./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --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/weaver/popl20-more-sorted.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:41:07,965 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:41:08,000 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:41:08,003 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:41:08,004 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:41:08,020 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:41:08,021 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:41:08,021 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:41:08,021 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:41:08,021 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:41:08,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:41:08,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:41:08,021 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:41:08,021 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:41:08,021 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:41:08,022 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:41:08,022 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:41:08,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:41:08,023 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:41:08,023 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:41:08,023 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:41:08,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:41:08,023 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:41:08,023 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:41:08,023 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:41:08,023 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:41:08,023 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 -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2025-02-08 08:41:08,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:41:08,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:41:08,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:41:08,247 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:41:08,247 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:41:08,248 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2025-02-08 08:41:09,451 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/38c36ed2b/371034d5a3d843a2a3ed2e389a75a319/FLAGb6caecd81 [2025-02-08 08:41:09,717 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:41:09,718 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2025-02-08 08:41:09,723 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/38c36ed2b/371034d5a3d843a2a3ed2e389a75a319/FLAGb6caecd81 [2025-02-08 08:41:09,734 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/38c36ed2b/371034d5a3d843a2a3ed2e389a75a319 [2025-02-08 08:41:09,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:41:09,737 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:41:09,738 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:41:09,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:41:09,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:41:09,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a283b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09, skipping insertion in model container [2025-02-08 08:41:09,743 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,753 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:41:09,865 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-08 08:41:09,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:41:09,875 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:41:09,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:41:09,907 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:41:09,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09 WrapperNode [2025-02-08 08:41:09,908 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:41:09,909 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:41:09,909 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:41:09,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:41:09,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,918 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,934 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2025-02-08 08:41:09,935 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:41:09,935 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:41:09,935 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:41:09,935 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:41:09,943 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,946 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,971 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-08 08:41:09,972 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,972 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,976 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,977 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,977 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,978 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,979 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:41:09,980 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:41:09,980 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:41:09,980 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:41:09,981 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (1/1) ... [2025-02-08 08:41:09,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:41:09,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:10,007 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 08:41:10,010 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 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:41:10,030 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:41:10,030 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:41:10,030 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:41:10,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:41:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:41:10,031 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 08:41:10,131 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:41:10,132 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:41:10,429 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:41:10,429 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:41:10,587 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:41:10,587 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:41:10,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:41:10 BoogieIcfgContainer [2025-02-08 08:41:10,588 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:41:10,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:41:10,592 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:41:10,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:41:10,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:41:09" (1/3) ... [2025-02-08 08:41:10,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542d421d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:41:10, skipping insertion in model container [2025-02-08 08:41:10,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:09" (2/3) ... [2025-02-08 08:41:10,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542d421d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:41:10, skipping insertion in model container [2025-02-08 08:41:10,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:41:10" (3/3) ... [2025-02-08 08:41:10,600 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2025-02-08 08:41:10,612 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:41:10,613 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-sorted.wvr.c that has 4 procedures, 53 locations, 1 initial locations, 4 loop locations, and 16 error locations. [2025-02-08 08:41:10,613 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:41:10,678 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:41:10,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 59 transitions, 139 flow [2025-02-08 08:41:10,735 INFO L124 PetriNetUnfolderBase]: 7/56 cut-off events. [2025-02-08 08:41:10,737 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:41:10,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 7/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2025-02-08 08:41:10,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 59 transitions, 139 flow [2025-02-08 08:41:10,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 55 transitions, 128 flow [2025-02-08 08:41:10,751 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:41:10,761 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;@9d119d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:41:10,764 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2025-02-08 08:41:10,767 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:41:10,769 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:41:10,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:41:10,769 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:10,770 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:41:10,770 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:10,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:10,774 INFO L85 PathProgramCache]: Analyzing trace with hash 392137, now seen corresponding path program 1 times [2025-02-08 08:41:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:10,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310002365] [2025-02-08 08:41:10,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:10,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:10,830 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:41:10,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:41:10,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:10,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:10,958 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 08:41:10,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:10,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310002365] [2025-02-08 08:41:10,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310002365] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:10,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:10,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:41:10,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240682422] [2025-02-08 08:41:10,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:10,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:41:10,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:10,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:41:10,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:41:11,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2025-02-08 08:41:11,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 08:41:11,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:11,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2025-02-08 08:41:11,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:11,299 INFO L124 PetriNetUnfolderBase]: 785/1534 cut-off events. [2025-02-08 08:41:11,300 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2025-02-08 08:41:11,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 1534 events. 785/1534 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9323 event pairs, 464 based on Foata normal form. 1/1061 useless extension candidates. Maximal degree in co-relation 2447. Up to 1061 conditions per place. [2025-02-08 08:41:11,316 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 27 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2025-02-08 08:41:11,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 180 flow [2025-02-08 08:41:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:41:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:41:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2025-02-08 08:41:11,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.632768361581921 [2025-02-08 08:41:11,330 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 128 flow. Second operand 3 states and 112 transitions. [2025-02-08 08:41:11,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 180 flow [2025-02-08 08:41:11,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 168 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:41:11,339 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 114 flow [2025-02-08 08:41:11,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2025-02-08 08:41:11,345 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2025-02-08 08:41:11,346 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 114 flow [2025-02-08 08:41:11,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 08:41:11,347 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:11,347 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:41:11,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:41:11,348 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:11,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash 392138, now seen corresponding path program 1 times [2025-02-08 08:41:11,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:11,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216014434] [2025-02-08 08:41:11,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:11,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:11,357 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:41:11,379 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:41:11,380 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:11,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:11,549 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 08:41:11,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:11,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216014434] [2025-02-08 08:41:11,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216014434] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:11,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:11,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:41:11,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781370789] [2025-02-08 08:41:11,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:11,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:11,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:11,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:11,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:11,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2025-02-08 08:41:11,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 08:41:11,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:11,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2025-02-08 08:41:11,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:11,757 INFO L124 PetriNetUnfolderBase]: 786/1537 cut-off events. [2025-02-08 08:41:11,758 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-08 08:41:11,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1537 events. 