./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:08:38,561 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:08:38,645 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:08:38,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:08:38,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:08:38,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:08:38,677 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:08:38,678 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:08:38,678 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:08:38,678 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:08:38,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:08:38,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:08:38,680 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:08:38,680 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:08:38,680 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:08:38,680 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:08:38,680 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:08:38,680 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:08:38,680 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:08:38,681 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:08:38,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:08:38,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:08:38,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:08:38,682 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:08:38,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:08:38,682 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:08:38,682 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:08:38,682 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:08:38,682 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:08:38,682 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 -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2025-02-06 13:08:38,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:08:38,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:08:38,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:08:38,996 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:08:38,997 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:08:38,998 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2025-02-06 13:08:40,318 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a9f7c9204/c6dc20abc3614ea79eb90056260c5229/FLAG206ba6667 [2025-02-06 13:08:40,641 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:08:40,646 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2025-02-06 13:08:40,660 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a9f7c9204/c6dc20abc3614ea79eb90056260c5229/FLAG206ba6667 [2025-02-06 13:08:40,684 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a9f7c9204/c6dc20abc3614ea79eb90056260c5229 [2025-02-06 13:08:40,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:08:40,689 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:08:40,692 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:08:40,693 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:08:40,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:08:40,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:40,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dba5444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40, skipping insertion in model container [2025-02-06 13:08:40,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:40,718 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:08:40,888 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:08:40,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:08:40,906 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:08:40,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:08:40,946 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:08:40,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40 WrapperNode [2025-02-06 13:08:40,947 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:08:40,948 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:08:40,948 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:08:40,948 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:08:40,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:40,959 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:40,982 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 177 [2025-02-06 13:08:40,983 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:08:40,984 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:08:40,984 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:08:40,984 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:08:40,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:40,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:40,994 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:41,009 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-06 13:08:41,010 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:41,010 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:41,016 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:41,018 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:41,019 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:41,020 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:41,023 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:08:41,024 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:08:41,024 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:08:41,024 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:08:41,025 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (1/1) ... [2025-02-06 13:08:41,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:08:41,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:41,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:08:41,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:08:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:08:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:08:41,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:08:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:08:41,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:08:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:08:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:08:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:08:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:08:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:08:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:08:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:08:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:08:41,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:08:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:08:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:08:41,078 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:08:41,177 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:08:41,179 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:08:41,592 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:08:41,593 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:08:41,854 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:08:41,854 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:08:41,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:08:41 BoogieIcfgContainer [2025-02-06 13:08:41,855 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:08:41,857 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:08:41,858 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:08:41,862 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:08:41,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:08:40" (1/3) ... [2025-02-06 13:08:41,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70abad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:08:41, skipping insertion in model container [2025-02-06 13:08:41,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:40" (2/3) ... [2025-02-06 13:08:41,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70abad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:08:41, skipping insertion in model container [2025-02-06 13:08:41,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:08:41" (3/3) ... [2025-02-06 13:08:41,866 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2025-02-06 13:08:41,879 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:08:41,881 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-dec-subseq.wvr.c that has 3 procedures, 49 locations, 1 initial locations, 4 loop locations, and 18 error locations. [2025-02-06 13:08:41,881 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:08:41,960 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 13:08:41,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 120 flow [2025-02-06 13:08:42,036 INFO L124 PetriNetUnfolderBase]: 5/51 cut-off events. [2025-02-06 13:08:42,039 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:08:42,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 51 events. 5/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 134 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2025-02-06 13:08:42,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 53 transitions, 120 flow [2025-02-06 13:08:42,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 50 transitions, 112 flow [2025-02-06 13:08:42,059 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:08:42,072 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;@48cbd3fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:08:42,072 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2025-02-06 13:08:42,076 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:08:42,076 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:08:42,077 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:08:42,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:42,078 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:08:42,078 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:42,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash 517800, now seen corresponding path program 1 times [2025-02-06 13:08:42,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:42,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811309889] [2025-02-06 13:08:42,093 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:42,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:42,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:08:42,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:08:42,194 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:42,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:42,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:42,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811309889] [2025-02-06 13:08:42,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811309889] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:42,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:42,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:08:42,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310217671] [2025-02-06 13:08:42,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:42,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:42,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:42,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:42,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:42,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-06 13:08:42,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:42,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:42,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-06 13:08:42,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:42,612 INFO L124 PetriNetUnfolderBase]: 285/545 cut-off events. [2025-02-06 13:08:42,612 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-06 13:08:42,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 545 events. 285/545 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2938 event pairs, 200 based on Foata normal form. 1/350 useless extension candidates. Maximal degree in co-relation 969. Up to 454 conditions per place. [2025-02-06 13:08:42,620 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 30 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2025-02-06 13:08:42,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 168 flow [2025-02-06 13:08:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2025-02-06 13:08:42,632 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2025-02-06 13:08:42,633 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 86 transitions. [2025-02-06 13:08:42,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 168 flow [2025-02-06 13:08:42,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 160 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:08:42,643 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 100 flow [2025-02-06 13:08:42,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2025-02-06 13:08:42,652 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2025-02-06 13:08:42,652 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 100 flow [2025-02-06 13:08:42,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:42,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:42,653 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:08:42,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:08:42,654 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:42,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash 517801, now seen corresponding path program 1 times [2025-02-06 13:08:42,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:42,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48436435] [2025-02-06 13:08:42,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:42,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:42,673 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:08:42,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:08:42,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:42,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:43,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:43,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48436435] [2025-02-06 13:08:43,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48436435] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:43,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:43,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:43,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118474182] [2025-02-06 13:08:43,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:43,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:43,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:43,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:43,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:43,093 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-06 13:08:43,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:43,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:43,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-06 13:08:43,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:43,264 INFO L124 PetriNetUnfolderBase]: 286/548 cut-off events. [2025-02-06 13:08:43,265 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:08:43,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 548 events. 