./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:54:24,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:54:24,515 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:54:24,520 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:54:24,520 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:54:24,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:54:24,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:54:24,545 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:54:24,545 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:54:24,545 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:54:24,546 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:54:24,546 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:54:24,546 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:54:24,546 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:54:24,547 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:54:24,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:54:24,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:54:24,547 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 -> bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa [2025-02-06 12:54:24,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:54:24,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:54:24,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:54:24,834 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:54:24,834 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:54:24,835 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2025-02-06 12:54:26,117 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7666487a1/dd26197b279646268133d28b681aa3e8/FLAGd71913d0c [2025-02-06 12:54:26,445 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:54:26,447 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2025-02-06 12:54:26,463 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7666487a1/dd26197b279646268133d28b681aa3e8/FLAGd71913d0c [2025-02-06 12:54:26,478 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7666487a1/dd26197b279646268133d28b681aa3e8 [2025-02-06 12:54:26,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:54:26,480 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:54:26,482 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:54:26,482 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:54:26,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:54:26,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:54:26" (1/1) ... [2025-02-06 12:54:26,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190733e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:26, skipping insertion in model container [2025-02-06 12:54:26,486 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:54:26" (1/1) ... [2025-02-06 12:54:26,515 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:54:26,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:54:26,983 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:54:27,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:54:27,076 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:54:27,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27 WrapperNode [2025-02-06 12:54:27,077 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:54:27,078 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:54:27,078 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:54:27,079 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:54:27,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,106 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,121 INFO L138 Inliner]: procedures = 372, calls = 43, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 130 [2025-02-06 12:54:27,122 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:54:27,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:54:27,123 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:54:27,123 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:54:27,129 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,135 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,157 INFO L175 MemorySlicer]: Split 33 memory accesses to 3 slices as follows [5, 14, 14]. 42 percent of accesses are in the largest equivalence class. The 15 initializations are split as follows [5, 0, 10]. The 11 writes are split as follows [0, 10, 1]. [2025-02-06 12:54:27,157 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,157 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,165 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,171 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:54:27,175 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:54:27,176 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:54:27,176 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:54:27,176 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (1/1) ... [2025-02-06 12:54:27,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:54:27,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:54:27,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 12:54:27,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-06 12:54:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-02-06 12:54:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-02-06 12:54:27,232 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-02-06 12:54:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 12:54:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 12:54:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 12:54:27,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:54:27,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:54:27,234 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:54:27,452 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:54:27,454 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:54:27,728 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:54:27,729 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:54:27,868 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:54:27,869 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:54:27,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:54:27 BoogieIcfgContainer [2025-02-06 12:54:27,869 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:54:27,871 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:54:27,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:54:27,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:54:27,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:54:26" (1/3) ... [2025-02-06 12:54:27,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa458ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:54:27, skipping insertion in model container [2025-02-06 12:54:27,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:54:27" (2/3) ... [2025-02-06 12:54:27,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa458ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:54:27, skipping insertion in model container [2025-02-06 12:54:27,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:54:27" (3/3) ... [2025-02-06 12:54:27,876 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_09-arraylist.i [2025-02-06 12:54:27,886 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:54:27,887 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_09-arraylist.i that has 2 procedures, 71 locations, 1 initial locations, 1 loop locations, and 37 error locations. [2025-02-06 12:54:27,887 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:54:27,948 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 12:54:27,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 71 transitions, 146 flow [2025-02-06 12:54:28,039 INFO L124 PetriNetUnfolderBase]: 1/70 cut-off events. [2025-02-06 12:54:28,041 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:54:28,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 70 events. 