786/1537 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9326 event pairs, 464 based on Foata normal form. 0/1063 useless extension candidates. Maximal degree in co-relation 2613. Up to 1066 conditions per place. [2025-02-08 08:41:11,764 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 29 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2025-02-08 08:41:11,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 188 flow [2025-02-08 08:41:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2025-02-08 08:41:11,766 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6016949152542372 [2025-02-08 08:41:11,766 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 114 flow. Second operand 4 states and 142 transitions. [2025-02-08 08:41:11,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 188 flow [2025-02-08 08:41:11,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:11,768 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 137 flow [2025-02-08 08:41:11,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2025-02-08 08:41:11,768 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2025-02-08 08:41:11,768 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 137 flow [2025-02-08 08:41:11,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 08:41:11,769 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:11,769 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:41:11,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:41:11,769 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:11,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:11,769 INFO L85 PathProgramCache]: Analyzing trace with hash 376857161, now seen corresponding path program 1 times [2025-02-08 08:41:11,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:11,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910141414] [2025-02-08 08:41:11,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:11,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:11,774 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:41:11,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:41:11,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:11,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:11,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910141414] [2025-02-08 08:41:11,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910141414] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720471837] [2025-02-08 08:41:11,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:11,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:11,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:11,974 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 08:41:11,976 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 08:41:12,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:41:12,036 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:41:12,036 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:12,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:12,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:41:12,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:12,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-08 08:41:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:12,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:12,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720471837] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:12,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:12,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:41:12,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379148443] [2025-02-08 08:41:12,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:12,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:41:12,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:12,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:41:12,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:41:12,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2025-02-08 08:41:12,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 137 flow. Second operand has 11 states, 11 states have (on average 28.363636363636363) internal successors, (312), 11 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 08:41:12,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:12,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2025-02-08 08:41:12,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:12,751 INFO L124 PetriNetUnfolderBase]: 786/1536 cut-off events. [2025-02-08 08:41:12,751 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-08 08:41:12,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2642 conditions, 1536 events. 786/1536 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9304 event pairs, 464 based on Foata normal form. 0/1062 useless extension candidates. Maximal degree in co-relation 2620. Up to 1062 conditions per place. [2025-02-08 08:41:12,759 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 25 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2025-02-08 08:41:12,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 197 flow [2025-02-08 08:41:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:41:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:41:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2025-02-08 08:41:12,761 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5508474576271186 [2025-02-08 08:41:12,761 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 137 flow. Second operand 6 states and 195 transitions. [2025-02-08 08:41:12,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 197 flow [2025-02-08 08:41:12,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:41:12,762 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 144 flow [2025-02-08 08:41:12,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2025-02-08 08:41:12,763 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2025-02-08 08:41:12,763 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 144 flow [2025-02-08 08:41:12,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.363636363636363) internal successors, (312), 11 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 08:41:12,763 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:12,763 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:12,771 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 08:41:12,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:12,968 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:12,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:12,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1470906127, now seen corresponding path program 1 times [2025-02-08 08:41:12,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:12,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6235304] [2025-02-08 08:41:12,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:12,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:12,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:41:12,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:41:12,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:12,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:13,023 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 08:41:13,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:13,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6235304] [2025-02-08 08:41:13,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6235304] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:13,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:13,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:41:13,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078712574] [2025-02-08 08:41:13,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:13,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:13,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:13,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:13,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:13,054 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 59 [2025-02-08 08:41:13,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 08:41:13,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:13,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 59 [2025-02-08 08:41:13,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:13,268 INFO L124 PetriNetUnfolderBase]: 1371/2153 cut-off events. [2025-02-08 08:41:13,268 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-02-08 08:41:13,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4074 conditions, 2153 events. 1371/2153 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10507 event pairs, 893 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 4048. Up to 1859 conditions per place. [2025-02-08 08:41:13,279 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 32 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2025-02-08 08:41:13,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 202 flow [2025-02-08 08:41:13,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2025-02-08 08:41:13,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4661016949152542 [2025-02-08 08:41:13,280 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 144 flow. Second operand 4 states and 110 transitions. [2025-02-08 08:41:13,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 202 flow [2025-02-08 08:41:13,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 172 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-08 08:41:13,281 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 108 flow [2025-02-08 08:41:13,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2025-02-08 08:41:13,282 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2025-02-08 08:41:13,282 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 108 flow [2025-02-08 08:41:13,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 08:41:13,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:13,282 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:13,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:41:13,282 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:13,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:13,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1470906128, now seen corresponding path program 1 times [2025-02-08 08:41:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:13,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131987705] [2025-02-08 08:41:13,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:13,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:13,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:41:13,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:41:13,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:13,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:13,341 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 08:41:13,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131987705] [2025-02-08 08:41:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131987705] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:13,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:13,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:41:13,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695409143] [2025-02-08 08:41:13,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:13,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:41:13,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:13,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:41:13,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:41:13,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:41:13,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 08:41:13,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:13,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:41:13,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:13,449 INFO L124 PetriNetUnfolderBase]: 785/1401 cut-off events. [2025-02-08 08:41:13,449 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-08 08:41:13,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1401 events. 785/1401 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7522 event pairs, 464 based on Foata normal form. 1/1063 useless extension candidates. Maximal degree in co-relation 2479. Up to 1064 conditions per place. [2025-02-08 08:41:13,455 INFO L140 encePairwiseOnDemand]: 56/59 looper letters, 29 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2025-02-08 08:41:13,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 166 flow [2025-02-08 08:41:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:41:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:41:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2025-02-08 08:41:13,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.655367231638418 [2025-02-08 08:41:13,456 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 108 flow. Second operand 3 states and 116 transitions. [2025-02-08 08:41:13,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 166 flow [2025-02-08 08:41:13,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 163 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:13,457 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 105 flow [2025-02-08 08:41:13,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2025-02-08 08:41:13,458 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2025-02-08 08:41:13,458 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 105 flow [2025-02-08 08:41:13,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 08:41:13,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:13,458 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:13,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:41:13,459 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:13,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1517768207, now seen corresponding path program 1 times [2025-02-08 08:41:13,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:13,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499003400] [2025-02-08 08:41:13,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:13,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:13,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:41:13,467 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:41:13,468 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:13,468 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:13,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:13,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499003400] [2025-02-08 08:41:13,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499003400] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:13,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919107885] [2025-02-08 08:41:13,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:13,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:13,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:13,533 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 08:41:13,535 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 08:41:13,573 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:41:13,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:41:13,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:13,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:13,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:41:13,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:13,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:13,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919107885] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:13,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:13,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 08:41:13,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747628506] [2025-02-08 08:41:13,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:13,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:41:13,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:13,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:41:13,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:41:13,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:41:13,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 105 flow. Second operand has 12 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 08:41:13,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:13,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:41:13,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:13,932 INFO L124 PetriNetUnfolderBase]: 1237/2179 cut-off events. [2025-02-08 08:41:13,933 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-02-08 08:41:13,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3940 conditions, 2179 events. 