286/548 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2942 event pairs, 200 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 999. Up to 463 conditions per place. [2025-02-06 13:08:43,274 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 33 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2025-02-06 13:08:43,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 180 flow [2025-02-06 13:08:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:43,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2025-02-06 13:08:43,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-06 13:08:43,276 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 100 flow. Second operand 4 states and 106 transitions. [2025-02-06 13:08:43,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 180 flow [2025-02-06 13:08:43,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:43,281 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 123 flow [2025-02-06 13:08:43,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2025-02-06 13:08:43,283 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2025-02-06 13:08:43,284 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 123 flow [2025-02-06 13:08:43,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:43,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:43,284 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:08:43,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:08:43,286 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:43,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:43,288 INFO L85 PathProgramCache]: Analyzing trace with hash 16052759, now seen corresponding path program 1 times [2025-02-06 13:08:43,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:43,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744490132] [2025-02-06 13:08:43,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:43,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:43,300 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:08:43,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:08:43,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:43,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:43,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:43,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744490132] [2025-02-06 13:08:43,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744490132] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:43,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:43,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:43,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859232895] [2025-02-06 13:08:43,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:43,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:08:43,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:43,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:08:43,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:08:43,661 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-06 13:08:43,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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) [2025-02-06 13:08:43,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:43,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-06 13:08:43,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:43,857 INFO L124 PetriNetUnfolderBase]: 287/551 cut-off events. [2025-02-06 13:08:43,858 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 13:08:43,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 551 events. 287/551 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2970 event pairs, 200 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 1020. Up to 462 conditions per place. [2025-02-06 13:08:43,864 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 33 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2025-02-06 13:08:43,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 209 flow [2025-02-06 13:08:43,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2025-02-06 13:08:43,867 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47547169811320755 [2025-02-06 13:08:43,867 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 123 flow. Second operand 5 states and 126 transitions. [2025-02-06 13:08:43,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 209 flow [2025-02-06 13:08:43,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:43,870 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 157 flow [2025-02-06 13:08:43,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2025-02-06 13:08:43,872 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2025-02-06 13:08:43,872 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 157 flow [2025-02-06 13:08:43,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 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) [2025-02-06 13:08:43,873 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:43,873 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:08:43,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:08:43,873 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:43,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash 16052792, now seen corresponding path program 1 times [2025-02-06 13:08:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:43,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494989890] [2025-02-06 13:08:43,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:43,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:43,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:08:43,888 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:08:43,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:43,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:43,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:43,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494989890] [2025-02-06 13:08:43,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494989890] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:43,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:43,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:43,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403811859] [2025-02-06 13:08:43,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:43,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:43,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:43,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:43,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:44,011 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2025-02-06 13:08:44,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 157 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:44,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:44,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2025-02-06 13:08:44,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:44,125 INFO L124 PetriNetUnfolderBase]: 272/497 cut-off events. [2025-02-06 13:08:44,125 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-02-06 13:08:44,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 497 events. 272/497 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2418 event pairs, 200 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 960. Up to 439 conditions per place. [2025-02-06 13:08:44,131 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 35 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2025-02-06 13:08:44,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 225 flow [2025-02-06 13:08:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2025-02-06 13:08:44,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2025-02-06 13:08:44,133 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 157 flow. Second operand 4 states and 88 transitions. [2025-02-06 13:08:44,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 225 flow [2025-02-06 13:08:44,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:44,136 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 154 flow [2025-02-06 13:08:44,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=49, 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=154, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2025-02-06 13:08:44,137 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2025-02-06 13:08:44,137 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 154 flow [2025-02-06 13:08:44,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:44,137 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:44,137 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:08:44,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:08:44,137 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:44,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash 16052793, now seen corresponding path program 1 times [2025-02-06 13:08:44,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:44,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692164210] [2025-02-06 13:08:44,138 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:44,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:44,144 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:08:44,152 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:08:44,153 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:44,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:44,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:44,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692164210] [2025-02-06 13:08:44,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692164210] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:44,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:44,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:44,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615275343] [2025-02-06 13:08:44,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:44,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:44,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:44,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:44,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:44,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-06 13:08:44,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:44,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:44,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-06 13:08:44,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:44,336 INFO L124 PetriNetUnfolderBase]: 263/486 cut-off events. [2025-02-06 13:08:44,336 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-06 13:08:44,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 486 events. 263/486 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2451 event pairs, 179 based on Foata normal form. 1/339 useless extension candidates. Maximal degree in co-relation 923. Up to 423 conditions per place. [2025-02-06 13:08:44,339 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 33 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2025-02-06 13:08:44,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 219 flow [2025-02-06 13:08:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:44,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2025-02-06 13:08:44,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5723270440251572 [2025-02-06 13:08:44,342 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 154 flow. Second operand 3 states and 91 transitions. [2025-02-06 13:08:44,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 219 flow [2025-02-06 13:08:44,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:44,344 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 150 flow [2025-02-06 13:08:44,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2025-02-06 13:08:44,345 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2025-02-06 13:08:44,345 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 150 flow [2025-02-06 13:08:44,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:44,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:44,345 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:08:44,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:08:44,345 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:44,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash 497622920, now seen corresponding path program 1 times [2025-02-06 13:08:44,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:44,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858919666] [2025-02-06 13:08:44,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:44,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:44,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:08:44,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:08:44,364 