1/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 283 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2025-02-06 12:54:28,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 71 transitions, 146 flow [2025-02-06 12:54:28,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 143 flow [2025-02-06 12:54:28,054 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:54:28,062 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;@768c69f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:54:28,062 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2025-02-06 12:54:28,065 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:54:28,065 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2025-02-06 12:54:28,065 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:54:28,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:28,066 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:54:28,066 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:28,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:28,070 INFO L85 PathProgramCache]: Analyzing trace with hash 411029, now seen corresponding path program 1 times [2025-02-06 12:54:28,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:28,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361997558] [2025-02-06 12:54:28,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:28,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:28,147 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:54:28,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:54:28,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:28,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:28,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:28,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361997558] [2025-02-06 12:54:28,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361997558] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:28,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:28,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:54:28,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128418029] [2025-02-06 12:54:28,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:28,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:54:28,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:28,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:54:28,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:54:28,397 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 71 [2025-02-06 12:54:28,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:28,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:28,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 71 [2025-02-06 12:54:28,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:28,532 INFO L124 PetriNetUnfolderBase]: 64/261 cut-off events. [2025-02-06 12:54:28,532 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:54:28,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 261 events. 64/261 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1343 event pairs, 63 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 376. Up to 151 conditions per place. [2025-02-06 12:54:28,536 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 24 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2025-02-06 12:54:28,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 191 flow [2025-02-06 12:54:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:54:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:54:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2025-02-06 12:54:28,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6995305164319249 [2025-02-06 12:54:28,550 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 143 flow. Second operand 3 states and 149 transitions. [2025-02-06 12:54:28,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 191 flow [2025-02-06 12:54:28,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:54:28,557 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 142 flow [2025-02-06 12:54:28,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2025-02-06 12:54:28,562 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2025-02-06 12:54:28,563 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 142 flow [2025-02-06 12:54:28,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:28,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:28,564 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:54:28,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 12:54:28,564 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:28,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash 411030, now seen corresponding path program 1 times [2025-02-06 12:54:28,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:28,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960721006] [2025-02-06 12:54:28,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:28,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:28,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:54:28,583 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:54:28,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:28,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:28,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:28,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960721006] [2025-02-06 12:54:28,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960721006] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:28,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:28,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:54:28,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6337786] [2025-02-06 12:54:28,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:28,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:54:28,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:28,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:54:28,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:54:28,741 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 71 [2025-02-06 12:54:28,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:28,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:28,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 71 [2025-02-06 12:54:28,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:28,810 INFO L124 PetriNetUnfolderBase]: 64/257 cut-off events. [2025-02-06 12:54:28,810 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:54:28,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 257 events. 64/257 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1307 event pairs, 63 based on Foata normal form. 4/205 useless extension candidates. Maximal degree in co-relation 384. Up to 151 conditions per place. [2025-02-06 12:54:28,812 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 22 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2025-02-06 12:54:28,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 186 flow [2025-02-06 12:54:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:54:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:54:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2025-02-06 12:54:28,813 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7183098591549296 [2025-02-06 12:54:28,813 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 142 flow. Second operand 3 states and 153 transitions. [2025-02-06 12:54:28,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 186 flow [2025-02-06 12:54:28,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:54:28,814 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 134 flow [2025-02-06 12:54:28,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2025-02-06 12:54:28,815 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2025-02-06 12:54:28,815 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 134 flow [2025-02-06 12:54:28,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:28,815 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:28,815 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 12:54:28,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 12:54:28,816 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:28,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash 395010210, now seen corresponding path program 1 times [2025-02-06 12:54:28,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:28,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739925508] [2025-02-06 12:54:28,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:28,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:28,824 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 12:54:28,830 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 12:54:28,830 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:28,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:28,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:28,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739925508] [2025-02-06 12:54:28,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739925508] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:28,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:28,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:54:28,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145159684] [2025-02-06 12:54:28,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:28,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:54:28,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:28,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:54:28,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:54:29,126 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 71 [2025-02-06 12:54:29,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 38.833333333333336) internal successors, (233), 6 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:29,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:29,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 71 [2025-02-06 12:54:29,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:29,206 INFO L124 PetriNetUnfolderBase]: 73/279 cut-off events. [2025-02-06 12:54:29,206 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:54:29,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 279 events. 