22 WrapperNode [2025-02-08 08:08:22,932 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:08:22,933 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:08:22,933 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:08:22,934 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:08:22,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:22,952 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:22,971 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2025-02-08 08:08:22,972 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:08:22,972 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:08:22,972 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:08:22,972 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:08:22,977 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:22,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:22,981 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:22,996 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 2, 9]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8]. The 1 writes are split as follows [0, 1, 0]. [2025-02-08 08:08:22,996 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:22,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:23,002 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:23,006 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:23,007 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:23,008 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:23,009 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:08:23,010 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:08:23,010 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:08:23,010 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:08:23,014 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (1/1) ... [2025-02-08 08:08:23,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:08:23,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:23,046 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) [2025-02-08 08:08:23,051 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 [2025-02-08 08:08:23,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-02-08 08:08:23,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-02-08 08:08:23,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:08:23,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:08:23,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-08 08:08:23,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:08:23,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:08:23,069 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:08:23,184 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:08:23,186 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:08:23,361 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:08:23,362 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:08:23,451 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:08:23,455 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:08:23,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:08:23 BoogieIcfgContainer [2025-02-08 08:08:23,456 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:08:23,457 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:08:23,457 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:08:23,465 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:08:23,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:08:22" (1/3) ... [2025-02-08 08:08:23,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcfb04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:08:23, skipping insertion in model container [2025-02-08 08:08:23,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:22" (2/3) ... [2025-02-08 08:08:23,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcfb04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:08:23, skipping insertion in model container [2025-02-08 08:08:23,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:08:23" (3/3) ... [2025-02-08 08:08:23,466 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2025-02-08 08:08:23,484 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:08:23,488 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. [2025-02-08 08:08:23,492 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:08:23,546 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-08 08:08:23,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2025-02-08 08:08:23,619 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2025-02-08 08:08:23,621 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:08:23,622 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 78 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. [2025-02-08 08:08:23,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2025-02-08 08:08:23,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2025-02-08 08:08:23,639 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:08:23,652 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;@5e34362d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:08:23,652 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-02-08 08:08:23,656 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:08:23,656 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2025-02-08 08:08:23,656 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:08:23,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:23,657 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:23,657 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:23,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:23,661 INFO L85 PathProgramCache]: Analyzing trace with hash -167171172, now seen corresponding path program 1 times [2025-02-08 08:08:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:23,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641563297] [2025-02-08 08:08:23,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:23,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:23,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:08:23,756 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:08:23,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:23,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:23,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:23,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641563297] [2025-02-08 08:08:23,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641563297] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:23,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:23,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:08:23,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153390592] [2025-02-08 08:08:23,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:23,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:08:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:23,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:08:23,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:08:24,009 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:08:24,011 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) [2025-02-08 08:08:24,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:24,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:08:24,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:24,073 INFO L124 PetriNetUnfolderBase]: 10/61 cut-off events. [2025-02-08 08:08:24,074 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:08:24,074 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. [2025-02-08 08:08:24,075 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 17 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2025-02-08 08:08:24,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 132 flow [2025-02-08 08:08:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:08:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:08:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2025-02-08 08:08:24,084 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2025-02-08 08:08:24,085 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 4 states and 113 transitions. [2025-02-08 08:08:24,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 132 flow [2025-02-08 08:08:24,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:08:24,091 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 88 flow [2025-02-08 08:08:24,092 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} [2025-02-08 08:08:24,094 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-08 08:08:24,096 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 88 flow [2025-02-08 08:08:24,096 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) [2025-02-08 08:08:24,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:24,096 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:24,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:08:24,097 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:24,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:24,097 INFO L85 PathProgramCache]: Analyzing trace with hash -887338854, now seen corresponding path program 1 times [2025-02-08 08:08:24,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:24,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821263645] [2025-02-08 08:08:24,098 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:24,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:24,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:08:24,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:08:24,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:24,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:24,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:24,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821263645] [2025-02-08 08:08:24,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821263645] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:24,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:24,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:08:24,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796360108] [2025-02-08 08:08:24,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:24,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:08:24,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:24,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:08:24,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:08:24,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2025-02-08 08:08:24,225 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) [2025-02-08 08:08:24,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:24,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2025-02-08 08:08:24,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:24,276 INFO L124 PetriNetUnfolderBase]: 15/78 cut-off events. [2025-02-08 08:08:24,277 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-08 08:08:24,277 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 8. Compared 189 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. [2025-02-08 08:08:24,277 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 20 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2025-02-08 08:08:24,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 146 flow [2025-02-08 08:08:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:08:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:08:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2025-02-08 08:08:24,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2025-02-08 08:08:24,280 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 88 flow. Second operand 4 states and 118 transitions. [2025-02-08 08:08:24,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 146 flow [2025-02-08 08:08:24,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 138 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:08:24,281 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 105 flow [2025-02-08 08:08:24,281 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} [2025-02-08 08:08:24,282 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2025-02-08 08:08:24,282 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 105 flow [2025-02-08 08:08:24,282 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) [2025-02-08 08:08:24,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:24,282 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:24,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:08:24,282 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:24,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1737700514, now seen corresponding path program 1 times [2025-02-08 08:08:24,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:24,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473739225] [2025-02-08 08:08:24,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:24,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:24,307 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:08:24,312 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:08:24,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:24,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:24,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:24,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473739225] [2025-02-08 08:08:24,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473739225] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:24,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:24,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:08:24,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826343315] [2025-02-08 08:08:24,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:24,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:08:24,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:24,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:08:24,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:08:24,407 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:08:24,407 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) [2025-02-08 08:08:24,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:24,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:08:24,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:24,487 INFO L124 PetriNetUnfolderBase]: 15/81 cut-off events. [2025-02-08 08:08:24,488 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-08 08:08:24,488 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 184 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. [2025-02-08 08:08:24,492 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 19 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2025-02-08 08:08:24,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 151 flow [2025-02-08 08:08:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:08:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:08:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2025-02-08 08:08:24,493 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.578125 [2025-02-08 08:08:24,493 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 105 flow. Second operand 4 states and 111 transitions. [2025-02-08 08:08:24,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 151 flow [2025-02-08 08:08:24,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:08:24,494 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 104 flow [2025-02-08 08:08:24,494 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} [2025-02-08 08:08:24,495 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-08 08:08:24,495 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 104 flow [2025-02-08 08:08:24,495 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) [2025-02-08 08:08:24,495 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:24,495 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:24,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:08:24,495 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:24,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:24,500 INFO L85 PathProgramCache]: Analyzing trace with hash 462310748, now seen corresponding path program 1 times [2025-02-08 08:08:24,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:24,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49887712] [2025-02-08 08:08:24,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:24,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:24,509 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:08:24,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:08:24,515 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:24,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:24,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:24,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49887712] [2025-02-08 08:08:24,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49887712] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:24,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:24,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:08:24,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426538670] [2025-02-08 08:08:24,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:24,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:08:24,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:24,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:08:24,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:08:24,647 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2025-02-08 08:08:24,648 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) [2025-02-08 08:08:24,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:24,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2025-02-08 08:08:24,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:24,700 INFO L124 PetriNetUnfolderBase]: 14/69 cut-off events. [2025-02-08 08:08:24,701 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-02-08 08:08:24,701 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 136 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. [2025-02-08 08:08:24,701 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 20 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2025-02-08 08:08:24,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 156 flow [2025-02-08 08:08:24,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:08:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:08:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2025-02-08 08:08:24,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2025-02-08 08:08:24,703 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 104 flow. Second operand 4 states and 118 transitions. [2025-02-08 08:08:24,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 156 flow [2025-02-08 08:08:24,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 148 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:08:24,704 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 107 flow [2025-02-08 08:08:24,704 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} [2025-02-08 08:08:24,704 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-08 08:08:24,704 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 107 flow [2025-02-08 08:08:24,705 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) [2025-02-08 08:08:24,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:24,705 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:24,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:08:24,705 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:24,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:24,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1997630836, now seen corresponding path program 1 times [2025-02-08 08:08:24,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:24,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878781944] [2025-02-08 08:08:24,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:24,711 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:08:24,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:08:24,714 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:24,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:24,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:24,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878781944] [2025-02-08 08:08:24,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878781944] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:24,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:24,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:08:24,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903408294] [2025-02-08 08:08:24,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:24,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:08:24,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:24,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:08:24,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:08:24,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:08:24,735 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) [2025-02-08 08:08:24,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:24,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:08:24,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:24,762 INFO L124 PetriNetUnfolderBase]: 12/69 cut-off events. [2025-02-08 08:08:24,762 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-02-08 08:08:24,762 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 134 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. [2025-02-08 08:08:24,763 INFO L140 encePairwiseOnDemand]: 46/48 looper letters, 20 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2025-02-08 08:08:24,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 149 flow [2025-02-08 08:08:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:08:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:08:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2025-02-08 08:08:24,764 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2025-02-08 08:08:24,764 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 107 flow. Second operand 3 states and 92 transitions. [2025-02-08 08:08:24,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 149 flow [2025-02-08 08:08:24,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 141 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:08:24,765 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 99 flow [2025-02-08 08:08:24,765 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} [2025-02-08 08:08:24,766 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2025-02-08 08:08:24,766 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 99 flow [2025-02-08 08:08:24,766 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) [2025-02-08 08:08:24,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:24,766 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:24,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:08:24,766 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:24,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:24,766 INFO L85 PathProgramCache]: Analyzing trace with hash -98102282, now seen corresponding path program 1 times [2025-02-08 08:08:24,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:24,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236325074] [2025-02-08 08:08:24,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:24,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:24,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:08:24,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:08:24,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:24,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:24,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:24,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236325074] [2025-02-08 08:08:24,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236325074] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:24,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600489230] [2025-02-08 08:08:24,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:24,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:24,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:24,923 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) [2025-02-08 08:08:24,925 