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:44,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:44,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:44,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858919666] [2025-02-06 13:08:44,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858919666] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:44,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296791647] [2025-02-06 13:08:44,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:44,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:44,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:44,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:44,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:08:44,620 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:08:44,636 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:08:44,636 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:44,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:44,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:08:44,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:44,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:08:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:44,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:44,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296791647] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:44,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:44,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:08:44,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480321393] [2025-02-06 13:08:44,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:44,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:08:44,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:44,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:08:44,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:08:45,087 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-06 13:08:45,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 150 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:45,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:45,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-06 13:08:45,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:45,344 INFO L124 PetriNetUnfolderBase]: 264/488 cut-off events. [2025-02-06 13:08:45,344 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-02-06 13:08:45,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 488 events. 264/488 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2437 event pairs, 179 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 925. Up to 423 conditions per place. [2025-02-06 13:08:45,348 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 30 selfloop transitions, 10 changer transitions 0/49 dead transitions. [2025-02-06 13:08:45,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 243 flow [2025-02-06 13:08:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:08:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:08:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2025-02-06 13:08:45,350 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2025-02-06 13:08:45,350 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 150 flow. Second operand 8 states and 176 transitions. [2025-02-06 13:08:45,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 243 flow [2025-02-06 13:08:45,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:45,355 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 179 flow [2025-02-06 13:08:45,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2025-02-06 13:08:45,356 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2025-02-06 13:08:45,356 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 179 flow [2025-02-06 13:08:45,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:45,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:45,356 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 13:08:45,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 13:08:45,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:45,557 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:45,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1753152194, now seen corresponding path program 1 times [2025-02-06 13:08:45,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:45,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445564589] [2025-02-06 13:08:45,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:45,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:45,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:08:45,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:08:45,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:45,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:45,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:45,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445564589] [2025-02-06 13:08:45,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445564589] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:45,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731587969] [2025-02-06 13:08:45,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:45,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:45,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:45,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:45,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:08:45,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:08:45,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:08:45,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:45,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:45,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:08:45,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:45,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:08:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:46,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:46,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731587969] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:46,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:46,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:08:46,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023288130] [2025-02-06 13:08:46,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:46,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:08:46,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:46,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:08:46,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:08:46,479 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-06 13:08:46,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 179 flow. Second operand has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:46,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:46,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-06 13:08:46,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:46,852 INFO L124 PetriNetUnfolderBase]: 264/487 cut-off events. [2025-02-06 13:08:46,852 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 13:08:46,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 487 events. 264/487 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2423 event pairs, 179 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 923. Up to 414 conditions per place. [2025-02-06 13:08:46,856 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 25 selfloop transitions, 14 changer transitions 0/48 dead transitions. [2025-02-06 13:08:46,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 48 transitions, 253 flow [2025-02-06 13:08:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:08:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:08:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2025-02-06 13:08:46,858 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42048517520215634 [2025-02-06 13:08:46,858 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 179 flow. Second operand 7 states and 156 transitions. [2025-02-06 13:08:46,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 48 transitions, 253 flow [2025-02-06 13:08:46,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 207 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-06 13:08:46,860 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 157 flow [2025-02-06 13:08:46,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=157, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2025-02-06 13:08:46,860 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2025-02-06 13:08:46,864 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 157 flow [2025-02-06 13:08:46,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:46,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:46,865 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:08:46,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:08:47,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:47,066 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:47,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:47,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1753152160, now seen corresponding path program 1 times [2025-02-06 13:08:47,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:47,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106924224] [2025-02-06 13:08:47,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:47,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:47,075 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:08:47,086 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:08:47,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:47,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:47,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:47,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106924224] [2025-02-06 13:08:47,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106924224] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:47,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835517798] [2025-02-06 13:08:47,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:47,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:47,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:47,196 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:47,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:08:47,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:08:47,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:08:47,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:47,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:47,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:08:47,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:47,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:47,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-06 13:08:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:47,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835517798] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:47,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:47,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-06 13:08:47,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227292639] [2025-02-06 13:08:47,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:47,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 13:08:47,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:47,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 13:08:47,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 13:08:47,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2025-02-06 13:08:47,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 157 flow. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:47,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:47,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2025-02-06 13:08:47,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:47,594 INFO L124 PetriNetUnfolderBase]: 264/486 cut-off events. [2025-02-06 13:08:47,595 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-02-06 13:08:47,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 486 events. 