1237/2179 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12441 event pairs, 645 based on Foata normal form. 0/1717 useless extension candidates. Maximal degree in co-relation 3929. Up to 1063 conditions per place. [2025-02-08 08:41:13,942 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 63 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2025-02-08 08:41:13,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 87 transitions, 336 flow [2025-02-08 08:41:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:41:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:41:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2025-02-08 08:41:13,944 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.648910411622276 [2025-02-08 08:41:13,944 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 105 flow. Second operand 7 states and 268 transitions. [2025-02-08 08:41:13,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 87 transitions, 336 flow [2025-02-08 08:41:13,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:13,945 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 150 flow [2025-02-08 08:41:13,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2025-02-08 08:41:13,946 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2025-02-08 08:41:13,946 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 150 flow [2025-02-08 08:41:13,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 08:41:13,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:13,946 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:13,955 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 08:41:14,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:14,147 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:14,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2051355742, now seen corresponding path program 1 times [2025-02-08 08:41:14,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:14,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043251625] [2025-02-08 08:41:14,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:14,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:14,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:41:14,159 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:41:14,159 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:14,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:14,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:14,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043251625] [2025-02-08 08:41:14,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043251625] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:14,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448190921] [2025-02-08 08:41:14,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:14,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:14,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:14,256 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 08:41:14,260 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 08:41:14,298 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:41:14,310 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:41:14,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:14,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:14,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:14,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:14,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:14,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448190921] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:14,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:14,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-08 08:41:14,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605331693] [2025-02-08 08:41:14,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:14,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:41:14,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:14,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:41:14,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:41:14,458 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:41:14,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 29.846153846153847) internal successors, (388), 13 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 08:41:14,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:14,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:41:14,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:14,699 INFO L124 PetriNetUnfolderBase]: 1007/1815 cut-off events. [2025-02-08 08:41:14,699 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2025-02-08 08:41:14,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3569 conditions, 1815 events. 1007/1815 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10273 event pairs, 564 based on Foata normal form. 0/1421 useless extension candidates. Maximal degree in co-relation 2629. Up to 1060 conditions per place. [2025-02-08 08:41:14,708 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 56 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2025-02-08 08:41:14,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 350 flow [2025-02-08 08:41:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:41:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:41:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2025-02-08 08:41:14,714 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6319612590799032 [2025-02-08 08:41:14,714 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 150 flow. Second operand 7 states and 261 transitions. [2025-02-08 08:41:14,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 350 flow [2025-02-08 08:41:14,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:41:14,716 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 179 flow [2025-02-08 08:41:14,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=179, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2025-02-08 08:41:14,716 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2025-02-08 08:41:14,716 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 179 flow [2025-02-08 08:41:14,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.846153846153847) internal successors, (388), 13 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 08:41:14,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:14,717 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:14,723 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 08:41:14,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:14,918 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:14,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:14,918 INFO L85 PathProgramCache]: Analyzing trace with hash -692414130, now seen corresponding path program 2 times [2025-02-08 08:41:14,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:14,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582897058] [2025-02-08 08:41:14,918 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:14,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:14,925 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-08 08:41:14,931 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 11 statements. [2025-02-08 08:41:14,931 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:41:14,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:41:15,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:15,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582897058] [2025-02-08 08:41:15,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582897058] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:15,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:15,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:41:15,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780365600] [2025-02-08 08:41:15,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:15,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:41:15,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:15,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:41:15,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:41:15,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-08 08:41:15,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 08:41:15,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:15,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-08 08:41:15,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:15,447 INFO L124 PetriNetUnfolderBase]: 1747/2981 cut-off events. [2025-02-08 08:41:15,447 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2025-02-08 08:41:15,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6295 conditions, 2981 events. 1747/2981 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17241 event pairs, 691 based on Foata normal form. 62/2387 useless extension candidates. Maximal degree in co-relation 5197. Up to 1747 conditions per place. [2025-02-08 08:41:15,462 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 67 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2025-02-08 08:41:15,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 431 flow [2025-02-08 08:41:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:41:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:41:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2025-02-08 08:41:15,464 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6299435028248588 [2025-02-08 08:41:15,464 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 179 flow. Second operand 6 states and 223 transitions. [2025-02-08 08:41:15,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 431 flow [2025-02-08 08:41:15,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:15,468 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 213 flow [2025-02-08 08:41:15,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2025-02-08 08:41:15,469 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 7 predicate places. [2025-02-08 08:41:15,470 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 213 flow [2025-02-08 08:41:15,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 08:41:15,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:15,470 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:15,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:41:15,471 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:15,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash -27770079, now seen corresponding path program 2 times [2025-02-08 08:41:15,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:15,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993219439] [2025-02-08 08:41:15,471 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:15,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:15,476 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-08 08:41:15,484 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 13 statements. [2025-02-08 08:41:15,484 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:41:15,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:41:15,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:15,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993219439] [2025-02-08 08:41:15,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993219439] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:15,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:15,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:41:15,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748547814] [2025-02-08 08:41:15,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:15,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:41:15,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:15,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:41:15,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:41:15,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-08 08:41:15,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 08:41:15,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:15,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-08 08:41:15,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:16,072 INFO L124 PetriNetUnfolderBase]: 2787/4654 cut-off events. [2025-02-08 08:41:16,072 INFO L125 PetriNetUnfolderBase]: For 2833/2905 co-relation queries the response was YES. [2025-02-08 08:41:16,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11024 conditions, 4654 events. 