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 [2025-02-08 08:08:24,968 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:08:24,983 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:08:24,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:24,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:24,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:08:24,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:25,040 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:08:25,040 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 [2025-02-08 08:08:25,045 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 [2025-02-08 08:08:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:25,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:25,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600489230] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:25,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:25,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2025-02-08 08:08:25,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003432864] [2025-02-08 08:08:25,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:25,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:08:25,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:25,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:08:25,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:08:25,661 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-08 08:08:25,661 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) [2025-02-08 08:08:25,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:25,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-08 08:08:25,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:25,827 INFO L124 PetriNetUnfolderBase]: 31/133 cut-off events. [2025-02-08 08:08:25,827 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-02-08 08:08:25,828 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. [2025-02-08 08:08:25,828 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 31 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2025-02-08 08:08:25,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 225 flow [2025-02-08 08:08:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:08:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:08:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2025-02-08 08:08:25,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2025-02-08 08:08:25,831 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 99 flow. Second operand 7 states and 181 transitions. [2025-02-08 08:08:25,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 225 flow [2025-02-08 08:08:25,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:08:25,833 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 160 flow [2025-02-08 08:08:25,833 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} [2025-02-08 08:08:25,833 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2025-02-08 08:08:25,833 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 160 flow [2025-02-08 08:08:25,833 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) [2025-02-08 08:08:25,834 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:25,834 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:25,841 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 [2025-02-08 08:08:26,039 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 [2025-02-08 08:08:26,039 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:26,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash 212993400, now seen corresponding path program 1 times [2025-02-08 08:08:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:26,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855327244] [2025-02-08 08:08:26,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:26,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:26,049 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:08:26,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:08:26,055 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:26,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:26,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:26,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855327244] [2025-02-08 08:08:26,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855327244] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:26,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263064677] [2025-02-08 08:08:26,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:26,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:26,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:26,160 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) [2025-02-08 08:08:26,162 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 [2025-02-08 08:08:26,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:08:26,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:08:26,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:26,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:26,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-08 08:08:26,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:26,229 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 [2025-02-08 08:08:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:26,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:26,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263064677] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:26,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:26,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-08 08:08:26,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139258129] [2025-02-08 08:08:26,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:26,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:08:26,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:26,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:08:26,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:08:26,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:08:26,538 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) [2025-02-08 08:08:26,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:26,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:08:26,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:26,656 INFO L124 PetriNetUnfolderBase]: 26/124 cut-off events. [2025-02-08 08:08:26,656 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-02-08 08:08:26,656 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 200 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. [2025-02-08 08:08:26,657 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 27 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2025-02-08 08:08:26,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 53 transitions, 260 flow [2025-02-08 08:08:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:08:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:08:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2025-02-08 08:08:26,658 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2025-02-08 08:08:26,658 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 160 flow. Second operand 7 states and 195 transitions. [2025-02-08 08:08:26,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 53 transitions, 260 flow [2025-02-08 08:08:26,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 244 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-02-08 08:08:26,659 INFO L231 Difference]: Finished difference. Result has 57 places, 42 transitions, 194 flow [2025-02-08 08:08:26,659 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} [2025-02-08 08:08:26,660 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2025-02-08 08:08:26,660 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 194 flow [2025-02-08 08:08:26,660 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) [2025-02-08 08:08:26,660 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:26,660 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] [2025-02-08 08:08:26,667 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 [2025-02-08 08:08:26,865 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 [2025-02-08 08:08:26,865 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:26,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1526812937, now seen corresponding path program 1 times [2025-02-08 08:08:26,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:26,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920231290] [2025-02-08 08:08:26,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:26,873 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:08:26,878 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:08:26,878 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:26,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:26,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:26,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920231290] [2025-02-08 08:08:26,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920231290] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:26,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:26,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:08:26,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800036948] [2025-02-08 08:08:26,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:26,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:08:26,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:26,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:08:26,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:08:26,915 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-08 08:08:26,915 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) [2025-02-08 08:08:26,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:26,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-08 08:08:26,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:26,983 INFO L124 PetriNetUnfolderBase]: 20/117 cut-off events. [2025-02-08 08:08:26,984 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2025-02-08 08:08:26,985 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 192 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. [2025-02-08 08:08:26,985 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 24 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2025-02-08 08:08:26,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 42 transitions, 248 flow [2025-02-08 08:08:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:08:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:08:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2025-02-08 08:08:26,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2025-02-08 08:08:26,986 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 194 flow. Second operand 4 states and 106 transitions. [2025-02-08 08:08:26,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 42 transitions, 248 flow [2025-02-08 08:08:26,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 42 transitions, 234 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:08:26,989 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 184 flow [2025-02-08 08:08:26,990 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} [2025-02-08 08:08:26,990 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2025-02-08 08:08:26,991 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 184 flow [2025-02-08 08:08:26,992 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) [2025-02-08 08:08:26,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:26,992 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] [2025-02-08 08:08:26,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:08:26,992 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:26,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash 143411199, now seen corresponding path program 1 times [2025-02-08 08:08:26,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:26,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898340003] [2025-02-08 08:08:26,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:26,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:26,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 08:08:27,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:08:27,004 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:27,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:27,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:27,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898340003] [2025-02-08 08:08:27,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898340003] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:27,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:27,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:08:27,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976149675] [2025-02-08 08:08:27,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:27,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:08:27,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:27,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:08:27,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:08:27,169 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:08:27,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 184 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) [2025-02-08 08:08:27,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:27,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:08:27,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:27,236 INFO L124 PetriNetUnfolderBase]: 21/122 cut-off events. [2025-02-08 08:08:27,236 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2025-02-08 08:08:27,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 122 events. 21/122 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 198 event pairs, 12 based on Foata normal form. 2/124 useless extension candidates. Maximal degree in co-relation 270. Up to 52 conditions per place. [2025-02-08 08:08:27,237 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2025-02-08 08:08:27,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 243 flow [2025-02-08 08:08:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:08:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:08:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2025-02-08 08:08:27,239 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2025-02-08 08:08:27,239 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 184 flow. Second operand 6 states and 170 transitions. [2025-02-08 08:08:27,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 243 flow [2025-02-08 08:08:27,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 237 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:08:27,242 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 189 flow [2025-02-08 08:08:27,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2025-02-08 08:08:27,243 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2025-02-08 08:08:27,243 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 189 flow [2025-02-08 08:08:27,243 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) [2025-02-08 08:08:27,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:27,243 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] [2025-02-08 08:08:27,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:08:27,244 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:27,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2095634487, now seen corresponding path program 1 times [2025-02-08 08:08:27,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:27,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552829951] [2025-02-08 08:08:27,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:27,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:27,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-08 08:08:27,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 08:08:27,255 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:27,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:27,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:27,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552829951] [2025-02-08 08:08:27,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552829951] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:27,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52441485] [2025-02-08 08:08:27,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:27,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:27,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:27,389 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) [2025-02-08 08:08:27,390 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 [2025-02-08 08:08:27,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-08 08:08:27,490 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 08:08:27,490 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:27,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:27,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-08 08:08:27,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:27,669 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 [2025-02-08 08:08:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:27,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:27,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52441485] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:27,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:27,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-02-08 08:08:27,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145132556] [2025-02-08 08:08:27,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:27,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:08:27,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:27,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:08:27,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:08:27,860 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:08:27,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 189 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) [2025-02-08 08:08:27,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:27,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:08:27,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:27,976 INFO L124 PetriNetUnfolderBase]: 18/117 cut-off events. [2025-02-08 08:08:27,977 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2025-02-08 08:08:27,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 117 events. 18/117 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 192 event pairs, 9 based on Foata normal form. 2/119 useless extension candidates. Maximal degree in co-relation 266. Up to 41 conditions per place. [2025-02-08 08:08:27,977 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2025-02-08 08:08:27,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 46 transitions, 252 flow [2025-02-08 08:08:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:08:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:08:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2025-02-08 08:08:27,978 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2025-02-08 08:08:27,978 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 189 flow. Second operand 7 states and 197 transitions. [2025-02-08 08:08:27,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 46 transitions, 252 flow [2025-02-08 08:08:27,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 46 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:08:27,980 INFO L231 Difference]: Finished difference. Result has 64 places, 42 transitions, 201 flow [2025-02-08 08:08:27,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=56, 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=201, PETRI_PLACES=64, PETRI_TRANSITIONS=42} [2025-02-08 08:08:27,980 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2025-02-08 08:08:27,980 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 42 transitions, 201 flow [2025-02-08 08:08:27,980 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) [2025-02-08 08:08:27,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:27,981 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:27,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 08:08:28,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:28,186 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:28,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:28,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1875326426, now seen corresponding path program 2 times [2025-02-08 08:08:28,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:28,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731763275] [2025-02-08 08:08:28,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:08:28,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:28,196 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-02-08 08:08:28,202 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-08 08:08:28,202 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:08:28,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:28,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731763275] [2025-02-08 08:08:28,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731763275] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490568933] [2025-02-08 08:08:28,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:08:28,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:28,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:28,372 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) [2025-02-08 08:08:28,374 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 [2025-02-08 08:08:28,414 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-02-08 08:08:28,432 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-08 08:08:28,433 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:08:28,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:28,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-08 08:08:28,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:28,457 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:08:28,458 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 [2025-02-08 08:08:28,461 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 [2025-02-08 08:08:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:28,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:28,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490568933] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:28,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:28,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2025-02-08 08:08:28,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613188572] [2025-02-08 08:08:28,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:28,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:08:28,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:28,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:08:28,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:08:29,387 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-08 08:08:29,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 42 transitions, 201 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) [2025-02-08 08:08:29,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:29,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-08 08:08:29,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:29,726 INFO L124 PetriNetUnfolderBase]: 50/214 cut-off events. [2025-02-08 08:08:29,726 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2025-02-08 08:08:29,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639 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 328 event pairs, 6 based on Foata normal form. 8/221 useless extension candidates. Maximal degree in co-relation 603. Up to 40 conditions per place. [2025-02-08 08:08:29,727 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 47 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2025-02-08 08:08:29,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 489 flow [2025-02-08 08:08:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 08:08:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 