264/486 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2426 event pairs, 179 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 903. Up to 414 conditions per place. [2025-02-06 13:08:47,598 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 33 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2025-02-06 13:08:47,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 47 transitions, 233 flow [2025-02-06 13:08:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2025-02-06 13:08:47,600 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2025-02-06 13:08:47,600 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 157 flow. Second operand 5 states and 127 transitions. [2025-02-06 13:08:47,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 47 transitions, 233 flow [2025-02-06 13:08:47,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 208 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-02-06 13:08:47,602 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 142 flow [2025-02-06 13:08:47,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2025-02-06 13:08:47,602 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2025-02-06 13:08:47,602 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 142 flow [2025-02-06 13:08:47,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:47,606 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:47,606 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:47,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 13:08:47,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:47,806 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:47,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1002766472, now seen corresponding path program 1 times [2025-02-06 13:08:47,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:47,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460454595] [2025-02-06 13:08:47,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:47,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:08:47,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:08:47,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:47,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:47,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460454595] [2025-02-06 13:08:47,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460454595] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107835095] [2025-02-06 13:08:47,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:47,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:47,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:47,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:47,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:08:47,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:08:47,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:08:47,997 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:47,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:47,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 13:08:47,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:48,036 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:08:48,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107835095] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:48,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:08:48,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2025-02-06 13:08:48,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244338184] [2025-02-06 13:08:48,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:48,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:48,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:48,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:48,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-02-06 13:08:48,061 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2025-02-06 13:08:48,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:48,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:48,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2025-02-06 13:08:48,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:48,220 INFO L124 PetriNetUnfolderBase]: 488/848 cut-off events. [2025-02-06 13:08:48,220 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:08:48,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1717 conditions, 848 events. 488/848 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4333 event pairs, 159 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 1660. Up to 478 conditions per place. [2025-02-06 13:08:48,225 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 61 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2025-02-06 13:08:48,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 69 transitions, 317 flow [2025-02-06 13:08:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2025-02-06 13:08:48,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5613207547169812 [2025-02-06 13:08:48,227 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 142 flow. Second operand 4 states and 119 transitions. [2025-02-06 13:08:48,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 69 transitions, 317 flow [2025-02-06 13:08:48,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:08:48,229 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 149 flow [2025-02-06 13:08:48,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2025-02-06 13:08:48,230 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2025-02-06 13:08:48,230 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 149 flow [2025-02-06 13:08:48,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:48,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:48,230 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:48,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 13:08:48,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-06 13:08:48,435 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:48,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:48,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1585919529, now seen corresponding path program 1 times [2025-02-06 13:08:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:48,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115894157] [2025-02-06 13:08:48,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:48,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:48,442 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:08:48,450 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:08:48,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:48,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:48,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:48,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115894157] [2025-02-06 13:08:48,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115894157] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:48,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:48,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:48,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407465237] [2025-02-06 13:08:48,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:48,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:48,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:48,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:48,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:48,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-06 13:08:48,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:48,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:48,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-06 13:08:48,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:48,686 INFO L124 PetriNetUnfolderBase]: 473/915 cut-off events. [2025-02-06 13:08:48,686 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-06 13:08:48,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1914 conditions, 915 events. 473/915 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5364 event pairs, 381 based on Foata normal form. 37/754 useless extension candidates. Maximal degree in co-relation 1468. Up to 664 conditions per place. [2025-02-06 13:08:48,694 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 55 selfloop transitions, 4 changer transitions 1/68 dead transitions. [2025-02-06 13:08:48,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 334 flow [2025-02-06 13:08:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2025-02-06 13:08:48,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2025-02-06 13:08:48,696 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 149 flow. Second operand 5 states and 155 transitions. [2025-02-06 13:08:48,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 334 flow [2025-02-06 13:08:48,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:48,698 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 177 flow [2025-02-06 13:08:48,698 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2025-02-06 13:08:48,702 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2025-02-06 13:08:48,702 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 177 flow [2025-02-06 13:08:48,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:48,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:48,704 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:48,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:08:48,704 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:48,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:48,705 INFO L85 PathProgramCache]: Analyzing trace with hash -490829782, now seen corresponding path program 1 times [2025-02-06 13:08:48,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:48,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637325960] [2025-02-06 13:08:48,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:48,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:48,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:08:48,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:08:48,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:48,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:48,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:48,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637325960] [2025-02-06 13:08:48,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637325960] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:48,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154149770] [2025-02-06 13:08:48,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:48,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:48,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:48,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:48,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 13:08:49,001 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:08:49,023 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:08:49,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:49,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:49,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 13:08:49,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:49,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:08:49,109 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 13:08:49,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2025-02-06 13:08:49,125 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:08:49,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:08:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:49,201 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:08:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154149770] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:49,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:08:49,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 7 [2025-02-06 13:08:49,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324129834] [2025-02-06 13:08:49,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:49,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:08:49,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:49,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:08:49,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:08:49,256 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2025-02-06 13:08:49,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:49,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:49,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2025-02-06 13:08:49,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:49,403 INFO L124 PetriNetUnfolderBase]: 382/758 cut-off events. [2025-02-06 13:08:49,404 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2025-02-06 13:08:49,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 758 events. 382/758 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4262 event pairs, 300 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 1298. Up to 654 conditions per place. [2025-02-06 13:08:49,409 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 34 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2025-02-06 13:08:49,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 247 flow [2025-02-06 13:08:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2025-02-06 13:08:49,410 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4377358490566038 [2025-02-06 13:08:49,410 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 177 flow. Second operand 5 states and 116 transitions. [2025-02-06 13:08:49,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 247 flow [2025-02-06 13:08:49,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:49,413 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 174 flow [2025-02-06 13:08:49,413 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2025-02-06 13:08:49,413 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2025-02-06 13:08:49,413 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 174 flow [2025-02-06 13:08:49,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:49,414 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:49,414 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:49,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 13:08:49,618 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 [2025-02-06 13:08:49,618 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:49,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash -490829783, now seen corresponding path program 1 times [2025-02-06 13:08:49,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:49,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905512837] [2025-02-06 13:08:49,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:49,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:49,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:08:49,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:08:49,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:49,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:08:49,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:49,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905512837] [2025-02-06 13:08:49,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905512837] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:49,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:49,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:08:49,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815395922] [2025-02-06 13:08:49,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:49,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:08:49,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:49,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:08:49,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:08:49,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2025-02-06 13:08:49,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 174 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:49,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:49,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2025-02-06 13:08:49,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:49,931 INFO L124 PetriNetUnfolderBase]: 355/691 cut-off events. [2025-02-06 13:08:49,932 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-02-06 13:08:49,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 691 events. 355/691 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3500 event pairs, 279 based on Foata normal form. 0/638 useless extension candidates. Maximal degree in co-relation 1035. Up to 615 conditions per place. [2025-02-06 13:08:49,936 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 33 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2025-02-06 13:08:49,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 45 transitions, 242 flow [2025-02-06 13:08:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:49,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2025-02-06 13:08:49,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2025-02-06 13:08:49,937 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 174 flow. Second operand 5 states and 110 transitions. [2025-02-06 13:08:49,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 45 transitions, 242 flow [2025-02-06 13:08:49,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 233 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:08:49,939 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 167 flow [2025-02-06 13:08:49,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2025-02-06 13:08:49,941 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2025-02-06 13:08:49,941 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 167 flow [2025-02-06 13:08:49,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:49,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:49,942 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:49,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 13:08:49,942 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:49,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:49,942 INFO L85 PathProgramCache]: Analyzing trace with hash -644673072, now seen corresponding path program 1 times [2025-02-06 13:08:49,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:49,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646076560] [2025-02-06 13:08:49,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:49,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:49,953 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:08:49,958 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:08:49,959 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:49,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:50,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:50,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646076560] [2025-02-06 13:08:50,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646076560] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:50,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029998486] [2025-02-06 13:08:50,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:50,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:50,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:50,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:50,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:08:50,109 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 13:08:50,126 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 13:08:50,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:50,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:50,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:08:50,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:50,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:50,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029998486] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:50,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:50,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-02-06 13:08:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510360318] [2025-02-06 13:08:50,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:50,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:08:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:50,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:08:50,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:08:50,355 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2025-02-06 13:08:50,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 167 flow. Second operand has 15 states, 15 states have (on average 20.066666666666666) internal successors, (301), 15 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:50,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:50,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2025-02-06 13:08:50,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:50,714 INFO L124 PetriNetUnfolderBase]: 549/1077 cut-off events. [2025-02-06 13:08:50,715 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2025-02-06 13:08:50,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2353 conditions, 1077 events. 549/1077 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5996 event pairs, 186 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 1584. Up to 274 conditions per place. [2025-02-06 13:08:50,720 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 82 selfloop transitions, 21 changer transitions 0/110 dead transitions. [2025-02-06 13:08:50,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 110 transitions, 542 flow [2025-02-06 13:08:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:08:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:08:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 295 transitions. [2025-02-06 13:08:50,722 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5060034305317325 [2025-02-06 13:08:50,722 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 167 flow. Second operand 11 states and 295 transitions. [2025-02-06 13:08:50,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 110 transitions, 542 flow [2025-02-06 13:08:50,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 110 transitions, 532 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:08:50,724 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 254 flow [2025-02-06 13:08:50,725 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=254, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2025-02-06 13:08:50,725 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2025-02-06 13:08:50,725 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 254 flow [2025-02-06 13:08:50,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.066666666666666) internal successors, (301), 15 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:50,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:50,725 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:50,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 13:08:50,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-06 13:08:50,927 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:50,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1497014327, now seen corresponding path program 2 times [2025-02-06 13:08:50,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:50,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567435939] [2025-02-06 13:08:50,928 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:08:50,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:50,935 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:08:50,945 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:08:50,945 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:08:50,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:51,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567435939] [2025-02-06 13:08:51,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567435939] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124971761] [2025-02-06 13:08:51,156 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:08:51,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:51,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:51,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:51,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:08:51,208 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 13:08:51,227 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:08:51,227 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:08:51,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:51,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 13:08:51,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:51,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:08:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:51,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:51,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124971761] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:51,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:51,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2025-02-06 13:08:51,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528046326] [2025-02-06 13:08:51,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:51,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 13:08:51,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:51,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 13:08:51,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2025-02-06 13:08:51,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2025-02-06 13:08:51,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 254 flow. Second operand has 19 states, 19 states have (on average 15.0) internal successors, (285), 19 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:51,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:51,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2025-02-06 13:08:51,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:52,405 INFO L124 PetriNetUnfolderBase]: 737/1413 cut-off events. [2025-02-06 13:08:52,405 INFO L125 PetriNetUnfolderBase]: For 295/295 co-relation queries the response was YES. [2025-02-06 13:08:52,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3326 conditions, 1413 events. 737/1413 cut-off events. For 295/295 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 7888 event pairs, 246 based on Foata normal form. 68/1381 useless extension candidates. Maximal degree in co-relation 2178. Up to 290 conditions per place. [2025-02-06 13:08:52,414 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 89 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2025-02-06 13:08:52,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 605 flow [2025-02-06 13:08:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:08:52,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:08:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2025-02-06 13:08:52,416 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4490566037735849 [2025-02-06 13:08:52,416 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 254 flow. Second operand 10 states and 238 transitions. [2025-02-06 13:08:52,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 605 flow [2025-02-06 13:08:52,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 110 transitions, 599 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:52,420 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 295 flow [2025-02-06 13:08:52,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=295, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2025-02-06 13:08:52,420 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2025-02-06 13:08:52,420 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 295 flow [2025-02-06 13:08:52,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.0) internal successors, (285), 19 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:52,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:52,421 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:52,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 13:08:52,625 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 [2025-02-06 13:08:52,625 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:52,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2000305800, now seen corresponding path program 1 times [2025-02-06 13:08:52,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:52,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467662685] [2025-02-06 13:08:52,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:52,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:52,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:08:52,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:08:52,638 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:52,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467662685] [2025-02-06 13:08:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467662685] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:52,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:52,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537360848] [2025-02-06 13:08:52,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:52,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:52,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:52,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:52,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2025-02-06 13:08:52,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:52,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:52,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2025-02-06 13:08:52,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:52,867 INFO L124 PetriNetUnfolderBase]: 645/1261 cut-off events. [2025-02-06 13:08:52,867 INFO L125 PetriNetUnfolderBase]: For 785/785 co-relation queries the response was YES. [2025-02-06 13:08:52,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3163 conditions, 1261 events. 645/1261 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6963 event pairs, 186 based on Foata normal form. 40/1193 useless extension candidates. Maximal degree in co-relation 2061. Up to 712 conditions per place. [2025-02-06 13:08:52,877 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 52 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2025-02-06 13:08:52,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 433 flow [2025-02-06 13:08:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:52,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-02-06 13:08:52,879 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2025-02-06 13:08:52,879 INFO L175 Difference]: Start difference. First operand has 74 places, 53 transitions, 295 flow. Second operand 4 states and 114 transitions. [2025-02-06 13:08:52,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 433 flow [2025-02-06 13:08:52,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 64 transitions, 408 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-02-06 13:08:52,882 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 271 flow [2025-02-06 13:08:52,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2025-02-06 13:08:52,883 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 20 predicate places. [2025-02-06 13:08:52,883 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 271 flow [2025-02-06 13:08:52,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:52,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:52,883 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:52,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:08:52,884 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:52,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash -20758017, now seen corresponding path program 3 times [2025-02-06 13:08:52,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:52,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999196512] [2025-02-06 13:08:52,884 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:08:52,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:52,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-02-06 13:08:52,901 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 20 statements. [2025-02-06 13:08:52,901 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:08:52,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:08:53,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:53,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999196512] [2025-02-06 13:08:53,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999196512] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:53,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550909676] [2025-02-06 13:08:53,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:08:53,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:53,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:53,069 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:53,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 13:08:53,118 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-02-06 13:08:53,138 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 20 statements. [2025-02-06 13:08:53,138 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:08:53,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:53,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:08:53,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:08:53,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:53,401 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 [2025-02-06 13:08:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:08:53,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550909676] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:53,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:53,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-06 13:08:53,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533459872] [2025-02-06 13:08:53,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:53,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 13:08:53,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:53,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 13:08:53,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-02-06 13:08:53,653 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2025-02-06 13:08:53,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 271 flow. Second operand has 15 states, 15 states have (on average 17.333333333333332) internal successors, (260), 15 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:53,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:53,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2025-02-06 13:08:53,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:53,977 INFO L124 PetriNetUnfolderBase]: 749/1365 cut-off events. [2025-02-06 13:08:53,978 INFO L125 PetriNetUnfolderBase]: For 595/595 co-relation queries the response was YES. [2025-02-06 13:08:53,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 1365 events. 749/1365 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7096 event pairs, 60 based on Foata normal form. 20/1292 useless extension candidates. Maximal degree in co-relation 2255. Up to 450 conditions per place. [2025-02-06 13:08:54,018 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 59 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2025-02-06 13:08:54,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 492 flow [2025-02-06 13:08:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:08:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:08:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2025-02-06 13:08:54,022 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42452830188679247 [2025-02-06 13:08:54,022 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 271 flow. Second operand 8 states and 180 transitions. [2025-02-06 13:08:54,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 492 flow [2025-02-06 13:08:54,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 476 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:08:54,026 INFO L231 Difference]: Finished difference. Result has 75 places, 52 transitions, 303 flow [2025-02-06 13:08:54,026 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2025-02-06 13:08:54,027 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2025-02-06 13:08:54,027 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 303 flow [2025-02-06 13:08:54,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.333333333333332) internal successors, (260), 15 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:54,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:54,029 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:54,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 13:08:54,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 13:08:54,230 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:54,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash 828283760, now seen corresponding path program 1 times [2025-02-06 13:08:54,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:54,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184659696] [2025-02-06 13:08:54,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:54,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:54,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:08:54,246 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:08:54,246 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:54,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:54,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:54,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184659696] [2025-02-06 13:08:54,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184659696] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:54,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:54,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:54,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730159840] [2025-02-06 13:08:54,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:54,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:54,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:54,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:54,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:54,298 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-06 13:08:54,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 303 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:54,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:54,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-06 13:08:54,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:54,480 INFO L124 PetriNetUnfolderBase]: 748/1461 cut-off events. [2025-02-06 13:08:54,481 INFO L125 PetriNetUnfolderBase]: For 1487/1487 co-relation queries the response was YES. [2025-02-06 13:08:54,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3645 conditions, 1461 events. 748/1461 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8535 event pairs, 367 based on Foata normal form. 6/1335 useless extension candidates. Maximal degree in co-relation 2677. Up to 810 conditions per place. [2025-02-06 13:08:54,490 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 53 selfloop transitions, 2 changer transitions 4/68 dead transitions. [2025-02-06 13:08:54,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 493 flow [2025-02-06 13:08:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-02-06 13:08:54,492 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6037735849056604 [2025-02-06 13:08:54,492 INFO L175 Difference]: Start difference. First operand has 75 places, 52 transitions, 303 flow. Second operand 3 states and 96 transitions. [2025-02-06 13:08:54,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 493 flow [2025-02-06 13:08:54,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 463 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-06 13:08:54,497 INFO L231 Difference]: Finished difference. Result has 74 places, 51 transitions, 270 flow [2025-02-06 13:08:54,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=74, PETRI_TRANSITIONS=51} [2025-02-06 13:08:54,497 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2025-02-06 13:08:54,498 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 51 transitions, 270 flow [2025-02-06 13:08:54,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:54,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:54,498 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:54,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-06 13:08:54,499 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:54,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1414428960, now seen corresponding path program 1 times [2025-02-06 13:08:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:54,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119412017] [2025-02-06 13:08:54,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:54,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:54,507 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 13:08:54,514 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 13:08:54,514 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:54,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:08:54,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:54,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119412017] [2025-02-06 13:08:54,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119412017] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:54,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:54,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:54,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397331773] [2025-02-06 13:08:54,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:54,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:54,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:54,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:54,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:54,558 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-06 13:08:54,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 51 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:54,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:54,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-06 13:08:54,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:54,724 INFO L124 PetriNetUnfolderBase]: 637/1242 cut-off events. [2025-02-06 13:08:54,724 INFO L125 PetriNetUnfolderBase]: For 1152/1158 co-relation queries the response was YES. [2025-02-06 13:08:54,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3255 conditions, 1242 events. 637/1242 cut-off events. For 1152/1158 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6662 event pairs, 271 based on Foata normal form. 28/1187 useless extension candidates. Maximal degree in co-relation 3191. Up to 812 conditions per place. [2025-02-06 13:08:54,732 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 50 selfloop transitions, 2 changer transitions 6/67 dead transitions. [2025-02-06 13:08:54,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 67 transitions, 455 flow [2025-02-06 13:08:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-02-06 13:08:54,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6037735849056604 [2025-02-06 13:08:54,733 INFO L175 Difference]: Start difference. First operand has 74 places, 51 transitions, 270 flow. Second operand 3 states and 96 transitions. [2025-02-06 13:08:54,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 67 transitions, 455 flow [2025-02-06 13:08:54,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 451 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:54,737 INFO L231 Difference]: Finished difference. Result has 73 places, 52 transitions, 280 flow [2025-02-06 13:08:54,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=73, PETRI_TRANSITIONS=52} [2025-02-06 13:08:54,737 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2025-02-06 13:08:54,737 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 52 transitions, 280 flow [2025-02-06 13:08:54,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:54,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:54,738 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:54,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-06 13:08:54,738 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:08:54,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:54,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1605528499, now seen corresponding path program 1 times [2025-02-06 13:08:54,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:54,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518015218] [2025-02-06 13:08:54,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:54,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:54,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-06 13:08:54,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 13:08:54,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:54,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:08:55,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:55,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518015218] [2025-02-06 13:08:55,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518015218] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:55,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022584027] [2025-02-06 13:08:55,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:55,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:55,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:55,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:55,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 13:08:55,467 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-06 13:08:55,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 13:08:55,497 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:55,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:55,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 13:08:55,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:55,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:08:55,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-02-06 13:08:55,603 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:08:55,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:08:55,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 13:08:56,141 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2025-02-06 13:08:56,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2025-02-06 13:08:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:56,171 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:57,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:08:57,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2025-02-06 13:08:57,406 INFO L349 Elim1Store]: treesize reduction 9, result has 80.9 percent of original size [2025-02-06 13:08:57,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 181 [2025-02-06 13:08:57,417 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 13:08:57,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:08:57,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 120 [2025-02-06 13:08:57,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:08:57,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2025-02-06 13:08:57,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:08:57,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2025-02-06 13:08:57,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:08:57,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2025-02-06 13:08:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:57,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022584027] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:57,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:57,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 35 [2025-02-06 13:08:57,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341795618] [2025-02-06 13:08:57,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:57,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-06 13:08:57,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:57,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-06 13:08:57,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1000, Unknown=3, NotChecked=0, Total=1260 [2025-02-06 13:09:02,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:09:02,629 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 53 [2025-02-06 13:09:02,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 52 transitions, 280 flow. Second operand has 36 states, 36 states have (on average 7.305555555555555) internal successors, (263), 36 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:09:02,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:02,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 53 [2025-02-06 13:09:02,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:06,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:09:10,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:09:25,022 INFO L124 PetriNetUnfolderBase]: 2907/5007 cut-off events. [2025-02-06 13:09:25,022 INFO L125 PetriNetUnfolderBase]: For 5018/5018 co-relation queries the response was YES. [2025-02-06 13:09:25,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13985 conditions, 5007 events. 2907/5007 cut-off events. For 5018/5018 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 28397 event pairs, 504 based on Foata normal form. 7/4445 useless extension candidates. Maximal degree in co-relation 8194. Up to 922 conditions per place. [2025-02-06 13:09:25,057 INFO L140 encePairwiseOnDemand]: 30/53 looper letters, 271 selfloop transitions, 190 changer transitions 98/562 dead transitions. [2025-02-06 13:09:25,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 562 transitions, 3586 flow [2025-02-06 13:09:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-02-06 13:09:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2025-02-06 13:09:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 836 transitions. [2025-02-06 13:09:25,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.21607650555699148 [2025-02-06 13:09:25,063 INFO L175 Difference]: Start difference. First operand has 73 places, 52 transitions, 280 flow. Second operand 73 states and 836 transitions. [2025-02-06 13:09:25,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 562 transitions, 3586 flow [2025-02-06 13:09:25,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 562 transitions, 3472 flow, removed 54 selfloop flow, removed 2 redundant places. [2025-02-06 13:09:25,081 INFO L231 Difference]: Finished difference. Result has 188 places, 258 transitions, 2263 flow [2025-02-06 13:09:25,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=2263, PETRI_PLACES=188, PETRI_TRANSITIONS=258} [2025-02-06 13:09:25,082 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2025-02-06 13:09:25,082 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 258 transitions, 2263 flow [2025-02-06 13:09:25,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.305555555555555) internal successors, (263), 36 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:09:25,082 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:25,082 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, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:25,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-06 13:09:25,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:25,283 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:09:25,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1329378642, now seen corresponding path program 2 times [2025-02-06 13:09:25,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:25,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773840706] [2025-02-06 13:09:25,283 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:09:25,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:25,296 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-02-06 13:09:25,322 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 13:09:25,322 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:09:25,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-06 13:09:26,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:26,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773840706] [2025-02-06 13:09:26,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773840706] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:26,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:26,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 13:09:26,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958650792] [2025-02-06 13:09:26,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:26,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 13:09:26,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:26,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 13:09:26,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:09:26,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2025-02-06 13:09:26,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 258 transitions, 2263 flow. Second operand has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:09:26,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:26,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2025-02-06 13:09:26,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:27,162 INFO L124 PetriNetUnfolderBase]: 2715/4956 cut-off events. [2025-02-06 13:09:27,163 INFO L125 PetriNetUnfolderBase]: For 38097/38277 co-relation queries the response was YES. [2025-02-06 13:09:27,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26002 conditions, 4956 events. 2715/4956 cut-off events. For 38097/38277 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 29890 event pairs, 213 based on Foata normal form. 11/4758 useless extension candidates. Maximal degree in co-relation 25925. Up to 1246 conditions per place. [2025-02-06 13:09:27,205 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 392 selfloop transitions, 106 changer transitions 13/529 dead transitions. [2025-02-06 13:09:27,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 529 transitions, 5848 flow [2025-02-06 13:09:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:09:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:09:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 375 transitions. [2025-02-06 13:09:27,207 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5053908355795148 [2025-02-06 13:09:27,207 INFO L175 Difference]: Start difference. First operand has 188 places, 258 transitions, 2263 flow. Second operand 14 states and 375 transitions. [2025-02-06 13:09:27,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 529 transitions, 5848 flow [2025-02-06 13:09:27,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 529 transitions, 5369 flow, removed 199 selfloop flow, removed 10 redundant places. [2025-02-06 13:09:27,385 INFO L231 Difference]: Finished difference. Result has 190 places, 324 transitions, 2930 flow [2025-02-06 13:09:27,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2930, PETRI_PLACES=190, PETRI_TRANSITIONS=324} [2025-02-06 13:09:27,386 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 138 predicate places. [2025-02-06 13:09:27,386 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 324 transitions, 2930 flow [2025-02-06 13:09:27,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:09:27,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:27,387 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:27,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-02-06 13:09:27,389 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:09:27,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:27,390 INFO L85 PathProgramCache]: Analyzing trace with hash 226168954, now seen corresponding path program 3 times [2025-02-06 13:09:27,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:27,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554716363] [2025-02-06 13:09:27,390 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:09:27,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:27,399 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 3 equivalence classes. [2025-02-06 13:09:27,417 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 35 of 35 statements. [2025-02-06 13:09:27,417 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 13:09:27,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:09:27,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:27,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554716363] [2025-02-06 13:09:27,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554716363] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:27,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:27,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:09:27,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474396397] [2025-02-06 13:09:27,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:27,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:09:27,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:27,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:09:27,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:09:27,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-06 13:09:27,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 324 transitions, 2930 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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) [2025-02-06 13:09:27,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:27,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-06 13:09:27,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:28,634 INFO L124 PetriNetUnfolderBase]: 2833/5376 cut-off events. [2025-02-06 13:09:28,635 INFO L125 PetriNetUnfolderBase]: For 47188/47308 co-relation queries the response was YES. [2025-02-06 13:09:28,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30071 conditions, 5376 events. 2833/5376 cut-off events. For 47188/47308 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 33971 event pairs, 657 based on Foata normal form. 145/5247 useless extension candidates. Maximal degree in co-relation 24215. Up to 1970 conditions per place. [2025-02-06 13:09:28,678 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 354 selfloop transitions, 46 changer transitions 17/455 dead transitions. [2025-02-06 13:09:28,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 455 transitions, 4831 flow [2025-02-06 13:09:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:09:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:09:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2025-02-06 13:09:28,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2025-02-06 13:09:28,679 INFO L175 Difference]: Start difference. First operand has 190 places, 324 transitions, 2930 flow. Second operand 4 states and 136 transitions. [2025-02-06 13:09:28,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 455 transitions, 4831 flow [2025-02-06 13:09:28,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 455 transitions, 4696 flow, removed 38 selfloop flow, removed 4 redundant places. [2025-02-06 13:09:28,901 INFO L231 Difference]: Finished difference. Result has 191 places, 332 transitions, 2981 flow [2025-02-06 13:09:28,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2745, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2981, PETRI_PLACES=191, PETRI_TRANSITIONS=332} [2025-02-06 13:09:28,902 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 139 predicate places. [2025-02-06 13:09:28,902 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 332 transitions, 2981 flow [2025-02-06 13:09:28,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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) [2025-02-06 13:09:28,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:28,903 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:28,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-06 13:09:28,903 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:09:28,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1913792144, now seen corresponding path program 4 times [2025-02-06 13:09:28,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:28,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042624794] [2025-02-06 13:09:28,905 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:09:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:28,915 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-02-06 13:09:28,929 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-06 13:09:28,929 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:09:28,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-06 13:09:29,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:29,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042624794] [2025-02-06 13:09:29,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042624794] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:29,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:29,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:09:29,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752142163] [2025-02-06 13:09:29,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:29,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:09:29,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:29,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:09:29,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:09:29,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-06 13:09:29,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 332 transitions, 2981 flow. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:09:29,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:29,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-06 13:09:29,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:30,920 INFO L124 PetriNetUnfolderBase]: 4603/8427 cut-off events. [2025-02-06 13:09:30,920 INFO L125 PetriNetUnfolderBase]: For 69767/69975 co-relation queries the response was YES. [2025-02-06 13:09:30,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47148 conditions, 8427 events. 4603/8427 cut-off events. For 69767/69975 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 56725 event pairs, 572 based on Foata normal form. 72/8063 useless extension candidates. Maximal degree in co-relation 34283. Up to 1597 conditions per place. [2025-02-06 13:09:31,015 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 496 selfloop transitions, 188 changer transitions 4/726 dead transitions. [2025-02-06 13:09:31,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 726 transitions, 7819 flow [2025-02-06 13:09:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:09:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:09:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2025-02-06 13:09:31,016 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5801886792452831 [2025-02-06 13:09:31,017 INFO L175 Difference]: Start difference. First operand has 191 places, 332 transitions, 2981 flow. Second operand 8 states and 246 transitions. [2025-02-06 13:09:31,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 726 transitions, 7819 flow [2025-02-06 13:09:31,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 726 transitions, 7738 flow, removed 32 selfloop flow, removed 3 redundant places. [2025-02-06 13:09:31,379 INFO L231 Difference]: Finished difference. Result has 197 places, 424 transitions, 4532 flow [2025-02-06 13:09:31,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4532, PETRI_PLACES=197, PETRI_TRANSITIONS=424} [2025-02-06 13:09:31,380 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 145 predicate places. [2025-02-06 13:09:31,380 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 424 transitions, 4532 flow [2025-02-06 13:09:31,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:09:31,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:31,381 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:31,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-02-06 13:09:31,381 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:09:31,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:31,382 INFO L85 PathProgramCache]: Analyzing trace with hash -896519320, now seen corresponding path program 5 times [2025-02-06 13:09:31,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:31,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917379412] [2025-02-06 13:09:31,382 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:09:31,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:31,393 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 43 statements into 3 equivalence classes. [2025-02-06 13:09:31,417 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 13:09:31,418 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:09:31,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:09:31,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:31,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917379412] [2025-02-06 13:09:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917379412] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:31,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800374032] [2025-02-06 13:09:31,567 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:09:31,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:31,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:31,569 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:31,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 13:09:31,636 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 43 statements into 3 equivalence classes. [2025-02-06 13:09:31,677 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 13:09:31,678 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 13:09:31,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:31,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:09:31,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:09:31,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:09:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:09:32,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800374032] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:09:32,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:09:32,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-06 13:09:32,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315927770] [2025-02-06 13:09:32,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:09:32,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:09:32,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:32,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:09:32,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:09:32,083 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2025-02-06 13:09:32,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 424 transitions, 4532 flow. Second operand has 12 states, 12 states have (on average 23.666666666666668) internal successors, (284), 12 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:09:32,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:32,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2025-02-06 13:09:32,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:33,120 INFO L124 PetriNetUnfolderBase]: 2661/4953 cut-off events. [2025-02-06 13:09:33,120 INFO L125 PetriNetUnfolderBase]: For 46964/47132 co-relation queries the response was YES. [2025-02-06 13:09:33,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30008 conditions, 4953 events. 2661/4953 cut-off events. For 46964/47132 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 30247 event pairs, 1260 based on Foata normal form. 75/4691 useless extension candidates. Maximal degree in co-relation 29578. Up to 3154 conditions per place. [2025-02-06 13:09:33,168 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 87 selfloop transitions, 11 changer transitions 120/229 dead transitions. [2025-02-06 13:09:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 229 transitions, 2895 flow [2025-02-06 13:09:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:09:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:09:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2025-02-06 13:09:33,169 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.480083857442348 [2025-02-06 13:09:33,169 INFO L175 Difference]: Start difference. First operand has 197 places, 424 transitions, 4532 flow. Second operand 9 states and 229 transitions. [2025-02-06 13:09:33,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 229 transitions, 2895 flow [2025-02-06 13:09:33,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 229 transitions, 2772 flow, removed 61 selfloop flow, removed 12 redundant places. [2025-02-06 13:09:33,366 INFO L231 Difference]: Finished difference. Result has 168 places, 109 transitions, 1132 flow [2025-02-06 13:09:33,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1132, PETRI_PLACES=168, PETRI_TRANSITIONS=109} [2025-02-06 13:09:33,367 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 116 predicate places. [2025-02-06 13:09:33,367 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 109 transitions, 1132 flow [2025-02-06 13:09:33,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.666666666666668) internal successors, (284), 12 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:09:33,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:33,368 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:33,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 13:09:33,568 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,SelfDestructingSolverStorable22 [2025-02-06 13:09:33,568 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-02-06 13:09:33,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -41352843, now seen corresponding path program 6 times [2025-02-06 13:09:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:33,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075189881] [2025-02-06 13:09:33,569 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:09:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:33,581 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 4 equivalence classes. [2025-02-06 13:09:33,624 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 41 of 45 statements. [2025-02-06 13:09:33,624 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:09:33,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:09:36,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:36,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075189881] [2025-02-06 13:09:36,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075189881] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:36,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702858226] [2025-02-06 13:09:36,663 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 13:09:36,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:36,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:36,665 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:36,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 13:09:36,716 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 4 equivalence classes. [2025-02-06 13:09:36,748 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 41 of 45 statements. [2025-02-06 13:09:36,749 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 13:09:36,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:36,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-06 13:09:36,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:38,311 INFO L349 Elim1Store]: treesize reduction 32, result has 50.8 percent of original size [2025-02-06 13:09:38,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 48 [2025-02-06 13:09:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-06 13:09:38,419 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:09:41,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:09:41,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 199 treesize of output 1015