2787/4654 cut-off events. For 2833/2905 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28663 event pairs, 1116 based on Foata normal form. 101/3861 useless extension candidates. Maximal degree in co-relation 9823. Up to 2697 conditions per place. [2025-02-08 08:41:16,131 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 74 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2025-02-08 08:41:16,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 539 flow [2025-02-08 08:41:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:41:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:41:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2025-02-08 08:41:16,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6242937853107344 [2025-02-08 08:41:16,133 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 213 flow. Second operand 6 states and 221 transitions. [2025-02-08 08:41:16,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 539 flow [2025-02-08 08:41:16,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 508 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-02-08 08:41:16,139 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 243 flow [2025-02-08 08:41:16,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2025-02-08 08:41:16,140 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2025-02-08 08:41:16,140 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 243 flow [2025-02-08 08:41:16,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 08:41:16,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:16,140 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:16,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:41:16,140 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:16,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash -799302183, now seen corresponding path program 1 times [2025-02-08 08:41:16,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:16,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537973468] [2025-02-08 08:41:16,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:16,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:16,145 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:41:16,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:41:16,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:16,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:16,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:16,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537973468] [2025-02-08 08:41:16,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537973468] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:16,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803389300] [2025-02-08 08:41:16,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:16,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:16,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:16,201 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 08:41:16,203 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 08:41:16,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:41:16,248 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:41:16,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:16,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:16,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:16,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:16,308 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:16,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803389300] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:16,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:16,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 08:41:16,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212616133] [2025-02-08 08:41:16,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:16,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:41:16,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:16,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:41:16,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:41:16,373 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:41:16,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 08:41:16,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:16,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:41:16,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:16,695 INFO L124 PetriNetUnfolderBase]: 2156/3903 cut-off events. [2025-02-08 08:41:16,696 INFO L125 PetriNetUnfolderBase]: For 3459/3517 co-relation queries the response was YES. [2025-02-08 08:41:16,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9762 conditions, 3903 events. 2156/3903 cut-off events. For 3459/3517 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25899 event pairs, 1169 based on Foata normal form. 0/3230 useless extension candidates. Maximal degree in co-relation 8928. Up to 2652 conditions per place. [2025-02-08 08:41:16,708 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 55 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2025-02-08 08:41:16,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 441 flow [2025-02-08 08:41:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:41:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:41:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 254 transitions. [2025-02-08 08:41:16,709 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6150121065375302 [2025-02-08 08:41:16,709 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 243 flow. Second operand 7 states and 254 transitions. [2025-02-08 08:41:16,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 441 flow [2025-02-08 08:41:16,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 424 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-08 08:41:16,714 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 259 flow [2025-02-08 08:41:16,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2025-02-08 08:41:16,714 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2025-02-08 08:41:16,715 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 259 flow [2025-02-08 08:41:16,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 08:41:16,715 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:16,715 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:16,721 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 08:41:16,919 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,SelfDestructingSolverStorable9 [2025-02-08 08:41:16,919 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:16,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1019912504, now seen corresponding path program 1 times [2025-02-08 08:41:16,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:16,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334123675] [2025-02-08 08:41:16,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:16,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:16,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:41:16,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:41:16,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:16,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:16,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:16,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334123675] [2025-02-08 08:41:16,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334123675] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:16,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700149567] [2025-02-08 08:41:16,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:16,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:16,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:16,991 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 08:41:16,993 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 08:41:17,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:41:17,035 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:41:17,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:17,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:41:17,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:17,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:17,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700149567] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:17,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:17,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-02-08 08:41:17,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631550021] [2025-02-08 08:41:17,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:17,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 08:41:17,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:17,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 08:41:17,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:41:17,194 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:41:17,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 259 flow. Second operand has 17 states, 17 states have (on average 29.764705882352942) internal successors, (506), 17 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 08:41:17,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:17,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:41:17,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:17,679 INFO L124 PetriNetUnfolderBase]: 3721/6551 cut-off events. [2025-02-08 08:41:17,679 INFO L125 PetriNetUnfolderBase]: For 5032/5143 co-relation queries the response was YES. [2025-02-08 08:41:17,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16507 conditions, 6551 events. 3721/6551 cut-off events. For 5032/5143 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45556 event pairs, 1516 based on Foata normal form. 0/5541 useless extension candidates. Maximal degree in co-relation 8949. Up to 2694 conditions per place. [2025-02-08 08:41:17,706 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 104 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2025-02-08 08:41:17,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 784 flow [2025-02-08 08:41:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:41:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:41:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 346 transitions. [2025-02-08 08:41:17,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6516007532956686 [2025-02-08 08:41:17,708 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 259 flow. Second operand 9 states and 346 transitions. [2025-02-08 08:41:17,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 784 flow [2025-02-08 08:41:17,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 769 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:17,716 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 346 flow [2025-02-08 08:41:17,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=346, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2025-02-08 08:41:17,717 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2025-02-08 08:41:17,717 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 346 flow [2025-02-08 08:41:17,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.764705882352942) internal successors, (506), 17 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 08:41:17,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:17,717 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:17,723 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 08:41:17,918 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,SelfDestructingSolverStorable10 [2025-02-08 08:41:17,918 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:17,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1753665128, now seen corresponding path program 2 times [2025-02-08 08:41:17,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:17,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476317598] [2025-02-08 08:41:17,918 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:17,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:17,923 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-08 08:41:17,927 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:41:17,928 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:17,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:18,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:18,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476317598] [2025-02-08 08:41:18,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476317598] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:18,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126347645] [2025-02-08 08:41:18,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:18,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:18,078 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 08:41:18,080 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 08:41:18,119 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-08 08:41:18,134 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:41:18,134 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:18,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:18,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 08:41:18,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:18,147 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 08:41:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:18,288 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:41:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126347645] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:18,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:41:18,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2025-02-08 08:41:18,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927622363] [2025-02-08 08:41:18,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:18,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:18,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:18,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:41:18,420 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-08 08:41:18,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 08:41:18,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:18,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-08 08:41:18,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:18,969 INFO L124 PetriNetUnfolderBase]: 3596/6222 cut-off events. [2025-02-08 08:41:18,969 INFO L125 PetriNetUnfolderBase]: For 8347/8405 co-relation queries the response was YES. [2025-02-08 08:41:18,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17026 conditions, 6222 events. 3596/6222 cut-off events. For 8347/8405 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42345 event pairs, 976 based on Foata normal form. 242/5528 useless extension candidates. Maximal degree in co-relation 12691. Up to 2281 conditions per place. [2025-02-08 08:41:18,997 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 93 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2025-02-08 08:41:18,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 848 flow [2025-02-08 08:41:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:41:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:41:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2025-02-08 08:41:18,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6016949152542372 [2025-02-08 08:41:18,999 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 346 flow. Second operand 6 states and 213 transitions. [2025-02-08 08:41:18,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 848 flow [2025-02-08 08:41:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 117 transitions, 829 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:19,013 INFO L231 Difference]: Finished difference. Result has 84 places, 67 transitions, 351 flow [2025-02-08 08:41:19,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2025-02-08 08:41:19,014 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 26 predicate places. [2025-02-08 08:41:19,015 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 351 flow [2025-02-08 08:41:19,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 08:41:19,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:19,015 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:19,024 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 08:41:19,216 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,SelfDestructingSolverStorable11 [2025-02-08 08:41:19,216 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:19,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:19,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1499432281, now seen corresponding path program 2 times [2025-02-08 08:41:19,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:19,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146095628] [2025-02-08 08:41:19,217 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:19,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:19,223 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-08 08:41:19,228 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:41:19,230 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:19,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-08 08:41:19,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:19,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146095628] [2025-02-08 08:41:19,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146095628] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:19,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:19,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:41:19,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640748232] [2025-02-08 08:41:19,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:19,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:19,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:19,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:19,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-08 08:41:19,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 351 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:19,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:19,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-08 08:41:19,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:19,943 INFO L124 PetriNetUnfolderBase]: 7354/11452 cut-off events. [2025-02-08 08:41:19,943 INFO L125 PetriNetUnfolderBase]: For 13198/13418 co-relation queries the response was YES. [2025-02-08 08:41:19,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33387 conditions, 11452 events. 7354/11452 cut-off events. For 13198/13418 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 73331 event pairs, 2851 based on Foata normal form. 0/9715 useless extension candidates. Maximal degree in co-relation 20892. Up to 5943 conditions per place. [2025-02-08 08:41:20,068 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 111 selfloop transitions, 10 changer transitions 0/133 dead transitions. [2025-02-08 08:41:20,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 133 transitions, 868 flow [2025-02-08 08:41:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:41:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:41:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2025-02-08 08:41:20,069 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7322033898305085 [2025-02-08 08:41:20,070 INFO L175 Difference]: Start difference. First operand has 84 places, 67 transitions, 351 flow. Second operand 5 states and 216 transitions. [2025-02-08 08:41:20,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 133 transitions, 868 flow [2025-02-08 08:41:20,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 824 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:41:20,098 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 413 flow [2025-02-08 08:41:20,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=413, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2025-02-08 08:41:20,099 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 29 predicate places. [2025-02-08 08:41:20,099 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 413 flow [2025-02-08 08:41:20,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:20,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:20,099 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:20,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-08 08:41:20,099 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:20,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1631612240, now seen corresponding path program 1 times [2025-02-08 08:41:20,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:20,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647804588] [2025-02-08 08:41:20,100 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:20,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:20,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:41:20,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:41:20,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:20,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:20,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:20,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647804588] [2025-02-08 08:41:20,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647804588] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:20,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204763767] [2025-02-08 08:41:20,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:20,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:20,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:20,179 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 08:41:20,182 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 08:41:20,217 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:41:20,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:41:20,229 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:20,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:20,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:41:20,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:20,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:20,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204763767] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:20,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:20,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-08 08:41:20,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348309187] [2025-02-08 08:41:20,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:20,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 08:41:20,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:20,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 08:41:20,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2025-02-08 08:41:20,435 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:41:20,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 73 transitions, 413 flow. Second operand has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 08:41:20,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:20,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:41:20,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:21,121 INFO L124 PetriNetUnfolderBase]: 4515/7758 cut-off events. [2025-02-08 08:41:21,121 INFO L125 PetriNetUnfolderBase]: For 12512/12758 co-relation queries the response was YES. [2025-02-08 08:41:21,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22388 conditions, 7758 events. 4515/7758 cut-off events. For 12512/12758 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 53164 event pairs, 2123 based on Foata normal form. 146/7023 useless extension candidates. Maximal degree in co-relation 14901. Up to 3902 conditions per place. [2025-02-08 08:41:21,156 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 103 selfloop transitions, 14 changer transitions 0/132 dead transitions. [2025-02-08 08:41:21,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 132 transitions, 933 flow [2025-02-08 08:41:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:41:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:41:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 344 transitions. [2025-02-08 08:41:21,157 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.647834274952919 [2025-02-08 08:41:21,157 INFO L175 Difference]: Start difference. First operand has 87 places, 73 transitions, 413 flow. Second operand 9 states and 344 transitions. [2025-02-08 08:41:21,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 132 transitions, 933 flow [2025-02-08 08:41:21,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 132 transitions, 931 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-02-08 08:41:21,175 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 483 flow [2025-02-08 08:41:21,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=483, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2025-02-08 08:41:21,176 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 40 predicate places. [2025-02-08 08:41:21,176 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 483 flow [2025-02-08 08:41:21,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 08:41:21,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:21,177 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:21,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:21,381 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 08:41:21,381 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:21,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1175454974, now seen corresponding path program 1 times [2025-02-08 08:41:21,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:21,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659322849] [2025-02-08 08:41:21,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:21,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:41:21,393 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:41:21,393 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:21,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:21,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:21,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659322849] [2025-02-08 08:41:21,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659322849] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:21,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915000565] [2025-02-08 08:41:21,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:21,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:21,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:21,591 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 08:41:21,595 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 08:41:21,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:41:21,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:41:21,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:21,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:21,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:21,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-08 08:41:21,729 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:41:21,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915000565] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:21,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:41:21,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2025-02-08 08:41:21,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335078194] [2025-02-08 08:41:21,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:21,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:21,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:21,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:21,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:41:21,784 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-08 08:41:21,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 483 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 08:41:21,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:21,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-08 08:41:21,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:22,646 INFO L124 PetriNetUnfolderBase]: 5531/8835 cut-off events. [2025-02-08 08:41:22,646 INFO L125 PetriNetUnfolderBase]: For 15632/15820 co-relation queries the response was YES. [2025-02-08 08:41:22,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28759 conditions, 8835 events. 5531/8835 cut-off events. For 15632/15820 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 56822 event pairs, 1037 based on Foata normal form. 98/8173 useless extension candidates. Maximal degree in co-relation 20921. Up to 2583 conditions per place. [2025-02-08 08:41:22,711 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 134 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2025-02-08 08:41:22,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 167 transitions, 1249 flow [2025-02-08 08:41:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:41:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:41:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 305 transitions. [2025-02-08 08:41:22,712 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6461864406779662 [2025-02-08 08:41:22,712 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 483 flow. Second operand 8 states and 305 transitions. [2025-02-08 08:41:22,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 167 transitions, 1249 flow [2025-02-08 08:41:22,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 167 transitions, 1217 flow, removed 9 selfloop flow, removed 5 redundant places. [2025-02-08 08:41:22,821 INFO L231 Difference]: Finished difference. Result has 99 places, 79 transitions, 515 flow [2025-02-08 08:41:22,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=515, PETRI_PLACES=99, PETRI_TRANSITIONS=79} [2025-02-08 08:41:22,821 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 41 predicate places. [2025-02-08 08:41:22,822 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 79 transitions, 515 flow [2025-02-08 08:41:22,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 08:41:22,822 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:22,822 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:22,828 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 08:41:23,022 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 08:41:23,023 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:23,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:23,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1406350031, now seen corresponding path program 2 times [2025-02-08 08:41:23,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:23,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233141244] [2025-02-08 08:41:23,024 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:23,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:23,032 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-08 08:41:23,037 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:41:23,037 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:23,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-08 08:41:23,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:23,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233141244] [2025-02-08 08:41:23,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233141244] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:23,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:23,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:41:23,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200476456] [2025-02-08 08:41:23,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:23,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:23,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:23,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:23,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:23,101 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-08 08:41:23,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 79 transitions, 515 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:23,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:23,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-08 08:41:23,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:23,905 INFO L124 PetriNetUnfolderBase]: 9271/14004 cut-off events. [2025-02-08 08:41:23,905 INFO L125 PetriNetUnfolderBase]: For 32644/32716 co-relation queries the response was YES. [2025-02-08 08:41:23,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46413 conditions, 14004 events. 