08:08:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2025-02-08 08:08:29,729 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5246212121212122 [2025-02-08 08:08:29,729 INFO L175 Difference]: Start difference. First operand has 64 places, 42 transitions, 201 flow. Second operand 11 states and 277 transitions. [2025-02-08 08:08:29,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 489 flow [2025-02-08 08:08:29,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 477 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-08 08:08:29,731 INFO L231 Difference]: Finished difference. Result has 74 places, 51 transitions, 333 flow [2025-02-08 08:08:29,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=333, PETRI_PLACES=74, PETRI_TRANSITIONS=51} [2025-02-08 08:08:29,732 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 28 predicate places. [2025-02-08 08:08:29,732 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 51 transitions, 333 flow [2025-02-08 08:08:29,732 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) [2025-02-08 08:08:29,732 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:29,732 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] [2025-02-08 08:08:29,739 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 [2025-02-08 08:08:29,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-08 08:08:29,934 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:29,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1203228801, now seen corresponding path program 2 times [2025-02-08 08:08:29,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:29,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542359496] [2025-02-08 08:08:29,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:08:29,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:29,941 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-08 08:08:29,952 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-08 08:08:29,952 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:08:29,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:30,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:30,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542359496] [2025-02-08 08:08:30,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542359496] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:30,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998417967] [2025-02-08 08:08:30,096 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:08:30,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:30,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:30,099 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) [2025-02-08 08:08:30,101 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 [2025-02-08 08:08:30,140 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-08 08:08:30,157 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-08 08:08:30,157 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:08:30,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:30,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-08 08:08:30,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:30,313 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 [2025-02-08 08:08:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:30,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:30,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998417967] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:30,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:30,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-02-08 08:08:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464788058] [2025-02-08 08:08:30,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:30,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 08:08:30,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:30,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 08:08:30,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:08:30,584 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:08:30,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 51 transitions, 333 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) [2025-02-08 08:08:30,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:30,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:08:30,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:30,753 INFO L124 PetriNetUnfolderBase]: 35/198 cut-off events. [2025-02-08 08:08:30,753 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2025-02-08 08:08:30,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 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 308 event pairs, 18 based on Foata normal form. 2/200 useless extension candidates. Maximal degree in co-relation 588. Up to 74 conditions per place. [2025-02-08 08:08:30,754 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2025-02-08 08:08:30,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 56 transitions, 415 flow [2025-02-08 08:08:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:08:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:08:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2025-02-08 08:08:30,755 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-02-08 08:08:30,755 INFO L175 Difference]: Start difference. First operand has 74 places, 51 transitions, 333 flow. Second operand 8 states and 224 transitions. [2025-02-08 08:08:30,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 56 transitions, 415 flow [2025-02-08 08:08:30,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 56 transitions, 408 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:08:30,757 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 342 flow [2025-02-08 08:08:30,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=342, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2025-02-08 08:08:30,758 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2025-02-08 08:08:30,758 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 342 flow [2025-02-08 08:08:30,758 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) [2025-02-08 08:08:30,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:30,759 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:30,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 08:08:30,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-08 08:08:30,963 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:30,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:30,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1697563044, now seen corresponding path program 2 times [2025-02-08 08:08:30,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:30,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229927014] [2025-02-08 08:08:30,965 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:08:30,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:30,970 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-08 08:08:30,974 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 42 statements. [2025-02-08 08:08:30,974 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:08:30,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-08 08:08:31,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229927014] [2025-02-08 08:08:31,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229927014] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739591038] [2025-02-08 08:08:31,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:08:31,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:31,069 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) [2025-02-08 08:08:31,070 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 [2025-02-08 08:08:31,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-08 08:08:31,118 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 42 statements. [2025-02-08 08:08:31,118 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:08:31,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:31,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:08:31,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:31,143 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:08:31,144 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 [2025-02-08 08:08:31,152 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 [2025-02-08 08:08:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-08 08:08:31,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-08 08:08:31,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739591038] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:31,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:31,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-02-08 08:08:31,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93322369] [2025-02-08 08:08:31,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:31,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:08:31,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:31,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:08:31,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:08:32,026 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-08 08:08:32,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 342 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) [2025-02-08 08:08:32,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:32,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-08 08:08:32,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:32,164 INFO L124 PetriNetUnfolderBase]: 55/210 cut-off events. [2025-02-08 08:08:32,164 INFO L125 PetriNetUnfolderBase]: For 611/611 co-relation queries the response was YES. [2025-02-08 08:08:32,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 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 289 event pairs, 2 based on Foata normal form. 8/218 useless extension candidates. Maximal degree in co-relation 658. Up to 80 conditions per place. [2025-02-08 08:08:32,165 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 25 selfloop transitions, 19 changer transitions 0/55 dead transitions. [2025-02-08 08:08:32,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 55 transitions, 432 flow [2025-02-08 08:08:32,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:08:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:08:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2025-02-08 08:08:32,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2025-02-08 08:08:32,167 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 342 flow. Second operand 6 states and 141 transitions. [2025-02-08 08:08:32,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 55 transitions, 432 flow [2025-02-08 08:08:32,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 55 transitions, 398 flow, removed 2 selfloop flow, removed 10 redundant places. [2025-02-08 08:08:32,169 INFO L231 Difference]: Finished difference. Result has 74 places, 51 transitions, 353 flow [2025-02-08 08:08:32,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=68, 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=353, PETRI_PLACES=74, PETRI_TRANSITIONS=51} [2025-02-08 08:08:32,170 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 28 predicate places. [2025-02-08 08:08:32,170 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 51 transitions, 353 flow [2025-02-08 08:08:32,170 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) [2025-02-08 08:08:32,170 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:32,170 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] [2025-02-08 08:08:32,187 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 [2025-02-08 08:08:32,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-08 08:08:32,371 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:32,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:32,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1116846621, now seen corresponding path program 3 times [2025-02-08 08:08:32,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:32,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916276908] [2025-02-08 08:08:32,371 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:08:32,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:32,379 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 4 equivalence classes. [2025-02-08 08:08:32,397 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 48 of 48 statements. [2025-02-08 08:08:32,397 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-08 08:08:32,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:32,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916276908] [2025-02-08 08:08:32,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916276908] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179782464] [2025-02-08 08:08:32,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:08:32,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:32,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:32,584 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) [2025-02-08 08:08:32,586 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 [2025-02-08 08:08:32,630 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 4 equivalence classes. [2025-02-08 08:08:32,661 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 48 of 48 statements. [2025-02-08 08:08:32,661 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-08 08:08:32,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:32,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-08 08:08:32,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:32,849 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 [2025-02-08 08:08:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:32,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:32,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179782464] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:32,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:32,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-02-08 08:08:32,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488087743] [2025-02-08 08:08:32,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:32,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 08:08:32,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:32,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 08:08:32,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:08:33,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:08:33,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 51 transitions, 353 flow. Second operand has 20 states, 20 states have (on average 26.75) internal successors, (535), 20 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:08:33,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:33,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:08:33,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:33,405 INFO L124 PetriNetUnfolderBase]: 32/185 cut-off events. [2025-02-08 08:08:33,406 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2025-02-08 08:08:33,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 185 events. 32/185 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 258 event pairs, 15 based on Foata normal form. 2/187 useless extension candidates. Maximal degree in co-relation 572. Up to 63 conditions per place. [2025-02-08 08:08:33,407 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2025-02-08 08:08:33,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 57 transitions, 440 flow [2025-02-08 08:08:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:08:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:08:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2025-02-08 08:08:33,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5810185185185185 [2025-02-08 08:08:33,408 INFO L175 Difference]: Start difference. First operand has 74 places, 51 transitions, 353 flow. Second operand 9 states and 251 transitions. [2025-02-08 08:08:33,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 57 transitions, 440 flow [2025-02-08 08:08:33,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 57 transitions, 415 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:08:33,411 INFO L231 Difference]: Finished difference. Result has 80 places, 51 transitions, 347 flow [2025-02-08 08:08:33,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=80, PETRI_TRANSITIONS=51} [2025-02-08 08:08:33,412 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2025-02-08 08:08:33,412 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 51 transitions, 347 flow [2025-02-08 08:08:33,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 26.75) internal successors, (535), 20 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:08:33,412 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:33,412 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] [2025-02-08 08:08:33,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-08 08:08:33,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:33,613 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:33,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1574780435, now seen corresponding path program 4 times [2025-02-08 08:08:33,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:33,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847904413] [2025-02-08 08:08:33,614 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:08:33,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:33,622 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-08 08:08:33,634 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-02-08 08:08:33,635 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:08:33,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:33,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:33,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847904413] [2025-02-08 08:08:33,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847904413] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:33,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994888625] [2025-02-08 08:08:33,816 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:08:33,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:33,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:33,818 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) [2025-02-08 08:08:33,821 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 [2025-02-08 08:08:33,861 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-08 08:08:33,890 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-02-08 08:08:33,890 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:08:33,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:33,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:08:33,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:34,139 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 [2025-02-08 08:08:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:34,148 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994888625] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:34,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:34,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2025-02-08 08:08:34,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100103502] [2025-02-08 08:08:34,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:34,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 08:08:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:34,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 08:08:34,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2025-02-08 08:08:34,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:08:34,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 51 transitions, 347 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) [2025-02-08 08:08:34,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:34,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:08:34,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:34,853 INFO L124 PetriNetUnfolderBase]: 29/180 cut-off events. [2025-02-08 08:08:34,853 INFO L125 PetriNetUnfolderBase]: For 595/595 co-relation queries the response was YES. [2025-02-08 08:08:34,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 180 events. 29/180 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 248 event pairs, 12 based on Foata normal form. 2/182 useless extension candidates. Maximal degree in co-relation 550. Up to 52 conditions per place. [2025-02-08 08:08:34,854 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2025-02-08 08:08:34,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 58 transitions, 441 flow [2025-02-08 08:08:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:08:34,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:08:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2025-02-08 08:08:34,857 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2025-02-08 08:08:34,857 INFO L175 Difference]: Start difference. First operand has 80 places, 51 transitions, 347 flow. Second operand 10 states and 278 transitions. [2025-02-08 08:08:34,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 58 transitions, 441 flow [2025-02-08 08:08:34,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 58 transitions, 421 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-08 08:08:34,861 INFO L231 Difference]: Finished difference. Result has 84 places, 51 transitions, 351 flow [2025-02-08 08:08:34,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=351, PETRI_PLACES=84, PETRI_TRANSITIONS=51} [2025-02-08 08:08:34,863 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 38 predicate places. [2025-02-08 08:08:34,863 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 351 flow [2025-02-08 08:08:34,863 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) [2025-02-08 08:08:34,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:34,863 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] [2025-02-08 08:08:34,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 08:08:35,067 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,SelfDestructingSolverStorable14 [2025-02-08 08:08:35,067 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:35,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:35,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1566201207, now seen corresponding path program 5 times [2025-02-08 08:08:35,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:35,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317944251] [2025-02-08 08:08:35,068 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:08:35,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:35,076 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 6 equivalence classes. [2025-02-08 08:08:35,085 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 62 of 62 statements. [2025-02-08 08:08:35,085 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-08 08:08:35,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:35,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:35,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317944251] [2025-02-08 08:08:35,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317944251] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:35,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274251453] [2025-02-08 08:08:35,353 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:08:35,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:35,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:35,356 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) [2025-02-08 08:08:35,356 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 [2025-02-08 08:08:35,405 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 6 equivalence classes. [2025-02-08 08:08:35,432 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 62 of 62 statements. [2025-02-08 08:08:35,433 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-08 08:08:35,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:35,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 08:08:35,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:35,708 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 [2025-02-08 08:08:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:35,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:35,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274251453] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:35,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:35,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-02-08 08:08:35,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586664557] [2025-02-08 08:08:35,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:35,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-08 08:08:35,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:35,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-08 08:08:35,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-02-08 08:08:36,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:08:36,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 351 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) [2025-02-08 08:08:36,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:36,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:08:36,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:36,752 INFO L124 PetriNetUnfolderBase]: 26/175 cut-off events. [2025-02-08 08:08:36,752 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2025-02-08 08:08:36,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 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 235 event pairs, 9 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 532. Up to 41 conditions per place. [2025-02-08 08:08:36,753 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2025-02-08 08:08:36,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 59 transitions, 451 flow [2025-02-08 08:08:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 08:08:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 08:08:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2025-02-08 08:08:36,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5776515151515151 [2025-02-08 08:08:36,754 INFO L175 Difference]: Start difference. First operand has 84 places, 51 transitions, 351 flow. Second operand 11 states and 305 transitions. [2025-02-08 08:08:36,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 59 transitions, 451 flow [2025-02-08 08:08:36,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 59 transitions, 427 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-02-08 08:08:36,757 INFO L231 Difference]: Finished difference. Result has 88 places, 51 transitions, 355 flow [2025-02-08 08:08:36,757 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=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=355, PETRI_PLACES=88, PETRI_TRANSITIONS=51} [2025-02-08 08:08:36,757 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2025-02-08 08:08:36,757 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 51 transitions, 355 flow [2025-02-08 08:08:36,758 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) [2025-02-08 08:08:36,758 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:36,758 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:36,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-08 08:08:36,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:36,959 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:36,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:36,959 INFO L85 PathProgramCache]: Analyzing trace with hash -783358246, now seen corresponding path program 3 times [2025-02-08 08:08:36,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:36,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786898327] [2025-02-08 08:08:36,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:08:36,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:36,965 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 9 equivalence classes. [2025-02-08 08:08:36,968 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 68 statements. [2025-02-08 08:08:36,968 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:08:36,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-08 08:08:37,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:37,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786898327] [2025-02-08 08:08:37,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786898327] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:37,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287699134] [2025-02-08 08:08:37,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:08:37,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:37,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:37,143 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) [2025-02-08 08:08:37,144 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 [2025-02-08 08:08:37,185 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 9 equivalence classes. [2025-02-08 08:08:37,197 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 68 statements. [2025-02-08 08:08:37,197 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:08:37,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:37,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-08 08:08:37,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:37,248 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:08:37,248 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 [2025-02-08 08:08:37,256 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 [2025-02-08 08:08:38,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:08:38,117 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 [2025-02-08 08:08:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-08 08:08:38,211 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-08 08:08:39,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287699134] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:39,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:39,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2025-02-08 08:08:39,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334127924] [2025-02-08 08:08:39,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:39,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-08 08:08:39,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:39,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-08 08:08:39,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2025-02-08 08:08:39,551 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-08 08:08:39,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 51 transitions, 355 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) [2025-02-08 08:08:39,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:39,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-08 08:08:39,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:39,961 INFO L124 PetriNetUnfolderBase]: 51/198 cut-off events. [2025-02-08 08:08:39,961 INFO L125 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2025-02-08 08:08:39,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 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 250 event pairs, 2 based on Foata normal form. 2/200 useless extension candidates. Maximal degree in co-relation 622. Up to 71 conditions per place. [2025-02-08 08:08:39,962 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 26 selfloop transitions, 23 changer transitions 0/58 dead transitions. [2025-02-08 08:08:39,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 58 transitions, 453 flow [2025-02-08 08:08:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:08:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:08:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2025-02-08 08:08:39,963 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2025-02-08 08:08:39,963 INFO L175 Difference]: Start difference. First operand has 88 places, 51 transitions, 355 flow. Second operand 9 states and 205 transitions. [2025-02-08 08:08:39,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 58 transitions, 453 flow [2025-02-08 08:08:39,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 58 transitions, 398 flow, removed 5 selfloop flow, removed 17 redundant places. [2025-02-08 08:08:39,966 INFO L231 Difference]: Finished difference. Result has 78 places, 51 transitions, 332 flow [2025-02-08 08:08:39,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=332, PETRI_PLACES=78, PETRI_TRANSITIONS=51} [2025-02-08 08:08:39,966 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2025-02-08 08:08:39,966 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 51 transitions, 332 flow [2025-02-08 08:08:39,967 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) [2025-02-08 08:08:39,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:39,967 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] [2025-02-08 08:08:39,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-08 08:08:40,171 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,SelfDestructingSolverStorable16 [2025-02-08 08:08:40,171 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:40,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2018075009, now seen corresponding path program 6 times [2025-02-08 08:08:40,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:40,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658909440] [2025-02-08 08:08:40,172 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:08:40,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:40,178 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 69 statements into 7 equivalence classes. [2025-02-08 08:08:40,189 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 69 of 69 statements. [2025-02-08 08:08:40,189 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-08 08:08:40,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:40,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:08:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658909440] [2025-02-08 08:08:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658909440] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:08:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769435083] [2025-02-08 08:08:40,472 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:08:40,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:40,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:40,474 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) [2025-02-08 08:08:40,476 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 [2025-02-08 08:08:40,519 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 69 statements into 7 equivalence classes. [2025-02-08 08:08:40,562 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 69 of 69 statements. [2025-02-08 08:08:40,563 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-08 08:08:40,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:40,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-08 08:08:40,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:40,940 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 [2025-02-08 08:08:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:40,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:41,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769435083] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:41,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:08:41,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2025-02-08 08:08:41,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697042971] [2025-02-08 08:08:41,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:41,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-08 08:08:41,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:08:41,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-08 08:08:41,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2025-02-08 08:08:41,664 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:08:41,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 51 transitions, 332 flow. Second operand has 29 states, 29 states have (on average 26.517241379310345) internal successors, (769), 29 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:08:41,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:41,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:08:41,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:42,002 INFO L124 PetriNetUnfolderBase]: 23/174 cut-off events. [2025-02-08 08:08:42,002 INFO L125 PetriNetUnfolderBase]: For 437/437 co-relation queries the response was YES. [2025-02-08 08:08:42,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 174 events. 23/174 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 196 event pairs, 6 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 514. Up to 32 conditions per place. [2025-02-08 08:08:42,003 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2025-02-08 08:08:42,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 60 transitions, 440 flow [2025-02-08 08:08:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-08 08:08:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-08 08:08:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 332 transitions. [2025-02-08 08:08:42,004 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2025-02-08 08:08:42,004 INFO L175 Difference]: Start difference. First operand has 78 places, 51 transitions, 332 flow. Second operand 12 states and 332 transitions. [2025-02-08 08:08:42,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 60 transitions, 440 flow [2025-02-08 08:08:42,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 60 transitions, 430 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-08 08:08:42,006 INFO L231 Difference]: Finished difference. Result has 87 places, 51 transitions, 356 flow [2025-02-08 08:08:42,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=356, PETRI_PLACES=87, PETRI_TRANSITIONS=51} [2025-02-08 08:08:42,007 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2025-02-08 08:08:42,007 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 51 transitions, 356 flow [2025-02-08 08:08:42,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 26.517241379310345) internal successors, (769), 29 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:08:42,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:42,007 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] [2025-02-08 08:08:42,014 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 [2025-02-08 08:08:42,212 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,SelfDestructingSolverStorable17 [2025-02-08 08:08:42,212 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:42,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:42,213 INFO L85 PathProgramCache]: Analyzing trace with hash 333152695, now seen corresponding path program 7 times [2025-02-08 08:08:42,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:08:42,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87870819] [2025-02-08 08:08:42,213 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 08:08:42,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:08:42,218 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-08 08:08:42,224 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-08 08:08:42,224 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:42,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:08:42,224 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:08:42,226 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-08 08:08:42,238 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-08 08:08:42,240 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:42,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:08:42,269 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 08:08:42,270 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:08:42,271 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2025-02-08 08:08:42,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-02-08 08:08:42,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-02-08 08:08:42,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-02-08 08:08:42,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-02-08 08:08:42,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-02-08 08:08:42,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-02-08 08:08:42,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-02-08 08:08:42,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2025-02-08 08:08:42,273 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2025-02-08 08:08:42,273 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2025-02-08 08:08:42,273 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2025-02-08 08:08:42,273 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-02-08 08:08:42,273 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-02-08 08:08:42,274 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-02-08 08:08:42,274 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-02-08 08:08:42,274 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-02-08 08:08:42,274 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-02-08 08:08:42,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-02-08 08:08:42,275 INFO L422 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:42,327 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-08 08:08:42,328 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 08:08:42,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 08:08:42 BasicIcfg [2025-02-08 08:08:42,333 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 08:08:42,334 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 08:08:42,334 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 08:08:42,334 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 08:08:42,334 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:08:23" (3/4) ... [2025-02-08 08:08:42,336 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-02-08 08:08:42,336 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 08:08:42,337 INFO L158 Benchmark]: Toolchain (without parser) took 19728.82ms. Allocated memory was 142.6MB in the beginning and 335.5MB in the end (delta: 192.9MB). Free memory was 111.0MB in the beginning and 215.6MB in the end (delta: -104.6MB). Peak memory consumption was 90.2MB. Max. memory is 16.1GB. [2025-02-08 08:08:42,337 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 226.5MB. Free memory is still 147.4MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:08:42,337 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.35ms. Allocated memory is still 142.6MB. Free memory was 110.5MB in the beginning and 78.9MB in the end (delta: 31.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-02-08 08:08:42,338 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.63ms. Allocated memory is still 142.6MB. Free memory was 78.9MB in the beginning and 76.7MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:08:42,338 INFO L158 Benchmark]: Boogie Preprocessor took 37.14ms. Allocated memory is still 142.6MB. Free memory was 76.7MB in the beginning and 75.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:08:42,338 INFO L158 Benchmark]: IcfgBuilder took 446.30ms. Allocated memory is still 142.6MB. Free memory was 75.1MB in the beginning and 51.5MB in the end (delta: 23.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-02-08 08:08:42,338 INFO L158 Benchmark]: TraceAbstraction took 18875.90ms. Allocated memory was 142.6MB in the beginning and 335.5MB in the end (delta: 192.9MB). Free memory was 50.5MB in the beginning and 215.7MB in the end (delta: -165.2MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2025-02-08 08:08:42,339 INFO L158 Benchmark]: Witness Printer took 2.40ms. Allocated memory is still 335.5MB. Free memory was 215.7MB in the beginning and 215.6MB in the end (delta: 45.0kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:08:42,340 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 226.5MB. Free memory is still 147.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.35ms. Allocated memory is still 142.6MB. Free memory was 110.5MB in the beginning and 78.9MB in the end (delta: 31.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.63ms. Allocated memory is still 142.6MB. Free memory was 78.9MB in the beginning and 76.7MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.14ms. Allocated memory is still 142.6MB. Free memory was 76.7MB in the beginning and 75.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 446.30ms. Allocated memory is still 142.6MB. Free memory was 75.1MB in the beginning and 51.5MB in the end (delta: 23.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 18875.90ms. Allocated memory was 142.6MB in the beginning and 335.5MB in the end (delta: 192.9MB). Free memory was 50.5MB in the beginning and 215.7MB in the end (delta: -165.2MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Witness Printer took 2.40ms. Allocated memory is still 335.5MB. Free memory was 215.7MB in the beginning and 215.6MB in the end (delta: 45.0kB). 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: 18.7s, OverallIterations: 19, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2659 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2364 mSDsluCounter, 2140 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2111 mSDsCounter, 56 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12671 IncrementalHoareTripleChecker+Invalid, 12727 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 56 mSolverCounterUnsat, 29 mSDtfsCounter, 12671 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1139 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=356occurred in iteration=18, InterpolantAutomatonStates: 126, 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, 0.4s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 1195 NumberOfCodeBlocks, 1041 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 1578 ConstructedInterpolants, 74 QuantifiedInterpolants, 21348 SizeOfPredicates, 42 NumberOfNonLiveVariables, 2218 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 40 InterpolantComputations, 7 PerfectInterpolantSequences, 680/2208 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 [2025-02-08 08:08:42,357 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 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-?