./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 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/chl-chromosome-trans.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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:02:10,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:02:10,730 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 01:02:10,734 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:02:10,734 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:02:10,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:02:10,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:02:10,766 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:02:10,767 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:02:10,767 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:02:10,768 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:02:10,768 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:02:10,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:02:10,768 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:02:10,768 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:02:10,769 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 01:02:10,769 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:02:10,770 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:02:10,770 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:02:10,770 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:02:10,770 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:02:10,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:02:10,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:02:10,770 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:02:10,770 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:02:10,770 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:02:10,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:02:10,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:02:10,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:02:10,771 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:02:10,771 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:02:10,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:02:10,772 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:02:10,772 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:02:10,772 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:02:10,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:02:10,772 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 -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2025-01-10 01:02:11,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:02:11,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:02:11,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:02:11,050 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:02:11,050 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:02:11,051 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2025-01-10 01:02:12,357 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e97e1b9ef/93e9a322361d4080ac1d017359fe3944/FLAG05d99a538 [2025-01-10 01:02:12,618 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:02:12,618 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2025-01-10 01:02:12,628 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e97e1b9ef/93e9a322361d4080ac1d017359fe3944/FLAG05d99a538 [2025-01-10 01:02:12,647 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e97e1b9ef/93e9a322361d4080ac1d017359fe3944 [2025-01-10 01:02:12,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:02:12,651 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:02:12,652 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:02:12,652 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:02:12,657 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:02:12,658 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,659 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f090c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12, skipping insertion in model container [2025-01-10 01:02:12,659 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,676 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:02:12,847 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-10 01:02:12,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:02:12,858 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:02:12,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:02:12,912 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:02:12,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12 WrapperNode [2025-01-10 01:02:12,913 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:02:12,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:02:12,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:02:12,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:02:12,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,950 INFO L138 Inliner]: procedures = 25, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 251 [2025-01-10 01:02:12,950 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:02:12,951 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:02:12,951 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:02:12,951 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:02:12,957 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,961 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,977 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-01-10 01:02:12,978 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,978 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,993 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,994 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,998 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:12,999 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:13,001 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:02:13,002 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:02:13,002 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:02:13,002 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:02:13,003 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (1/1) ... [2025-01-10 01:02:13,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:02:13,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:13,037 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) [2025-01-10 01:02:13,042 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 [2025-01-10 01:02:13,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:02:13,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:02:13,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:02:13,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:02:13,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:02:13,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-01-10 01:02:13,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-01-10 01:02:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:02:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 01:02:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-10 01:02:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-10 01:02:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:02:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:02:13,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:02:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 01:02:13,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 01:02:13,063 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 01:02:13,158 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:02:13,159 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:02:13,601 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:02:13,601 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:02:13,975 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:02:13,975 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 01:02:13,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:02:13 BoogieIcfgContainer [2025-01-10 01:02:13,978 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:02:13,979 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:02:13,979 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:02:13,984 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:02:13,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:02:12" (1/3) ... [2025-01-10 01:02:13,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f359f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:02:13, skipping insertion in model container [2025-01-10 01:02:13,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:02:12" (2/3) ... [2025-01-10 01:02:13,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f359f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:02:13, skipping insertion in model container [2025-01-10 01:02:13,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:02:13" (3/3) ... [2025-01-10 01:02:13,986 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2025-01-10 01:02:14,000 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:02:14,001 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-trans.wvr.c that has 4 procedures, 55 locations, 1 initial locations, 6 loop locations, and 20 error locations. [2025-01-10 01:02:14,002 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:02:14,076 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-01-10 01:02:14,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2025-01-10 01:02:14,146 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2025-01-10 01:02:14,149 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:02:14,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 142 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2025-01-10 01:02:14,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2025-01-10 01:02:14,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2025-01-10 01:02:14,165 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:02:14,178 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;@7d9944c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:02:14,179 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2025-01-10 01:02:14,184 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:02:14,184 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-01-10 01:02:14,184 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:02:14,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:14,185 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:02:14,185 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:14,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:14,189 INFO L85 PathProgramCache]: Analyzing trace with hash 826985, now seen corresponding path program 1 times [2025-01-10 01:02:14,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:14,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134789114] [2025-01-10 01:02:14,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:14,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:14,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:02:14,284 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:02:14,284 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:14,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:14,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:14,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134789114] [2025-01-10 01:02:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134789114] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:14,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:14,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:02:14,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290834871] [2025-01-10 01:02:14,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:14,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:02:14,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:14,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:02:14,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:02:14,513 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-01-10 01:02:14,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:14,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:14,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-01-10 01:02:14,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:14,712 INFO L124 PetriNetUnfolderBase]: 202/461 cut-off events. [2025-01-10 01:02:14,712 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-01-10 01:02:14,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 461 events. 202/461 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2306 event pairs, 124 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 690. Up to 293 conditions per place. [2025-01-10 01:02:14,720 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2025-01-10 01:02:14,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2025-01-10 01:02:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:02:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:02:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2025-01-10 01:02:14,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2025-01-10 01:02:14,734 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2025-01-10 01:02:14,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2025-01-10 01:02:14,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:14,744 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2025-01-10 01:02:14,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2025-01-10 01:02:14,750 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2025-01-10 01:02:14,751 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2025-01-10 01:02:14,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:14,751 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:14,751 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:02:14,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:02:14,751 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:14,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash 826986, now seen corresponding path program 1 times [2025-01-10 01:02:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:14,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305653348] [2025-01-10 01:02:14,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:14,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:14,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:02:14,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:02:14,790 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:14,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:14,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:14,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305653348] [2025-01-10 01:02:14,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305653348] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:14,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:14,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:02:14,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117975322] [2025-01-10 01:02:14,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:14,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:02:14,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:14,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:02:14,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:02:15,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-01-10 01:02:15,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:15,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:15,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-01-10 01:02:15,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:15,203 INFO L124 PetriNetUnfolderBase]: 202/467 cut-off events. [2025-01-10 01:02:15,203 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:02:15,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795 conditions, 467 events. 202/467 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2304 event pairs, 124 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 752. Up to 305 conditions per place. [2025-01-10 01:02:15,212 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2025-01-10 01:02:15,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 200 flow [2025-01-10 01:02:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:02:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:02:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2025-01-10 01:02:15,213 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2025-01-10 01:02:15,213 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2025-01-10 01:02:15,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 200 flow [2025-01-10 01:02:15,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:02:15,218 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 146 flow [2025-01-10 01:02:15,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2025-01-10 01:02:15,218 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2025-01-10 01:02:15,219 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 146 flow [2025-01-10 01:02:15,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:15,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:15,219 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-01-10 01:02:15,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:02:15,219 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:15,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash 794760019, now seen corresponding path program 1 times [2025-01-10 01:02:15,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:15,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264875333] [2025-01-10 01:02:15,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:15,229 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:02:15,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:02:15,249 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:15,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:15,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:15,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264875333] [2025-01-10 01:02:15,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264875333] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:15,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811111810] [2025-01-10 01:02:15,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:15,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:15,514 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) [2025-01-10 01:02:15,516 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 [2025-01-10 01:02:15,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:02:15,585 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:02:15,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:15,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:15,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:02:15,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:15,632 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 6 treesize of output 5 [2025-01-10 01:02:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:15,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811111810] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:15,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:15,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-01-10 01:02:15,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626314039] [2025-01-10 01:02:15,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:15,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:02:15,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:15,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:02:15,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:02:16,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-01-10 01:02:16,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 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) [2025-01-10 01:02:16,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:16,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-01-10 01:02:16,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:16,317 INFO L124 PetriNetUnfolderBase]: 211/494 cut-off events. [2025-01-10 01:02:16,317 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:02:16,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 494 events. 211/494 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2410 event pairs, 124 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 787. Up to 308 conditions per place. [2025-01-10 01:02:16,324 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 41 selfloop transitions, 24 changer transitions 0/84 dead transitions. [2025-01-10 01:02:16,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 378 flow [2025-01-10 01:02:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:02:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:02:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2025-01-10 01:02:16,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2025-01-10 01:02:16,329 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 146 flow. Second operand 6 states and 230 transitions. [2025-01-10 01:02:16,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 378 flow [2025-01-10 01:02:16,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 84 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 01:02:16,333 INFO L231 Difference]: Finished difference. Result has 59 places, 72 transitions, 313 flow [2025-01-10 01:02:16,333 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=59, PETRI_TRANSITIONS=72} [2025-01-10 01:02:16,334 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2025-01-10 01:02:16,334 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 72 transitions, 313 flow [2025-01-10 01:02:16,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 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) [2025-01-10 01:02:16,335 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:16,335 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-01-10 01:02:16,345 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 [2025-01-10 01:02:16,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:16,536 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:16,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:16,537 INFO L85 PathProgramCache]: Analyzing trace with hash -605344626, now seen corresponding path program 2 times [2025-01-10 01:02:16,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:16,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144629409] [2025-01-10 01:02:16,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:16,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:16,546 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-01-10 01:02:16,555 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:02:16,556 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:02:16,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:16,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:16,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144629409] [2025-01-10 01:02:16,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144629409] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:16,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446705511] [2025-01-10 01:02:16,814 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:16,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:16,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:16,816 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) [2025-01-10 01:02:16,818 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 [2025-01-10 01:02:16,874 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-01-10 01:02:16,892 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:02:16,892 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:02:16,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:16,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:02:16,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:16,912 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 [2025-01-10 01:02:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:17,086 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:02:17,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446705511] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:17,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:17,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2025-01-10 01:02:17,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236954214] [2025-01-10 01:02:17,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:17,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-10 01:02:17,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:17,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-10 01:02:17,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2025-01-10 01:02:17,846 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-01-10 01:02:17,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 313 flow. Second operand has 19 states, 19 states have (on average 27.68421052631579) internal successors, (526), 19 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:17,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:17,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-01-10 01:02:17,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:18,305 INFO L124 PetriNetUnfolderBase]: 211/491 cut-off events. [2025-01-10 01:02:18,306 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2025-01-10 01:02:18,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 491 events. 211/491 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2384 event pairs, 124 based on Foata normal form. 3/401 useless extension candidates. Maximal degree in co-relation 831. Up to 296 conditions per place. [2025-01-10 01:02:18,310 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 22 selfloop transitions, 40 changer transitions 0/81 dead transitions. [2025-01-10 01:02:18,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 81 transitions, 431 flow [2025-01-10 01:02:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:02:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 01:02:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 351 transitions. [2025-01-10 01:02:18,314 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2025-01-10 01:02:18,314 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 313 flow. Second operand 11 states and 351 transitions. [2025-01-10 01:02:18,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 81 transitions, 431 flow [2025-01-10 01:02:18,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 348 flow, removed 16 selfloop flow, removed 5 redundant places. [2025-01-10 01:02:18,319 INFO L231 Difference]: Finished difference. Result has 61 places, 81 transitions, 310 flow [2025-01-10 01:02:18,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=310, PETRI_PLACES=61, PETRI_TRANSITIONS=81} [2025-01-10 01:02:18,320 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2025-01-10 01:02:18,321 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 81 transitions, 310 flow [2025-01-10 01:02:18,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.68421052631579) internal successors, (526), 19 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:18,321 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:18,321 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:18,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-10 01:02:18,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:18,526 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:18,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1213823859, now seen corresponding path program 1 times [2025-01-10 01:02:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:18,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597292415] [2025-01-10 01:02:18,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:18,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-10 01:02:18,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:02:18,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:18,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:18,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:18,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597292415] [2025-01-10 01:02:18,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597292415] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:18,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470358681] [2025-01-10 01:02:18,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:18,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:18,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:18,639 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) [2025-01-10 01:02:18,646 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 [2025-01-10 01:02:18,706 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-10 01:02:18,731 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-10 01:02:18,732 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:18,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:18,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-10 01:02:18,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:18,759 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:02:18,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470358681] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:18,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:18,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2025-01-10 01:02:18,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610422310] [2025-01-10 01:02:18,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:18,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:02:18,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:18,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:02:18,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:02:18,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-01-10 01:02:18,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 81 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 31.875) internal successors, (255), 8 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:18,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:18,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-01-10 01:02:18,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:18,959 INFO L124 PetriNetUnfolderBase]: 202/482 cut-off events. [2025-01-10 01:02:18,959 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:02:18,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 482 events. 202/482 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2297 event pairs, 124 based on Foata normal form. 9/398 useless extension candidates. Maximal degree in co-relation 752. Up to 299 conditions per place. [2025-01-10 01:02:18,963 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 21 changer transitions 0/72 dead transitions. [2025-01-10 01:02:18,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 362 flow [2025-01-10 01:02:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:02:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:02:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2025-01-10 01:02:18,964 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2025-01-10 01:02:18,964 INFO L175 Difference]: Start difference. First operand has 61 places, 81 transitions, 310 flow. Second operand 6 states and 233 transitions. [2025-01-10 01:02:18,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 362 flow [2025-01-10 01:02:18,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 322 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:18,966 INFO L231 Difference]: Finished difference. Result has 60 places, 72 transitions, 258 flow [2025-01-10 01:02:18,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=60, PETRI_TRANSITIONS=72} [2025-01-10 01:02:18,967 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2025-01-10 01:02:18,967 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 72 transitions, 258 flow [2025-01-10 01:02:18,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.875) internal successors, (255), 8 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:18,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:18,968 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:18,975 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 [2025-01-10 01:02:19,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:19,172 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:19,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:19,173 INFO L85 PathProgramCache]: Analyzing trace with hash -393558465, now seen corresponding path program 2 times [2025-01-10 01:02:19,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:19,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758258066] [2025-01-10 01:02:19,174 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:19,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:19,188 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-10 01:02:19,197 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 32 statements. [2025-01-10 01:02:19,198 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:02:19,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-01-10 01:02:19,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758258066] [2025-01-10 01:02:19,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758258066] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:19,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:19,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:02:19,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617048125] [2025-01-10 01:02:19,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:19,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:02:19,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:19,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:02:19,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:02:19,371 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2025-01-10 01:02:19,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 72 transitions, 258 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:19,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:19,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2025-01-10 01:02:19,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:19,528 INFO L124 PetriNetUnfolderBase]: 328/658 cut-off events. [2025-01-10 01:02:19,528 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-01-10 01:02:19,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 658 events. 328/658 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3074 event pairs, 221 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 1114. Up to 472 conditions per place. [2025-01-10 01:02:19,533 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 52 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2025-01-10 01:02:19,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 70 transitions, 364 flow [2025-01-10 01:02:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:02:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:02:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2025-01-10 01:02:19,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2025-01-10 01:02:19,535 INFO L175 Difference]: Start difference. First operand has 60 places, 72 transitions, 258 flow. Second operand 5 states and 143 transitions. [2025-01-10 01:02:19,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 70 transitions, 364 flow [2025-01-10 01:02:19,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 322 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-01-10 01:02:19,538 INFO L231 Difference]: Finished difference. Result has 57 places, 70 transitions, 218 flow [2025-01-10 01:02:19,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=70} [2025-01-10 01:02:19,539 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2025-01-10 01:02:19,539 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 70 transitions, 218 flow [2025-01-10 01:02:19,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:19,539 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:19,539 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:19,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-10 01:02:19,541 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:19,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:19,542 INFO L85 PathProgramCache]: Analyzing trace with hash -393558464, now seen corresponding path program 1 times [2025-01-10 01:02:19,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:19,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462171859] [2025-01-10 01:02:19,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:19,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:19,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-10 01:02:19,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:02:19,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:19,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-01-10 01:02:19,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462171859] [2025-01-10 01:02:19,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462171859] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:19,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798594322] [2025-01-10 01:02:19,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:19,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:19,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:19,762 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) [2025-01-10 01:02:19,765 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 [2025-01-10 01:02:19,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-10 01:02:19,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:02:19,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:19,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:19,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:02:19,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-01-10 01:02:19,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-01-10 01:02:20,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798594322] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:20,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:20,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2025-01-10 01:02:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501241146] [2025-01-10 01:02:20,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:20,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-10 01:02:20,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:20,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-10 01:02:20,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2025-01-10 01:02:20,113 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-01-10 01:02:20,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 70 transitions, 218 flow. Second operand has 17 states, 17 states have (on average 31.41176470588235) internal successors, (534), 17 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:20,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:20,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-01-10 01:02:20,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:20,344 INFO L124 PetriNetUnfolderBase]: 202/468 cut-off events. [2025-01-10 01:02:20,344 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:02:20,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 468 events. 202/468 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2037 event pairs, 124 based on Foata normal form. 2/396 useless extension candidates. Maximal degree in co-relation 732. Up to 299 conditions per place. [2025-01-10 01:02:20,347 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 35 selfloop transitions, 24 changer transitions 0/76 dead transitions. [2025-01-10 01:02:20,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 76 transitions, 360 flow [2025-01-10 01:02:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:02:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:02:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 294 transitions. [2025-01-10 01:02:20,351 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6125 [2025-01-10 01:02:20,351 INFO L175 Difference]: Start difference. First operand has 57 places, 70 transitions, 218 flow. Second operand 8 states and 294 transitions. [2025-01-10 01:02:20,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 76 transitions, 360 flow [2025-01-10 01:02:20,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 355 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:02:20,356 INFO L231 Difference]: Finished difference. Result has 63 places, 76 transitions, 311 flow [2025-01-10 01:02:20,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=311, PETRI_PLACES=63, PETRI_TRANSITIONS=76} [2025-01-10 01:02:20,356 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2025-01-10 01:02:20,356 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 76 transitions, 311 flow [2025-01-10 01:02:20,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 31.41176470588235) internal successors, (534), 17 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:20,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:20,357 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:20,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-10 01:02:20,557 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,SelfDestructingSolverStorable6 [2025-01-10 01:02:20,558 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:20,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:20,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1711686362, now seen corresponding path program 2 times [2025-01-10 01:02:20,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:20,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828476482] [2025-01-10 01:02:20,558 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:02:20,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:20,572 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-01-10 01:02:20,591 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 38 statements. [2025-01-10 01:02:20,593 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:02:20,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-01-10 01:02:20,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:20,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828476482] [2025-01-10 01:02:20,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828476482] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:20,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:20,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:02:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817433804] [2025-01-10 01:02:20,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:20,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-10 01:02:20,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:20,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-10 01:02:20,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-01-10 01:02:21,076 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2025-01-10 01:02:21,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 76 transitions, 311 flow. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:21,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:21,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2025-01-10 01:02:21,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:21,337 INFO L124 PetriNetUnfolderBase]: 652/1229 cut-off events. [2025-01-10 01:02:21,338 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-01-10 01:02:21,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2324 conditions, 1229 events. 652/1229 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6595 event pairs, 267 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 2167. Up to 578 conditions per place. [2025-01-10 01:02:21,345 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 76 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2025-01-10 01:02:21,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 516 flow [2025-01-10 01:02:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:02:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:02:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2025-01-10 01:02:21,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2025-01-10 01:02:21,347 INFO L175 Difference]: Start difference. First operand has 63 places, 76 transitions, 311 flow. Second operand 6 states and 178 transitions. [2025-01-10 01:02:21,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 516 flow [2025-01-10 01:02:21,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 95 transitions, 492 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:02:21,349 INFO L231 Difference]: Finished difference. Result has 65 places, 77 transitions, 305 flow [2025-01-10 01:02:21,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=65, PETRI_TRANSITIONS=77} [2025-01-10 01:02:21,350 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2025-01-10 01:02:21,350 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 77 transitions, 305 flow [2025-01-10 01:02:21,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:21,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:21,350 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:21,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-10 01:02:21,350 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:21,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:21,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1522668887, now seen corresponding path program 1 times [2025-01-10 01:02:21,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:21,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512073245] [2025-01-10 01:02:21,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:21,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:21,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-10 01:02:21,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-10 01:02:21,393 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:21,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-01-10 01:02:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512073245] [2025-01-10 01:02:21,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512073245] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:21,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:21,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:02:21,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709296727] [2025-01-10 01:02:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:21,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:02:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:21,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:02:21,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:02:21,654 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2025-01-10 01:02:21,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 77 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:21,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:21,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2025-01-10 01:02:21,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:21,817 INFO L124 PetriNetUnfolderBase]: 448/945 cut-off events. [2025-01-10 01:02:21,817 INFO L125 PetriNetUnfolderBase]: For 184/213 co-relation queries the response was YES. [2025-01-10 01:02:21,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 945 events. 448/945 cut-off events. For 184/213 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5180 event pairs, 315 based on Foata normal form. 62/897 useless extension candidates. Maximal degree in co-relation 1723. Up to 650 conditions per place. [2025-01-10 01:02:21,823 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 58 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2025-01-10 01:02:21,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 423 flow [2025-01-10 01:02:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:02:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:02:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-01-10 01:02:21,825 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2025-01-10 01:02:21,825 INFO L175 Difference]: Start difference. First operand has 65 places, 77 transitions, 305 flow. Second operand 5 states and 147 transitions. [2025-01-10 01:02:21,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 423 flow [2025-01-10 01:02:21,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 415 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:02:21,827 INFO L231 Difference]: Finished difference. Result has 63 places, 75 transitions, 299 flow [2025-01-10 01:02:21,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=63, PETRI_TRANSITIONS=75} [2025-01-10 01:02:21,828 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2025-01-10 01:02:21,828 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 75 transitions, 299 flow [2025-01-10 01:02:21,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:21,828 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:21,828 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:21,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-01-10 01:02:21,828 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:21,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1522668886, now seen corresponding path program 1 times [2025-01-10 01:02:21,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:21,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721767037] [2025-01-10 01:02:21,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:21,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-10 01:02:21,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-10 01:02:21,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:21,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:22,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:22,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721767037] [2025-01-10 01:02:22,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721767037] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:22,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995111639] [2025-01-10 01:02:22,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:22,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:22,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:22,335 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) [2025-01-10 01:02:22,337 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 [2025-01-10 01:02:22,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-10 01:02:22,460 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-10 01:02:22,460 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:22,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:22,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-01-10 01:02:22,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:22,479 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 [2025-01-10 01:02:22,481 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 [2025-01-10 01:02:22,560 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:22,560 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 [2025-01-10 01:02:22,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 01:02:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:22,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:23,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995111639] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:23,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:02:23,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 24 [2025-01-10 01:02:23,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158205400] [2025-01-10 01:02:23,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:23,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 01:02:23,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:23,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 01:02:23,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2025-01-10 01:02:23,611 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:02:23,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 75 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:23,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:23,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:02:23,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:23,840 INFO L124 PetriNetUnfolderBase]: 400/801 cut-off events. [2025-01-10 01:02:23,840 INFO L125 PetriNetUnfolderBase]: For 80/101 co-relation queries the response was YES. [2025-01-10 01:02:23,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1601 conditions, 801 events. 400/801 cut-off events. For 80/101 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3790 event pairs, 169 based on Foata normal form. 26/742 useless extension candidates. Maximal degree in co-relation 1452. Up to 377 conditions per place. [2025-01-10 01:02:23,845 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 72 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2025-01-10 01:02:23,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 490 flow [2025-01-10 01:02:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:02:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:02:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2025-01-10 01:02:23,847 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-01-10 01:02:23,847 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 299 flow. Second operand 6 states and 216 transitions. [2025-01-10 01:02:23,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 490 flow [2025-01-10 01:02:23,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 485 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:02:23,849 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 308 flow [2025-01-10 01:02:23,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2025-01-10 01:02:23,850 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2025-01-10 01:02:23,850 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 308 flow [2025-01-10 01:02:23,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:23,850 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:23,850 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:23,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-10 01:02:24,056 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,SelfDestructingSolverStorable9 [2025-01-10 01:02:24,056 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:24,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash -7035111, now seen corresponding path program 1 times [2025-01-10 01:02:24,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:24,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471987014] [2025-01-10 01:02:24,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:24,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:24,070 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-10 01:02:24,086 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-10 01:02:24,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:24,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:24,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:24,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471987014] [2025-01-10 01:02:24,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471987014] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:24,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231100098] [2025-01-10 01:02:24,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:24,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:24,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:24,505 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) [2025-01-10 01:02:24,507 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 [2025-01-10 01:02:24,586 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-10 01:02:24,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-10 01:02:24,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:24,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:24,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-01-10 01:02:24,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:24,644 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 [2025-01-10 01:02:24,651 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 [2025-01-10 01:02:24,713 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:24,714 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 [2025-01-10 01:02:24,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 01:02:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:25,080 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:25,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231100098] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:25,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:02:25,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 24 [2025-01-10 01:02:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45326477] [2025-01-10 01:02:25,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:25,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 01:02:25,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:25,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 01:02:25,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2025-01-10 01:02:25,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2025-01-10 01:02:25,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 308 flow. Second operand has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:25,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:25,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2025-01-10 01:02:25,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:26,052 INFO L124 PetriNetUnfolderBase]: 775/1478 cut-off events. [2025-01-10 01:02:26,052 INFO L125 PetriNetUnfolderBase]: For 613/666 co-relation queries the response was YES. [2025-01-10 01:02:26,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3111 conditions, 1478 events. 775/1478 cut-off events. For 613/666 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8319 event pairs, 315 based on Foata normal form. 0/1288 useless extension candidates. Maximal degree in co-relation 2961. Up to 604 conditions per place. [2025-01-10 01:02:26,062 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 72 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2025-01-10 01:02:26,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 512 flow [2025-01-10 01:02:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:02:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:02:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2025-01-10 01:02:26,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2025-01-10 01:02:26,063 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 308 flow. Second operand 6 states and 209 transitions. [2025-01-10 01:02:26,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 512 flow [2025-01-10 01:02:26,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 498 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-01-10 01:02:26,066 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 323 flow [2025-01-10 01:02:26,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=323, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2025-01-10 01:02:26,067 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 8 predicate places. [2025-01-10 01:02:26,067 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 323 flow [2025-01-10 01:02:26,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:26,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:26,067 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:26,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-10 01:02:26,271 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,SelfDestructingSolverStorable10 [2025-01-10 01:02:26,271 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:26,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:26,271 INFO L85 PathProgramCache]: Analyzing trace with hash -218087649, now seen corresponding path program 1 times [2025-01-10 01:02:26,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:26,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633791253] [2025-01-10 01:02:26,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:26,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:26,283 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-10 01:02:26,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 01:02:26,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:26,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-01-10 01:02:26,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633791253] [2025-01-10 01:02:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633791253] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:02:26,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:02:26,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:02:26,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788828819] [2025-01-10 01:02:26,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:26,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:02:26,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:26,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:02:26,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:02:26,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2025-01-10 01:02:26,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:26,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:26,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2025-01-10 01:02:26,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:26,574 INFO L124 PetriNetUnfolderBase]: 525/1088 cut-off events. [2025-01-10 01:02:26,574 INFO L125 PetriNetUnfolderBase]: For 480/538 co-relation queries the response was YES. [2025-01-10 01:02:26,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2405 conditions, 1088 events. 525/1088 cut-off events. For 480/538 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6006 event pairs, 406 based on Foata normal form. 31/1037 useless extension candidates. Maximal degree in co-relation 2253. Up to 773 conditions per place. [2025-01-10 01:02:26,580 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 58 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2025-01-10 01:02:26,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 439 flow [2025-01-10 01:02:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:02:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:02:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2025-01-10 01:02:26,581 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2025-01-10 01:02:26,581 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 323 flow. Second operand 4 states and 127 transitions. [2025-01-10 01:02:26,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 439 flow [2025-01-10 01:02:26,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 431 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:02:26,583 INFO L231 Difference]: Finished difference. Result has 65 places, 74 transitions, 315 flow [2025-01-10 01:02:26,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=315, PETRI_PLACES=65, PETRI_TRANSITIONS=74} [2025-01-10 01:02:26,584 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2025-01-10 01:02:26,584 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 74 transitions, 315 flow [2025-01-10 01:02:26,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:26,584 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:26,584 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:26,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-01-10 01:02:26,584 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:26,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash -218087648, now seen corresponding path program 1 times [2025-01-10 01:02:26,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:26,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931863793] [2025-01-10 01:02:26,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:26,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:26,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-10 01:02:26,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 01:02:26,608 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:26,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-10 01:02:26,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:26,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931863793] [2025-01-10 01:02:26,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931863793] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:26,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70609539] [2025-01-10 01:02:26,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:26,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:26,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:26,901 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) [2025-01-10 01:02:26,903 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 [2025-01-10 01:02:26,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-10 01:02:27,034 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 01:02:27,034 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:27,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:27,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-10 01:02:27,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:27,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:27,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-01-10 01:02:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:27,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70609539] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:27,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:27,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2025-01-10 01:02:27,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464378353] [2025-01-10 01:02:27,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:27,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-10 01:02:27,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:27,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-10 01:02:27,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2025-01-10 01:02:27,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:02:27,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 315 flow. Second operand has 21 states, 21 states have (on average 30.333333333333332) internal successors, (637), 21 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:27,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:27,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:02:27,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:28,544 INFO L124 PetriNetUnfolderBase]: 888/1731 cut-off events. [2025-01-10 01:02:28,544 INFO L125 PetriNetUnfolderBase]: For 580/641 co-relation queries the response was YES. [2025-01-10 01:02:28,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3936 conditions, 1731 events. 888/1731 cut-off events. For 580/641 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9928 event pairs, 315 based on Foata normal form. 92/1729 useless extension candidates. Maximal degree in co-relation 3785. Up to 650 conditions per place. [2025-01-10 01:02:28,556 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 74 selfloop transitions, 19 changer transitions 0/106 dead transitions. [2025-01-10 01:02:28,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 106 transitions, 595 flow [2025-01-10 01:02:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:02:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:02:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2025-01-10 01:02:28,559 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.61 [2025-01-10 01:02:28,559 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 315 flow. Second operand 10 states and 366 transitions. [2025-01-10 01:02:28,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 106 transitions, 595 flow [2025-01-10 01:02:28,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 592 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:02:28,564 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 370 flow [2025-01-10 01:02:28,564 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=370, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2025-01-10 01:02:28,564 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 14 predicate places. [2025-01-10 01:02:28,564 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 370 flow [2025-01-10 01:02:28,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.333333333333332) internal successors, (637), 21 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:28,565 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:28,565 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:28,574 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 [2025-01-10 01:02:28,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:28,765 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:28,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1299076335, now seen corresponding path program 1 times [2025-01-10 01:02:28,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:28,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013702889] [2025-01-10 01:02:28,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:28,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:28,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-10 01:02:28,802 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 01:02:28,802 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:28,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-01-10 01:02:29,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:29,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013702889] [2025-01-10 01:02:29,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013702889] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:29,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541288609] [2025-01-10 01:02:29,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:29,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:29,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:29,506 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) [2025-01-10 01:02:29,507 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 [2025-01-10 01:02:29,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-10 01:02:29,643 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 01:02:29,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:29,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:29,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-01-10 01:02:29,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:29,656 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 [2025-01-10 01:02:29,660 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 [2025-01-10 01:02:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:02:29,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 01:02:29,751 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-01-10 01:02:29,751 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 [2025-01-10 01:02:29,847 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-10 01:02:29,847 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 14 treesize of output 13 [2025-01-10 01:02:29,858 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:29,858 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 [2025-01-10 01:02:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:30,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541288609] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:30,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:30,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2025-01-10 01:02:30,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324981933] [2025-01-10 01:02:30,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:30,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-10 01:02:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:30,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-10 01:02:30,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2025-01-10 01:02:32,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2025-01-10 01:02:32,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 370 flow. Second operand has 32 states, 32 states have (on average 22.21875) internal successors, (711), 32 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:32,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:32,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2025-01-10 01:02:32,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:33,788 INFO L124 PetriNetUnfolderBase]: 3914/6044 cut-off events. [2025-01-10 01:02:33,788 INFO L125 PetriNetUnfolderBase]: For 5742/5949 co-relation queries the response was YES. [2025-01-10 01:02:33,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15739 conditions, 6044 events. 3914/6044 cut-off events. For 5742/5949 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 34441 event pairs, 713 based on Foata normal form. 216/5849 useless extension candidates. Maximal degree in co-relation 15572. Up to 1254 conditions per place. [2025-01-10 01:02:33,828 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 134 selfloop transitions, 18 changer transitions 0/162 dead transitions. [2025-01-10 01:02:33,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 162 transitions, 966 flow [2025-01-10 01:02:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:02:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:02:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 391 transitions. [2025-01-10 01:02:33,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5012820512820513 [2025-01-10 01:02:33,830 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 370 flow. Second operand 13 states and 391 transitions. [2025-01-10 01:02:33,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 162 transitions, 966 flow [2025-01-10 01:02:33,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 162 transitions, 935 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:33,836 INFO L231 Difference]: Finished difference. Result has 84 places, 79 transitions, 404 flow [2025-01-10 01:02:33,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=404, PETRI_PLACES=84, PETRI_TRANSITIONS=79} [2025-01-10 01:02:33,837 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 24 predicate places. [2025-01-10 01:02:33,837 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 79 transitions, 404 flow [2025-01-10 01:02:33,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 22.21875) internal successors, (711), 32 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:33,837 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:33,837 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:33,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-10 01:02:34,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:34,038 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:34,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:34,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1792819623, now seen corresponding path program 1 times [2025-01-10 01:02:34,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:34,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505390308] [2025-01-10 01:02:34,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:34,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:34,051 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-10 01:02:34,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-10 01:02:34,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:34,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-01-10 01:02:34,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:34,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505390308] [2025-01-10 01:02:34,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505390308] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:34,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386312281] [2025-01-10 01:02:34,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:34,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:34,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:34,638 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) [2025-01-10 01:02:34,640 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 [2025-01-10 01:02:34,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-10 01:02:34,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-10 01:02:34,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:34,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:34,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-01-10 01:02:34,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:34,809 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 [2025-01-10 01:02:34,814 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 [2025-01-10 01:02:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:02:34,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 01:02:34,889 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:34,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-01-10 01:02:34,938 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-10 01:02:34,939 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 14 treesize of output 13 [2025-01-10 01:02:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:35,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386312281] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:35,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-10 01:02:35,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 24 [2025-01-10 01:02:35,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977062554] [2025-01-10 01:02:35,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:02:35,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 01:02:35,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:35,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 01:02:35,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2025-01-10 01:02:36,006 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2025-01-10 01:02:36,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 79 transitions, 404 flow. Second operand has 11 states, 11 states have (on average 29.272727272727273) internal successors, (322), 11 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:36,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:36,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2025-01-10 01:02:36,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:36,768 INFO L124 PetriNetUnfolderBase]: 3512/6029 cut-off events. [2025-01-10 01:02:36,768 INFO L125 PetriNetUnfolderBase]: For 8676/8941 co-relation queries the response was YES. [2025-01-10 01:02:36,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16058 conditions, 6029 events. 3512/6029 cut-off events. For 8676/8941 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 39933 event pairs, 1805 based on Foata normal form. 0/5747 useless extension candidates. Maximal degree in co-relation 15891. Up to 2958 conditions per place. [2025-01-10 01:02:36,800 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 78 selfloop transitions, 6 changer transitions 0/97 dead transitions. [2025-01-10 01:02:36,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 97 transitions, 665 flow [2025-01-10 01:02:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:02:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:02:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 207 transitions. [2025-01-10 01:02:36,802 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2025-01-10 01:02:36,802 INFO L175 Difference]: Start difference. First operand has 84 places, 79 transitions, 404 flow. Second operand 6 states and 207 transitions. [2025-01-10 01:02:36,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 97 transitions, 665 flow [2025-01-10 01:02:36,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 97 transitions, 646 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-01-10 01:02:36,809 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 418 flow [2025-01-10 01:02:36,809 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2025-01-10 01:02:36,809 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 28 predicate places. [2025-01-10 01:02:36,809 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 418 flow [2025-01-10 01:02:36,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.272727272727273) internal successors, (322), 11 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:36,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:36,810 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:36,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-10 01:02:37,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:37,014 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:37,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:37,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1616661505, now seen corresponding path program 1 times [2025-01-10 01:02:37,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:37,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850844260] [2025-01-10 01:02:37,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:37,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:37,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-10 01:02:37,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-10 01:02:37,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:37,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:37,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:37,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850844260] [2025-01-10 01:02:37,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850844260] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:37,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127691133] [2025-01-10 01:02:37,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:37,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:37,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:37,491 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) [2025-01-10 01:02:37,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-10 01:02:37,583 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-10 01:02:37,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-10 01:02:37,626 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:37,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:37,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-01-10 01:02:37,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:37,637 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 [2025-01-10 01:02:37,639 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 [2025-01-10 01:02:37,717 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-10 01:02:37,717 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 14 treesize of output 13 [2025-01-10 01:02:37,742 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:37,743 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 [2025-01-10 01:02:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:38,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:38,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127691133] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:38,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:38,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2025-01-10 01:02:38,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617747459] [2025-01-10 01:02:38,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:38,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-10 01:02:38,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:38,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-10 01:02:38,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2025-01-10 01:02:39,560 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2025-01-10 01:02:39,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 418 flow. Second operand has 29 states, 29 states have (on average 24.06896551724138) internal successors, (698), 29 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:39,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:39,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2025-01-10 01:02:39,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:40,574 INFO L124 PetriNetUnfolderBase]: 2889/5400 cut-off events. [2025-01-10 01:02:40,574 INFO L125 PetriNetUnfolderBase]: For 8013/8313 co-relation queries the response was YES. [2025-01-10 01:02:40,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15266 conditions, 5400 events. 2889/5400 cut-off events. For 8013/8313 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 37408 event pairs, 626 based on Foata normal form. 258/5544 useless extension candidates. Maximal degree in co-relation 15096. Up to 1299 conditions per place. [2025-01-10 01:02:40,606 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 117 selfloop transitions, 21 changer transitions 0/153 dead transitions. [2025-01-10 01:02:40,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 153 transitions, 992 flow [2025-01-10 01:02:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-10 01:02:40,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-01-10 01:02:40,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 499 transitions. [2025-01-10 01:02:40,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4892156862745098 [2025-01-10 01:02:40,609 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 418 flow. Second operand 17 states and 499 transitions. [2025-01-10 01:02:40,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 153 transitions, 992 flow [2025-01-10 01:02:40,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 153 transitions, 976 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:02:40,624 INFO L231 Difference]: Finished difference. Result has 103 places, 81 transitions, 472 flow [2025-01-10 01:02:40,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=472, PETRI_PLACES=103, PETRI_TRANSITIONS=81} [2025-01-10 01:02:40,625 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 43 predicate places. [2025-01-10 01:02:40,625 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 81 transitions, 472 flow [2025-01-10 01:02:40,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 24.06896551724138) internal successors, (698), 29 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:40,625 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:40,625 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:40,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-10 01:02:40,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-01-10 01:02:40,826 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:40,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:40,827 INFO L85 PathProgramCache]: Analyzing trace with hash -257165733, now seen corresponding path program 1 times [2025-01-10 01:02:40,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:40,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604622715] [2025-01-10 01:02:40,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:40,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:40,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-10 01:02:40,848 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-10 01:02:40,848 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:40,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-10 01:02:41,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:41,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604622715] [2025-01-10 01:02:41,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604622715] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:41,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299784975] [2025-01-10 01:02:41,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:41,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:41,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:41,084 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) [2025-01-10 01:02:41,085 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 [2025-01-10 01:02:41,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-10 01:02:41,232 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-10 01:02:41,232 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:41,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:41,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-10 01:02:41,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:41,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:41,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-01-10 01:02:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:41,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299784975] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:41,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:41,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2025-01-10 01:02:41,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622762060] [2025-01-10 01:02:41,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:41,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-10 01:02:41,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:41,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-10 01:02:41,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2025-01-10 01:02:41,986 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:02:41,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 81 transitions, 472 flow. Second operand has 21 states, 21 states have (on average 30.61904761904762) internal successors, (643), 21 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:41,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:41,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:02:41,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:42,976 INFO L124 PetriNetUnfolderBase]: 4094/7778 cut-off events. [2025-01-10 01:02:42,976 INFO L125 PetriNetUnfolderBase]: For 13684/14110 co-relation queries the response was YES. [2025-01-10 01:02:42,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22453 conditions, 7778 events. 4094/7778 cut-off events. For 13684/14110 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 59116 event pairs, 1805 based on Foata normal form. 408/8035 useless extension candidates. Maximal degree in co-relation 22267. Up to 3234 conditions per place. [2025-01-10 01:02:43,010 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 85 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2025-01-10 01:02:43,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 119 transitions, 904 flow [2025-01-10 01:02:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:02:43,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:02:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 362 transitions. [2025-01-10 01:02:43,012 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2025-01-10 01:02:43,012 INFO L175 Difference]: Start difference. First operand has 103 places, 81 transitions, 472 flow. Second operand 10 states and 362 transitions. [2025-01-10 01:02:43,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 119 transitions, 904 flow [2025-01-10 01:02:43,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 119 transitions, 878 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-01-10 01:02:43,027 INFO L231 Difference]: Finished difference. Result has 109 places, 83 transitions, 520 flow [2025-01-10 01:02:43,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=520, PETRI_PLACES=109, PETRI_TRANSITIONS=83} [2025-01-10 01:02:43,028 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 49 predicate places. [2025-01-10 01:02:43,028 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 83 transitions, 520 flow [2025-01-10 01:02:43,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.61904761904762) internal successors, (643), 21 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:43,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:43,029 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:43,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-10 01:02:43,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-10 01:02:43,229 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:43,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:43,230 INFO L85 PathProgramCache]: Analyzing trace with hash 871195909, now seen corresponding path program 1 times [2025-01-10 01:02:43,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:43,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136297831] [2025-01-10 01:02:43,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:43,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:43,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-10 01:02:43,257 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-10 01:02:43,257 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:43,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:43,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:43,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136297831] [2025-01-10 01:02:43,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136297831] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:43,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164332159] [2025-01-10 01:02:43,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:43,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:43,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:43,588 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) [2025-01-10 01:02:43,589 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 [2025-01-10 01:02:43,697 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-10 01:02:43,743 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-10 01:02:43,743 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:43,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:43,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-01-10 01:02:43,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:43,762 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 [2025-01-10 01:02:43,765 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 [2025-01-10 01:02:43,830 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:02:43,830 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 [2025-01-10 01:02:43,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 01:02:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:44,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:44,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164332159] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:44,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:44,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2025-01-10 01:02:44,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485392310] [2025-01-10 01:02:44,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:44,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-10 01:02:44,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:44,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-10 01:02:44,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2025-01-10 01:02:45,093 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2025-01-10 01:02:45,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 83 transitions, 520 flow. Second operand has 28 states, 28 states have (on average 23.464285714285715) internal successors, (657), 28 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:45,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:45,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2025-01-10 01:02:45,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:46,786 INFO L124 PetriNetUnfolderBase]: 8185/14215 cut-off events. [2025-01-10 01:02:46,786 INFO L125 PetriNetUnfolderBase]: For 27525/28333 co-relation queries the response was YES. [2025-01-10 01:02:46,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43349 conditions, 14215 events. 8185/14215 cut-off events. For 27525/28333 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 106733 event pairs, 1615 based on Foata normal form. 633/14661 useless extension candidates. Maximal degree in co-relation 43146. Up to 2775 conditions per place. [2025-01-10 01:02:46,869 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 132 selfloop transitions, 22 changer transitions 0/167 dead transitions. [2025-01-10 01:02:46,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 1266 flow [2025-01-10 01:02:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-10 01:02:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-01-10 01:02:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 478 transitions. [2025-01-10 01:02:46,871 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46862745098039216 [2025-01-10 01:02:46,871 INFO L175 Difference]: Start difference. First operand has 109 places, 83 transitions, 520 flow. Second operand 17 states and 478 transitions. [2025-01-10 01:02:46,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 1266 flow [2025-01-10 01:02:46,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 167 transitions, 1235 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:02:46,904 INFO L231 Difference]: Finished difference. Result has 123 places, 85 transitions, 564 flow [2025-01-10 01:02:46,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=564, PETRI_PLACES=123, PETRI_TRANSITIONS=85} [2025-01-10 01:02:46,905 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 63 predicate places. [2025-01-10 01:02:46,905 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 85 transitions, 564 flow [2025-01-10 01:02:46,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 23.464285714285715) internal successors, (657), 28 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:46,905 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:46,905 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:46,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-10 01:02:47,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-10 01:02:47,106 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:47,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1971862176, now seen corresponding path program 1 times [2025-01-10 01:02:47,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:47,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861312854] [2025-01-10 01:02:47,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:47,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:47,116 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-01-10 01:02:47,130 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-01-10 01:02:47,130 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:47,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-01-10 01:02:47,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:47,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861312854] [2025-01-10 01:02:47,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861312854] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:47,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266926306] [2025-01-10 01:02:47,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:47,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:47,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:47,712 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) [2025-01-10 01:02:47,714 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 [2025-01-10 01:02:47,828 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-01-10 01:02:47,879 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-01-10 01:02:47,879 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:47,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:47,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-01-10 01:02:47,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:47,890 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 [2025-01-10 01:02:47,945 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-10 01:02:47,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-01-10 01:02:48,029 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2025-01-10 01:02:48,030 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 17 treesize of output 22 [2025-01-10 01:02:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:48,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:48,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266926306] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:48,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:48,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2025-01-10 01:02:48,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655742992] [2025-01-10 01:02:48,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:48,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-01-10 01:02:48,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:48,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-01-10 01:02:48,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2025-01-10 01:02:49,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2025-01-10 01:02:49,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 85 transitions, 564 flow. Second operand has 31 states, 31 states have (on average 23.483870967741936) internal successors, (728), 31 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:49,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:49,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2025-01-10 01:02:49,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:52,717 INFO L124 PetriNetUnfolderBase]: 12632/21568 cut-off events. [2025-01-10 01:02:52,717 INFO L125 PetriNetUnfolderBase]: For 56008/57643 co-relation queries the response was YES. [2025-01-10 01:02:52,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70082 conditions, 21568 events. 12632/21568 cut-off events. For 56008/57643 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 169114 event pairs, 2903 based on Foata normal form. 966/22431 useless extension candidates. Maximal degree in co-relation 69859. Up to 4940 conditions per place. [2025-01-10 01:02:52,930 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 143 selfloop transitions, 28 changer transitions 0/185 dead transitions. [2025-01-10 01:02:52,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 185 transitions, 1573 flow [2025-01-10 01:02:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-10 01:02:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-01-10 01:02:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 573 transitions. [2025-01-10 01:02:52,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2025-01-10 01:02:52,932 INFO L175 Difference]: Start difference. First operand has 123 places, 85 transitions, 564 flow. Second operand 21 states and 573 transitions. [2025-01-10 01:02:52,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 185 transitions, 1573 flow [2025-01-10 01:02:52,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 185 transitions, 1479 flow, removed 12 selfloop flow, removed 14 redundant places. [2025-01-10 01:02:52,998 INFO L231 Difference]: Finished difference. Result has 134 places, 90 transitions, 637 flow [2025-01-10 01:02:52,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=637, PETRI_PLACES=134, PETRI_TRANSITIONS=90} [2025-01-10 01:02:52,999 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2025-01-10 01:02:52,999 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 90 transitions, 637 flow [2025-01-10 01:02:52,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 23.483870967741936) internal successors, (728), 31 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:53,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:53,000 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:53,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-10 01:02:53,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:53,202 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:53,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:53,202 INFO L85 PathProgramCache]: Analyzing trace with hash 107947680, now seen corresponding path program 1 times [2025-01-10 01:02:53,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:53,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080834711] [2025-01-10 01:02:53,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:53,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:53,212 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-10 01:02:53,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-10 01:02:53,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:53,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-10 01:02:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080834711] [2025-01-10 01:02:53,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080834711] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902313241] [2025-01-10 01:02:53,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:53,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:53,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:53,495 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) [2025-01-10 01:02:53,497 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 [2025-01-10 01:02:53,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-10 01:02:53,661 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-10 01:02:53,661 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:53,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:53,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-10 01:02:53,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:53,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:53,936 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 24 treesize of output 20 [2025-01-10 01:02:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:54,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902313241] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:54,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:54,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2025-01-10 01:02:54,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633484905] [2025-01-10 01:02:54,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:54,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-10 01:02:54,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:54,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-10 01:02:54,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2025-01-10 01:02:55,030 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:02:55,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 90 transitions, 637 flow. Second operand has 28 states, 28 states have (on average 30.0) internal successors, (840), 28 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:55,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:02:55,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:02:55,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:02:58,132 INFO L124 PetriNetUnfolderBase]: 10983/20813 cut-off events. [2025-01-10 01:02:58,132 INFO L125 PetriNetUnfolderBase]: For 61839/63014 co-relation queries the response was YES. [2025-01-10 01:02:58,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70734 conditions, 20813 events. 10983/20813 cut-off events. For 61839/63014 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 179005 event pairs, 2584 based on Foata normal form. 957/21374 useless extension candidates. Maximal degree in co-relation 70618. Up to 4518 conditions per place. [2025-01-10 01:02:58,311 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 162 selfloop transitions, 23 changer transitions 0/202 dead transitions. [2025-01-10 01:02:58,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 202 transitions, 1720 flow [2025-01-10 01:02:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:02:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:02:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 496 transitions. [2025-01-10 01:02:58,314 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6358974358974359 [2025-01-10 01:02:58,314 INFO L175 Difference]: Start difference. First operand has 134 places, 90 transitions, 637 flow. Second operand 13 states and 496 transitions. [2025-01-10 01:02:58,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 202 transitions, 1720 flow [2025-01-10 01:02:58,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 202 transitions, 1611 flow, removed 19 selfloop flow, removed 11 redundant places. [2025-01-10 01:02:58,411 INFO L231 Difference]: Finished difference. Result has 138 places, 92 transitions, 666 flow [2025-01-10 01:02:58,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=666, PETRI_PLACES=138, PETRI_TRANSITIONS=92} [2025-01-10 01:02:58,411 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 78 predicate places. [2025-01-10 01:02:58,411 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 92 transitions, 666 flow [2025-01-10 01:02:58,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 30.0) internal successors, (840), 28 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:02:58,412 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:02:58,412 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:02:58,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-10 01:02:58,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:58,613 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:02:58,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:02:58,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1390153477, now seen corresponding path program 1 times [2025-01-10 01:02:58,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:02:58,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002874893] [2025-01-10 01:02:58,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:58,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:02:58,623 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-01-10 01:02:58,640 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-01-10 01:02:58,640 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:58,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-01-10 01:02:58,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:02:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002874893] [2025-01-10 01:02:58,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002874893] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:02:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579683862] [2025-01-10 01:02:58,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:02:58,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:02:58,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:02:58,923 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) [2025-01-10 01:02:58,926 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 [2025-01-10 01:02:59,034 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-01-10 01:02:59,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-01-10 01:02:59,076 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:02:59,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:02:59,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-10 01:02:59,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:02:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:59,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:02:59,338 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 24 treesize of output 20 [2025-01-10 01:02:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:02:59,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579683862] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:02:59,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:02:59,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2025-01-10 01:02:59,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287187894] [2025-01-10 01:02:59,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:02:59,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-10 01:02:59,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:02:59,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-10 01:02:59,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2025-01-10 01:03:00,435 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-01-10 01:03:00,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 92 transitions, 666 flow. Second operand has 28 states, 28 states have (on average 30.214285714285715) internal successors, (846), 28 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:03:00,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:00,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-01-10 01:03:00,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:03,663 INFO L124 PetriNetUnfolderBase]: 12849/24473 cut-off events. [2025-01-10 01:03:03,663 INFO L125 PetriNetUnfolderBase]: For 78146/79607 co-relation queries the response was YES. [2025-01-10 01:03:03,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84539 conditions, 24473 events. 12849/24473 cut-off events. For 78146/79607 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 215385 event pairs, 3452 based on Foata normal form. 1143/25339 useless extension candidates. Maximal degree in co-relation 84418. Up to 5988 conditions per place. [2025-01-10 01:03:03,924 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 158 selfloop transitions, 23 changer transitions 0/198 dead transitions. [2025-01-10 01:03:03,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 198 transitions, 1796 flow [2025-01-10 01:03:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 01:03:03,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 01:03:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 486 transitions. [2025-01-10 01:03:03,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2025-01-10 01:03:03,926 INFO L175 Difference]: Start difference. First operand has 138 places, 92 transitions, 666 flow. Second operand 13 states and 486 transitions. [2025-01-10 01:03:03,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 198 transitions, 1796 flow [2025-01-10 01:03:04,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 1727 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-01-10 01:03:04,075 INFO L231 Difference]: Finished difference. Result has 144 places, 93 transitions, 695 flow [2025-01-10 01:03:04,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=695, PETRI_PLACES=144, PETRI_TRANSITIONS=93} [2025-01-10 01:03:04,075 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 84 predicate places. [2025-01-10 01:03:04,075 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 93 transitions, 695 flow [2025-01-10 01:03:04,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 30.214285714285715) internal successors, (846), 28 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:03:04,076 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:04,076 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:03:04,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-10 01:03:04,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:04,277 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:03:04,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1796518886, now seen corresponding path program 2 times [2025-01-10 01:03:04,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:04,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215785346] [2025-01-10 01:03:04,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:03:04,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:04,290 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-10 01:03:04,318 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-10 01:03:04,318 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:03:04,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-01-10 01:03:05,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:05,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215785346] [2025-01-10 01:03:05,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215785346] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:03:05,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961368550] [2025-01-10 01:03:05,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:03:05,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:05,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:03:05,265 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) [2025-01-10 01:03:05,267 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 [2025-01-10 01:03:05,373 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-10 01:03:05,420 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-10 01:03:05,420 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:03:05,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:05,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-01-10 01:03:05,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:03:05,428 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 [2025-01-10 01:03:05,431 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 [2025-01-10 01:03:05,495 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-01-10 01:03:05,495 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 [2025-01-10 01:03:05,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 01:03:05,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:03:05,746 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-10 01:03:05,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2025-01-10 01:03:05,755 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 01:03:05,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2025-01-10 01:03:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:03:05,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:03:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 01:03:06,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961368550] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:03:06,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:03:06,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 35 [2025-01-10 01:03:06,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946976505] [2025-01-10 01:03:06,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:03:06,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-01-10 01:03:06,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:06,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-01-10 01:03:06,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2025-01-10 01:03:08,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2025-01-10 01:03:08,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 93 transitions, 695 flow. Second operand has 37 states, 37 states have (on average 22.45945945945946) internal successors, (831), 37 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:03:08,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:08,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2025-01-10 01:03:08,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:15,527 INFO L124 PetriNetUnfolderBase]: 35878/54925 cut-off events. [2025-01-10 01:03:15,527 INFO L125 PetriNetUnfolderBase]: For 209761/213539 co-relation queries the response was YES. [2025-01-10 01:03:16,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206385 conditions, 54925 events. 35878/54925 cut-off events. For 209761/213539 co-relation queries the response was YES. Maximal size of possible extension queue 1294. Compared 413919 event pairs, 2574 based on Foata normal form. 1044/52744 useless extension candidates. Maximal degree in co-relation 206261. Up to 8285 conditions per place. [2025-01-10 01:03:16,221 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 263 selfloop transitions, 21 changer transitions 0/295 dead transitions. [2025-01-10 01:03:16,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 295 transitions, 2733 flow [2025-01-10 01:03:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-10 01:03:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-01-10 01:03:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 494 transitions. [2025-01-10 01:03:16,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2025-01-10 01:03:16,223 INFO L175 Difference]: Start difference. First operand has 144 places, 93 transitions, 695 flow. Second operand 16 states and 494 transitions. [2025-01-10 01:03:16,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 295 transitions, 2733 flow [2025-01-10 01:03:16,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 295 transitions, 2607 flow, removed 0 selfloop flow, removed 15 redundant places. [2025-01-10 01:03:16,556 INFO L231 Difference]: Finished difference. Result has 144 places, 94 transitions, 687 flow [2025-01-10 01:03:16,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=687, PETRI_PLACES=144, PETRI_TRANSITIONS=94} [2025-01-10 01:03:16,557 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 84 predicate places. [2025-01-10 01:03:16,557 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 94 transitions, 687 flow [2025-01-10 01:03:16,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 22.45945945945946) internal successors, (831), 37 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:03:16,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:16,557 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:03:16,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-10 01:03:16,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:16,758 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:03:16,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:16,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1720000872, now seen corresponding path program 1 times [2025-01-10 01:03:16,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:16,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080227183] [2025-01-10 01:03:16,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:03:16,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:16,769 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-01-10 01:03:16,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-01-10 01:03:16,777 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:03:16,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-01-10 01:03:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:16,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080227183] [2025-01-10 01:03:16,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080227183] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:03:16,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:03:16,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:03:16,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573501702] [2025-01-10 01:03:16,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:03:16,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:03:16,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:16,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:03:16,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:03:16,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-01-10 01:03:16,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 94 transitions, 687 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:03:16,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:16,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-01-10 01:03:16,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:20,491 INFO L124 PetriNetUnfolderBase]: 14188/26759 cut-off events. [2025-01-10 01:03:20,492 INFO L125 PetriNetUnfolderBase]: For 91499/93727 co-relation queries the response was YES. [2025-01-10 01:03:20,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95121 conditions, 26759 events. 14188/26759 cut-off events. For 91499/93727 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 237024 event pairs, 10966 based on Foata normal form. 36/26231 useless extension candidates. Maximal degree in co-relation 95004. Up to 17850 conditions per place. [2025-01-10 01:03:20,790 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 94 selfloop transitions, 2 changer transitions 1/115 dead transitions. [2025-01-10 01:03:20,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 115 transitions, 1039 flow [2025-01-10 01:03:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:03:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:03:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2025-01-10 01:03:20,791 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2025-01-10 01:03:20,791 INFO L175 Difference]: Start difference. First operand has 144 places, 94 transitions, 687 flow. Second operand 3 states and 129 transitions. [2025-01-10 01:03:20,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 115 transitions, 1039 flow [2025-01-10 01:03:21,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 115 transitions, 995 flow, removed 0 selfloop flow, removed 12 redundant places. [2025-01-10 01:03:21,024 INFO L231 Difference]: Finished difference. Result has 135 places, 94 transitions, 660 flow [2025-01-10 01:03:21,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=660, PETRI_PLACES=135, PETRI_TRANSITIONS=94} [2025-01-10 01:03:21,025 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2025-01-10 01:03:21,025 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 94 transitions, 660 flow [2025-01-10 01:03:21,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:03:21,025 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:21,025 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:03:21,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-01-10 01:03:21,025 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-01-10 01:03:21,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:21,026 INFO L85 PathProgramCache]: Analyzing trace with hash -142488598, now seen corresponding path program 2 times [2025-01-10 01:03:21,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:21,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945276466] [2025-01-10 01:03:21,026 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:03:21,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:21,036 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-01-10 01:03:21,042 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 51 statements. [2025-01-10 01:03:21,042 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:03:21,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2025-01-10 01:03:21,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:21,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945276466] [2025-01-10 01:03:21,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945276466] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:03:21,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999672236] [2025-01-10 01:03:21,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:03:21,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:21,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:03:21,201 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) [2025-01-10 01:03:21,203 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 [2025-01-10 01:03:21,309 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-01-10 01:03:21,325 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 51 statements. [2025-01-10 01:03:21,325 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:03:21,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:21,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-01-10 01:03:21,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:03:21,334 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 [2025-01-10 01:03:21,338 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 [2025-01-10 01:03:21,396 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-10 01:03:21,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-01-10 01:03:21,418 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-01-10 01:03:21,418 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 17 treesize of output 21 [2025-01-10 01:03:21,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:03:21,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 01:03:21,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2025-01-10 01:03:21,564 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-01-10 01:03:21,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2025-01-10 01:03:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2025-01-10 01:03:22,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:03:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2025-01-10 01:03:23,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999672236] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:03:23,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:03:23,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2025-01-10 01:03:23,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691031564] [2025-01-10 01:03:23,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:03:23,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:03:23,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:23,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:03:23,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:03:24,565 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2025-01-10 01:03:24,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 94 transitions, 660 flow. Second operand has 14 states, 14 states have (on average 24.642857142857142) internal successors, (345), 14 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:03:24,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:24,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2025-01-10 01:03:24,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:29,056 INFO L124 PetriNetUnfolderBase]: 24976/37063 cut-off events. [2025-01-10 01:03:29,056 INFO L125 PetriNetUnfolderBase]: For 142629/145697 co-relation queries the response was YES. [2025-01-10 01:03:29,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140523 conditions, 37063 events. 24976/37063 cut-off events. For 142629/145697 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 261272 event pairs, 10850 based on Foata normal form. 732/37159 useless extension candidates. Maximal degree in co-relation 140408. Up to 17562 conditions per place.