9271/14004 cut-off events. For 32644/32716 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 86854 event pairs, 4080 based on Foata normal form. 0/12369 useless extension candidates. Maximal degree in co-relation 32920. Up to 7952 conditions per place. [2025-02-08 08:41:23,979 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 149 selfloop transitions, 10 changer transitions 0/171 dead transitions. [2025-02-08 08:41:23,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 171 transitions, 1425 flow [2025-02-08 08:41:23,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:41:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:41:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 212 transitions. [2025-02-08 08:41:23,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7186440677966102 [2025-02-08 08:41:23,981 INFO L175 Difference]: Start difference. First operand has 99 places, 79 transitions, 515 flow. Second operand 5 states and 212 transitions. [2025-02-08 08:41:23,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 171 transitions, 1425 flow [2025-02-08 08:41:24,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 171 transitions, 1345 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:24,025 INFO L231 Difference]: Finished difference. Result has 103 places, 85 transitions, 567 flow [2025-02-08 08:41:24,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=567, PETRI_PLACES=103, PETRI_TRANSITIONS=85} [2025-02-08 08:41:24,026 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 45 predicate places. [2025-02-08 08:41:24,026 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 85 transitions, 567 flow [2025-02-08 08:41:24,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:24,026 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:24,026 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:24,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-08 08:41:24,026 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:24,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:24,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2079366158, now seen corresponding path program 1 times [2025-02-08 08:41:24,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:24,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400806086] [2025-02-08 08:41:24,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:24,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:24,031 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:41:24,035 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:41:24,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:24,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:24,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:24,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400806086] [2025-02-08 08:41:24,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400806086] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:24,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740942206] [2025-02-08 08:41:24,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:24,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:24,203 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 08:41:24,204 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 08:41:24,239 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 08:41:24,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:41:24,253 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:24,253 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:24,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-08 08:41:24,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:24,258 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 08:41:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:24,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:24,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740942206] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:24,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:24,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2025-02-08 08:41:24,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535148968] [2025-02-08 08:41:24,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:24,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-08 08:41:24,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:24,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-08 08:41:24,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2025-02-08 08:41:25,106 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2025-02-08 08:41:25,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 85 transitions, 567 flow. Second operand has 26 states, 26 states have (on average 23.96153846153846) internal successors, (623), 26 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 08:41:25,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:25,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2025-02-08 08:41:25,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:26,610 INFO L124 PetriNetUnfolderBase]: 14597/21769 cut-off events. [2025-02-08 08:41:26,611 INFO L125 PetriNetUnfolderBase]: For 49723/50449 co-relation queries the response was YES. [2025-02-08 08:41:26,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72356 conditions, 21769 events. 14597/21769 cut-off events. For 49723/50449 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 134146 event pairs, 5322 based on Foata normal form. 702/21497 useless extension candidates. Maximal degree in co-relation 57202. Up to 7700 conditions per place. [2025-02-08 08:41:26,736 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 177 selfloop transitions, 20 changer transitions 0/208 dead transitions. [2025-02-08 08:41:26,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 208 transitions, 1540 flow [2025-02-08 08:41:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 08:41:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 08:41:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 392 transitions. [2025-02-08 08:41:26,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6040061633281972 [2025-02-08 08:41:26,742 INFO L175 Difference]: Start difference. First operand has 103 places, 85 transitions, 567 flow. Second operand 11 states and 392 transitions. [2025-02-08 08:41:26,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 208 transitions, 1540 flow [2025-02-08 08:41:26,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 208 transitions, 1532 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-02-08 08:41:26,990 INFO L231 Difference]: Finished difference. Result has 116 places, 92 transitions, 682 flow [2025-02-08 08:41:26,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=682, PETRI_PLACES=116, PETRI_TRANSITIONS=92} [2025-02-08 08:41:26,990 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 58 predicate places. [2025-02-08 08:41:26,990 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 92 transitions, 682 flow [2025-02-08 08:41:26,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 23.96153846153846) internal successors, (623), 26 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 08:41:26,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:26,991 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:26,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:27,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:27,191 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:27,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:27,192 INFO L85 PathProgramCache]: Analyzing trace with hash 448318486, now seen corresponding path program 1 times [2025-02-08 08:41:27,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:27,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734526294] [2025-02-08 08:41:27,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:27,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:27,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:41:27,219 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:41:27,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:27,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:27,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:27,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734526294] [2025-02-08 08:41:27,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734526294] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:27,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113329096] [2025-02-08 08:41:27,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:27,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:27,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:27,492 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 08:41:27,493 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 08:41:27,532 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:41:27,547 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:41:27,548 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:27,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:27,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:27,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-08 08:41:27,664 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:41:27,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113329096] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:27,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:41:27,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2025-02-08 08:41:27,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041702679] [2025-02-08 08:41:27,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:27,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:27,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:27,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:27,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:41:27,741 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2025-02-08 08:41:27,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 92 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 08:41:27,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:27,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2025-02-08 08:41:27,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:28,885 INFO L124 PetriNetUnfolderBase]: 9917/15554 cut-off events. [2025-02-08 08:41:28,886 INFO L125 PetriNetUnfolderBase]: For 49987/50189 co-relation queries the response was YES. [2025-02-08 08:41:28,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56447 conditions, 15554 events. 9917/15554 cut-off events. For 49987/50189 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 102233 event pairs, 1714 based on Foata normal form. 228/15027 useless extension candidates. Maximal degree in co-relation 44025. Up to 4749 conditions per place. [2025-02-08 08:41:29,003 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 202 selfloop transitions, 20 changer transitions 0/235 dead transitions. [2025-02-08 08:41:29,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 235 transitions, 2227 flow [2025-02-08 08:41:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:41:29,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:41:29,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 301 transitions. [2025-02-08 08:41:29,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6377118644067796 [2025-02-08 08:41:29,005 INFO L175 Difference]: Start difference. First operand has 116 places, 92 transitions, 682 flow. Second operand 8 states and 301 transitions. [2025-02-08 08:41:29,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 235 transitions, 2227 flow [2025-02-08 08:41:29,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 235 transitions, 2117 flow, removed 27 selfloop flow, removed 7 redundant places. [2025-02-08 08:41:29,291 INFO L231 Difference]: Finished difference. Result has 115 places, 94 transitions, 690 flow [2025-02-08 08:41:29,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=690, PETRI_PLACES=115, PETRI_TRANSITIONS=94} [2025-02-08 08:41:29,292 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 57 predicate places. [2025-02-08 08:41:29,292 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 94 transitions, 690 flow [2025-02-08 08:41:29,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 08:41:29,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:29,292 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:29,299 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 08:41:29,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 08:41:29,493 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:29,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1012971522, now seen corresponding path program 1 times [2025-02-08 08:41:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718711294] [2025-02-08 08:41:29,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:29,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:29,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:41:29,506 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:41:29,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:29,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-08 08:41:29,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:29,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718711294] [2025-02-08 08:41:29,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718711294] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:29,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434538813] [2025-02-08 08:41:29,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:29,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:29,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:29,636 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 08:41:29,637 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 08:41:29,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:41:29,691 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:41:29,691 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:29,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:29,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:41:29,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:29,867 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:29,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2025-02-08 08:41:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:30,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434538813] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:30,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:30,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 18 [2025-02-08 08:41:30,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591932450] [2025-02-08 08:41:30,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:30,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 08:41:30,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:30,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 08:41:30,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:41:30,637 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2025-02-08 08:41:30,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 94 transitions, 690 flow. Second operand has 20 states, 20 states have (on average 25.4) internal successors, (508), 20 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 08:41:30,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:30,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2025-02-08 08:41:30,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:33,290 INFO L124 PetriNetUnfolderBase]: 19605/29295 cut-off events. [2025-02-08 08:41:33,290 INFO L125 PetriNetUnfolderBase]: For 88169/88169 co-relation queries the response was YES. [2025-02-08 08:41:33,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106289 conditions, 29295 events. 19605/29295 cut-off events. For 88169/88169 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 186762 event pairs, 4234 based on Foata normal form. 556/28637 useless extension candidates. Maximal degree in co-relation 89792. Up to 6790 conditions per place. [2025-02-08 08:41:33,812 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 250 selfloop transitions, 26 changer transitions 0/286 dead transitions. [2025-02-08 08:41:33,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 286 transitions, 2394 flow [2025-02-08 08:41:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-08 08:41:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-08 08:41:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 500 transitions. [2025-02-08 08:41:33,813 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6053268765133172 [2025-02-08 08:41:33,814 INFO L175 Difference]: Start difference. First operand has 115 places, 94 transitions, 690 flow. Second operand 14 states and 500 transitions. [2025-02-08 08:41:33,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 286 transitions, 2394 flow [2025-02-08 08:41:34,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 286 transitions, 2347 flow, removed 8 selfloop flow, removed 5 redundant places. [2025-02-08 08:41:34,195 INFO L231 Difference]: Finished difference. Result has 127 places, 103 transitions, 808 flow [2025-02-08 08:41:34,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=808, PETRI_PLACES=127, PETRI_TRANSITIONS=103} [2025-02-08 08:41:34,195 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 69 predicate places. [2025-02-08 08:41:34,195 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 103 transitions, 808 flow [2025-02-08 08:41:34,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 25.4) internal successors, (508), 20 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 08:41:34,196 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:34,196 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] [2025-02-08 08:41:34,202 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 08:41:34,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:34,400 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:34,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2055708219, now seen corresponding path program 1 times [2025-02-08 08:41:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:34,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952805512] [2025-02-08 08:41:34,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:34,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:34,404 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:41:34,409 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:41:34,409 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:34,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:41:34,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952805512] [2025-02-08 08:41:34,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952805512] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:34,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:34,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:41:34,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291869129] [2025-02-08 08:41:34,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:34,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:41:34,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:34,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:41:34,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:41:34,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:41:34,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 103 transitions, 808 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 08:41:34,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:34,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:41:34,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:35,851 INFO L124 PetriNetUnfolderBase]: 13939/21817 cut-off events. [2025-02-08 08:41:35,851 INFO L125 PetriNetUnfolderBase]: For 88522/88618 co-relation queries the response was YES. [2025-02-08 08:41:35,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84257 conditions, 21817 events. 13939/21817 cut-off events. For 88522/88618 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 147275 event pairs, 2902 based on Foata normal form. 3/20650 useless extension candidates. Maximal degree in co-relation 69469. Up to 16656 conditions per place. [2025-02-08 08:41:36,026 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 104 selfloop transitions, 11 changer transitions 8/138 dead transitions. [2025-02-08 08:41:36,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 138 transitions, 1304 flow [2025-02-08 08:41:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:41:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:41:36,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2025-02-08 08:41:36,035 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7740112994350282 [2025-02-08 08:41:36,035 INFO L175 Difference]: Start difference. First operand has 127 places, 103 transitions, 808 flow. Second operand 3 states and 137 transitions. [2025-02-08 08:41:36,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 138 transitions, 1304 flow [2025-02-08 08:41:36,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 138 transitions, 1257 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-02-08 08:41:36,171 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 832 flow [2025-02-08 08:41:36,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=832, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2025-02-08 08:41:36,172 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 65 predicate places. [2025-02-08 08:41:36,172 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 832 flow [2025-02-08 08:41:36,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 08:41:36,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:36,172 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2025-02-08 08:41:36,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-08 08:41:36,172 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:36,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash -571283585, now seen corresponding path program 2 times [2025-02-08 08:41:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:36,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000163918] [2025-02-08 08:41:36,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:36,178 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-08 08:41:36,186 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:41:36,188 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:36,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-08 08:41:36,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000163918] [2025-02-08 08:41:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000163918] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568899832] [2025-02-08 08:41:36,289 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:36,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:36,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:36,294 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 08:41:36,295 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 08:41:36,354 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-08 08:41:36,372 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:41:36,372 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:36,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:36,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-08 08:41:36,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:36,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:36,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2025-02-08 08:41:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:36,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568899832] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:36,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:36,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 24 [2025-02-08 08:41:36,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534571329] [2025-02-08 08:41:36,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:36,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-08 08:41:36,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:36,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-08 08:41:36,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2025-02-08 08:41:37,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2025-02-08 08:41:37,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 832 flow. Second operand has 26 states, 26 states have (on average 25.115384615384617) internal successors, (653), 26 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 08:41:37,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:37,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2025-02-08 08:41:37,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:42,369 INFO L124 PetriNetUnfolderBase]: 41580/61994 cut-off events. [2025-02-08 08:41:42,370 INFO L125 PetriNetUnfolderBase]: For 242829/242829 co-relation queries the response was YES. [2025-02-08 08:41:42,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239744 conditions, 61994 events. 41580/61994 cut-off events. For 242829/242829 co-relation queries the response was YES. Maximal size of possible extension queue 1461. Compared 444227 event pairs, 7118 based on Foata normal form. 536/60215 useless extension candidates. Maximal degree in co-relation 216901. Up to 11328 conditions per place. [2025-02-08 08:41:42,816 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 508 selfloop transitions, 55 changer transitions 0/572 dead transitions. [2025-02-08 08:41:42,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 572 transitions, 5482 flow [2025-02-08 08:41:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-08 08:41:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-08 08:41:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 716 transitions. [2025-02-08 08:41:42,818 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6067796610169491 [2025-02-08 08:41:42,818 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 832 flow. Second operand 20 states and 716 transitions. [2025-02-08 08:41:42,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 572 transitions, 5482 flow [2025-02-08 08:41:43,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 572 transitions, 5264 flow, removed 83 selfloop flow, removed 8 redundant places. [2025-02-08 08:41:43,732 INFO L231 Difference]: Finished difference. Result has 132 places, 130 transitions, 1177 flow [2025-02-08 08:41:43,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1177, PETRI_PLACES=132, PETRI_TRANSITIONS=130} [2025-02-08 08:41:43,732 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 74 predicate places. [2025-02-08 08:41:43,732 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 130 transitions, 1177 flow [2025-02-08 08:41:43,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 25.115384615384617) internal successors, (653), 26 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 08:41:43,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:43,733 INFO L206 CegarLoopForPetriNet]: trace histogram [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 08:41:43,738 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 08:41:43,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:43,933 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:43,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash 748788881, now seen corresponding path program 1 times [2025-02-08 08:41:43,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:43,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089973351] [2025-02-08 08:41:43,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:43,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:41:43,940 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:41:43,940 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:43,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:41:43,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:43,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089973351] [2025-02-08 08:41:43,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089973351] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:43,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:43,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 08:41:43,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616916671] [2025-02-08 08:41:43,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:43,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:41:43,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:43,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:41:43,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-02-08 08:41:44,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:41:44,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 130 transitions, 1177 flow. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 08:41:44,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:44,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:41:44,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:48,000 INFO L124 PetriNetUnfolderBase]: 30907/48651 cut-off events. [2025-02-08 08:41:48,000 INFO L125 PetriNetUnfolderBase]: For 251787/251787 co-relation queries the response was YES. [2025-02-08 08:41:48,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193616 conditions, 48651 events. 30907/48651 cut-off events. For 251787/251787 co-relation queries the response was YES. Maximal size of possible extension queue 1512. Compared 376440 event pairs, 11902 based on Foata normal form. 456/46786 useless extension candidates. Maximal degree in co-relation 157912. Up to 28071 conditions per place. [2025-02-08 08:41:48,339 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 261 selfloop transitions, 46 changer transitions 0/323 dead transitions. [2025-02-08 08:41:48,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 323 transitions, 3648 flow [2025-02-08 08:41:48,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:41:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:41:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 287 transitions. [2025-02-08 08:41:48,341 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6949152542372882 [2025-02-08 08:41:48,341 INFO L175 Difference]: Start difference. First operand has 132 places, 130 transitions, 1177 flow. Second operand 7 states and 287 transitions. [2025-02-08 08:41:48,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 323 transitions, 3648 flow [2025-02-08 08:41:49,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 323 transitions, 3553 flow, removed 42 selfloop flow, removed 5 redundant places. [2025-02-08 08:41:49,425 INFO L231 Difference]: Finished difference. Result has 136 places, 159 transitions, 1723 flow [2025-02-08 08:41:49,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1723, PETRI_PLACES=136, PETRI_TRANSITIONS=159} [2025-02-08 08:41:49,426 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2025-02-08 08:41:49,426 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 159 transitions, 1723 flow [2025-02-08 08:41:49,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 08:41:49,426 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:49,426 INFO L206 CegarLoopForPetriNet]: trace histogram [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 08:41:49,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-08 08:41:49,426 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:49,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:49,427 INFO L85 PathProgramCache]: Analyzing trace with hash -283582295, now seen corresponding path program 1 times [2025-02-08 08:41:49,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:49,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376889110] [2025-02-08 08:41:49,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:49,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:49,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:41:49,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:41:49,440 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:49,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:49,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:49,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376889110] [2025-02-08 08:41:49,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376889110] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:49,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512675842] [2025-02-08 08:41:49,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:49,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:49,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:49,487 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 08:41:49,490 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 08:41:49,527 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:41:49,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:41:49,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:49,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:49,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:41:49,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:49,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512675842] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:49,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:49,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2025-02-08 08:41:49,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475132529] [2025-02-08 08:41:49,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:49,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:41:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:49,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:41:49,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:41:49,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:41:49,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 159 transitions, 1723 flow. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 08:41:49,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:49,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:41:49,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:54,008 INFO L124 PetriNetUnfolderBase]: 29909/47771 cut-off events. [2025-02-08 08:41:54,008 INFO L125 PetriNetUnfolderBase]: For 284319/284324 co-relation queries the response was YES. [2025-02-08 08:41:54,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195592 conditions, 47771 events. 29909/47771 cut-off events. For 284319/284324 co-relation queries the response was YES. Maximal size of possible extension queue 1516. Compared 378047 event pairs, 8720 based on Foata normal form. 622/45999 useless extension candidates. Maximal degree in co-relation 161363. Up to 21051 conditions per place. [2025-02-08 08:41:54,326 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 126 selfloop transitions, 57 changer transitions 0/199 dead transitions. [2025-02-08 08:41:54,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2419 flow [2025-02-08 08:41:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:41:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:41:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2025-02-08 08:41:54,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6129943502824858 [2025-02-08 08:41:54,327 INFO L175 Difference]: Start difference. First operand has 136 places, 159 transitions, 1723 flow. Second operand 6 states and 217 transitions. [2025-02-08 08:41:54,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2419 flow [2025-02-08 08:41:56,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 2336 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-08 08:41:56,217 INFO L231 Difference]: Finished difference. Result has 136 places, 156 transitions, 1737 flow [2025-02-08 08:41:56,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1737, PETRI_PLACES=136, PETRI_TRANSITIONS=156} [2025-02-08 08:41:56,219 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2025-02-08 08:41:56,219 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 156 transitions, 1737 flow [2025-02-08 08:41:56,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 08:41:56,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:56,219 INFO L206 CegarLoopForPetriNet]: trace histogram [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 08:41:56,225 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 08:41:56,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:56,420 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:56,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:56,420 INFO L85 PathProgramCache]: Analyzing trace with hash -389355490, now seen corresponding path program 1 times [2025-02-08 08:41:56,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:56,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243417518] [2025-02-08 08:41:56,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:56,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:56,425 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:41:56,432 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:41:56,432 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:56,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:56,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:56,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243417518] [2025-02-08 08:41:56,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243417518] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:56,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419756031] [2025-02-08 08:41:56,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:56,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:56,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:56,493 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 08:41:56,498 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 08:41:56,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:41:56,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:41:56,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:56,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:56,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:41:56,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:56,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:56,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419756031] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:56,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:56,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2025-02-08 08:41:56,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214542368] [2025-02-08 08:41:56,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:56,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:41:56,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:56,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:41:56,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:41:56,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:41:56,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 156 transitions, 1737 flow. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 08:41:56,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:56,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:41:56,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:42:00,269 INFO L124 PetriNetUnfolderBase]: 26200/45326 cut-off events. [2025-02-08 08:42:00,269 INFO L125 PetriNetUnfolderBase]: For 271519/271543 co-relation queries the response was YES. [2025-02-08 08:42:00,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173429 conditions, 45326 events. 26200/45326 cut-off events. For 271519/271543 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 395691 event pairs, 8912 based on Foata normal form. 0/41482 useless extension candidates. Maximal degree in co-relation 142188. Up to 19382 conditions per place. [2025-02-08 08:42:00,806 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 425 selfloop transitions, 53 changer transitions 0/494 dead transitions. [2025-02-08 08:42:00,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 494 transitions, 6823 flow [2025-02-08 08:42:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:42:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:42:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 381 transitions. [2025-02-08 08:42:00,807 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6457627118644068 [2025-02-08 08:42:00,807 INFO L175 Difference]: Start difference. First operand has 136 places, 156 transitions, 1737 flow. Second operand 10 states and 381 transitions. [2025-02-08 08:42:00,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 494 transitions, 6823 flow [2025-02-08 08:42:01,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 494 transitions, 6570 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-08 08:42:01,650 INFO L231 Difference]: Finished difference. Result has 143 places, 184 transitions, 2076 flow [2025-02-08 08:42:01,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2076, PETRI_PLACES=143, PETRI_TRANSITIONS=184} [2025-02-08 08:42:01,651 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 85 predicate places. [2025-02-08 08:42:01,651 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 184 transitions, 2076 flow [2025-02-08 08:42:01,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 08:42:01,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:42:01,651 INFO L206 CegarLoopForPetriNet]: trace histogram [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 08:42:01,657 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 08:42:01,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-08 08:42:01,856 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:42:01,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:42:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1352185448, now seen corresponding path program 2 times [2025-02-08 08:42:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:42:01,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538350269] [2025-02-08 08:42:01,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:42:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:42:01,865 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 08:42:01,869 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:42:01,869 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:42:01,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:42:01,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:42:01,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538350269] [2025-02-08 08:42:01,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538350269] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:42:01,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912773605] [2025-02-08 08:42:01,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:42:01,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:01,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:42:01,913 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 08:42:01,915 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 08:42:01,957 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 08:42:01,979 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:42:01,979 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:42:01,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:01,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:42:01,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:42:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:42:02,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:42:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:42:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912773605] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:42:02,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:42:02,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 14 [2025-02-08 08:42:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860516472] [2025-02-08 08:42:02,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:42:02,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:42:02,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:42:02,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:42:02,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:42:02,127 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2025-02-08 08:42:02,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 184 transitions, 2076 flow. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 08:42:02,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:42:02,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2025-02-08 08:42:02,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand