./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-vector-add.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-vector-add.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 63e73d2abe89b782ca9e5c579baa72b5461ffc3c60c322f6f03d18cdd5548702 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:10:05,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:10:05,632 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:10:05,636 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:10:05,636 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:10:05,663 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:10:05,664 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:10:05,664 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:10:05,664 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:10:05,664 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:10:05,665 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:10:05,665 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:10:05,666 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:10:05,666 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:10:05,666 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:10:05,666 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:10:05,666 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:10:05,667 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:10:05,667 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:10:05,667 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:10:05,667 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:10:05,667 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:10:05,667 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:10:05,667 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:10:05,667 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:10:05,668 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:10:05,668 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:10:05,668 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:10:05,668 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:10:05,668 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:10:05,668 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:10:05,668 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:10:05,668 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:10:05,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:10:05,669 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:10:05,669 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:10:05,669 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:10:05,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:10:05,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:10:05,669 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:10:05,669 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:10:05,669 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:10:05,669 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 -> 63e73d2abe89b782ca9e5c579baa72b5461ffc3c60c322f6f03d18cdd5548702 [2025-02-06 13:10:05,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:10:05,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:10:05,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:10:05,919 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:10:05,920 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:10:05,920 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2025-02-06 13:10:07,220 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/da193c5d5/6d5792c97dd8449b8eab6747c06573c0/FLAGa16d18828 [2025-02-06 13:10:07,503 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:10:07,505 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2025-02-06 13:10:07,517 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/da193c5d5/6d5792c97dd8449b8eab6747c06573c0/FLAGa16d18828 [2025-02-06 13:10:07,537 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/da193c5d5/6d5792c97dd8449b8eab6747c06573c0 [2025-02-06 13:10:07,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:10:07,541 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:10:07,543 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:10:07,543 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:10:07,547 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:10:07,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,549 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@365ee1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07, skipping insertion in model container [2025-02-06 13:10:07,549 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,568 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:10:07,728 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 13:10:07,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:10:07,741 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:10:07,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:10:07,785 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:10:07,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07 WrapperNode [2025-02-06 13:10:07,786 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:10:07,787 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:10:07,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:10:07,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:10:07,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,803 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,821 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 12, calls inlined = 18, statements flattened = 175 [2025-02-06 13:10:07,822 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:10:07,822 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:10:07,822 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:10:07,823 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:10:07,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,833 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,846 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 7 writes are split as follows [0, 7]. [2025-02-06 13:10:07,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,847 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,860 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,869 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:10:07,870 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:10:07,870 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:10:07,871 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:10:07,871 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (1/1) ... [2025-02-06 13:10:07,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:10:07,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:07,904 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 13:10:07,907 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 13:10:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:10:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:10:07,929 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:10:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:10:07,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:10:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:10:07,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:10:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:10:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:10:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:10:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:10:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:10:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:10:07,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:10:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:10:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:10:07,932 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 13:10:08,027 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:10:08,028 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:10:08,541 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:10:08,541 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:10:08,822 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:10:08,823 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:10:08,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:10:08 BoogieIcfgContainer [2025-02-06 13:10:08,823 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:10:08,826 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:10:08,826 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:10:08,830 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:10:08,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:10:07" (1/3) ... [2025-02-06 13:10:08,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dce1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:10:08, skipping insertion in model container [2025-02-06 13:10:08,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:10:07" (2/3) ... [2025-02-06 13:10:08,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dce1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:10:08, skipping insertion in model container [2025-02-06 13:10:08,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:10:08" (3/3) ... [2025-02-06 13:10:08,833 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-vector-add.wvr.c [2025-02-06 13:10:08,846 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:10:08,847 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-vector-add.wvr.c that has 4 procedures, 74 locations, 1 initial locations, 7 loop locations, and 32 error locations. [2025-02-06 13:10:08,847 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:10:08,911 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 13:10:08,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 80 transitions, 181 flow [2025-02-06 13:10:08,983 INFO L124 PetriNetUnfolderBase]: 7/77 cut-off events. [2025-02-06 13:10:08,985 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:10:08,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 77 events. 7/77 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 206 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2025-02-06 13:10:08,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 80 transitions, 181 flow [2025-02-06 13:10:08,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 170 flow [2025-02-06 13:10:09,008 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:10:09,024 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;@7a4eb0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:10:09,024 INFO L334 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2025-02-06 13:10:09,028 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:10:09,028 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:10:09,028 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:10:09,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:09,029 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:10:09,029 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:09,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash 662393, now seen corresponding path program 1 times [2025-02-06 13:10:09,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:09,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827799913] [2025-02-06 13:10:09,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:09,110 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:10:09,154 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:10:09,155 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:09,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:09,279 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 13:10:09,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:09,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827799913] [2025-02-06 13:10:09,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827799913] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:09,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:09,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:10:09,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803728662] [2025-02-06 13:10:09,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:09,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:10:09,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:09,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:10:09,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:10:09,388 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2025-02-06 13:10:09,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 13:10:09,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:09,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2025-02-06 13:10:09,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:09,587 INFO L124 PetriNetUnfolderBase]: 203/522 cut-off events. [2025-02-06 13:10:09,587 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-02-06 13:10:09,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 522 events. 203/522 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2857 event pairs, 124 based on Foata normal form. 1/379 useless extension candidates. Maximal degree in co-relation 741. Up to 294 conditions per place. [2025-02-06 13:10:09,597 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 31 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2025-02-06 13:10:09,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 224 flow [2025-02-06 13:10:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:10:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:10:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2025-02-06 13:10:09,613 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2025-02-06 13:10:09,614 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 170 flow. Second operand 3 states and 161 transitions. [2025-02-06 13:10:09,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 224 flow [2025-02-06 13:10:09,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 212 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:10:09,624 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 150 flow [2025-02-06 13:10:09,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2025-02-06 13:10:09,631 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, -10 predicate places. [2025-02-06 13:10:09,631 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 150 flow [2025-02-06 13:10:09,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 13:10:09,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:09,632 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:10:09,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:10:09,632 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:09,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:09,633 INFO L85 PathProgramCache]: Analyzing trace with hash 662394, now seen corresponding path program 1 times [2025-02-06 13:10:09,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:09,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589964211] [2025-02-06 13:10:09,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:09,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:09,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:10:09,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:10:09,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:09,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:09,947 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 13:10:09,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:09,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589964211] [2025-02-06 13:10:09,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589964211] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:09,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:09,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:10:09,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83564449] [2025-02-06 13:10:09,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:09,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:10:09,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:09,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:10:09,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:10:10,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2025-02-06 13:10:10,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 13:10:10,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:10,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2025-02-06 13:10:10,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:10,248 INFO L124 PetriNetUnfolderBase]: 204/525 cut-off events. [2025-02-06 13:10:10,249 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-06 13:10:10,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 525 events. 204/525 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2856 event pairs, 124 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 810. Up to 311 conditions per place. [2025-02-06 13:10:10,257 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 36 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2025-02-06 13:10:10,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 236 flow [2025-02-06 13:10:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:10:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:10:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 205 transitions. [2025-02-06 13:10:10,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.640625 [2025-02-06 13:10:10,259 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 150 flow. Second operand 4 states and 205 transitions. [2025-02-06 13:10:10,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 236 flow [2025-02-06 13:10:10,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:10:10,294 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 173 flow [2025-02-06 13:10:10,295 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2025-02-06 13:10:10,295 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, -7 predicate places. [2025-02-06 13:10:10,295 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 173 flow [2025-02-06 13:10:10,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 13:10:10,296 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:10,296 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:10:10,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:10:10,296 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:10,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:10,296 INFO L85 PathProgramCache]: Analyzing trace with hash 20536346, now seen corresponding path program 1 times [2025-02-06 13:10:10,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:10,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889499946] [2025-02-06 13:10:10,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:10,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:10,307 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:10:10,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:10:10,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:10,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:10,424 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 13:10:10,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:10,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889499946] [2025-02-06 13:10:10,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889499946] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:10,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:10,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:10:10,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649144050] [2025-02-06 13:10:10,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:10,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:10:10,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:10,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:10:10,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:10:10,442 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2025-02-06 13:10:10,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:10:10,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:10,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2025-02-06 13:10:10,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:10,615 INFO L124 PetriNetUnfolderBase]: 207/540 cut-off events. [2025-02-06 13:10:10,615 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-06 13:10:10,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 540 events. 207/540 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2968 event pairs, 124 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 823. Up to 308 conditions per place. [2025-02-06 13:10:10,620 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 35 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2025-02-06 13:10:10,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 293 flow [2025-02-06 13:10:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:10:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:10:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2025-02-06 13:10:10,623 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.721875 [2025-02-06 13:10:10,623 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 173 flow. Second operand 4 states and 231 transitions. [2025-02-06 13:10:10,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 293 flow [2025-02-06 13:10:10,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:10:10,625 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 248 flow [2025-02-06 13:10:10,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2025-02-06 13:10:10,628 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2025-02-06 13:10:10,628 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 248 flow [2025-02-06 13:10:10,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:10:10,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:10,629 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:10:10,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:10:10,629 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:10,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:10,630 INFO L85 PathProgramCache]: Analyzing trace with hash 636582041, now seen corresponding path program 1 times [2025-02-06 13:10:10,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:10,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138015673] [2025-02-06 13:10:10,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:10,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:10,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:10:10,649 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:10:10,649 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:10,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:10,895 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 13:10:10,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:10,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138015673] [2025-02-06 13:10:10,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138015673] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:10,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077251929] [2025-02-06 13:10:10,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:10,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:10,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:10,901 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 13:10:10,903 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 13:10:10,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:10:10,965 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:10:10,965 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:10,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:10,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:10:10,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:11,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:10:11,270 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 13:10:11,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:11,410 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 13:10:11,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077251929] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:11,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:11,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:10:11,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927067683] [2025-02-06 13:10:11,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:11,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:10:11,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:11,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:10:11,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:10:12,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2025-02-06 13:10:12,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 42.36363636363637) internal successors, (466), 11 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 13:10:12,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:12,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2025-02-06 13:10:12,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:12,362 INFO L124 PetriNetUnfolderBase]: 207/539 cut-off events. [2025-02-06 13:10:12,362 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-06 13:10:12,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 539 events. 207/539 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2956 event pairs, 124 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 829. Up to 322 conditions per place. [2025-02-06 13:10:12,370 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 41 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2025-02-06 13:10:12,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 340 flow [2025-02-06 13:10:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:10:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:10:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 286 transitions. [2025-02-06 13:10:12,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2025-02-06 13:10:12,374 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 248 flow. Second operand 6 states and 286 transitions. [2025-02-06 13:10:12,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 340 flow [2025-02-06 13:10:12,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 340 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 13:10:12,376 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 258 flow [2025-02-06 13:10:12,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2025-02-06 13:10:12,377 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1 predicate places. [2025-02-06 13:10:12,377 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 258 flow [2025-02-06 13:10:12,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 42.36363636363637) internal successors, (466), 11 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 13:10:12,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:12,380 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 13:10:12,392 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 13:10:12,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:12,580 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:12,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1740791077, now seen corresponding path program 1 times [2025-02-06 13:10:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:12,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458202173] [2025-02-06 13:10:12,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:12,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:12,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:10:12,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:10:12,605 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:12,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:12,813 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 13:10:12,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:12,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458202173] [2025-02-06 13:10:12,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458202173] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:12,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859628190] [2025-02-06 13:10:12,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:12,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:12,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:12,817 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 13:10:12,819 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 13:10:12,863 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:10:12,876 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:10:12,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:12,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:12,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 13:10:12,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:12,895 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 13:10:12,998 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 13:10:12,998 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 32 treesize of output 27 [2025-02-06 13:10:13,022 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 13:10:13,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:10:13,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859628190] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:13,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:10:13,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2025-02-06 13:10:13,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435620693] [2025-02-06 13:10:13,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:13,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:10:13,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:13,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:10:13,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:10:13,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2025-02-06 13:10:13,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 13:10:13,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:13,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2025-02-06 13:10:13,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:13,494 INFO L124 PetriNetUnfolderBase]: 405/1043 cut-off events. [2025-02-06 13:10:13,494 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-06 13:10:13,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 1043 events. 405/1043 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6749 event pairs, 248 based on Foata normal form. 3/775 useless extension candidates. Maximal degree in co-relation 892. Up to 310 conditions per place. [2025-02-06 13:10:13,502 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 62 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2025-02-06 13:10:13,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 106 transitions, 471 flow [2025-02-06 13:10:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:10:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:10:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2025-02-06 13:10:13,503 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6975 [2025-02-06 13:10:13,504 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 258 flow. Second operand 5 states and 279 transitions. [2025-02-06 13:10:13,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 106 transitions, 471 flow [2025-02-06 13:10:13,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 106 transitions, 441 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-06 13:10:13,509 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 269 flow [2025-02-06 13:10:13,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2025-02-06 13:10:13,510 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, -1 predicate places. [2025-02-06 13:10:13,511 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 269 flow [2025-02-06 13:10:13,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 13:10:13,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:13,512 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:13,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:13,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:13,716 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:13,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:13,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2137040400, now seen corresponding path program 1 times [2025-02-06 13:10:13,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:13,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052815813] [2025-02-06 13:10:13,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:13,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:13,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:10:13,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:10:13,729 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:13,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:10:13,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:13,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052815813] [2025-02-06 13:10:13,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052815813] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:13,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116469609] [2025-02-06 13:10:13,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:13,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:13,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:13,833 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 13:10:13,836 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 13:10:13,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 13:10:13,891 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 13:10:13,891 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:13,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:13,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:10:13,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:10:13,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:10:14,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116469609] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:14,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:14,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-06 13:10:14,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853895982] [2025-02-06 13:10:14,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:14,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:10:14,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:14,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:10:14,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:10:14,118 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2025-02-06 13:10:14,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 269 flow. Second operand has 13 states, 13 states have (on average 46.53846153846154) internal successors, (605), 13 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 13:10:14,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:14,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2025-02-06 13:10:14,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:14,502 INFO L124 PetriNetUnfolderBase]: 610/1575 cut-off events. [2025-02-06 13:10:14,503 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2025-02-06 13:10:14,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2651 conditions, 1575 events. 610/1575 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9779 event pairs, 372 based on Foata normal form. 3/1167 useless extension candidates. Maximal degree in co-relation 844. Up to 590 conditions per place. [2025-02-06 13:10:14,513 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 54 selfloop transitions, 39 changer transitions 0/129 dead transitions. [2025-02-06 13:10:14,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 129 transitions, 645 flow [2025-02-06 13:10:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:10:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:10:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 500 transitions. [2025-02-06 13:10:14,515 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2025-02-06 13:10:14,515 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 269 flow. Second operand 9 states and 500 transitions. [2025-02-06 13:10:14,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 129 transitions, 645 flow [2025-02-06 13:10:14,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 643 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:10:14,518 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 503 flow [2025-02-06 13:10:14,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=503, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2025-02-06 13:10:14,519 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 8 predicate places. [2025-02-06 13:10:14,519 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 503 flow [2025-02-06 13:10:14,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 46.53846153846154) internal successors, (605), 13 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 13:10:14,520 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:14,520 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:14,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:14,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:14,724 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:14,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:14,725 INFO L85 PathProgramCache]: Analyzing trace with hash 575150342, now seen corresponding path program 1 times [2025-02-06 13:10:14,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:14,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001060686] [2025-02-06 13:10:14,725 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:14,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:14,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:10:14,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:10:14,738 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:14,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:14,809 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 13:10:14,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:14,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001060686] [2025-02-06 13:10:14,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001060686] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:14,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:14,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:10:14,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113349551] [2025-02-06 13:10:14,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:14,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:10:14,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:14,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:10:14,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:10:14,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2025-02-06 13:10:14,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 503 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 13:10:14,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:14,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2025-02-06 13:10:14,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:15,145 INFO L124 PetriNetUnfolderBase]: 874/2158 cut-off events. [2025-02-06 13:10:15,145 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2025-02-06 13:10:15,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3731 conditions, 2158 events. 874/2158 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 13787 event pairs, 496 based on Foata normal form. 2/1590 useless extension candidates. Maximal degree in co-relation 1408. Up to 781 conditions per place. [2025-02-06 13:10:15,160 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 71 selfloop transitions, 27 changer transitions 1/134 dead transitions. [2025-02-06 13:10:15,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 789 flow [2025-02-06 13:10:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:10:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:10:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 343 transitions. [2025-02-06 13:10:15,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7145833333333333 [2025-02-06 13:10:15,163 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 503 flow. Second operand 6 states and 343 transitions. [2025-02-06 13:10:15,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 789 flow [2025-02-06 13:10:15,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 134 transitions, 692 flow, removed 12 selfloop flow, removed 4 redundant places. [2025-02-06 13:10:15,170 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 480 flow [2025-02-06 13:10:15,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=480, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2025-02-06 13:10:15,171 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 11 predicate places. [2025-02-06 13:10:15,172 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 480 flow [2025-02-06 13:10:15,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 13:10:15,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:15,173 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2025-02-06 13:10:15,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:10:15,173 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:15,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash -646863791, now seen corresponding path program 2 times [2025-02-06 13:10:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:15,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079224184] [2025-02-06 13:10:15,174 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:10:15,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:15,181 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-06 13:10:15,203 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:10:15,206 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:10:15,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:10:15,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079224184] [2025-02-06 13:10:15,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079224184] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349555580] [2025-02-06 13:10:15,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:10:15,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:15,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:15,394 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 13:10:15,396 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 13:10:15,441 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-06 13:10:15,456 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:10:15,456 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:10:15,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:15,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 13:10:15,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:15,472 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 13:10:15,588 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 13:10:15,589 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 32 treesize of output 27 [2025-02-06 13:10:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:10:15,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:10:15,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349555580] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:15,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:15,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2025-02-06 13:10:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129266149] [2025-02-06 13:10:15,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:15,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 13:10:15,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:15,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 13:10:15,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:10:16,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2025-02-06 13:10:16,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 480 flow. Second operand has 16 states, 16 states have (on average 42.75) internal successors, (684), 16 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 13:10:16,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:16,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2025-02-06 13:10:16,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:17,876 INFO L124 PetriNetUnfolderBase]: 1128/3208 cut-off events. [2025-02-06 13:10:17,876 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2025-02-06 13:10:17,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5745 conditions, 3208 events. 1128/3208 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 25819 event pairs, 744 based on Foata normal form. 6/2297 useless extension candidates. Maximal degree in co-relation 2582. Up to 854 conditions per place. [2025-02-06 13:10:17,896 INFO L140 encePairwiseOnDemand]: 64/80 looper letters, 59 selfloop transitions, 46 changer transitions 0/138 dead transitions. [2025-02-06 13:10:17,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 138 transitions, 857 flow [2025-02-06 13:10:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:10:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:10:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 546 transitions. [2025-02-06 13:10:17,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6204545454545455 [2025-02-06 13:10:17,899 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 480 flow. Second operand 11 states and 546 transitions. [2025-02-06 13:10:17,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 138 transitions, 857 flow [2025-02-06 13:10:17,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 779 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:10:17,908 INFO L231 Difference]: Finished difference. Result has 94 places, 111 transitions, 581 flow [2025-02-06 13:10:17,908 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=581, PETRI_PLACES=94, PETRI_TRANSITIONS=111} [2025-02-06 13:10:17,911 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 15 predicate places. [2025-02-06 13:10:17,911 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 111 transitions, 581 flow [2025-02-06 13:10:17,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 42.75) internal successors, (684), 16 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 13:10:17,911 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:17,912 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:17,919 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 13:10:18,112 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,SelfDestructingSolverStorable7 [2025-02-06 13:10:18,112 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:18,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:18,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1390230036, now seen corresponding path program 1 times [2025-02-06 13:10:18,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:18,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484406604] [2025-02-06 13:10:18,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:18,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:18,120 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:10:18,127 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:10:18,129 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:18,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:18,217 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 13:10:18,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:18,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484406604] [2025-02-06 13:10:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484406604] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:18,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:18,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:10:18,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748125473] [2025-02-06 13:10:18,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:18,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:10:18,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:18,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:10:18,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:10:18,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2025-02-06 13:10:18,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 111 transitions, 581 flow. Second operand has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 6 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 13:10:18,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:18,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2025-02-06 13:10:18,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:18,626 INFO L124 PetriNetUnfolderBase]: 1236/3082 cut-off events. [2025-02-06 13:10:18,626 INFO L125 PetriNetUnfolderBase]: For 759/855 co-relation queries the response was YES. [2025-02-06 13:10:18,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5813 conditions, 3082 events. 1236/3082 cut-off events. For 759/855 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 22201 event pairs, 744 based on Foata normal form. 0/2280 useless extension candidates. Maximal degree in co-relation 2564. Up to 1176 conditions per place. [2025-02-06 13:10:18,646 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 70 selfloop transitions, 32 changer transitions 3/137 dead transitions. [2025-02-06 13:10:18,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 137 transitions, 883 flow [2025-02-06 13:10:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:10:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:10:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2025-02-06 13:10:18,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.70625 [2025-02-06 13:10:18,648 INFO L175 Difference]: Start difference. First operand has 94 places, 111 transitions, 581 flow. Second operand 6 states and 339 transitions. [2025-02-06 13:10:18,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 137 transitions, 883 flow [2025-02-06 13:10:18,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 137 transitions, 819 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-02-06 13:10:18,656 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 601 flow [2025-02-06 13:10:18,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=601, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2025-02-06 13:10:18,657 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 18 predicate places. [2025-02-06 13:10:18,657 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 601 flow [2025-02-06 13:10:18,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 6 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 13:10:18,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:18,657 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:18,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:10:18,657 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:18,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -302154241, now seen corresponding path program 1 times [2025-02-06 13:10:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:18,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089533464] [2025-02-06 13:10:18,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:18,665 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:10:18,671 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:10:18,671 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:18,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:18,770 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 13:10:18,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:18,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089533464] [2025-02-06 13:10:18,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089533464] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:18,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:18,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:10:18,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14333430] [2025-02-06 13:10:18,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:18,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:10:18,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:18,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:10:18,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:10:18,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2025-02-06 13:10:18,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 601 flow. Second operand has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 13:10:18,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:18,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2025-02-06 13:10:18,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:19,128 INFO L124 PetriNetUnfolderBase]: 1014/2177 cut-off events. [2025-02-06 13:10:19,129 INFO L125 PetriNetUnfolderBase]: For 1113/1284 co-relation queries the response was YES. [2025-02-06 13:10:19,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4871 conditions, 2177 events. 1014/2177 cut-off events. For 1113/1284 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12887 event pairs, 659 based on Foata normal form. 0/1693 useless extension candidates. Maximal degree in co-relation 2501. Up to 1128 conditions per place. [2025-02-06 13:10:19,140 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 48 selfloop transitions, 19 changer transitions 35/134 dead transitions. [2025-02-06 13:10:19,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 895 flow [2025-02-06 13:10:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:10:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:10:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 336 transitions. [2025-02-06 13:10:19,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2025-02-06 13:10:19,142 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 601 flow. Second operand 6 states and 336 transitions. [2025-02-06 13:10:19,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 895 flow [2025-02-06 13:10:19,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 134 transitions, 841 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:10:19,151 INFO L231 Difference]: Finished difference. Result has 101 places, 96 transitions, 462 flow [2025-02-06 13:10:19,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=462, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2025-02-06 13:10:19,152 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 22 predicate places. [2025-02-06 13:10:19,153 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 462 flow [2025-02-06 13:10:19,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 13:10:19,153 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:19,153 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:19,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:10:19,154 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:19,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1487962978, now seen corresponding path program 1 times [2025-02-06 13:10:19,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:19,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849773862] [2025-02-06 13:10:19,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:19,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:19,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:10:19,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:10:19,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:19,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:10:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849773862] [2025-02-06 13:10:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849773862] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:19,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:19,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:10:19,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057297394] [2025-02-06 13:10:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:19,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:10:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:19,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:10:19,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:10:19,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2025-02-06 13:10:19,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 462 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:10:19,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:19,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2025-02-06 13:10:19,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:19,729 INFO L124 PetriNetUnfolderBase]: 1293/2724 cut-off events. [2025-02-06 13:10:19,730 INFO L125 PetriNetUnfolderBase]: For 691/931 co-relation queries the response was YES. [2025-02-06 13:10:19,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5705 conditions, 2724 events. 1293/2724 cut-off events. For 691/931 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18710 event pairs, 918 based on Foata normal form. 0/2330 useless extension candidates. Maximal degree in co-relation 2837. Up to 1864 conditions per place. [2025-02-06 13:10:19,746 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 59 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2025-02-06 13:10:19,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 93 transitions, 588 flow [2025-02-06 13:10:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:10:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:10:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2025-02-06 13:10:19,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.535 [2025-02-06 13:10:19,748 INFO L175 Difference]: Start difference. First operand has 101 places, 96 transitions, 462 flow. Second operand 5 states and 214 transitions. [2025-02-06 13:10:19,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 93 transitions, 588 flow [2025-02-06 13:10:19,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 93 transitions, 499 flow, removed 16 selfloop flow, removed 11 redundant places. [2025-02-06 13:10:19,758 INFO L231 Difference]: Finished difference. Result has 83 places, 93 transitions, 381 flow [2025-02-06 13:10:19,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=83, PETRI_TRANSITIONS=93} [2025-02-06 13:10:19,758 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 4 predicate places. [2025-02-06 13:10:19,759 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 93 transitions, 381 flow [2025-02-06 13:10:19,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:10:19,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:19,759 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:19,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 13:10:19,759 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:19,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1487962977, now seen corresponding path program 1 times [2025-02-06 13:10:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:19,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782300970] [2025-02-06 13:10:19,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:19,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:19,768 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:10:19,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:10:19,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:19,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:10:20,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:20,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782300970] [2025-02-06 13:10:20,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782300970] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:20,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114343723] [2025-02-06 13:10:20,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:20,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:20,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:20,131 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 13:10:20,134 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 13:10:20,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 13:10:20,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 13:10:20,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:20,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:20,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-06 13:10:20,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:20,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:10:20,268 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-06 13:10:20,268 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 20 treesize of output 22 [2025-02-06 13:10:20,386 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2025-02-06 13:10:20,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2025-02-06 13:10:20,476 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2025-02-06 13:10:20,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2025-02-06 13:10:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:10:20,665 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:10:20,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114343723] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:20,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:10:20,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 15 [2025-02-06 13:10:20,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917657517] [2025-02-06 13:10:20,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:20,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:10:20,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:20,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:10:20,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:10:21,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2025-02-06 13:10:21,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 93 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 13:10:21,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:21,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2025-02-06 13:10:21,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:21,725 INFO L124 PetriNetUnfolderBase]: 1212/2931 cut-off events. [2025-02-06 13:10:21,726 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2025-02-06 13:10:21,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4888 conditions, 2931 events. 1212/2931 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22192 event pairs, 507 based on Foata normal form. 0/2182 useless extension candidates. Maximal degree in co-relation 1615. Up to 1135 conditions per place. [2025-02-06 13:10:21,742 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 66 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2025-02-06 13:10:21,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 575 flow [2025-02-06 13:10:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:10:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:10:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2025-02-06 13:10:21,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2025-02-06 13:10:21,745 INFO L175 Difference]: Start difference. First operand has 83 places, 93 transitions, 381 flow. Second operand 7 states and 352 transitions. [2025-02-06 13:10:21,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 575 flow [2025-02-06 13:10:21,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 107 transitions, 565 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:10:21,748 INFO L231 Difference]: Finished difference. Result has 88 places, 95 transitions, 419 flow [2025-02-06 13:10:21,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=419, PETRI_PLACES=88, PETRI_TRANSITIONS=95} [2025-02-06 13:10:21,749 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 9 predicate places. [2025-02-06 13:10:21,750 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 95 transitions, 419 flow [2025-02-06 13:10:21,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 13:10:21,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:21,750 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:21,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:10:21,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-06 13:10:21,954 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:21,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:21,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1117788563, now seen corresponding path program 1 times [2025-02-06 13:10:21,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:21,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751672385] [2025-02-06 13:10:21,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:21,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:21,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:10:21,980 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:10:21,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:21,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:10:22,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751672385] [2025-02-06 13:10:22,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751672385] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:22,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:22,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:10:22,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886346524] [2025-02-06 13:10:22,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:22,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:10:22,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:22,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:10:22,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:10:22,238 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2025-02-06 13:10:22,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 419 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:10:22,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:22,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2025-02-06 13:10:22,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:22,571 INFO L124 PetriNetUnfolderBase]: 1713/3546 cut-off events. [2025-02-06 13:10:22,571 INFO L125 PetriNetUnfolderBase]: For 1297/1408 co-relation queries the response was YES. [2025-02-06 13:10:22,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7389 conditions, 3546 events. 1713/3546 cut-off events. For 1297/1408 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 25580 event pairs, 1158 based on Foata normal form. 0/3214 useless extension candidates. Maximal degree in co-relation 2448. Up to 2404 conditions per place. [2025-02-06 13:10:22,587 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 59 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2025-02-06 13:10:22,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 92 transitions, 547 flow [2025-02-06 13:10:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:10:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:10:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2025-02-06 13:10:22,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.535 [2025-02-06 13:10:22,589 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 419 flow. Second operand 5 states and 214 transitions. [2025-02-06 13:10:22,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 92 transitions, 547 flow [2025-02-06 13:10:22,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 537 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:10:22,592 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 419 flow [2025-02-06 13:10:22,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=419, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2025-02-06 13:10:22,594 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 7 predicate places. [2025-02-06 13:10:22,594 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 419 flow [2025-02-06 13:10:22,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:10:22,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:22,594 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:22,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-06 13:10:22,595 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:22,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:22,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1117788564, now seen corresponding path program 1 times [2025-02-06 13:10:22,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:22,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492867373] [2025-02-06 13:10:22,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:22,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:22,604 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:10:22,614 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:10:22,614 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:22,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:10:22,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:22,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492867373] [2025-02-06 13:10:22,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492867373] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:22,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022148841] [2025-02-06 13:10:22,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:22,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:22,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:22,936 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 13:10:22,938 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 13:10:22,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 13:10:23,024 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 13:10:23,024 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:23,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:23,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-06 13:10:23,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:23,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:10:23,098 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-06 13:10:23,098 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 25 treesize of output 25 [2025-02-06 13:10:23,185 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2025-02-06 13:10:23,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2025-02-06 13:10:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:23,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:23,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022148841] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:23,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:10:23,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 16 [2025-02-06 13:10:23,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826724941] [2025-02-06 13:10:23,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:23,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:10:23,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:23,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:10:23,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:10:24,026 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2025-02-06 13:10:24,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 13:10:24,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:24,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2025-02-06 13:10:24,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:24,541 INFO L124 PetriNetUnfolderBase]: 1212/2703 cut-off events. [2025-02-06 13:10:24,541 INFO L125 PetriNetUnfolderBase]: For 439/565 co-relation queries the response was YES. [2025-02-06 13:10:24,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5315 conditions, 2703 events. 1212/2703 cut-off events. For 439/565 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18836 event pairs, 507 based on Foata normal form. 63/2272 useless extension candidates. Maximal degree in co-relation 1756. Up to 1135 conditions per place. [2025-02-06 13:10:24,555 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 65 selfloop transitions, 13 changer transitions 0/104 dead transitions. [2025-02-06 13:10:24,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 104 transitions, 601 flow [2025-02-06 13:10:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:10:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:10:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2025-02-06 13:10:24,557 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2025-02-06 13:10:24,557 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 419 flow. Second operand 7 states and 352 transitions. [2025-02-06 13:10:24,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 104 transitions, 601 flow [2025-02-06 13:10:24,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 104 transitions, 589 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:10:24,560 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 451 flow [2025-02-06 13:10:24,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2025-02-06 13:10:24,562 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2025-02-06 13:10:24,562 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 451 flow [2025-02-06 13:10:24,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 13:10:24,562 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:24,562 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 13:10:24,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 13:10:24,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-02-06 13:10:24,763 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:24,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:24,763 INFO L85 PathProgramCache]: Analyzing trace with hash 232760197, now seen corresponding path program 1 times [2025-02-06 13:10:24,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:24,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368945631] [2025-02-06 13:10:24,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:24,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:24,770 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:10:24,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:10:24,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:24,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:10:25,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:25,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368945631] [2025-02-06 13:10:25,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368945631] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:25,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79633825] [2025-02-06 13:10:25,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:25,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:25,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:25,063 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 13:10:25,065 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 13:10:25,122 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:10:25,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:10:25,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:25,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:25,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-06 13:10:25,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:25,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:10:25,201 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-06 13:10:25,201 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 20 treesize of output 22 [2025-02-06 13:10:25,317 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2025-02-06 13:10:25,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2025-02-06 13:10:25,401 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2025-02-06 13:10:25,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2025-02-06 13:10:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:10:25,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:10:25,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79633825] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:25,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:10:25,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 15 [2025-02-06 13:10:25,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334098347] [2025-02-06 13:10:25,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:25,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:10:25,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:25,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:10:25,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:10:26,130 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2025-02-06 13:10:26,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 451 flow. Second operand has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 13:10:26,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:26,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2025-02-06 13:10:26,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:26,557 INFO L124 PetriNetUnfolderBase]: 1629/3624 cut-off events. [2025-02-06 13:10:26,557 INFO L125 PetriNetUnfolderBase]: For 5476/6124 co-relation queries the response was YES. [2025-02-06 13:10:26,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8181 conditions, 3624 events. 1629/3624 cut-off events. For 5476/6124 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 27899 event pairs, 702 based on Foata normal form. 0/2935 useless extension candidates. Maximal degree in co-relation 2711. Up to 1486 conditions per place. [2025-02-06 13:10:26,580 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 67 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2025-02-06 13:10:26,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 107 transitions, 673 flow [2025-02-06 13:10:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:10:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:10:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 351 transitions. [2025-02-06 13:10:26,582 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6267857142857143 [2025-02-06 13:10:26,582 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 451 flow. Second operand 7 states and 351 transitions. [2025-02-06 13:10:26,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 107 transitions, 673 flow [2025-02-06 13:10:26,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 107 transitions, 652 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:10:26,587 INFO L231 Difference]: Finished difference. Result has 94 places, 95 transitions, 481 flow [2025-02-06 13:10:26,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=481, PETRI_PLACES=94, PETRI_TRANSITIONS=95} [2025-02-06 13:10:26,588 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 15 predicate places. [2025-02-06 13:10:26,588 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 95 transitions, 481 flow [2025-02-06 13:10:26,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 13:10:26,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:26,588 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 13:10:26,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:26,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:26,789 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:26,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:26,790 INFO L85 PathProgramCache]: Analyzing trace with hash 291707712, now seen corresponding path program 1 times [2025-02-06 13:10:26,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:26,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263424325] [2025-02-06 13:10:26,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:26,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:26,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:10:26,808 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:10:26,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:26,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:10:26,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:26,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263424325] [2025-02-06 13:10:26,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263424325] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:26,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:26,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:10:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624164610] [2025-02-06 13:10:26,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:26,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:10:26,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:26,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:10:26,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:10:26,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 80 [2025-02-06 13:10:26,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 95 transitions, 481 flow. Second operand has 5 states, 5 states have (on average 41.2) internal successors, (206), 5 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 13:10:26,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:26,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 80 [2025-02-06 13:10:26,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:27,170 INFO L124 PetriNetUnfolderBase]: 1044/2379 cut-off events. [2025-02-06 13:10:27,170 INFO L125 PetriNetUnfolderBase]: For 4062/4653 co-relation queries the response was YES. [2025-02-06 13:10:27,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6165 conditions, 2379 events. 1044/2379 cut-off events. For 4062/4653 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17192 event pairs, 702 based on Foata normal form. 84/2065 useless extension candidates. Maximal degree in co-relation 2038. Up to 1489 conditions per place. [2025-02-06 13:10:27,181 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 57 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2025-02-06 13:10:27,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 609 flow [2025-02-06 13:10:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:10:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:10:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2025-02-06 13:10:27,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.565 [2025-02-06 13:10:27,183 INFO L175 Difference]: Start difference. First operand has 94 places, 95 transitions, 481 flow. Second operand 5 states and 226 transitions. [2025-02-06 13:10:27,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 609 flow [2025-02-06 13:10:27,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 93 transitions, 595 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:10:27,189 INFO L231 Difference]: Finished difference. Result has 92 places, 93 transitions, 481 flow [2025-02-06 13:10:27,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=481, PETRI_PLACES=92, PETRI_TRANSITIONS=93} [2025-02-06 13:10:27,190 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2025-02-06 13:10:27,191 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 93 transitions, 481 flow [2025-02-06 13:10:27,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 5 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 13:10:27,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:27,191 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 13:10:27,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-06 13:10:27,191 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:27,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:27,192 INFO L85 PathProgramCache]: Analyzing trace with hash 291707713, now seen corresponding path program 1 times [2025-02-06 13:10:27,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:27,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846510967] [2025-02-06 13:10:27,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:27,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:27,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:10:27,208 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:10:27,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:27,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:27,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:27,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846510967] [2025-02-06 13:10:27,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846510967] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:27,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795298753] [2025-02-06 13:10:27,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:27,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:27,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:27,395 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 13:10:27,396 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 13:10:27,453 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:10:27,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:10:27,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:27,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:27,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-06 13:10:27,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:27,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:10:27,538 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-06 13:10:27,539 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 25 treesize of output 25 [2025-02-06 13:10:27,617 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2025-02-06 13:10:27,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2025-02-06 13:10:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:27,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:27,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795298753] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:27,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:10:27,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 15 [2025-02-06 13:10:27,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137331552] [2025-02-06 13:10:27,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:27,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:10:27,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:27,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:10:27,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:10:28,283 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2025-02-06 13:10:28,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 481 flow. Second operand has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 13:10:28,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:28,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2025-02-06 13:10:28,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:28,585 INFO L124 PetriNetUnfolderBase]: 1374/3099 cut-off events. [2025-02-06 13:10:28,586 INFO L125 PetriNetUnfolderBase]: For 3537/3936 co-relation queries the response was YES. [2025-02-06 13:10:28,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8107 conditions, 3099 events. 1374/3099 cut-off events. For 3537/3936 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23082 event pairs, 702 based on Foata normal form. 180/2854 useless extension candidates. Maximal degree in co-relation 2684. Up to 1588 conditions per place. [2025-02-06 13:10:28,599 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 64 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2025-02-06 13:10:28,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 106 transitions, 688 flow [2025-02-06 13:10:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:10:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:10:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 402 transitions. [2025-02-06 13:10:28,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.628125 [2025-02-06 13:10:28,601 INFO L175 Difference]: Start difference. First operand has 92 places, 93 transitions, 481 flow. Second operand 8 states and 402 transitions. [2025-02-06 13:10:28,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 106 transitions, 688 flow [2025-02-06 13:10:28,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 106 transitions, 674 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:10:28,606 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 513 flow [2025-02-06 13:10:28,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2025-02-06 13:10:28,607 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 18 predicate places. [2025-02-06 13:10:28,607 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 513 flow [2025-02-06 13:10:28,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 13:10:28,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:28,607 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] [2025-02-06 13:10:28,615 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 13:10:28,812 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,SelfDestructingSolverStorable16 [2025-02-06 13:10:28,812 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:28,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:28,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1374367878, now seen corresponding path program 1 times [2025-02-06 13:10:28,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:28,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853618373] [2025-02-06 13:10:28,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:28,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:28,821 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:10:28,833 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:10:28,833 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:28,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 13:10:29,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:29,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853618373] [2025-02-06 13:10:29,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853618373] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:29,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320532214] [2025-02-06 13:10:29,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:29,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:29,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:29,109 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 13:10:29,112 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 13:10:29,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-06 13:10:29,207 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 13:10:29,207 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:29,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:29,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-06 13:10:29,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:29,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:10:29,292 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-06 13:10:29,293 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 25 treesize of output 25 [2025-02-06 13:10:29,379 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2025-02-06 13:10:29,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2025-02-06 13:10:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:29,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:29,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320532214] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:29,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:10:29,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 16 [2025-02-06 13:10:29,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913790391] [2025-02-06 13:10:29,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:29,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:10:29,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:29,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:10:29,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2025-02-06 13:10:30,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2025-02-06 13:10:30,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 513 flow. Second operand has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 13:10:30,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:30,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2025-02-06 13:10:30,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:30,735 INFO L124 PetriNetUnfolderBase]: 1773/3684 cut-off events. [2025-02-06 13:10:30,736 INFO L125 PetriNetUnfolderBase]: For 10261/11161 co-relation queries the response was YES. [2025-02-06 13:10:30,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10635 conditions, 3684 events. 1773/3684 cut-off events. For 10261/11161 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 26927 event pairs, 702 based on Foata normal form. 69/3176 useless extension candidates. Maximal degree in co-relation 3527. Up to 1588 conditions per place. [2025-02-06 13:10:30,753 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 68 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2025-02-06 13:10:30,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 107 transitions, 744 flow [2025-02-06 13:10:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:10:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:10:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 351 transitions. [2025-02-06 13:10:30,755 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6267857142857143 [2025-02-06 13:10:30,755 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 513 flow. Second operand 7 states and 351 transitions. [2025-02-06 13:10:30,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 107 transitions, 744 flow [2025-02-06 13:10:30,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 107 transitions, 705 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-02-06 13:10:30,760 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 525 flow [2025-02-06 13:10:30,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2025-02-06 13:10:30,761 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 19 predicate places. [2025-02-06 13:10:30,761 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 525 flow [2025-02-06 13:10:30,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 13:10:30,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:30,762 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:30,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 13:10:30,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 13:10:30,962 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:30,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 344269351, now seen corresponding path program 1 times [2025-02-06 13:10:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:30,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006463327] [2025-02-06 13:10:30,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:30,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:30,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:10:30,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:10:30,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:30,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:31,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:31,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006463327] [2025-02-06 13:10:31,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006463327] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:31,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387923788] [2025-02-06 13:10:31,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:31,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:31,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:31,123 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 13:10:31,125 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 13:10:31,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:10:31,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:10:31,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:31,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:31,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 13:10:31,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:31,234 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 13:10:31,258 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 15 treesize of output 11 [2025-02-06 13:10:31,276 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 13:10:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:31,318 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:31,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387923788] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:31,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:10:31,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2025-02-06 13:10:31,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030252346] [2025-02-06 13:10:31,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:31,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 13:10:31,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:31,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 13:10:31,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:10:31,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2025-02-06 13:10:31,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 525 flow. Second operand has 7 states, 7 states have (on average 46.57142857142857) internal successors, (326), 7 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 13:10:31,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:31,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2025-02-06 13:10:31,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:31,975 INFO L124 PetriNetUnfolderBase]: 1503/3417 cut-off events. [2025-02-06 13:10:31,975 INFO L125 PetriNetUnfolderBase]: For 7346/8027 co-relation queries the response was YES. [2025-02-06 13:10:31,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10331 conditions, 3417 events. 1503/3417 cut-off events. For 7346/8027 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 26188 event pairs, 702 based on Foata normal form. 123/3070 useless extension candidates. Maximal degree in co-relation 3425. Up to 1693 conditions per place. [2025-02-06 13:10:31,987 INFO L140 encePairwiseOnDemand]: 72/80 looper letters, 69 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2025-02-06 13:10:31,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 108 transitions, 755 flow [2025-02-06 13:10:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:10:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:10:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 357 transitions. [2025-02-06 13:10:31,989 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6375 [2025-02-06 13:10:31,989 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 525 flow. Second operand 7 states and 357 transitions. [2025-02-06 13:10:31,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 108 transitions, 755 flow [2025-02-06 13:10:31,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 108 transitions, 736 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:10:31,995 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 545 flow [2025-02-06 13:10:31,995 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=545, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2025-02-06 13:10:31,996 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2025-02-06 13:10:31,996 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 545 flow [2025-02-06 13:10:31,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.57142857142857) internal successors, (326), 7 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 13:10:31,996 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:31,996 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:32,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:32,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:32,201 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:32,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:32,201 INFO L85 PathProgramCache]: Analyzing trace with hash 318330263, now seen corresponding path program 1 times [2025-02-06 13:10:32,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:32,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380856051] [2025-02-06 13:10:32,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:32,209 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:10:32,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:10:32,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:32,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:10:32,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:32,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380856051] [2025-02-06 13:10:32,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380856051] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:32,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651025571] [2025-02-06 13:10:32,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:32,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:32,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:32,523 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 13:10:32,524 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 13:10:32,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:10:32,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:10:32,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:32,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:32,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-06 13:10:32,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:32,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:10:32,713 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-06 13:10:32,714 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 20 treesize of output 22 [2025-02-06 13:10:32,840 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2025-02-06 13:10:32,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2025-02-06 13:10:32,914 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2025-02-06 13:10:32,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2025-02-06 13:10:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:33,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:33,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651025571] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:33,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:33,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 22 [2025-02-06 13:10:33,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984831919] [2025-02-06 13:10:33,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:33,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:10:33,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:33,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:10:33,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:10:35,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 80 [2025-02-06 13:10:35,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 545 flow. Second operand has 24 states, 24 states have (on average 31.583333333333332) internal successors, (758), 24 states have internal predecessors, (758), 0 states have call successors, (0), 0 states 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 13:10:35,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:35,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 80 [2025-02-06 13:10:35,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:37,017 INFO L124 PetriNetUnfolderBase]: 3829/6654 cut-off events. [2025-02-06 13:10:37,017 INFO L125 PetriNetUnfolderBase]: For 22010/23500 co-relation queries the response was YES. [2025-02-06 13:10:37,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22748 conditions, 6654 events. 3829/6654 cut-off events. For 22010/23500 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 45405 event pairs, 1164 based on Foata normal form. 0/5877 useless extension candidates. Maximal degree in co-relation 7545. Up to 1574 conditions per place. [2025-02-06 13:10:37,051 INFO L140 encePairwiseOnDemand]: 65/80 looper letters, 142 selfloop transitions, 44 changer transitions 0/208 dead transitions. [2025-02-06 13:10:37,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 208 transitions, 1652 flow [2025-02-06 13:10:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 13:10:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 13:10:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 699 transitions. [2025-02-06 13:10:37,053 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4598684210526316 [2025-02-06 13:10:37,053 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 545 flow. Second operand 19 states and 699 transitions. [2025-02-06 13:10:37,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 208 transitions, 1652 flow [2025-02-06 13:10:37,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 208 transitions, 1589 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:10:37,066 INFO L231 Difference]: Finished difference. Result has 113 places, 107 transitions, 689 flow [2025-02-06 13:10:37,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=689, PETRI_PLACES=113, PETRI_TRANSITIONS=107} [2025-02-06 13:10:37,066 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 34 predicate places. [2025-02-06 13:10:37,066 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 107 transitions, 689 flow [2025-02-06 13:10:37,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 31.583333333333332) internal successors, (758), 24 states have internal predecessors, (758), 0 states have call successors, (0), 0 states 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 13:10:37,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:37,067 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:37,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:37,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:37,271 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:37,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash 344269350, now seen corresponding path program 1 times [2025-02-06 13:10:37,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:37,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043251969] [2025-02-06 13:10:37,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:37,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:37,279 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:10:37,284 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:10:37,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:37,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:37,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:37,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043251969] [2025-02-06 13:10:37,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043251969] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:10:37,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:10:37,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:10:37,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286126547] [2025-02-06 13:10:37,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:10:37,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:10:37,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:37,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:10:37,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:10:37,380 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 80 [2025-02-06 13:10:37,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 689 flow. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:10:37,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:37,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 80 [2025-02-06 13:10:37,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:37,643 INFO L124 PetriNetUnfolderBase]: 1237/2511 cut-off events. [2025-02-06 13:10:37,643 INFO L125 PetriNetUnfolderBase]: For 7370/8009 co-relation queries the response was YES. [2025-02-06 13:10:37,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9123 conditions, 2511 events. 1237/2511 cut-off events. For 7370/8009 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16443 event pairs, 702 based on Foata normal form. 180/2415 useless extension candidates. Maximal degree in co-relation 6068. Up to 1694 conditions per place. [2025-02-06 13:10:37,665 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 72 selfloop transitions, 6 changer transitions 0/104 dead transitions. [2025-02-06 13:10:37,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 104 transitions, 839 flow [2025-02-06 13:10:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:10:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:10:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2025-02-06 13:10:37,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5875 [2025-02-06 13:10:37,666 INFO L175 Difference]: Start difference. First operand has 113 places, 107 transitions, 689 flow. Second operand 4 states and 188 transitions. [2025-02-06 13:10:37,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 104 transitions, 839 flow [2025-02-06 13:10:37,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 104 transitions, 814 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:10:37,673 INFO L231 Difference]: Finished difference. Result has 109 places, 104 transitions, 670 flow [2025-02-06 13:10:37,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=670, PETRI_PLACES=109, PETRI_TRANSITIONS=104} [2025-02-06 13:10:37,674 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 30 predicate places. [2025-02-06 13:10:37,674 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 104 transitions, 670 flow [2025-02-06 13:10:37,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:10:37,674 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:37,674 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:37,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-06 13:10:37,674 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:37,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:37,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1158259718, now seen corresponding path program 1 times [2025-02-06 13:10:37,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:37,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752610138] [2025-02-06 13:10:37,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:37,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:37,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:10:37,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:10:37,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:37,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:10:37,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:37,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752610138] [2025-02-06 13:10:37,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752610138] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:37,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22042125] [2025-02-06 13:10:37,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:37,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:37,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:37,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:37,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 13:10:37,879 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 13:10:37,902 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 13:10:37,902 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:37,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:37,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:10:37,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:10:37,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:10:38,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22042125] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:38,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:38,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 13:10:38,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920941624] [2025-02-06 13:10:38,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:38,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 13:10:38,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:38,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 13:10:38,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-02-06 13:10:38,113 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2025-02-06 13:10:38,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 104 transitions, 670 flow. Second operand has 14 states, 14 states have (on average 46.357142857142854) internal successors, (649), 14 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 13:10:38,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:38,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2025-02-06 13:10:38,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:38,432 INFO L124 PetriNetUnfolderBase]: 1513/2910 cut-off events. [2025-02-06 13:10:38,432 INFO L125 PetriNetUnfolderBase]: For 7518/8054 co-relation queries the response was YES. [2025-02-06 13:10:38,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10099 conditions, 2910 events. 1513/2910 cut-off events. For 7518/8054 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17952 event pairs, 578 based on Foata normal form. 68/2753 useless extension candidates. Maximal degree in co-relation 7008. Up to 818 conditions per place. [2025-02-06 13:10:38,446 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 95 selfloop transitions, 45 changer transitions 0/165 dead transitions. [2025-02-06 13:10:38,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 165 transitions, 1255 flow [2025-02-06 13:10:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:10:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:10:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 548 transitions. [2025-02-06 13:10:38,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.685 [2025-02-06 13:10:38,448 INFO L175 Difference]: Start difference. First operand has 109 places, 104 transitions, 670 flow. Second operand 10 states and 548 transitions. [2025-02-06 13:10:38,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 165 transitions, 1255 flow [2025-02-06 13:10:38,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 165 transitions, 1248 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:10:38,455 INFO L231 Difference]: Finished difference. Result has 119 places, 108 transitions, 808 flow [2025-02-06 13:10:38,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=808, PETRI_PLACES=119, PETRI_TRANSITIONS=108} [2025-02-06 13:10:38,456 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 40 predicate places. [2025-02-06 13:10:38,456 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 108 transitions, 808 flow [2025-02-06 13:10:38,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.357142857142854) internal successors, (649), 14 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 13:10:38,456 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:38,456 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:38,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:38,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:38,657 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:38,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:38,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1278304180, now seen corresponding path program 1 times [2025-02-06 13:10:38,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:38,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623083404] [2025-02-06 13:10:38,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:38,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:38,664 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:10:38,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:10:38,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:38,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:38,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:38,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623083404] [2025-02-06 13:10:38,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623083404] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:38,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998551431] [2025-02-06 13:10:38,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:38,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:38,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:38,988 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:38,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 13:10:39,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:10:39,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:10:39,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:39,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:39,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-06 13:10:39,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:39,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:10:39,203 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-06 13:10:39,203 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 25 treesize of output 25 [2025-02-06 13:10:39,295 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2025-02-06 13:10:39,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2025-02-06 13:10:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:39,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:39,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998551431] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:39,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:39,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 26 [2025-02-06 13:10:39,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796047496] [2025-02-06 13:10:39,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:39,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 13:10:39,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:39,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 13:10:39,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2025-02-06 13:10:42,010 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 80 [2025-02-06 13:10:42,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 108 transitions, 808 flow. Second operand has 28 states, 28 states have (on average 34.25) internal successors, (959), 28 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 13:10:42,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:42,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 80 [2025-02-06 13:10:42,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:43,350 INFO L124 PetriNetUnfolderBase]: 3305/5732 cut-off events. [2025-02-06 13:10:43,350 INFO L125 PetriNetUnfolderBase]: For 21187/21907 co-relation queries the response was YES. [2025-02-06 13:10:43,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21358 conditions, 5732 events. 3305/5732 cut-off events. For 21187/21907 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 37075 event pairs, 1028 based on Foata normal form. 0/5482 useless extension candidates. Maximal degree in co-relation 14696. Up to 1418 conditions per place. [2025-02-06 13:10:43,382 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 149 selfloop transitions, 42 changer transitions 0/209 dead transitions. [2025-02-06 13:10:43,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 209 transitions, 1947 flow [2025-02-06 13:10:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-06 13:10:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-02-06 13:10:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 847 transitions. [2025-02-06 13:10:43,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48125 [2025-02-06 13:10:43,384 INFO L175 Difference]: Start difference. First operand has 119 places, 108 transitions, 808 flow. Second operand 22 states and 847 transitions. [2025-02-06 13:10:43,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 209 transitions, 1947 flow [2025-02-06 13:10:43,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 209 transitions, 1856 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-02-06 13:10:43,402 INFO L231 Difference]: Finished difference. Result has 134 places, 109 transitions, 833 flow [2025-02-06 13:10:43,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=833, PETRI_PLACES=134, PETRI_TRANSITIONS=109} [2025-02-06 13:10:43,403 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 55 predicate places. [2025-02-06 13:10:43,403 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 109 transitions, 833 flow [2025-02-06 13:10:43,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 34.25) internal successors, (959), 28 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 13:10:43,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:43,404 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 13:10:43,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 13:10:43,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:43,605 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:43,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash 972724537, now seen corresponding path program 1 times [2025-02-06 13:10:43,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:43,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311446499] [2025-02-06 13:10:43,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:43,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:43,612 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:10:43,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:10:43,619 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:43,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:43,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:43,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311446499] [2025-02-06 13:10:43,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311446499] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:43,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111673781] [2025-02-06 13:10:43,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:43,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:43,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:43,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:43,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 13:10:43,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:10:43,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:10:43,952 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:43,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:43,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-06 13:10:43,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:44,002 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 13:10:44,037 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 15 treesize of output 11 [2025-02-06 13:10:44,072 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 13:10:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:44,245 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:10:44,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111673781] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:44,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:44,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2025-02-06 13:10:44,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342471730] [2025-02-06 13:10:44,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:44,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 13:10:44,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:44,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 13:10:44,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2025-02-06 13:10:45,696 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 80 [2025-02-06 13:10:45,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 109 transitions, 833 flow. Second operand has 26 states, 26 states have (on average 41.42307692307692) internal successors, (1077), 26 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states 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 13:10:45,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:45,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 80 [2025-02-06 13:10:45,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:46,649 INFO L124 PetriNetUnfolderBase]: 2140/3667 cut-off events. [2025-02-06 13:10:46,649 INFO L125 PetriNetUnfolderBase]: For 19409/20941 co-relation queries the response was YES. [2025-02-06 13:10:46,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15986 conditions, 3667 events. 2140/3667 cut-off events. For 19409/20941 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 22338 event pairs, 648 based on Foata normal form. 148/3505 useless extension candidates. Maximal degree in co-relation 12333. Up to 809 conditions per place. [2025-02-06 13:10:46,675 INFO L140 encePairwiseOnDemand]: 62/80 looper letters, 183 selfloop transitions, 53 changer transitions 0/258 dead transitions. [2025-02-06 13:10:46,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 258 transitions, 2396 flow [2025-02-06 13:10:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 13:10:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 13:10:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 927 transitions. [2025-02-06 13:10:46,678 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6098684210526316 [2025-02-06 13:10:46,678 INFO L175 Difference]: Start difference. First operand has 134 places, 109 transitions, 833 flow. Second operand 19 states and 927 transitions. [2025-02-06 13:10:46,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 258 transitions, 2396 flow [2025-02-06 13:10:46,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 258 transitions, 2284 flow, removed 6 selfloop flow, removed 14 redundant places. [2025-02-06 13:10:46,695 INFO L231 Difference]: Finished difference. Result has 138 places, 119 transitions, 883 flow [2025-02-06 13:10:46,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=883, PETRI_PLACES=138, PETRI_TRANSITIONS=119} [2025-02-06 13:10:46,696 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 59 predicate places. [2025-02-06 13:10:46,696 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 119 transitions, 883 flow [2025-02-06 13:10:46,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 41.42307692307692) internal successors, (1077), 26 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states 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 13:10:46,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:46,697 INFO L206 CegarLoopForPetriNet]: trace histogram [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 13:10:46,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-06 13:10:46,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-06 13:10:46,901 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:46,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:46,901 INFO L85 PathProgramCache]: Analyzing trace with hash 130386668, now seen corresponding path program 1 times [2025-02-06 13:10:46,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:46,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014755543] [2025-02-06 13:10:46,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:46,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:46,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:10:46,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:10:46,917 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:46,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:10:47,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:47,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014755543] [2025-02-06 13:10:47,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014755543] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:47,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141857854] [2025-02-06 13:10:47,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:47,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:47,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:47,028 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:47,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 13:10:47,102 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 13:10:47,138 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 13:10:47,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:47,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:47,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 13:10:47,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:10:47,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:10:47,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141857854] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:47,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:47,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-02-06 13:10:47,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012640165] [2025-02-06 13:10:47,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:47,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 13:10:47,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:47,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 13:10:47,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-02-06 13:10:47,432 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2025-02-06 13:10:47,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 119 transitions, 883 flow. Second operand has 16 states, 16 states have (on average 46.4375) internal successors, (743), 16 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 13:10:47,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:47,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2025-02-06 13:10:47,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:47,900 INFO L124 PetriNetUnfolderBase]: 2087/3708 cut-off events. [2025-02-06 13:10:47,900 INFO L125 PetriNetUnfolderBase]: For 17296/18252 co-relation queries the response was YES. [2025-02-06 13:10:47,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15231 conditions, 3708 events. 2087/3708 cut-off events. For 17296/18252 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22943 event pairs, 739 based on Foata normal form. 123/3716 useless extension candidates. Maximal degree in co-relation 12049. Up to 904 conditions per place. [2025-02-06 13:10:47,921 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 104 selfloop transitions, 45 changer transitions 0/175 dead transitions. [2025-02-06 13:10:47,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 175 transitions, 1505 flow [2025-02-06 13:10:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 13:10:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 13:10:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 546 transitions. [2025-02-06 13:10:47,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6825 [2025-02-06 13:10:47,923 INFO L175 Difference]: Start difference. First operand has 138 places, 119 transitions, 883 flow. Second operand 10 states and 546 transitions. [2025-02-06 13:10:47,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 175 transitions, 1505 flow [2025-02-06 13:10:47,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 175 transitions, 1442 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-02-06 13:10:47,937 INFO L231 Difference]: Finished difference. Result has 143 places, 123 transitions, 965 flow [2025-02-06 13:10:47,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=965, PETRI_PLACES=143, PETRI_TRANSITIONS=123} [2025-02-06 13:10:47,937 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 64 predicate places. [2025-02-06 13:10:47,938 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 123 transitions, 965 flow [2025-02-06 13:10:47,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 46.4375) internal successors, (743), 16 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 13:10:47,938 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:47,938 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:10:47,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 13:10:48,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-06 13:10:48,139 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:48,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:48,139 INFO L85 PathProgramCache]: Analyzing trace with hash 143598110, now seen corresponding path program 2 times [2025-02-06 13:10:48,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:48,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774112161] [2025-02-06 13:10:48,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:10:48,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:48,148 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-06 13:10:48,168 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 13:10:48,169 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:10:48,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-06 13:10:48,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:48,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774112161] [2025-02-06 13:10:48,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774112161] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:48,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35977156] [2025-02-06 13:10:48,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:10:48,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:48,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:48,533 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:48,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 13:10:48,610 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-06 13:10:48,645 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 13:10:48,645 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:10:48,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:48,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-06 13:10:48,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:48,658 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 13:10:48,664 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 13:10:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:10:48,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2025-02-06 13:10:48,758 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-06 13:10:48,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-06 13:10:48,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:10:48,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2025-02-06 13:10:48,819 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:10:48,819 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 13:10:48,876 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 13:10:48,876 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 23 treesize of output 20 [2025-02-06 13:10:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-06 13:10:49,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:53,291 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_603 Int)) (or (forall ((|v_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base_285| Int)) (<= (+ c_~A~0.offset 8) (select (store |c_#length| |v_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base_285| v_ArrVal_603) c_~A~0.base))) (< v_ArrVal_603 (* 4 (mod c_~N~0 1073741824))))) (<= 0 (+ c_~A~0.offset 4))) is different from false [2025-02-06 13:10:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-06 13:10:54,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35977156] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:54,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:54,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2025-02-06 13:10:54,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207107271] [2025-02-06 13:10:54,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:54,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 13:10:54,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:54,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 13:10:54,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=528, Unknown=1, NotChecked=46, Total=650 [2025-02-06 13:10:54,299 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 80 [2025-02-06 13:10:54,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 123 transitions, 965 flow. Second operand has 26 states, 26 states have (on average 7.615384615384615) internal successors, (198), 26 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 13:10:54,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:10:54,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 80 [2025-02-06 13:10:54,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:10:57,195 INFO L124 PetriNetUnfolderBase]: 9006/12613 cut-off events. [2025-02-06 13:10:57,195 INFO L125 PetriNetUnfolderBase]: For 33667/33905 co-relation queries the response was YES. [2025-02-06 13:10:57,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47728 conditions, 12613 events. 9006/12613 cut-off events. For 33667/33905 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 61566 event pairs, 937 based on Foata normal form. 315/12423 useless extension candidates. Maximal degree in co-relation 47679. Up to 3276 conditions per place. [2025-02-06 13:10:57,270 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 238 selfloop transitions, 37 changer transitions 0/277 dead transitions. [2025-02-06 13:10:57,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 277 transitions, 2224 flow [2025-02-06 13:10:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 13:10:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 13:10:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 343 transitions. [2025-02-06 13:10:57,271 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2256578947368421 [2025-02-06 13:10:57,272 INFO L175 Difference]: Start difference. First operand has 143 places, 123 transitions, 965 flow. Second operand 19 states and 343 transitions. [2025-02-06 13:10:57,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 277 transitions, 2224 flow [2025-02-06 13:10:57,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 277 transitions, 2062 flow, removed 10 selfloop flow, removed 14 redundant places. [2025-02-06 13:10:57,291 INFO L231 Difference]: Finished difference. Result has 140 places, 106 transitions, 805 flow [2025-02-06 13:10:57,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=805, PETRI_PLACES=140, PETRI_TRANSITIONS=106} [2025-02-06 13:10:57,292 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 61 predicate places. [2025-02-06 13:10:57,292 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 106 transitions, 805 flow [2025-02-06 13:10:57,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.615384615384615) internal successors, (198), 26 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 13:10:57,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:10:57,292 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] [2025-02-06 13:10:57,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 13:10:57,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:57,493 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:10:57,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:10:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash 156574709, now seen corresponding path program 1 times [2025-02-06 13:10:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:10:57,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96637770] [2025-02-06 13:10:57,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:10:57,502 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:10:57,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:10:57,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:57,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:10:58,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:10:58,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96637770] [2025-02-06 13:10:58,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96637770] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:10:58,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509639559] [2025-02-06 13:10:58,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:10:58,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:10:58,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:10:58,048 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:10:58,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 13:10:58,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:10:58,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:10:58,143 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:10:58,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:10:58,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-06 13:10:58,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:10:58,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:10:58,195 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-06 13:10:58,195 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 20 treesize of output 22 [2025-02-06 13:10:58,257 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2025-02-06 13:10:58,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2025-02-06 13:10:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:10:58,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:10:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:10:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509639559] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:10:58,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:10:58,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 28 [2025-02-06 13:10:58,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565976910] [2025-02-06 13:10:58,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:10:58,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-06 13:10:58,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:10:58,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-06 13:10:58,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2025-02-06 13:11:01,658 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 80 [2025-02-06 13:11:01,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 106 transitions, 805 flow. Second operand has 29 states, 29 states have (on average 36.37931034482759) internal successors, (1055), 29 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states 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 13:11:01,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:01,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 80 [2025-02-06 13:11:01,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:03,239 INFO L124 PetriNetUnfolderBase]: 1567/2749 cut-off events. [2025-02-06 13:11:03,239 INFO L125 PetriNetUnfolderBase]: For 15703/16555 co-relation queries the response was YES. [2025-02-06 13:11:03,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11599 conditions, 2749 events. 1567/2749 cut-off events. For 15703/16555 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 14654 event pairs, 573 based on Foata normal form. 102/2766 useless extension candidates. Maximal degree in co-relation 7643. Up to 651 conditions per place. [2025-02-06 13:11:03,251 INFO L140 encePairwiseOnDemand]: 65/80 looper letters, 122 selfloop transitions, 31 changer transitions 0/172 dead transitions. [2025-02-06 13:11:03,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 172 transitions, 1446 flow [2025-02-06 13:11:03,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 13:11:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 13:11:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 782 transitions. [2025-02-06 13:11:03,253 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5144736842105263 [2025-02-06 13:11:03,253 INFO L175 Difference]: Start difference. First operand has 140 places, 106 transitions, 805 flow. Second operand 19 states and 782 transitions. [2025-02-06 13:11:03,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 172 transitions, 1446 flow [2025-02-06 13:11:03,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 1368 flow, removed 6 selfloop flow, removed 15 redundant places. [2025-02-06 13:11:03,261 INFO L231 Difference]: Finished difference. Result has 146 places, 106 transitions, 793 flow [2025-02-06 13:11:03,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=793, PETRI_PLACES=146, PETRI_TRANSITIONS=106} [2025-02-06 13:11:03,262 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 67 predicate places. [2025-02-06 13:11:03,262 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 106 transitions, 793 flow [2025-02-06 13:11:03,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 36.37931034482759) internal successors, (1055), 29 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states 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 13:11:03,262 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:03,262 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] [2025-02-06 13:11:03,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 13:11:03,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:03,463 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:11:03,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash 465317766, now seen corresponding path program 1 times [2025-02-06 13:11:03,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:03,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789376024] [2025-02-06 13:11:03,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:03,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:03,473 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:11:03,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:11:03,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:03,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:11:03,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789376024] [2025-02-06 13:11:03,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789376024] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105643954] [2025-02-06 13:11:03,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:03,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:03,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:03,540 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:03,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 13:11:03,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 13:11:03,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 13:11:03,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:03,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:03,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:11:03,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:11:03,672 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:11:03,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105643954] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:03,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:11:03,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-06 13:11:03,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143097876] [2025-02-06 13:11:03,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:03,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:11:03,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:03,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:11:03,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:11:03,731 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2025-02-06 13:11:03,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 106 transitions, 793 flow. Second operand has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 13:11:03,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:03,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2025-02-06 13:11:03,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:03,910 INFO L124 PetriNetUnfolderBase]: 1111/2188 cut-off events. [2025-02-06 13:11:03,910 INFO L125 PetriNetUnfolderBase]: For 11444/11995 co-relation queries the response was YES. [2025-02-06 13:11:03,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9117 conditions, 2188 events. 1111/2188 cut-off events. For 11444/11995 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 12428 event pairs, 406 based on Foata normal form. 34/2111 useless extension candidates. Maximal degree in co-relation 6093. Up to 927 conditions per place. [2025-02-06 13:11:03,921 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 92 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2025-02-06 13:11:03,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 126 transitions, 1123 flow [2025-02-06 13:11:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:11:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:11:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2025-02-06 13:11:03,922 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.67 [2025-02-06 13:11:03,922 INFO L175 Difference]: Start difference. First operand has 146 places, 106 transitions, 793 flow. Second operand 5 states and 268 transitions. [2025-02-06 13:11:03,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 126 transitions, 1123 flow [2025-02-06 13:11:03,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 126 transitions, 1031 flow, removed 0 selfloop flow, removed 20 redundant places. [2025-02-06 13:11:03,929 INFO L231 Difference]: Finished difference. Result has 131 places, 106 transitions, 728 flow [2025-02-06 13:11:03,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=728, PETRI_PLACES=131, PETRI_TRANSITIONS=106} [2025-02-06 13:11:03,929 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 52 predicate places. [2025-02-06 13:11:03,930 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 106 transitions, 728 flow [2025-02-06 13:11:03,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 13:11:03,930 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:03,930 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:03,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-06 13:11:04,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-06 13:11:04,130 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:11:04,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:04,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1842428, now seen corresponding path program 2 times [2025-02-06 13:11:04,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:04,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669288922] [2025-02-06 13:11:04,131 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:04,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:04,138 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-02-06 13:11:04,160 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 13:11:04,160 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:04,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-06 13:11:04,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:04,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669288922] [2025-02-06 13:11:04,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669288922] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:04,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65196945] [2025-02-06 13:11:04,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:04,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:04,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:04,539 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:04,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-06 13:11:04,609 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-02-06 13:11:04,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 13:11:04,638 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:04,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:04,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-02-06 13:11:04,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:04,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:11:04,723 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-06 13:11:04,724 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 25 treesize of output 25 [2025-02-06 13:11:04,799 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2025-02-06 13:11:04,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2025-02-06 13:11:04,872 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2025-02-06 13:11:04,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2025-02-06 13:11:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-06 13:11:05,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-06 13:11:05,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65196945] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:05,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:05,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2025-02-06 13:11:05,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83928181] [2025-02-06 13:11:05,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:05,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-06 13:11:05,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:05,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-06 13:11:05,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2025-02-06 13:11:08,605 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 80 [2025-02-06 13:11:08,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 106 transitions, 728 flow. Second operand has 27 states, 27 states have (on average 31.666666666666668) internal successors, (855), 27 states have internal predecessors, (855), 0 states have call successors, (0), 0 states 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 13:11:08,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:08,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 80 [2025-02-06 13:11:08,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:10,559 INFO L124 PetriNetUnfolderBase]: 3118/5232 cut-off events. [2025-02-06 13:11:10,559 INFO L125 PetriNetUnfolderBase]: For 26147/26655 co-relation queries the response was YES. [2025-02-06 13:11:10,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19752 conditions, 5232 events. 3118/5232 cut-off events. For 26147/26655 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 30441 event pairs, 456 based on Foata normal form. 168/5388 useless extension candidates. Maximal degree in co-relation 15051. Up to 852 conditions per place. [2025-02-06 13:11:10,587 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 166 selfloop transitions, 37 changer transitions 0/224 dead transitions. [2025-02-06 13:11:10,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 224 transitions, 1797 flow [2025-02-06 13:11:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 13:11:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 13:11:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 733 transitions. [2025-02-06 13:11:10,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48223684210526313 [2025-02-06 13:11:10,589 INFO L175 Difference]: Start difference. First operand has 131 places, 106 transitions, 728 flow. Second operand 19 states and 733 transitions. [2025-02-06 13:11:10,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 224 transitions, 1797 flow [2025-02-06 13:11:10,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 224 transitions, 1758 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-02-06 13:11:10,601 INFO L231 Difference]: Finished difference. Result has 147 places, 109 transitions, 816 flow [2025-02-06 13:11:10,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=816, PETRI_PLACES=147, PETRI_TRANSITIONS=109} [2025-02-06 13:11:10,602 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 68 predicate places. [2025-02-06 13:11:10,602 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 109 transitions, 816 flow [2025-02-06 13:11:10,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 31.666666666666668) internal successors, (855), 27 states have internal predecessors, (855), 0 states have call successors, (0), 0 states 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 13:11:10,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:10,603 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:10,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 13:11:10,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:10,803 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:11:10,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:10,804 INFO L85 PathProgramCache]: Analyzing trace with hash 558849280, now seen corresponding path program 1 times [2025-02-06 13:11:10,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:10,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682145735] [2025-02-06 13:11:10,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:10,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:10,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-06 13:11:10,817 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 13:11:10,817 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:10,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:11:11,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:11,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682145735] [2025-02-06 13:11:11,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682145735] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:11,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719114870] [2025-02-06 13:11:11,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:11,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:11,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:11,090 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:11,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-06 13:11:11,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-06 13:11:11,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 13:11:11,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:11,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:11,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-06 13:11:11,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:11,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:11:11,251 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2025-02-06 13:11:11,251 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 16 treesize of output 18 [2025-02-06 13:11:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:11:11,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:11:11,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719114870] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:11,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:11,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2025-02-06 13:11:11,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766474574] [2025-02-06 13:11:11,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:11,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:11:11,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:11,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:11:11,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:11:13,501 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2025-02-06 13:11:13,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 109 transitions, 816 flow. Second operand has 24 states, 24 states have (on average 37.583333333333336) internal successors, (902), 24 states have internal predecessors, (902), 0 states have call successors, (0), 0 states 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 13:11:13,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:13,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2025-02-06 13:11:13,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:14,586 INFO L124 PetriNetUnfolderBase]: 1449/2827 cut-off events. [2025-02-06 13:11:14,587 INFO L125 PetriNetUnfolderBase]: For 18305/18973 co-relation queries the response was YES. [2025-02-06 13:11:14,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12251 conditions, 2827 events. 1449/2827 cut-off events. For 18305/18973 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 16527 event pairs, 647 based on Foata normal form. 42/2771 useless extension candidates. Maximal degree in co-relation 9120. Up to 838 conditions per place. [2025-02-06 13:11:14,600 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 104 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2025-02-06 13:11:14,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 153 transitions, 1338 flow [2025-02-06 13:11:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 13:11:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 13:11:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 629 transitions. [2025-02-06 13:11:14,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5241666666666667 [2025-02-06 13:11:14,601 INFO L175 Difference]: Start difference. First operand has 147 places, 109 transitions, 816 flow. Second operand 15 states and 629 transitions. [2025-02-06 13:11:14,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 153 transitions, 1338 flow [2025-02-06 13:11:14,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 153 transitions, 1229 flow, removed 18 selfloop flow, removed 15 redundant places. [2025-02-06 13:11:14,611 INFO L231 Difference]: Finished difference. Result has 147 places, 109 transitions, 787 flow [2025-02-06 13:11:14,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=787, PETRI_PLACES=147, PETRI_TRANSITIONS=109} [2025-02-06 13:11:14,612 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 68 predicate places. [2025-02-06 13:11:14,612 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 109 transitions, 787 flow [2025-02-06 13:11:14,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 37.583333333333336) internal successors, (902), 24 states have internal predecessors, (902), 0 states have call successors, (0), 0 states 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 13:11:14,612 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:14,612 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] [2025-02-06 13:11:14,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-06 13:11:14,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:14,813 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:11:14,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:14,813 INFO L85 PathProgramCache]: Analyzing trace with hash -57114661, now seen corresponding path program 1 times [2025-02-06 13:11:14,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:14,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231608490] [2025-02-06 13:11:14,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:14,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:14,821 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 13:11:14,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 13:11:14,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:14,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 13:11:15,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231608490] [2025-02-06 13:11:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231608490] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19144432] [2025-02-06 13:11:15,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:15,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:15,382 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:11:15,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-06 13:11:15,456 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 13:11:15,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 13:11:15,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:15,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:15,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-02-06 13:11:15,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:15,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 13:11:15,536 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-02-06 13:11:15,536 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 20 treesize of output 22 [2025-02-06 13:11:15,610 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2025-02-06 13:11:15,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2025-02-06 13:11:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:11:16,018 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:11:16,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19144432] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:16,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:16,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 30 [2025-02-06 13:11:16,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221556666] [2025-02-06 13:11:16,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:16,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-06 13:11:16,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:16,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-06 13:11:16,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2025-02-06 13:11:19,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 80 [2025-02-06 13:11:19,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 109 transitions, 787 flow. Second operand has 31 states, 31 states have (on average 34.41935483870968) internal successors, (1067), 31 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states 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 13:11:19,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:19,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 80 [2025-02-06 13:11:19,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:21,164 INFO L124 PetriNetUnfolderBase]: 3464/5635 cut-off events. [2025-02-06 13:11:21,164 INFO L125 PetriNetUnfolderBase]: For 26964/27100 co-relation queries the response was YES. [2025-02-06 13:11:21,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22971 conditions, 5635 events. 3464/5635 cut-off events. For 26964/27100 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 31705 event pairs, 947 based on Foata normal form. 84/5564 useless extension candidates. Maximal degree in co-relation 17389. Up to 1634 conditions per place. [2025-02-06 13:11:21,192 INFO L140 encePairwiseOnDemand]: 62/80 looper letters, 157 selfloop transitions, 38 changer transitions 0/213 dead transitions. [2025-02-06 13:11:21,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 213 transitions, 1787 flow [2025-02-06 13:11:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-06 13:11:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-06 13:11:21,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 809 transitions. [2025-02-06 13:11:21,194 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.505625 [2025-02-06 13:11:21,194 INFO L175 Difference]: Start difference. First operand has 147 places, 109 transitions, 787 flow. Second operand 20 states and 809 transitions. [2025-02-06 13:11:21,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 213 transitions, 1787 flow [2025-02-06 13:11:21,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 213 transitions, 1756 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:11:21,206 INFO L231 Difference]: Finished difference. Result has 164 places, 114 transitions, 907 flow [2025-02-06 13:11:21,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=907, PETRI_PLACES=164, PETRI_TRANSITIONS=114} [2025-02-06 13:11:21,207 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 85 predicate places. [2025-02-06 13:11:21,207 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 114 transitions, 907 flow [2025-02-06 13:11:21,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 34.41935483870968) internal successors, (1067), 31 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states 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 13:11:21,208 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:21,208 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:21,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-06 13:11:21,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2025-02-06 13:11:21,408 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:11:21,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1770553882, now seen corresponding path program 1 times [2025-02-06 13:11:21,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:21,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389891310] [2025-02-06 13:11:21,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:21,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-06 13:11:21,424 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 13:11:21,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:21,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-06 13:11:21,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:21,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389891310] [2025-02-06 13:11:21,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389891310] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:21,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505873312] [2025-02-06 13:11:21,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:21,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:21,601 INFO L229 MonitoredProcess]: Starting monitored process 23 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 13:11:21,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-06 13:11:21,676 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-06 13:11:21,704 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 13:11:21,704 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:21,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:21,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-06 13:11:21,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:21,720 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 13:11:21,811 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 13:11:21,811 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 32 treesize of output 27 [2025-02-06 13:11:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:11:21,966 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-06 13:11:22,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505873312] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:22,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:22,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 23 [2025-02-06 13:11:22,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592544589] [2025-02-06 13:11:22,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:22,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 13:11:22,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:22,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 13:11:22,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2025-02-06 13:11:23,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 80 [2025-02-06 13:11:23,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 114 transitions, 907 flow. Second operand has 24 states, 24 states have (on average 40.958333333333336) internal successors, (983), 24 states have internal predecessors, (983), 0 states have call successors, (0), 0 states 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 13:11:23,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:23,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 80 [2025-02-06 13:11:23,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:24,812 INFO L124 PetriNetUnfolderBase]: 1946/3231 cut-off events. [2025-02-06 13:11:24,812 INFO L125 PetriNetUnfolderBase]: For 20334/20847 co-relation queries the response was YES. [2025-02-06 13:11:24,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14694 conditions, 3231 events. 1946/3231 cut-off events. For 20334/20847 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 17045 event pairs, 562 based on Foata normal form. 86/3194 useless extension candidates. Maximal degree in co-relation 10080. Up to 689 conditions per place. [2025-02-06 13:11:24,828 INFO L140 encePairwiseOnDemand]: 65/80 looper letters, 139 selfloop transitions, 33 changer transitions 0/198 dead transitions. [2025-02-06 13:11:24,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 198 transitions, 1756 flow [2025-02-06 13:11:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:11:24,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:11:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 679 transitions. [2025-02-06 13:11:24,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.60625 [2025-02-06 13:11:24,830 INFO L175 Difference]: Start difference. First operand has 164 places, 114 transitions, 907 flow. Second operand 14 states and 679 transitions. [2025-02-06 13:11:24,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 198 transitions, 1756 flow [2025-02-06 13:11:24,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 198 transitions, 1687 flow, removed 2 selfloop flow, removed 17 redundant places. [2025-02-06 13:11:24,840 INFO L231 Difference]: Finished difference. Result has 161 places, 115 transitions, 918 flow [2025-02-06 13:11:24,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=918, PETRI_PLACES=161, PETRI_TRANSITIONS=115} [2025-02-06 13:11:24,840 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 82 predicate places. [2025-02-06 13:11:24,841 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 115 transitions, 918 flow [2025-02-06 13:11:24,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 40.958333333333336) internal successors, (983), 24 states have internal predecessors, (983), 0 states have call successors, (0), 0 states 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 13:11:24,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:24,841 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:24,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-06 13:11:25,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-02-06 13:11:25,042 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:11:25,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1386336494, now seen corresponding path program 2 times [2025-02-06 13:11:25,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:25,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434301424] [2025-02-06 13:11:25,042 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:25,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:25,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-06 13:11:25,065 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:11:25,065 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:25,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-06 13:11:25,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434301424] [2025-02-06 13:11:25,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434301424] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:25,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80088003] [2025-02-06 13:11:25,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:25,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:25,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:25,179 INFO L229 MonitoredProcess]: Starting monitored process 24 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 13:11:25,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-06 13:11:25,272 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-06 13:11:25,299 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:11:25,300 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:25,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:25,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 13:11:25,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-06 13:11:25,384 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-06 13:11:25,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80088003] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:25,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:25,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-02-06 13:11:25,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996280172] [2025-02-06 13:11:25,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:25,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 13:11:25,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:25,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 13:11:25,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-02-06 13:11:25,611 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2025-02-06 13:11:25,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 115 transitions, 918 flow. Second operand has 19 states, 19 states have (on average 46.26315789473684) internal successors, (879), 19 states have internal predecessors, (879), 0 states have call successors, (0), 0 states 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 13:11:25,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:25,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2025-02-06 13:11:25,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:26,225 INFO L124 PetriNetUnfolderBase]: 2427/4434 cut-off events. [2025-02-06 13:11:26,225 INFO L125 PetriNetUnfolderBase]: For 31712/32962 co-relation queries the response was YES. [2025-02-06 13:11:26,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20304 conditions, 4434 events. 2427/4434 cut-off events. For 31712/32962 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 26386 event pairs, 914 based on Foata normal form. 69/4353 useless extension candidates. Maximal degree in co-relation 15502. Up to 1311 conditions per place. [2025-02-06 13:11:26,248 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 144 selfloop transitions, 66 changer transitions 0/240 dead transitions. [2025-02-06 13:11:26,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 240 transitions, 2319 flow [2025-02-06 13:11:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 13:11:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 13:11:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 858 transitions. [2025-02-06 13:11:26,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6703125 [2025-02-06 13:11:26,250 INFO L175 Difference]: Start difference. First operand has 161 places, 115 transitions, 918 flow. Second operand 16 states and 858 transitions. [2025-02-06 13:11:26,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 240 transitions, 2319 flow [2025-02-06 13:11:26,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 240 transitions, 2185 flow, removed 1 selfloop flow, removed 11 redundant places. [2025-02-06 13:11:26,265 INFO L231 Difference]: Finished difference. Result has 171 places, 147 transitions, 1337 flow [2025-02-06 13:11:26,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1337, PETRI_PLACES=171, PETRI_TRANSITIONS=147} [2025-02-06 13:11:26,265 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 92 predicate places. [2025-02-06 13:11:26,265 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 147 transitions, 1337 flow [2025-02-06 13:11:26,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 46.26315789473684) internal successors, (879), 19 states have internal predecessors, (879), 0 states have call successors, (0), 0 states 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 13:11:26,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:26,266 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, 1, 1, 1] [2025-02-06 13:11:26,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-02-06 13:11:26,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:26,466 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2025-02-06 13:11:26,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1104607895, now seen corresponding path program 1 times [2025-02-06 13:11:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:26,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067960445] [2025-02-06 13:11:26,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:26,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:26,473 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-06 13:11:26,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:11:26,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:26,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 13:11:26,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:26,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067960445] [2025-02-06 13:11:26,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067960445] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:26,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112031329] [2025-02-06 13:11:26,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:26,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:26,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:26,542 INFO L229 MonitoredProcess]: Starting monitored process 25 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 13:11:26,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-06 13:11:26,621 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-06 13:11:26,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:11:26,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:26,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:26,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:11:26,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 13:11:26,707 INFO L312 TraceCheckSpWp]: Computing backward predicates...