73/279 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1417 event pairs, 72 based on Foata normal form. 1/228 useless extension candidates. Maximal degree in co-relation 427. Up to 173 conditions per place. [2025-02-06 12:54:29,209 INFO L140 encePairwiseOnDemand]: 66/71 looper letters, 28 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2025-02-06 12:54:29,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 184 flow [2025-02-06 12:54:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:54:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:54:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2025-02-06 12:54:29,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6901408450704225 [2025-02-06 12:54:29,211 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 134 flow. Second operand 3 states and 147 transitions. [2025-02-06 12:54:29,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 184 flow [2025-02-06 12:54:29,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:54:29,213 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 120 flow [2025-02-06 12:54:29,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2025-02-06 12:54:29,214 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -11 predicate places. [2025-02-06 12:54:29,214 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 120 flow [2025-02-06 12:54:29,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.833333333333336) internal successors, (233), 6 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:29,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:29,215 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 12:54:29,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 12:54:29,215 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:29,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:29,216 INFO L85 PathProgramCache]: Analyzing trace with hash 395010211, now seen corresponding path program 1 times [2025-02-06 12:54:29,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:29,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823717577] [2025-02-06 12:54:29,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:29,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:29,228 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 12:54:29,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 12:54:29,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:29,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:29,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823717577] [2025-02-06 12:54:29,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823717577] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:29,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:29,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:54:29,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831278520] [2025-02-06 12:54:29,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:29,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:54:29,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:29,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:54:29,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:54:29,525 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 71 [2025-02-06 12:54:29,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:29,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:29,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 71 [2025-02-06 12:54:29,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:29,652 INFO L124 PetriNetUnfolderBase]: 64/265 cut-off events. [2025-02-06 12:54:29,653 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:54:29,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 265 events. 64/265 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1250 event pairs, 63 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 426. Up to 155 conditions per place. [2025-02-06 12:54:29,655 INFO L140 encePairwiseOnDemand]: 62/71 looper letters, 29 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2025-02-06 12:54:29,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 204 flow [2025-02-06 12:54:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:54:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:54:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 178 transitions. [2025-02-06 12:54:29,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6267605633802817 [2025-02-06 12:54:29,659 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 120 flow. Second operand 4 states and 178 transitions. [2025-02-06 12:54:29,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 204 flow [2025-02-06 12:54:29,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:54:29,663 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 167 flow [2025-02-06 12:54:29,663 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2025-02-06 12:54:29,664 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2025-02-06 12:54:29,665 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 167 flow [2025-02-06 12:54:29,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:29,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:29,665 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:29,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 12:54:29,666 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:29,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:29,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1398782427, now seen corresponding path program 1 times [2025-02-06 12:54:29,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:29,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906219649] [2025-02-06 12:54:29,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:29,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:29,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:54:29,690 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:54:29,691 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:29,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:29,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:29,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906219649] [2025-02-06 12:54:29,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906219649] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:29,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:29,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:54:29,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923731483] [2025-02-06 12:54:29,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:29,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 12:54:29,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:29,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 12:54:29,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-06 12:54:30,093 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 71 [2025-02-06 12:54:30,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 167 flow. Second operand has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:30,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:30,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 71 [2025-02-06 12:54:30,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:30,215 INFO L124 PetriNetUnfolderBase]: 64/261 cut-off events. [2025-02-06 12:54:30,216 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:54:30,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 261 events. 64/261 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1222 event pairs, 63 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 444. Up to 148 conditions per place. [2025-02-06 12:54:30,217 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 23 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2025-02-06 12:54:30,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 231 flow [2025-02-06 12:54:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:54:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:54:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 283 transitions. [2025-02-06 12:54:30,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5694164989939637 [2025-02-06 12:54:30,219 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 167 flow. Second operand 7 states and 283 transitions. [2025-02-06 12:54:30,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 231 flow [2025-02-06 12:54:30,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:54:30,221 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 183 flow [2025-02-06 12:54:30,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=183, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2025-02-06 12:54:30,221 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -4 predicate places. [2025-02-06 12:54:30,222 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 183 flow [2025-02-06 12:54:30,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:30,222 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:30,222 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:30,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 12:54:30,222 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:30,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:30,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1398782426, now seen corresponding path program 1 times [2025-02-06 12:54:30,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:30,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439218195] [2025-02-06 12:54:30,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:30,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:30,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:54:30,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:54:30,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:30,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:30,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:30,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439218195] [2025-02-06 12:54:30,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439218195] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:30,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:30,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:54:30,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112100447] [2025-02-06 12:54:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:30,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 12:54:30,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:30,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 12:54:30,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-06 12:54:30,811 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2025-02-06 12:54:30,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 183 flow. Second operand has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:30,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:30,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2025-02-06 12:54:30,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:30,927 INFO L124 PetriNetUnfolderBase]: 64/257 cut-off events. [2025-02-06 12:54:30,927 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-02-06 12:54:30,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 257 events. 64/257 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1202 event pairs, 63 based on Foata normal form. 2/213 useless extension candidates. Maximal degree in co-relation 449. Up to 148 conditions per place. [2025-02-06 12:54:30,929 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 22 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2025-02-06 12:54:30,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 59 transitions, 245 flow [2025-02-06 12:54:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 12:54:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 12:54:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2025-02-06 12:54:30,930 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5251509054325956 [2025-02-06 12:54:30,930 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 183 flow. Second operand 7 states and 261 transitions. [2025-02-06 12:54:30,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 59 transitions, 245 flow [2025-02-06 12:54:30,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 59 transitions, 223 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 12:54:30,936 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 179 flow [2025-02-06 12:54:30,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=179, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2025-02-06 12:54:30,937 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2025-02-06 12:54:30,937 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 179 flow [2025-02-06 12:54:30,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:30,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:30,937 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:30,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 12:54:30,937 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:30,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash 94865657, now seen corresponding path program 1 times [2025-02-06 12:54:30,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:30,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584279760] [2025-02-06 12:54:30,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:30,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:30,956 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:54:30,968 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:54:30,970 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:30,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:31,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:31,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584279760] [2025-02-06 12:54:31,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584279760] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:31,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:31,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:54:31,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480721390] [2025-02-06 12:54:31,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:31,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:54:31,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:31,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:54:31,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:54:31,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 71 [2025-02-06 12:54:31,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:31,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:31,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 71 [2025-02-06 12:54:31,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:31,206 INFO L124 PetriNetUnfolderBase]: 64/255 cut-off events. [2025-02-06 12:54:31,206 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-02-06 12:54:31,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 255 events. 64/255 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1191 event pairs, 63 based on Foata normal form. 2/213 useless extension candidates. Maximal degree in co-relation 447. Up to 150 conditions per place. [2025-02-06 12:54:31,207 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 22 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2025-02-06 12:54:31,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 243 flow [2025-02-06 12:54:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:54:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:54:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2025-02-06 12:54:31,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6169014084507042 [2025-02-06 12:54:31,209 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 179 flow. Second operand 5 states and 219 transitions. [2025-02-06 12:54:31,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 243 flow [2025-02-06 12:54:31,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 221 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 12:54:31,210 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 177 flow [2025-02-06 12:54:31,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2025-02-06 12:54:31,211 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2025-02-06 12:54:31,211 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 177 flow [2025-02-06 12:54:31,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:31,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:31,211 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:31,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 12:54:31,212 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:31,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:31,212 INFO L85 PathProgramCache]: Analyzing trace with hash 94865658, now seen corresponding path program 1 times [2025-02-06 12:54:31,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:31,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920316619] [2025-02-06 12:54:31,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:31,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:31,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:54:31,227 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:54:31,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:31,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:31,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:31,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920316619] [2025-02-06 12:54:31,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920316619] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:54:31,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:54:31,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:54:31,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758534092] [2025-02-06 12:54:31,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:54:31,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:54:31,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:31,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:54:31,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:54:31,412 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 71 [2025-02-06 12:54:31,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:31,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:31,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 71 [2025-02-06 12:54:31,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:31,494 INFO L124 PetriNetUnfolderBase]: 64/253 cut-off events. [2025-02-06 12:54:31,494 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-02-06 12:54:31,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 253 events. 64/253 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1177 event pairs, 63 based on Foata normal form. 2/211 useless extension candidates. Maximal degree in co-relation 441. Up to 150 conditions per place. [2025-02-06 12:54:31,495 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 20 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2025-02-06 12:54:31,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 237 flow [2025-02-06 12:54:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:54:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:54:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2025-02-06 12:54:31,497 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6394366197183099 [2025-02-06 12:54:31,497 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 177 flow. Second operand 5 states and 227 transitions. [2025-02-06 12:54:31,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 237 flow [2025-02-06 12:54:31,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 215 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:54:31,498 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 175 flow [2025-02-06 12:54:31,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2025-02-06 12:54:31,498 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2025-02-06 12:54:31,498 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 175 flow [2025-02-06 12:54:31,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:31,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:31,499 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:31,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 12:54:31,499 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:31,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:31,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1696187006, now seen corresponding path program 1 times [2025-02-06 12:54:31,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:31,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378958804] [2025-02-06 12:54:31,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:31,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:31,511 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 12:54:31,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 12:54:31,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:31,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:31,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:31,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378958804] [2025-02-06 12:54:31,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378958804] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:54:31,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645813738] [2025-02-06 12:54:31,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:31,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:31,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:54:31,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:54:31,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 12:54:31,854 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 12:54:31,885 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 12:54:31,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:31,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:31,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 12:54:31,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:54:31,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:31,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:32,024 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 12:54:32,025 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 [2025-02-06 12:54:32,044 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:54:32,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:54:32,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:32,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:32,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:54:32,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:54:32,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2025-02-06 12:54:32,395 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:32,395 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 13 treesize of output 12 [2025-02-06 12:54:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:32,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645813738] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:54:32,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:54:32,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2025-02-06 12:54:32,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975185476] [2025-02-06 12:54:32,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:54:32,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 12:54:32,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:32,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 12:54:32,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-02-06 12:54:33,809 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2025-02-06 12:54:33,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 175 flow. Second operand has 18 states, 18 states have (on average 35.833333333333336) internal successors, (645), 18 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:33,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:33,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2025-02-06 12:54:33,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:34,142 INFO L124 PetriNetUnfolderBase]: 75/308 cut-off events. [2025-02-06 12:54:34,142 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-02-06 12:54:34,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 308 events. 75/308 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1442 event pairs, 72 based on Foata normal form. 7/267 useless extension candidates. Maximal degree in co-relation 564. Up to 170 conditions per place. [2025-02-06 12:54:34,144 INFO L140 encePairwiseOnDemand]: 62/71 looper letters, 38 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2025-02-06 12:54:34,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 383 flow [2025-02-06 12:54:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 12:54:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 12:54:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 367 transitions. [2025-02-06 12:54:34,146 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5743348982785602 [2025-02-06 12:54:34,146 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 175 flow. Second operand 9 states and 367 transitions. [2025-02-06 12:54:34,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 383 flow [2025-02-06 12:54:34,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 77 transitions, 329 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:54:34,148 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 257 flow [2025-02-06 12:54:34,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=257, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2025-02-06 12:54:34,148 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, -2 predicate places. [2025-02-06 12:54:34,149 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 257 flow [2025-02-06 12:54:34,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 35.833333333333336) internal successors, (645), 18 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:34,149 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:34,149 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:34,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 12:54:34,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:34,354 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:34,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1617620548, now seen corresponding path program 1 times [2025-02-06 12:54:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:34,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514809605] [2025-02-06 12:54:34,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:34,371 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 12:54:34,383 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 12:54:34,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:34,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:34,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:34,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514809605] [2025-02-06 12:54:34,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514809605] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:54:34,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430555796] [2025-02-06 12:54:34,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:54:34,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:34,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:54:34,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:54:34,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 12:54:34,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 12:54:34,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 12:54:34,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:54:34,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:34,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 12:54:34,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:54:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:34,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:54:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:34,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430555796] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:54:34,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:54:34,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-02-06 12:54:34,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175466269] [2025-02-06 12:54:34,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:54:34,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 12:54:34,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:34,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 12:54:34,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-02-06 12:54:34,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 71 [2025-02-06 12:54:34,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 257 flow. Second operand has 9 states, 9 states have (on average 49.77777777777778) internal successors, (448), 9 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:34,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:34,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 71 [2025-02-06 12:54:34,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:34,837 INFO L124 PetriNetUnfolderBase]: 64/294 cut-off events. [2025-02-06 12:54:34,837 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2025-02-06 12:54:34,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 294 events. 64/294 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1097 event pairs, 63 based on Foata normal form. 4/254 useless extension candidates. Maximal degree in co-relation 571. Up to 146 conditions per place. [2025-02-06 12:54:34,839 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 54 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2025-02-06 12:54:34,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 87 transitions, 477 flow [2025-02-06 12:54:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 12:54:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 12:54:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 426 transitions. [2025-02-06 12:54:34,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.75 [2025-02-06 12:54:34,841 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 257 flow. Second operand 8 states and 426 transitions. [2025-02-06 12:54:34,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 87 transitions, 477 flow [2025-02-06 12:54:34,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 457 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-02-06 12:54:34,843 INFO L231 Difference]: Finished difference. Result has 79 places, 66 transitions, 273 flow [2025-02-06 12:54:34,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=273, PETRI_PLACES=79, PETRI_TRANSITIONS=66} [2025-02-06 12:54:34,844 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 6 predicate places. [2025-02-06 12:54:34,844 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 273 flow [2025-02-06 12:54:34,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 49.77777777777778) internal successors, (448), 9 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:34,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:34,844 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2025-02-06 12:54:34,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 12:54:35,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:35,045 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:35,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:35,046 INFO L85 PathProgramCache]: Analyzing trace with hash 252159375, now seen corresponding path program 2 times [2025-02-06 12:54:35,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:35,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313429917] [2025-02-06 12:54:35,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:54:35,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:35,086 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-02-06 12:54:35,244 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 12:54:35,244 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:54:35,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:36,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:36,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313429917] [2025-02-06 12:54:36,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313429917] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:54:36,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546786715] [2025-02-06 12:54:36,774 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:54:36,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:36,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:54:36,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:54:36,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 12:54:36,896 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-02-06 12:54:36,983 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 12:54:36,983 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:54:36,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:36,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 69 conjuncts are in the unsatisfiable core [2025-02-06 12:54:36,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:54:37,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:37,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:37,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:37,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:37,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:37,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:37,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:37,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:37,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:37,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:37,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:37,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:37,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:37,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:37,501 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 12:54:37,501 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 [2025-02-06 12:54:37,513 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 12:54:37,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 12:54:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:54:37,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:54:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:37,684 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:54:37,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:54:37,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2025-02-06 12:54:37,926 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:37,926 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 13 treesize of output 12 [2025-02-06 12:54:38,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:54:38,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2025-02-06 12:54:38,156 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:38,156 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 13 treesize of output 12 [2025-02-06 12:54:38,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:54:38,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2025-02-06 12:54:38,430 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:38,430 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 13 treesize of output 12 [2025-02-06 12:54:38,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:54:38,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2025-02-06 12:54:38,695 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 12:54:38,696 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 13 treesize of output 12 [2025-02-06 12:54:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:38,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546786715] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:54:38,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:54:38,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 37 [2025-02-06 12:54:38,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076128209] [2025-02-06 12:54:38,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:54:38,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-02-06 12:54:38,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:38,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-02-06 12:54:38,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2025-02-06 12:54:45,505 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2025-02-06 12:54:45,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 273 flow. Second operand has 39 states, 39 states have (on average 36.46153846153846) internal successors, (1422), 39 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:45,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:45,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2025-02-06 12:54:45,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:46,686 INFO L124 PetriNetUnfolderBase]: 77/370 cut-off events. [2025-02-06 12:54:46,686 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2025-02-06 12:54:46,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 370 events. 77/370 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1454 event pairs, 72 based on Foata normal form. 6/328 useless extension candidates. Maximal degree in co-relation 789. Up to 172 conditions per place. [2025-02-06 12:54:46,688 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 74 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2025-02-06 12:54:46,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 121 transitions, 803 flow [2025-02-06 12:54:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 12:54:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 12:54:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 614 transitions. [2025-02-06 12:54:46,690 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5765258215962441 [2025-02-06 12:54:46,690 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 273 flow. Second operand 15 states and 614 transitions. [2025-02-06 12:54:46,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 121 transitions, 803 flow [2025-02-06 12:54:46,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 121 transitions, 787 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-02-06 12:54:46,693 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 537 flow [2025-02-06 12:54:46,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=537, PETRI_PLACES=100, PETRI_TRANSITIONS=83} [2025-02-06 12:54:46,694 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 27 predicate places. [2025-02-06 12:54:46,694 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 537 flow [2025-02-06 12:54:46,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 36.46153846153846) internal successors, (1422), 39 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:46,695 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:46,695 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:54:46,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 12:54:46,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:46,896 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:46,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash 612343208, now seen corresponding path program 2 times [2025-02-06 12:54:46,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:46,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420597862] [2025-02-06 12:54:46,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:54:46,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:46,928 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 67 statements into 2 equivalence classes. [2025-02-06 12:54:46,957 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 67 of 67 statements. [2025-02-06 12:54:46,957 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:54:46,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:47,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:47,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420597862] [2025-02-06 12:54:47,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420597862] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:54:47,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140213648] [2025-02-06 12:54:47,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:54:47,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:47,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:54:47,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:54:47,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 12:54:47,461 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 67 statements into 2 equivalence classes. [2025-02-06 12:54:47,577 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 67 of 67 statements. [2025-02-06 12:54:47,577 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:54:47,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:47,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:54:47,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:54:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:47,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:54:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:47,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140213648] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:54:47,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:54:47,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-02-06 12:54:47,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382063140] [2025-02-06 12:54:47,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:54:47,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 12:54:47,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:54:47,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 12:54:47,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-06 12:54:47,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 71 [2025-02-06 12:54:47,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 83 transitions, 537 flow. Second operand has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:47,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:54:47,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 71 [2025-02-06 12:54:47,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:54:48,014 INFO L124 PetriNetUnfolderBase]: 64/336 cut-off events. [2025-02-06 12:54:48,015 INFO L125 PetriNetUnfolderBase]: For 537/537 co-relation queries the response was YES. [2025-02-06 12:54:48,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 336 events. 64/336 cut-off events. For 537/537 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1106 event pairs, 63 based on Foata normal form. 4/296 useless extension candidates. Maximal degree in co-relation 790. Up to 146 conditions per place. [2025-02-06 12:54:48,020 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 79 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2025-02-06 12:54:48,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 116 transitions, 891 flow [2025-02-06 12:54:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 12:54:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 12:54:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 634 transitions. [2025-02-06 12:54:48,024 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.744131455399061 [2025-02-06 12:54:48,024 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 537 flow. Second operand 12 states and 634 transitions. [2025-02-06 12:54:48,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 116 transitions, 891 flow [2025-02-06 12:54:48,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 116 transitions, 835 flow, removed 22 selfloop flow, removed 6 redundant places. [2025-02-06 12:54:48,038 INFO L231 Difference]: Finished difference. Result has 106 places, 80 transitions, 462 flow [2025-02-06 12:54:48,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=462, PETRI_PLACES=106, PETRI_TRANSITIONS=80} [2025-02-06 12:54:48,040 INFO L279 CegarLoopForPetriNet]: 73 programPoint places, 33 predicate places. [2025-02-06 12:54:48,042 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 80 transitions, 462 flow [2025-02-06 12:54:48,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:54:48,043 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:54:48,043 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2025-02-06 12:54:48,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 12:54:48,246 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,SelfDestructingSolverStorable11 [2025-02-06 12:54:48,247 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2025-02-06 12:54:48,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:54:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1731551119, now seen corresponding path program 3 times [2025-02-06 12:54:48,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:54:48,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523402019] [2025-02-06 12:54:48,253 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:54:48,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:54:48,369 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 105 statements into 11 equivalence classes. [2025-02-06 12:54:49,740 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 105 of 105 statements. [2025-02-06 12:54:49,741 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-02-06 12:54:49,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:54:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 399 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:54:50,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:54:50,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523402019] [2025-02-06 12:54:50,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523402019] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:54:50,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693536822] [2025-02-06 12:54:50,518 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:54:50,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:54:50,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:54:50,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:54:50,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 12:54:50,760 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 105 statements into 11 equivalence classes.