-48c9605-m [2025-02-08 08:08:44,487 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:08:44,603 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-02-08 08:08:44,611 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:08:44,611 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:08:44,646 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:08:44,646 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:08:44,646 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:08:44,646 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:08:44,646 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:08:44,647 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:08:44,647 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:08:44,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:08:44,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:08:44,648 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:08:44,649 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:08:44,649 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:08:44,650 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:08:44,650 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:08:44,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:08:44,650 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 [2025-02-08 08:08:44,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:08:44,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:08:44,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:08:44,904 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:08:44,904 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:08:44,905 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s.i [2025-02-08 08:08:46,155 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/04c8c36fb/8fad6caafe724c3e908caf8b3edd6fb9/FLAG43c429fb6 [2025-02-08 08:08:46,382 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:08:46,382 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2025-02-08 08:08:46,392 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/04c8c36fb/8fad6caafe724c3e908caf8b3edd6fb9/FLAG43c429fb6 [2025-02-08 08:08:46,402 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/04c8c36fb/8fad6caafe724c3e908caf8b3edd6fb9 [2025-02-08 08:08:46,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:08:46,405 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:08:46,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:08:46,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:08:46,409 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:08:46,409 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,410 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27914ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46, skipping insertion in model container [2025-02-08 08:08:46,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,428 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:08:46,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:08:46,737 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:08:46,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:08:46,837 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:08:46,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46 WrapperNode [2025-02-08 08:08:46,838 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:08:46,839 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:08:46,839 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:08:46,840 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:08:46,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,880 INFO L138 Inliner]: procedures = 323, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 68 [2025-02-08 08:08:46,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:08:46,881 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:08:46,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:08:46,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:08:46,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,889 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,908 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]. [2025-02-08 08:08:46,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,917 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,922 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,923 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,924 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,925 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:08:46,930 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:08:46,930 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:08:46,930 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:08:46,931 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (1/1) ... [2025-02-08 08:08:46,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:08:46,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:46,965 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) [2025-02-08 08:08:46,970 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 [2025-02-08 08:08:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2025-02-08 08:08:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2025-02-08 08:08:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2025-02-08 08:08:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-02-08 08:08:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-02-08 08:08:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-02-08 08:08:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:08:46,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:08:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:08:46,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:08:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2025-02-08 08:08:46,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2025-02-08 08:08:46,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2025-02-08 08:08:46,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:08:46,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:08:46,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:08:46,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:08:46,993 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:08:47,103 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:08:47,108 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:08:47,263 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:08:47,263 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:08:47,345 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:08:47,345 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:08:47,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:08:47 BoogieIcfgContainer [2025-02-08 08:08:47,346 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:08:47,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:08:47,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:08:47,351 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:08:47,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:08:46" (1/3) ... [2025-02-08 08:08:47,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71733b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:08:47, skipping insertion in model container [2025-02-08 08:08:47,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:08:46" (2/3) ... [2025-02-08 08:08:47,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71733b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:08:47, skipping insertion in model container [2025-02-08 08:08:47,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:08:47" (3/3) ... [2025-02-08 08:08:47,352 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2025-02-08 08:08:47,362 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:08:47,363 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. [2025-02-08 08:08:47,363 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:08:47,398 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-08 08:08:47,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2025-02-08 08:08:47,457 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2025-02-08 08:08:47,460 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:08:47,462 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 78 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. [2025-02-08 08:08:47,463 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2025-02-08 08:08:47,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2025-02-08 08:08:47,475 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:08:47,483 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;@42fd7ca7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:08:47,484 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-02-08 08:08:47,488 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:08:47,488 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2025-02-08 08:08:47,488 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:08:47,488 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:47,489 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:47,489 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:47,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:47,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1845752414, now seen corresponding path program 1 times [2025-02-08 08:08:47,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:47,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945604390] [2025-02-08 08:08:47,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:47,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:47,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:47,501 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) [2025-02-08 08:08:47,503 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 [2025-02-08 08:08:47,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:08:47,574 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:08:47,574 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:47,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:47,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 08:08:47,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:47,643 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-02-08 08:08:47,643 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 [2025-02-08 08:08:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:47,687 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:08:47,687 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:47,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945604390] [2025-02-08 08:08:47,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945604390] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:47,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:47,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:08:47,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59526980] [2025-02-08 08:08:47,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:47,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:08:47,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:47,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:08:47,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:08:47,774 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2025-02-08 08:08:47,776 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) [2025-02-08 08:08:47,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:47,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2025-02-08 08:08:47,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:47,827 INFO L124 PetriNetUnfolderBase]: 9/60 cut-off events. [2025-02-08 08:08:47,827 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:08:47,828 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. [2025-02-08 08:08:47,829 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 16 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2025-02-08 08:08:47,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 130 flow [2025-02-08 08:08:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:08:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:08:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-02-08 08:08:47,848 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-02-08 08:08:47,850 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 4 states and 116 transitions. [2025-02-08 08:08:47,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 130 flow [2025-02-08 08:08:47,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 122 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:08:47,858 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 88 flow [2025-02-08 08:08:47,860 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} [2025-02-08 08:08:47,862 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-08 08:08:47,862 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 88 flow [2025-02-08 08:08:47,863 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) [2025-02-08 08:08:47,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:47,863 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:47,870 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 [2025-02-08 08:08:48,067 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 [2025-02-08 08:08:48,067 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:48,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:48,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1383750170, now seen corresponding path program 1 times [2025-02-08 08:08:48,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:48,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610255057] [2025-02-08 08:08:48,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:48,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:48,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:48,071 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) [2025-02-08 08:08:48,072 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 [2025-02-08 08:08:48,137 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:08:48,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:08:48,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:48,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:48,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:08:48,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:08:48,190 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 [2025-02-08 08:08:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:48,267 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:08:48,267 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:48,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610255057] [2025-02-08 08:08:48,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610255057] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:48,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:48,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:08:48,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467183287] [2025-02-08 08:08:48,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:48,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:08:48,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:48,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:08:48,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:08:48,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:08:48,329 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) [2025-02-08 08:08:48,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:48,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:08:48,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:48,396 INFO L124 PetriNetUnfolderBase]: 17/81 cut-off events. [2025-02-08 08:08:48,396 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-08 08:08:48,397 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 7. Compared 196 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. [2025-02-08 08:08:48,397 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 22 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2025-02-08 08:08:48,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 152 flow [2025-02-08 08:08:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:08:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:08:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-02-08 08:08:48,398 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-02-08 08:08:48,398 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 88 flow. Second operand 4 states and 116 transitions. [2025-02-08 08:08:48,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 152 flow [2025-02-08 08:08:48,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 144 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:08:48,400 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 105 flow [2025-02-08 08:08:48,400 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} [2025-02-08 08:08:48,401 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2025-02-08 08:08:48,401 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 105 flow [2025-02-08 08:08:48,401 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) [2025-02-08 08:08:48,401 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:48,401 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:48,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 08:08:48,605 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 [2025-02-08 08:08:48,605 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:48,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:48,606 INFO L85 PathProgramCache]: Analyzing trace with hash -53417504, now seen corresponding path program 1 times [2025-02-08 08:08:48,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:48,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701706143] [2025-02-08 08:08:48,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:48,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:48,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:48,609 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) [2025-02-08 08:08:48,611 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 [2025-02-08 08:08:48,654 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:08:48,663 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:08:48,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:48,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:48,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 08:08:48,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:48,668 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 [2025-02-08 08:08:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:48,702 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:08:48,702 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:48,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701706143] [2025-02-08 08:08:48,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701706143] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:48,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:48,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:08:48,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245100237] [2025-02-08 08:08:48,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:48,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:08:48,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:48,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:08:48,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:08:48,726 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:08:48,727 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) [2025-02-08 08:08:48,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:48,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:08:48,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:48,783 INFO L124 PetriNetUnfolderBase]: 15/81 cut-off events. [2025-02-08 08:08:48,784 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-08 08:08:48,784 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. [2025-02-08 08:08:48,784 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 19 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2025-02-08 08:08:48,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 151 flow [2025-02-08 08:08:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:08:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:08:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2025-02-08 08:08:48,786 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.578125 [2025-02-08 08:08:48,786 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 105 flow. Second operand 4 states and 111 transitions. [2025-02-08 08:08:48,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 151 flow [2025-02-08 08:08:48,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:08:48,787 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 104 flow [2025-02-08 08:08:48,787 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} [2025-02-08 08:08:48,787 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-08 08:08:48,787 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 104 flow [2025-02-08 08:08:48,788 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) [2025-02-08 08:08:48,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:48,788 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:48,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 08:08:48,988 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 [2025-02-08 08:08:48,989 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:48,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1135476508, now seen corresponding path program 1 times [2025-02-08 08:08:48,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:48,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048876886] [2025-02-08 08:08:48,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:48,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:48,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:48,991 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) [2025-02-08 08:08:48,993 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 [2025-02-08 08:08:49,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:08:49,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:08:49,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:49,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:49,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:08:49,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:49,054 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 [2025-02-08 08:08:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:49,117 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:08:49,117 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:49,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048876886] [2025-02-08 08:08:49,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048876886] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:49,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:49,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:08:49,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288877046] [2025-02-08 08:08:49,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:49,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:08:49,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:49,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:08:49,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:08:49,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2025-02-08 08:08:49,147 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) [2025-02-08 08:08:49,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:49,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2025-02-08 08:08:49,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:49,208 INFO L124 PetriNetUnfolderBase]: 14/69 cut-off events. [2025-02-08 08:08:49,209 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-02-08 08:08:49,209 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 136 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. [2025-02-08 08:08:49,209 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 20 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2025-02-08 08:08:49,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 156 flow [2025-02-08 08:08:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:08:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:08:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2025-02-08 08:08:49,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2025-02-08 08:08:49,211 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 104 flow. Second operand 4 states and 118 transitions. [2025-02-08 08:08:49,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 156 flow [2025-02-08 08:08:49,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 148 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:08:49,212 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 107 flow [2025-02-08 08:08:49,212 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} [2025-02-08 08:08:49,213 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-02-08 08:08:49,213 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 107 flow [2025-02-08 08:08:49,213 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) [2025-02-08 08:08:49,213 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:49,213 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:49,221 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 [2025-02-08 08:08:49,413 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 [2025-02-08 08:08:49,414 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:49,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:49,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1082339252, now seen corresponding path program 1 times [2025-02-08 08:08:49,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:49,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502186279] [2025-02-08 08:08:49,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:49,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:49,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:49,417 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) [2025-02-08 08:08:49,418 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 [2025-02-08 08:08:49,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:08:49,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:08:49,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:49,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:49,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-08 08:08:49,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:49,537 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:08:49,537 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:49,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502186279] [2025-02-08 08:08:49,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502186279] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:49,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:49,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:08:49,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93079256] [2025-02-08 08:08:49,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:49,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:08:49,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:49,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:08:49,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:08:49,550 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:08:49,551 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) [2025-02-08 08:08:49,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:49,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:08:49,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:49,659 INFO L124 PetriNetUnfolderBase]: 12/69 cut-off events. [2025-02-08 08:08:49,659 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-02-08 08:08:49,659 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. [2025-02-08 08:08:49,660 INFO L140 encePairwiseOnDemand]: 46/48 looper letters, 20 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2025-02-08 08:08:49,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 149 flow [2025-02-08 08:08:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:08:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:08:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2025-02-08 08:08:49,662 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2025-02-08 08:08:49,662 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 107 flow. Second operand 3 states and 92 transitions. [2025-02-08 08:08:49,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 149 flow [2025-02-08 08:08:49,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 141 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:08:49,663 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 99 flow [2025-02-08 08:08:49,663 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} [2025-02-08 08:08:49,664 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2025-02-08 08:08:49,664 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 99 flow [2025-02-08 08:08:49,664 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) [2025-02-08 08:08:49,664 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:49,664 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:49,678 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 [2025-02-08 08:08:49,868 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 [2025-02-08 08:08:49,868 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:49,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:49,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1592629688, now seen corresponding path program 1 times [2025-02-08 08:08:49,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:49,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553471644] [2025-02-08 08:08:49,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:49,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:49,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:49,873 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) [2025-02-08 08:08:49,873 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 [2025-02-08 08:08:49,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:08:49,970 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:08:49,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:49,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:49,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:08:49,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:49,997 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-08 08:08:49,997 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 [2025-02-08 08:08:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:50,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:50,330 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:50,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553471644] [2025-02-08 08:08:50,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553471644] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:50,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:08:50,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-02-08 08:08:50,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943414491] [2025-02-08 08:08:50,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:50,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:08:50,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:50,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:08:50,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:08:50,570 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:08:50,571 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) [2025-02-08 08:08:50,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:50,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:08:50,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:50,861 INFO L124 PetriNetUnfolderBase]: 26/127 cut-off events. [2025-02-08 08:08:50,862 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2025-02-08 08:08:50,862 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. [2025-02-08 08:08:50,862 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 26 selfloop transitions, 13 changer transitions 0/53 dead transitions. [2025-02-08 08:08:50,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 215 flow [2025-02-08 08:08:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:08:50,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:08:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2025-02-08 08:08:50,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-02-08 08:08:50,864 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 99 flow. Second operand 9 states and 243 transitions. [2025-02-08 08:08:50,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 215 flow [2025-02-08 08:08:50,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:08:50,865 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 149 flow [2025-02-08 08:08:50,865 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} [2025-02-08 08:08:50,866 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2025-02-08 08:08:50,866 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 149 flow [2025-02-08 08:08:50,866 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) [2025-02-08 08:08:50,866 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:50,866 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:50,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 08:08:51,070 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 [2025-02-08 08:08:51,070 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:51,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:51,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1508778746, now seen corresponding path program 1 times [2025-02-08 08:08:51,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:51,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568310505] [2025-02-08 08:08:51,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:51,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:51,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:51,076 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) [2025-02-08 08:08:51,077 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 [2025-02-08 08:08:51,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:08:51,126 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:08:51,126 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:51,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:51,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:08:51,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:51,133 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 [2025-02-08 08:08:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:51,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:51,316 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:51,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568310505] [2025-02-08 08:08:51,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568310505] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:51,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:08:51,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2025-02-08 08:08:51,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870072907] [2025-02-08 08:08:51,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:51,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:08:51,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:51,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:08:51,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:08:51,462 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2025-02-08 08:08:51,462 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) [2025-02-08 08:08:51,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:51,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2025-02-08 08:08:51,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:51,642 INFO L124 PetriNetUnfolderBase]: 26/124 cut-off events. [2025-02-08 08:08:51,643 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2025-02-08 08:08:51,643 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 200 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. [2025-02-08 08:08:51,643 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 27 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2025-02-08 08:08:51,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 249 flow [2025-02-08 08:08:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:08:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:08:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2025-02-08 08:08:51,645 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2025-02-08 08:08:51,645 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 149 flow. Second operand 7 states and 195 transitions. [2025-02-08 08:08:51,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 249 flow [2025-02-08 08:08:51,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 226 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-02-08 08:08:51,646 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 176 flow [2025-02-08 08:08:51,646 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} [2025-02-08 08:08:51,647 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2025-02-08 08:08:51,647 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 176 flow [2025-02-08 08:08:51,647 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) [2025-02-08 08:08:51,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:51,647 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] [2025-02-08 08:08:51,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-08 08:08:51,852 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 [2025-02-08 08:08:51,852 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:51,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1304589385, now seen corresponding path program 1 times [2025-02-08 08:08:51,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:51,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222841082] [2025-02-08 08:08:51,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:51,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:51,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:51,856 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) [2025-02-08 08:08:51,857 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 [2025-02-08 08:08:51,898 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:08:51,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:08:51,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:51,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:51,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-08 08:08:51,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:51,935 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:08:51,935 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:51,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222841082] [2025-02-08 08:08:51,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222841082] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:51,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:51,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:08:51,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571539072] [2025-02-08 08:08:51,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:51,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:08:51,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:51,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:08:51,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:08:51,950 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-08 08:08:51,951 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) [2025-02-08 08:08:51,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:51,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-08 08:08:51,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:52,018 INFO L124 PetriNetUnfolderBase]: 20/117 cut-off events. [2025-02-08 08:08:52,018 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2025-02-08 08:08:52,019 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 191 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. [2025-02-08 08:08:52,019 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 24 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2025-02-08 08:08:52,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 42 transitions, 230 flow [2025-02-08 08:08:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:08:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:08:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2025-02-08 08:08:52,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2025-02-08 08:08:52,020 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 176 flow. Second operand 4 states and 106 transitions. [2025-02-08 08:08:52,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 42 transitions, 230 flow [2025-02-08 08:08:52,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 216 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:08:52,022 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 166 flow [2025-02-08 08:08:52,022 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} [2025-02-08 08:08:52,022 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 6 predicate places. [2025-02-08 08:08:52,022 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 166 flow [2025-02-08 08:08:52,022 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) [2025-02-08 08:08:52,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:52,022 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] [2025-02-08 08:08:52,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 08:08:52,223 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 [2025-02-08 08:08:52,223 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:52,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:52,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1844415681, now seen corresponding path program 1 times [2025-02-08 08:08:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:52,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603964080] [2025-02-08 08:08:52,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:52,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:52,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:52,226 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) [2025-02-08 08:08:52,227 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 [2025-02-08 08:08:52,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 08:08:52,277 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:08:52,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:52,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:52,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:08:52,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:52,284 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 [2025-02-08 08:08:52,371 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 [2025-02-08 08:08:52,387 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 [2025-02-08 08:08:52,449 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 [2025-02-08 08:08:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:52,481 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:08:52,482 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:52,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603964080] [2025-02-08 08:08:52,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603964080] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:52,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:52,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:08:52,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349881970] [2025-02-08 08:08:52,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:52,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 08:08:52,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:52,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 08:08:52,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:08:52,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-02-08 08:08:52,628 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) [2025-02-08 08:08:52,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:52,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-02-08 08:08:52,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:52,856 INFO L124 PetriNetUnfolderBase]: 25/140 cut-off events. [2025-02-08 08:08:52,856 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2025-02-08 08:08:52,856 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 276 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. [2025-02-08 08:08:52,857 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 33 selfloop transitions, 12 changer transitions 0/57 dead transitions. [2025-02-08 08:08:52,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 293 flow [2025-02-08 08:08:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-08 08:08:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-08 08:08:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2025-02-08 08:08:52,859 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2025-02-08 08:08:52,859 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 166 flow. Second operand 12 states and 258 transitions. [2025-02-08 08:08:52,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 293 flow [2025-02-08 08:08:52,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 57 transitions, 283 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:08:52,861 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 224 flow [2025-02-08 08:08:52,861 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} [2025-02-08 08:08:52,861 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2025-02-08 08:08:52,861 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 224 flow [2025-02-08 08:08:52,864 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) [2025-02-08 08:08:52,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:52,864 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] [2025-02-08 08:08:52,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-08 08:08:53,064 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 [2025-02-08 08:08:53,065 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:53,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:53,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1668210064, now seen corresponding path program 1 times [2025-02-08 08:08:53,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:53,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389473185] [2025-02-08 08:08:53,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:53,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:53,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:53,068 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) [2025-02-08 08:08:53,069 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 [2025-02-08 08:08:53,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 08:08:53,126 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:08:53,126 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:53,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:53,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 08:08:53,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:53,216 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 [2025-02-08 08:08:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:53,226 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:08:53,226 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:53,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389473185] [2025-02-08 08:08:53,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389473185] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:08:53,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:08:53,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:08:53,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116095462] [2025-02-08 08:08:53,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:08:53,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:08:53,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:53,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:08:53,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:08:53,251 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2025-02-08 08:08:53,251 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) [2025-02-08 08:08:53,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:53,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2025-02-08 08:08:53,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:53,326 INFO L124 PetriNetUnfolderBase]: 21/122 cut-off events. [2025-02-08 08:08:53,326 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2025-02-08 08:08:53,326 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 197 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. [2025-02-08 08:08:53,328 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2025-02-08 08:08:53,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 45 transitions, 254 flow [2025-02-08 08:08:53,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:08:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:08:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2025-02-08 08:08:53,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2025-02-08 08:08:53,329 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 224 flow. Second operand 6 states and 170 transitions. [2025-02-08 08:08:53,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 45 transitions, 254 flow [2025-02-08 08:08:53,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 45 transitions, 237 flow, removed 2 selfloop flow, removed 7 redundant places. [2025-02-08 08:08:53,331 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 183 flow [2025-02-08 08:08:53,331 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} [2025-02-08 08:08:53,331 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2025-02-08 08:08:53,331 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 183 flow [2025-02-08 08:08:53,332 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) [2025-02-08 08:08:53,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:53,332 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] [2025-02-08 08:08:53,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-08 08:08:53,532 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 [2025-02-08 08:08:53,533 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:53,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1595500727, now seen corresponding path program 1 times [2025-02-08 08:08:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:53,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920470291] [2025-02-08 08:08:53,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:08:53,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:53,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:53,536 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) [2025-02-08 08:08:53,537 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 [2025-02-08 08:08:53,583 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-08 08:08:53,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-08 08:08:53,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:08:53,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:53,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-08 08:08:53,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:53,619 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 [2025-02-08 08:08:53,904 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 [2025-02-08 08:08:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:53,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:54,110 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:54,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920470291] [2025-02-08 08:08:54,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920470291] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:54,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:08:54,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2025-02-08 08:08:54,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839816003] [2025-02-08 08:08:54,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:54,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:08:54,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:54,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:08:54,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:08:54,404 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-08 08:08:54,405 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) [2025-02-08 08:08:54,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:54,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-08 08:08:54,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:54,719 INFO L124 PetriNetUnfolderBase]: 23/122 cut-off events. [2025-02-08 08:08:54,719 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2025-02-08 08:08:54,720 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 197 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. [2025-02-08 08:08:54,720 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 28 selfloop transitions, 11 changer transitions 0/52 dead transitions. [2025-02-08 08:08:54,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 52 transitions, 283 flow [2025-02-08 08:08:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:08:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:08:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2025-02-08 08:08:54,722 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2025-02-08 08:08:54,722 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 183 flow. Second operand 10 states and 247 transitions. [2025-02-08 08:08:54,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 52 transitions, 283 flow [2025-02-08 08:08:54,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 273 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:08:54,724 INFO L231 Difference]: Finished difference. Result has 64 places, 42 transitions, 195 flow [2025-02-08 08:08:54,724 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} [2025-02-08 08:08:54,725 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2025-02-08 08:08:54,725 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 42 transitions, 195 flow [2025-02-08 08:08:54,725 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) [2025-02-08 08:08:54,726 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:54,726 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:08:54,732 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 [2025-02-08 08:08:54,930 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 [2025-02-08 08:08:54,930 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:54,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1689691430, now seen corresponding path program 2 times [2025-02-08 08:08:54,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:54,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454112045] [2025-02-08 08:08:54,932 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:08:54,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:54,934 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) [2025-02-08 08:08:54,936 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 [2025-02-08 08:08:54,980 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-02-08 08:08:55,007 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-08 08:08:55,007 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:08:55,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:55,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:08:55,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:55,033 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-08 08:08:55,034 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 [2025-02-08 08:08:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:55,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:08:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:08:56,313 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:08:56,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454112045] [2025-02-08 08:08:56,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454112045] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:08:56,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:08:56,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2025-02-08 08:08:56,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013138181] [2025-02-08 08:08:56,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:08:56,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-08 08:08:56,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:08:56,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-08 08:08:56,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2025-02-08 08:08:57,112 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-08 08:08:57,113 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) [2025-02-08 08:08:57,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:08:57,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-08 08:08:57,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:08:58,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-08 08:08:59,375 INFO L124 PetriNetUnfolderBase]: 70/267 cut-off events. [2025-02-08 08:08:59,375 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2025-02-08 08:08:59,375 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 404 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. [2025-02-08 08:08:59,376 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 59 selfloop transitions, 28 changer transitions 0/98 dead transitions. [2025-02-08 08:08:59,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 686 flow [2025-02-08 08:08:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-08 08:08:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-08 08:08:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 434 transitions. [2025-02-08 08:08:59,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2025-02-08 08:08:59,380 INFO L175 Difference]: Start difference. First operand has 64 places, 42 transitions, 195 flow. Second operand 18 states and 434 transitions. [2025-02-08 08:08:59,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 686 flow [2025-02-08 08:08:59,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 98 transitions, 612 flow, removed 26 selfloop flow, removed 9 redundant places. [2025-02-08 08:08:59,386 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 424 flow [2025-02-08 08:08:59,386 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} [2025-02-08 08:08:59,386 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2025-02-08 08:08:59,386 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 424 flow [2025-02-08 08:08:59,386 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) [2025-02-08 08:08:59,386 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:08:59,387 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] [2025-02-08 08:08:59,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-08 08:08:59,587 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 [2025-02-08 08:08:59,587 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:08:59,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:08:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash -49632639, now seen corresponding path program 2 times [2025-02-08 08:08:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:08:59,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813527799] [2025-02-08 08:08:59,588 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:08:59,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:08:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:08:59,590 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) [2025-02-08 08:08:59,591 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 [2025-02-08 08:08:59,633 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-08 08:08:59,654 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-08 08:08:59,654 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:08:59,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:08:59,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:08:59,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:08:59,673 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 [2025-02-08 08:09:00,012 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 [2025-02-08 08:09:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:00,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:00,277 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:09:00,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813527799] [2025-02-08 08:09:00,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813527799] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:00,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:09:00,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2025-02-08 08:09:00,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864482932] [2025-02-08 08:09:00,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:00,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:09:00,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:09:00,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:09:00,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:09:00,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-08 08:09:00,718 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) [2025-02-08 08:09:00,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:00,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-08 08:09:00,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:01,100 INFO L124 PetriNetUnfolderBase]: 64/261 cut-off events. [2025-02-08 08:09:01,101 INFO L125 PetriNetUnfolderBase]: For 669/669 co-relation queries the response was YES. [2025-02-08 08:09:01,101 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 389 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. [2025-02-08 08:09:01,102 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 37 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2025-02-08 08:09:01,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 562 flow [2025-02-08 08:09:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-08 08:09:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-08 08:09:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 294 transitions. [2025-02-08 08:09:01,105 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2025-02-08 08:09:01,105 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 424 flow. Second operand 12 states and 294 transitions. [2025-02-08 08:09:01,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 562 flow [2025-02-08 08:09:01,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 73 transitions, 553 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:09:01,109 INFO L231 Difference]: Finished difference. Result has 87 places, 61 transitions, 453 flow [2025-02-08 08:09:01,110 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} [2025-02-08 08:09:01,110 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2025-02-08 08:09:01,110 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 61 transitions, 453 flow [2025-02-08 08:09:01,111 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) [2025-02-08 08:09:01,111 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:01,111 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:09:01,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-08 08:09:01,311 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 [2025-02-08 08:09:01,311 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:09:01,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:01,312 INFO L85 PathProgramCache]: Analyzing trace with hash -295820388, now seen corresponding path program 2 times [2025-02-08 08:09:01,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:09:01,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748004528] [2025-02-08 08:09:01,312 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:09:01,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:01,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:01,317 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) [2025-02-08 08:09:01,319 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 [2025-02-08 08:09:01,364 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-08 08:09:01,373 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 42 statements. [2025-02-08 08:09:01,373 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:09:01,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:01,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:09:01,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:01,410 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-08 08:09:01,411 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 [2025-02-08 08:09:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-08 08:09:01,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-08 08:09:02,070 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:09:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748004528] [2025-02-08 08:09:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748004528] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:02,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:09:02,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-02-08 08:09:02,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335727577] [2025-02-08 08:09:02,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:02,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:09:02,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:09:02,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:09:02,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:09:02,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-08 08:09:02,386 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) [2025-02-08 08:09:02,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:02,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-08 08:09:02,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:02,536 INFO L124 PetriNetUnfolderBase]: 60/247 cut-off events. [2025-02-08 08:09:02,536 INFO L125 PetriNetUnfolderBase]: For 890/890 co-relation queries the response was YES. [2025-02-08 08:09:02,537 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 341 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. [2025-02-08 08:09:02,537 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 25 selfloop transitions, 24 changer transitions 0/62 dead transitions. [2025-02-08 08:09:02,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 62 transitions, 526 flow [2025-02-08 08:09:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:09:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:09:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2025-02-08 08:09:02,539 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5243055555555556 [2025-02-08 08:09:02,539 INFO L175 Difference]: Start difference. First operand has 87 places, 61 transitions, 453 flow. Second operand 6 states and 151 transitions. [2025-02-08 08:09:02,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 62 transitions, 526 flow [2025-02-08 08:09:02,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 62 transitions, 472 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-02-08 08:09:02,542 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 432 flow [2025-02-08 08:09:02,542 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} [2025-02-08 08:09:02,543 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2025-02-08 08:09:02,543 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 432 flow [2025-02-08 08:09:02,543 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) [2025-02-08 08:09:02,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:02,543 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] [2025-02-08 08:09:02,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-08 08:09:02,747 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 [2025-02-08 08:09:02,747 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:09:02,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:02,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1745947619, now seen corresponding path program 3 times [2025-02-08 08:09:02,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:09:02,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053985733] [2025-02-08 08:09:02,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:09:02,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:02,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:02,754 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) [2025-02-08 08:09:02,754 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 [2025-02-08 08:09:02,799 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 4 equivalence classes. [2025-02-08 08:09:02,829 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 48 of 48 statements. [2025-02-08 08:09:02,829 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-08 08:09:02,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:02,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-08 08:09:02,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:02,849 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 [2025-02-08 08:09:03,277 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 [2025-02-08 08:09:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:03,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:03,644 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:09:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053985733] [2025-02-08 08:09:03,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053985733] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:03,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:09:03,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-02-08 08:09:03,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451626061] [2025-02-08 08:09:03,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:03,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 08:09:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:09:03,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 08:09:03,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-02-08 08:09:04,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-08 08:09:04,323 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) [2025-02-08 08:09:04,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:04,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-08 08:09:04,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:04,868 INFO L124 PetriNetUnfolderBase]: 54/239 cut-off events. [2025-02-08 08:09:04,868 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2025-02-08 08:09:04,868 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. [2025-02-08 08:09:04,870 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 38 selfloop transitions, 18 changer transitions 0/73 dead transitions. [2025-02-08 08:09:04,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 577 flow [2025-02-08 08:09:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-08 08:09:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-08 08:09:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 318 transitions. [2025-02-08 08:09:04,873 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2025-02-08 08:09:04,873 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 432 flow. Second operand 13 states and 318 transitions. [2025-02-08 08:09:04,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 577 flow [2025-02-08 08:09:04,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 73 transitions, 545 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:09:04,876 INFO L231 Difference]: Finished difference. Result has 88 places, 59 transitions, 432 flow [2025-02-08 08:09:04,878 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} [2025-02-08 08:09:04,878 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2025-02-08 08:09:04,878 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 59 transitions, 432 flow [2025-02-08 08:09:04,878 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) [2025-02-08 08:09:04,879 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:04,879 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] [2025-02-08 08:09:04,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-08 08:09:05,079 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 [2025-02-08 08:09:05,080 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:09:05,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1862467413, now seen corresponding path program 4 times [2025-02-08 08:09:05,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:09:05,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352946229] [2025-02-08 08:09:05,080 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:09:05,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:05,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:05,086 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) [2025-02-08 08:09:05,087 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 [2025-02-08 08:09:05,132 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-02-08 08:09:05,168 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-02-08 08:09:05,168 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:09:05,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:05,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:09:05,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:05,183 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 [2025-02-08 08:09:05,665 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 [2025-02-08 08:09:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:05,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:06,126 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:09:06,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352946229] [2025-02-08 08:09:06,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352946229] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:06,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:09:06,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2025-02-08 08:09:06,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594719621] [2025-02-08 08:09:06,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:06,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 08:09:06,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:09:06,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 08:09:06,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:09:07,010 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-08 08:09:07,011 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) [2025-02-08 08:09:07,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:07,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-08 08:09:07,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:08,303 INFO L124 PetriNetUnfolderBase]: 48/239 cut-off events. [2025-02-08 08:09:08,304 INFO L125 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2025-02-08 08:09:08,305 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 322 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. [2025-02-08 08:09:08,305 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 50 selfloop transitions, 27 changer transitions 0/94 dead transitions. [2025-02-08 08:09:08,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 94 transitions, 732 flow [2025-02-08 08:09:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-08 08:09:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-02-08 08:09:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 584 transitions. [2025-02-08 08:09:08,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2025-02-08 08:09:08,308 INFO L175 Difference]: Start difference. First operand has 88 places, 59 transitions, 432 flow. Second operand 24 states and 584 transitions. [2025-02-08 08:09:08,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 94 transitions, 732 flow [2025-02-08 08:09:08,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 682 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-02-08 08:09:08,311 INFO L231 Difference]: Finished difference. Result has 104 places, 64 transitions, 491 flow [2025-02-08 08:09:08,311 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} [2025-02-08 08:09:08,312 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 58 predicate places. [2025-02-08 08:09:08,312 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 64 transitions, 491 flow [2025-02-08 08:09:08,314 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) [2025-02-08 08:09:08,314 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:08,314 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] [2025-02-08 08:09:08,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-08 08:09:08,514 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 [2025-02-08 08:09:08,514 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:09:08,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:08,515 INFO L85 PathProgramCache]: Analyzing trace with hash -230291933, now seen corresponding path program 5 times [2025-02-08 08:09:08,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:09:08,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488803907] [2025-02-08 08:09:08,516 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:09:08,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:08,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:08,520 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) [2025-02-08 08:09:08,522 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 [2025-02-08 08:09:08,565 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 6 equivalence classes. [2025-02-08 08:09:08,645 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 62 of 62 statements. [2025-02-08 08:09:08,646 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-08 08:09:08,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:08,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:09:08,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:08,659 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 [2025-02-08 08:09:09,168 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 [2025-02-08 08:09:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:09,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:09,656 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:09:09,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488803907] [2025-02-08 08:09:09,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488803907] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:09,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:09:09,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2025-02-08 08:09:09,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650997031] [2025-02-08 08:09:09,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:09,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:09:09,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:09:09,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:09:09,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:09:10,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-08 08:09:10,562 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) [2025-02-08 08:09:10,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:10,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-08 08:09:10,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:12,328 INFO L124 PetriNetUnfolderBase]: 51/272 cut-off events. [2025-02-08 08:09:12,328 INFO L125 PetriNetUnfolderBase]: For 1108/1108 co-relation queries the response was YES. [2025-02-08 08:09:12,328 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 364 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. [2025-02-08 08:09:12,329 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 55 selfloop transitions, 30 changer transitions 0/102 dead transitions. [2025-02-08 08:09:12,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 102 transitions, 843 flow [2025-02-08 08:09:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-08 08:09:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-02-08 08:09:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 676 transitions. [2025-02-08 08:09:12,331 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2025-02-08 08:09:12,331 INFO L175 Difference]: Start difference. First operand has 104 places, 64 transitions, 491 flow. Second operand 28 states and 676 transitions. [2025-02-08 08:09:12,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 102 transitions, 843 flow [2025-02-08 08:09:12,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 102 transitions, 806 flow, removed 2 selfloop flow, removed 16 redundant places. [2025-02-08 08:09:12,334 INFO L231 Difference]: Finished difference. Result has 121 places, 68 transitions, 588 flow [2025-02-08 08:09:12,334 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} [2025-02-08 08:09:12,335 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2025-02-08 08:09:12,335 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 68 transitions, 588 flow [2025-02-08 08:09:12,335 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) [2025-02-08 08:09:12,335 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:12,335 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:09:12,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-08 08:09:12,536 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 [2025-02-08 08:09:12,536 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:09:12,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1490870106, now seen corresponding path program 3 times [2025-02-08 08:09:12,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:09:12,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808720032] [2025-02-08 08:09:12,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:09:12,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:12,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:12,539 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) [2025-02-08 08:09:12,540 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 [2025-02-08 08:09:12,584 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 9 equivalence classes. [2025-02-08 08:09:12,595 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 68 statements. [2025-02-08 08:09:12,596 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:09:12,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:12,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:09:12,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:12,620 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-08 08:09:12,620 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 [2025-02-08 08:09:13,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:09:13,264 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 [2025-02-08 08:09:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2025-02-08 08:09:13,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2025-02-08 08:09:18,341 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:09:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808720032] [2025-02-08 08:09:18,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808720032] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:18,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:09:18,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-02-08 08:09:18,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299401242] [2025-02-08 08:09:18,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:18,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:09:18,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:09:18,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:09:18,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2025-02-08 08:09:19,114 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2025-02-08 08:09:19,115 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) [2025-02-08 08:09:19,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:19,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2025-02-08 08:09:19,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:19,715 INFO L124 PetriNetUnfolderBase]: 64/277 cut-off events. [2025-02-08 08:09:19,715 INFO L125 PetriNetUnfolderBase]: For 1406/1406 co-relation queries the response was YES. [2025-02-08 08:09:19,716 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 341 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. [2025-02-08 08:09:19,716 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 31 selfloop transitions, 30 changer transitions 0/71 dead transitions. [2025-02-08 08:09:19,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 71 transitions, 696 flow [2025-02-08 08:09:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:09:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:09:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2025-02-08 08:09:19,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2025-02-08 08:09:19,718 INFO L175 Difference]: Start difference. First operand has 121 places, 68 transitions, 588 flow. Second operand 7 states and 163 transitions. [2025-02-08 08:09:19,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 71 transitions, 696 flow [2025-02-08 08:09:19,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 71 transitions, 627 flow, removed 6 selfloop flow, removed 25 redundant places. [2025-02-08 08:09:19,722 INFO L231 Difference]: Finished difference. Result has 100 places, 66 transitions, 553 flow [2025-02-08 08:09:19,722 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} [2025-02-08 08:09:19,723 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2025-02-08 08:09:19,723 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 66 transitions, 553 flow [2025-02-08 08:09:19,723 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) [2025-02-08 08:09:19,723 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:19,723 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] [2025-02-08 08:09:19,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-08 08:09:19,923 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 [2025-02-08 08:09:19,923 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:09:19,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash -236472831, now seen corresponding path program 6 times [2025-02-08 08:09:19,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:09:19,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340577869] [2025-02-08 08:09:19,924 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:09:19,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:19,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:19,926 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) [2025-02-08 08:09:19,927 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 [2025-02-08 08:09:19,973 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 69 statements into 7 equivalence classes. [2025-02-08 08:09:20,089 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 69 of 69 statements. [2025-02-08 08:09:20,089 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-08 08:09:20,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:09:20,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 08:09:20,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:09:20,110 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 [2025-02-08 08:09:21,130 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 [2025-02-08 08:09:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:21,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:09:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:09:22,028 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:09:22,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340577869] [2025-02-08 08:09:22,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340577869] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:09:22,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:09:22,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2025-02-08 08:09:22,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492291406] [2025-02-08 08:09:22,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 08:09:22,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 08:09:22,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:09:22,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 08:09:22,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-02-08 08:09:23,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2025-02-08 08:09:23,687 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) [2025-02-08 08:09:23,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:09:23,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2025-02-08 08:09:23,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:09:26,905 INFO L124 PetriNetUnfolderBase]: 54/293 cut-off events. [2025-02-08 08:09:26,905 INFO L125 PetriNetUnfolderBase]: For 1509/1509 co-relation queries the response was YES. [2025-02-08 08:09:26,912 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 350 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. [2025-02-08 08:09:26,913 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 60 selfloop transitions, 33 changer transitions 0/108 dead transitions. [2025-02-08 08:09:26,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 108 transitions, 966 flow [2025-02-08 08:09:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-08 08:09:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-02-08 08:09:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 768 transitions. [2025-02-08 08:09:26,915 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-08 08:09:26,915 INFO L175 Difference]: Start difference. First operand has 100 places, 66 transitions, 553 flow. Second operand 32 states and 768 transitions. [2025-02-08 08:09:26,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 108 transitions, 966 flow [2025-02-08 08:09:26,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 108 transitions, 928 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:09:26,927 INFO L231 Difference]: Finished difference. Result has 132 places, 70 transitions, 677 flow [2025-02-08 08:09:26,928 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} [2025-02-08 08:09:26,928 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 86 predicate places. [2025-02-08 08:09:26,931 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 70 transitions, 677 flow [2025-02-08 08:09:26,932 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) [2025-02-08 08:09:26,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:09:26,932 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] [2025-02-08 08:09:26,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-08 08:09:27,132 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 [2025-02-08 08:09:27,133 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:09:27,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:09:27,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1310199907, now seen corresponding path program 7 times [2025-02-08 08:09:27,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:09:27,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428902592] [2025-02-08 08:09:27,134 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 08:09:27,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:09:27,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:09:27,135 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) [2025-02-08 08:09:27,137 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 [2025-02-08 08:09:27,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-08 08:09:27,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-08 08:09:27,526 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:09:27,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:09:27,526 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:09:27,544 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-08 08:09:27,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-08 08:09:27,634 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:09:27,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:09:27,668 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-02-08 08:09:27,668 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:09:27,669 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2025-02-08 08:09:27,670 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-02-08 08:09:27,670 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-02-08 08:09:27,670 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-02-08 08:09:27,670 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-02-08 08:09:27,670 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-02-08 08:09:27,671 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-02-08 08:09:27,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-08 08:09:27,872 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 [2025-02-08 08:09:27,872 INFO L422 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:09:27,927 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-08 08:09:27,927 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 08:09:27,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 08:09:27 BasicIcfg [2025-02-08 08:09:27,935 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 08:09:27,935 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 08:09:27,935 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 08:09:27,936 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 08:09:27,937 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:08:47" (3/4) ... [2025-02-08 08:09:27,938 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-02-08 08:09:27,938 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 08:09:27,939 INFO L158 Benchmark]: Toolchain (without parser) took 41533.82ms. Allocated memory was 117.4MB in the beginning and 268.4MB in the end (delta: 151.0MB). Free memory was 91.0MB in the beginning and 91.2MB in the end (delta: -190.9kB). Peak memory consumption was 153.0MB. Max. memory is 16.1GB. [2025-02-08 08:09:27,940 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 83.9MB. Free memory was 62.6MB in the beginning and 62.6MB in the end (delta: 35.7kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:09:27,940 INFO L158 Benchmark]: CACSL2BoogieTranslator took 432.72ms. Allocated memory is still 117.4MB. Free memory was 90.8MB in the beginning and 58.2MB in the end (delta: 32.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-02-08 08:09:27,940 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.21ms. Allocated memory is still 117.4MB. Free memory was 58.2MB in the beginning and 55.9MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:09:27,941 INFO L158 Benchmark]: Boogie Preprocessor took 48.59ms. Allocated memory is still 117.4MB. Free memory was 55.9MB in the beginning and 54.0MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:09:27,941 INFO L158 Benchmark]: IcfgBuilder took 415.97ms. Allocated memory is still 117.4MB. Free memory was 54.0MB in the beginning and 76.0MB in the end (delta: -22.1MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. [2025-02-08 08:09:27,941 INFO L158 Benchmark]: TraceAbstraction took 40587.69ms. Allocated memory was 117.4MB in the beginning and 268.4MB in the end (delta: 151.0MB). Free memory was 75.3MB in the beginning and 91.2MB in the end (delta: -15.9MB). Peak memory consumption was 139.6MB. Max. memory is 16.1GB. [2025-02-08 08:09:27,942 INFO L158 Benchmark]: Witness Printer took 2.97ms. Allocated memory is still 268.4MB. Free memory was 91.2MB in the beginning and 91.2MB in the end (delta: 25.2kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:09:27,943 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 83.9MB. Free memory was 62.6MB in the beginning and 62.6MB in the end (delta: 35.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 432.72ms. Allocated memory is still 117.4MB. Free memory was 90.8MB in the beginning and 58.2MB in the end (delta: 32.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.21ms. Allocated memory is still 117.4MB. Free memory was 58.2MB in the beginning and 55.9MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.59ms. Allocated memory is still 117.4MB. Free memory was 55.9MB in the beginning and 54.0MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 415.97ms. Allocated memory is still 117.4MB. Free memory was 54.0MB in the beginning and 76.0MB in the end (delta: -22.1MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. * TraceAbstraction took 40587.69ms. Allocated memory was 117.4MB in the beginning and 268.4MB in the end (delta: 151.0MB). Free memory was 75.3MB in the beginning and 91.2MB in the end (delta: -15.9MB). Peak memory consumption was 139.6MB. Max. memory is 16.1GB. * Witness Printer took 2.97ms. Allocated memory is still 268.4MB. Free memory was 91.2MB in the beginning and 91.2MB in the end (delta: 25.2kB). 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: 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: 40.5s, OverallIterations: 20, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 19.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3085 SdHoareTripleChecker+Valid, 12.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2724 mSDsluCounter, 2770 SdHoareTripleChecker+Invalid, 11.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2752 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10713 IncrementalHoareTripleChecker+Invalid, 10815 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 18 mSDtfsCounter, 10713 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, 12.6s 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, 14.8s InterpolantComputationTime, 723 NumberOfCodeBlocks, 646 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1116 ConstructedInterpolants, 124 QuantifiedInterpolants, 18487 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 [2025-02-08 08:09:27,971 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 Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample