./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.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/28-race_reach_92-evilcollapse_racing-deref.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 dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:59:17,989 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:59:18,041 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:59:18,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:59:18,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:59:18,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:59:18,069 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:59:18,069 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:59:18,069 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:59:18,070 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:59:18,070 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:59:18,070 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:59:18,071 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:59:18,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:59:18,071 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:59:18,071 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:59:18,072 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:59:18,073 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:59:18,073 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:59:18,073 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:59:18,073 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:59:18,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:59:18,073 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:59:18,073 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:59:18,074 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:59:18,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:59:18,074 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:59:18,074 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:59:18,074 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:59:18,074 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:59:18,074 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 -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2025-02-06 12:59:18,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:59:18,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:59:18,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:59:18,345 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:59:18,345 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:59:18,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-02-06 12:59:19,492 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c182cc49c/72913e92fd0d40fca3691d7988324940/FLAGf94c29bf2 [2025-02-06 12:59:19,748 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:59:19,749 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-02-06 12:59:19,763 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c182cc49c/72913e92fd0d40fca3691d7988324940/FLAGf94c29bf2 [2025-02-06 12:59:20,053 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c182cc49c/72913e92fd0d40fca3691d7988324940 [2025-02-06 12:59:20,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:59:20,057 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:59:20,059 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:20,059 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:59:20,062 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:59:20,063 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:20" (1/1) ... [2025-02-06 12:59:20,065 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1397687a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:20, skipping insertion in model container [2025-02-06 12:59:20,066 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:20" (1/1) ... [2025-02-06 12:59:20,107 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:59:20,379 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:20,379 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:20,379 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:20,379 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:20,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:20,428 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-02-06 12:59:20,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ceaea8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:20, skipping insertion in model container [2025-02-06 12:59:20,429 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:20,429 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-02-06 12:59:20,433 INFO L158 Benchmark]: Toolchain (without parser) took 375.26ms. Allocated memory is still 167.8MB. Free memory was 131.1MB in the beginning and 113.8MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 12:59:20,433 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 201.3MB. Free memory is still 126.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:59:20,434 INFO L158 Benchmark]: CACSL2BoogieTranslator took 370.47ms. Allocated memory is still 167.8MB. Free memory was 130.6MB in the beginning and 113.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 12:59:20,434 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 201.3MB. Free memory is still 126.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 370.47ms. Allocated memory is still 167.8MB. Free memory was 130.6MB in the beginning and 113.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1051]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/28-race_reach_92-evilcollapse_racing-deref.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:59:22,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:59:22,373 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-02-06 12:59:22,381 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:59:22,381 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:59:22,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:59:22,405 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:59:22,405 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:59:22,406 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:59:22,406 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:59:22,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:59:22,407 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:59:22,407 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:59:22,407 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:59:22,407 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:59:22,407 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:59:22,408 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:59:22,408 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:59:22,408 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:59:22,408 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:59:22,408 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:59:22,408 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:59:22,408 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:59:22,408 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:59:22,408 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:59:22,409 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-02-06 12:59:22,409 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-02-06 12:59:22,409 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:59:22,409 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:59:22,409 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:59:22,409 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:59:22,409 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:59:22,410 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:59:22,410 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:59:22,410 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:59:22,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:59:22,410 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:59:22,410 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:59:22,410 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-02-06 12:59:22,410 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-02-06 12:59:22,410 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:59:22,410 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:59:22,411 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:59:22,411 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:59:22,411 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 -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2025-02-06 12:59:22,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:59:22,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:59:22,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:59:22,679 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:59:22,679 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:59:22,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-02-06 12:59:23,893 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fb713615c/40adf7263d324fa6baa76fd62f4ee19a/FLAG7f4a23a23 [2025-02-06 12:59:24,143 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:59:24,146 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-02-06 12:59:24,162 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fb713615c/40adf7263d324fa6baa76fd62f4ee19a/FLAG7f4a23a23 [2025-02-06 12:59:24,178 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fb713615c/40adf7263d324fa6baa76fd62f4ee19a [2025-02-06 12:59:24,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:59:24,183 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:59:24,184 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:24,184 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:59:24,187 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:59:24,188 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,189 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16936fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24, skipping insertion in model container [2025-02-06 12:59:24,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,226 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:59:24,594 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,595 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,595 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,595 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:24,661 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-02-06 12:59:24,674 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:59:24,702 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,703 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,703 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,703 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:24,732 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:59:24,766 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,767 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,767 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,767 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:24,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:24,832 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:59:24,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24 WrapperNode [2025-02-06 12:59:24,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:24,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:59:24,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:59:24,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:59:24,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,856 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,877 INFO L138 Inliner]: procedures = 284, calls = 126, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 280 [2025-02-06 12:59:24,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:59:24,880 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:59:24,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:59:24,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:59:24,886 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,891 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,908 INFO L175 MemorySlicer]: Split 100 memory accesses to 4 slices as follows [2, 2, 91, 5]. 91 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 0, 70, 5]. The 13 writes are split as follows [0, 1, 12, 0]. [2025-02-06 12:59:24,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,921 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,924 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,931 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,941 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:59:24,942 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:59:24,942 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:59:24,942 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:59:24,943 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:59:24,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:24,967 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 12:59:24,971 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 12:59:24,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-02-06 12:59:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-02-06 12:59:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-02-06 12:59:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-06 12:59:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-06 12:59:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-06 12:59:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-02-06 12:59:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-02-06 12:59:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-02-06 12:59:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-02-06 12:59:24,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-02-06 12:59:24,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-02-06 12:59:24,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-02-06 12:59:24,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-02-06 12:59:24,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-02-06 12:59:24,992 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-02-06 12:59:24,992 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-02-06 12:59:24,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 12:59:24,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:59:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-06 12:59:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-06 12:59:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-02-06 12:59:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-02-06 12:59:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-02-06 12:59:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-02-06 12:59:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:59:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:59:24,995 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 12:59:25,150 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:59:25,152 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:59:25,844 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2025-02-06 12:59:25,844 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2025-02-06 12:59:25,974 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:59:25,975 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:59:27,367 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:59:27,367 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:59:27,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:59:27 BoogieIcfgContainer [2025-02-06 12:59:27,368 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:59:27,370 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:59:27,370 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:59:27,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:59:27,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:59:24" (1/3) ... [2025-02-06 12:59:27,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2de41d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:59:27, skipping insertion in model container [2025-02-06 12:59:27,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24" (2/3) ... [2025-02-06 12:59:27,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2de41d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:59:27, skipping insertion in model container [2025-02-06 12:59:27,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:59:27" (3/3) ... [2025-02-06 12:59:27,377 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing-deref.i [2025-02-06 12:59:27,387 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:59:27,389 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_92-evilcollapse_racing-deref.i that has 2 procedures, 118 locations, 1 initial locations, 11 loop locations, and 48 error locations. [2025-02-06 12:59:27,389 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:59:27,469 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-02-06 12:59:27,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 136 transitions, 279 flow [2025-02-06 12:59:27,558 INFO L124 PetriNetUnfolderBase]: 18/148 cut-off events. [2025-02-06 12:59:27,560 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 12:59:27,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 148 events. 18/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 519 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 85. Up to 4 conditions per place. [2025-02-06 12:59:27,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 136 transitions, 279 flow [2025-02-06 12:59:27,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 136 transitions, 279 flow [2025-02-06 12:59:27,575 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:59:27,583 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;@1cdec050, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:59:27,584 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2025-02-06 12:59:27,593 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:59:27,594 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2025-02-06 12:59:27,594 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:59:27,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:27,595 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:59:27,595 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:27,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:27,600 INFO L85 PathProgramCache]: Analyzing trace with hash 791543, now seen corresponding path program 1 times [2025-02-06 12:59:27,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:27,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661853382] [2025-02-06 12:59:27,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:27,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:27,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:27,614 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 12:59:27,616 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 12:59:27,726 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:59:27,852 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:59:27,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:27,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:27,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 12:59:27,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:27,928 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 12:59:27,928 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:27,928 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:27,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661853382] [2025-02-06 12:59:27,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661853382] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:27,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:27,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:27,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249389626] [2025-02-06 12:59:27,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:27,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:27,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:27,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:27,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:28,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 136 [2025-02-06 12:59:28,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 136 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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 12:59:28,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:28,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 136 [2025-02-06 12:59:28,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:28,565 INFO L124 PetriNetUnfolderBase]: 120/505 cut-off events. [2025-02-06 12:59:28,565 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2025-02-06 12:59:28,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 505 events. 120/505 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2873 event pairs, 61 based on Foata normal form. 68/443 useless extension candidates. Maximal degree in co-relation 675. Up to 170 conditions per place. [2025-02-06 12:59:28,569 INFO L140 encePairwiseOnDemand]: 115/136 looper letters, 64 selfloop transitions, 4 changer transitions 0/141 dead transitions. [2025-02-06 12:59:28,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 141 transitions, 425 flow [2025-02-06 12:59:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 389 transitions. [2025-02-06 12:59:28,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7150735294117647 [2025-02-06 12:59:28,581 INFO L175 Difference]: Start difference. First operand has 121 places, 136 transitions, 279 flow. Second operand 4 states and 389 transitions. [2025-02-06 12:59:28,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 141 transitions, 425 flow [2025-02-06 12:59:28,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 141 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 12:59:28,589 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 259 flow [2025-02-06 12:59:28,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2025-02-06 12:59:28,593 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2025-02-06 12:59:28,593 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 259 flow [2025-02-06 12:59:28,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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 12:59:28,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:28,594 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:59:28,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:28,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:28,795 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:28,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash 791544, now seen corresponding path program 1 times [2025-02-06 12:59:28,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:28,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026645489] [2025-02-06 12:59:28,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:28,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:28,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:28,798 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 12:59:28,799 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 12:59:28,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:59:29,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:59:29,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:29,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:29,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 12:59:29,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:29,098 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 12:59:29,098 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:29,098 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:29,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026645489] [2025-02-06 12:59:29,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026645489] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:29,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:29,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:29,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024323378] [2025-02-06 12:59:29,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:29,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:29,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:29,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:29,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:29,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 136 [2025-02-06 12:59:29,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 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 12:59:29,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:29,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 136 [2025-02-06 12:59:29,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:29,707 INFO L124 PetriNetUnfolderBase]: 122/535 cut-off events. [2025-02-06 12:59:29,707 INFO L125 PetriNetUnfolderBase]: For 20/21 co-relation queries the response was YES. [2025-02-06 12:59:29,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 535 events. 122/535 cut-off events. For 20/21 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3014 event pairs, 100 based on Foata normal form. 3/407 useless extension candidates. Maximal degree in co-relation 740. Up to 263 conditions per place. [2025-02-06 12:59:29,710 INFO L140 encePairwiseOnDemand]: 128/136 looper letters, 46 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2025-02-06 12:59:29,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 375 flow [2025-02-06 12:59:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2025-02-06 12:59:29,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6580882352941176 [2025-02-06 12:59:29,715 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 259 flow. Second operand 4 states and 358 transitions. [2025-02-06 12:59:29,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 375 flow [2025-02-06 12:59:29,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 123 transitions, 363 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:29,721 INFO L231 Difference]: Finished difference. Result has 122 places, 123 transitions, 292 flow [2025-02-06 12:59:29,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2025-02-06 12:59:29,722 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2025-02-06 12:59:29,722 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 292 flow [2025-02-06 12:59:29,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 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 12:59:29,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:29,722 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 12:59:29,738 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 12:59:29,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:29,927 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:29,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:29,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2106766297, now seen corresponding path program 1 times [2025-02-06 12:59:29,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:29,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284574470] [2025-02-06 12:59:29,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:29,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:29,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:29,931 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 12:59:29,932 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 12:59:30,003 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:59:30,147 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:59:30,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:30,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:30,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 12:59:30,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:30,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:30,203 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 12:59:30,203 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:30,203 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:30,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284574470] [2025-02-06 12:59:30,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284574470] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:30,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:30,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:30,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989648631] [2025-02-06 12:59:30,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:30,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:30,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:30,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:30,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:30,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 136 [2025-02-06 12:59:30,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 12:59:30,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:30,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 136 [2025-02-06 12:59:30,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:30,547 INFO L124 PetriNetUnfolderBase]: 122/534 cut-off events. [2025-02-06 12:59:30,547 INFO L125 PetriNetUnfolderBase]: For 14/15 co-relation queries the response was YES. [2025-02-06 12:59:30,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 534 events. 122/534 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3009 event pairs, 100 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 813. Up to 259 conditions per place. [2025-02-06 12:59:30,551 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 44 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2025-02-06 12:59:30,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 122 transitions, 384 flow [2025-02-06 12:59:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2025-02-06 12:59:30,554 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6887254901960784 [2025-02-06 12:59:30,554 INFO L175 Difference]: Start difference. First operand has 122 places, 123 transitions, 292 flow. Second operand 3 states and 281 transitions. [2025-02-06 12:59:30,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 122 transitions, 384 flow [2025-02-06 12:59:30,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 122 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:30,558 INFO L231 Difference]: Finished difference. Result has 122 places, 122 transitions, 293 flow [2025-02-06 12:59:30,558 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=122, PETRI_TRANSITIONS=122} [2025-02-06 12:59:30,559 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2025-02-06 12:59:30,559 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 122 transitions, 293 flow [2025-02-06 12:59:30,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 12:59:30,559 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:30,559 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 12:59:30,571 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 12:59:30,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:30,769 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:30,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2106766296, now seen corresponding path program 1 times [2025-02-06 12:59:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:30,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152346975] [2025-02-06 12:59:30,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:30,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:30,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:30,826 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 12:59:30,845 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 12:59:30,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:59:31,036 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:59:31,036 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:31,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:31,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 12:59:31,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:31,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-02-06 12:59:31,067 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 12:59:31,067 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:31,067 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:31,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152346975] [2025-02-06 12:59:31,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152346975] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:31,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:31,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:31,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641951551] [2025-02-06 12:59:31,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:31,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:31,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:31,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:31,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:31,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 136 [2025-02-06 12:59:31,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 122 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 12:59:31,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:31,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 136 [2025-02-06 12:59:31,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:31,390 INFO L124 PetriNetUnfolderBase]: 122/533 cut-off events. [2025-02-06 12:59:31,390 INFO L125 PetriNetUnfolderBase]: For 16/17 co-relation queries the response was YES. [2025-02-06 12:59:31,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 533 events. 122/533 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3001 event pairs, 100 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 812. Up to 259 conditions per place. [2025-02-06 12:59:31,393 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 44 selfloop transitions, 3 changer transitions 0/121 dead transitions. [2025-02-06 12:59:31,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 121 transitions, 385 flow [2025-02-06 12:59:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2025-02-06 12:59:31,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6887254901960784 [2025-02-06 12:59:31,394 INFO L175 Difference]: Start difference. First operand has 122 places, 122 transitions, 293 flow. Second operand 3 states and 281 transitions. [2025-02-06 12:59:31,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 121 transitions, 385 flow [2025-02-06 12:59:31,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 121 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:31,396 INFO L231 Difference]: Finished difference. Result has 121 places, 121 transitions, 291 flow [2025-02-06 12:59:31,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=121, PETRI_TRANSITIONS=121} [2025-02-06 12:59:31,397 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 0 predicate places. [2025-02-06 12:59:31,397 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 121 transitions, 291 flow [2025-02-06 12:59:31,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 12:59:31,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:31,397 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-02-06 12:59:31,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:31,598 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 [2025-02-06 12:59:31,598 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:31,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash 885248547, now seen corresponding path program 1 times [2025-02-06 12:59:31,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:31,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153215415] [2025-02-06 12:59:31,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:31,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:31,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:31,603 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 12:59:31,604 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 12:59:31,668 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 12:59:31,789 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 12:59:31,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:31,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:31,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-06 12:59:31,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:31,812 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:31,812 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:31,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153215415] [2025-02-06 12:59:31,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153215415] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:31,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:31,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:31,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197042242] [2025-02-06 12:59:31,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:31,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:31,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:31,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:31,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:31,814 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 136 [2025-02-06 12:59:31,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 121 transitions, 291 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 12:59:31,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:31,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 136 [2025-02-06 12:59:31,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:32,047 INFO L124 PetriNetUnfolderBase]: 121/555 cut-off events. [2025-02-06 12:59:32,047 INFO L125 PetriNetUnfolderBase]: For 18/19 co-relation queries the response was YES. [2025-02-06 12:59:32,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 555 events. 121/555 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3045 event pairs, 100 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 843. Up to 259 conditions per place. [2025-02-06 12:59:32,051 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 48 selfloop transitions, 3 changer transitions 0/125 dead transitions. [2025-02-06 12:59:32,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 125 transitions, 405 flow [2025-02-06 12:59:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:32,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2025-02-06 12:59:32,052 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2025-02-06 12:59:32,052 INFO L175 Difference]: Start difference. First operand has 121 places, 121 transitions, 291 flow. Second operand 3 states and 289 transitions. [2025-02-06 12:59:32,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 125 transitions, 405 flow [2025-02-06 12:59:32,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 125 transitions, 395 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:32,054 INFO L231 Difference]: Finished difference. Result has 122 places, 121 transitions, 296 flow [2025-02-06 12:59:32,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=122, PETRI_TRANSITIONS=121} [2025-02-06 12:59:32,055 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2025-02-06 12:59:32,055 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 121 transitions, 296 flow [2025-02-06 12:59:32,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 12:59:32,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:32,055 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:32,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:32,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,256 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:32,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:32,256 INFO L85 PathProgramCache]: Analyzing trace with hash 885246526, now seen corresponding path program 1 times [2025-02-06 12:59:32,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:32,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894082502] [2025-02-06 12:59:32,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:32,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:32,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:32,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 12:59:32,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 12:59:32,441 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 12:59:32,441 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:32,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:32,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 12:59:32,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:32,467 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 12:59:32,467 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:32,467 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:32,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894082502] [2025-02-06 12:59:32,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894082502] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:32,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:32,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:32,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330338685] [2025-02-06 12:59:32,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:32,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:32,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:32,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:32,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:32,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 136 [2025-02-06 12:59:32,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 121 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 12:59:32,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:32,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 136 [2025-02-06 12:59:32,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:32,744 INFO L124 PetriNetUnfolderBase]: 121/551 cut-off events. [2025-02-06 12:59:32,745 INFO L125 PetriNetUnfolderBase]: For 23/24 co-relation queries the response was YES. [2025-02-06 12:59:32,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 551 events. 121/551 cut-off events. For 23/24 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3025 event pairs, 100 based on Foata normal form. 0/416 useless extension candidates. Maximal degree in co-relation 842. Up to 264 conditions per place. [2025-02-06 12:59:32,747 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 44 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2025-02-06 12:59:32,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 119 transitions, 390 flow [2025-02-06 12:59:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2025-02-06 12:59:32,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6593137254901961 [2025-02-06 12:59:32,749 INFO L175 Difference]: Start difference. First operand has 122 places, 121 transitions, 296 flow. Second operand 3 states and 269 transitions. [2025-02-06 12:59:32,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 119 transitions, 390 flow [2025-02-06 12:59:32,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 119 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:32,756 INFO L231 Difference]: Finished difference. Result has 121 places, 119 transitions, 299 flow [2025-02-06 12:59:32,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=121, PETRI_TRANSITIONS=119} [2025-02-06 12:59:32,758 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 0 predicate places. [2025-02-06 12:59:32,758 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 119 transitions, 299 flow [2025-02-06 12:59:32,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 12:59:32,758 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:32,759 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:32,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 12:59:32,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,959 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:32,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash 885246527, now seen corresponding path program 1 times [2025-02-06 12:59:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:32,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844613113] [2025-02-06 12:59:32,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:32,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:32,962 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:32,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 12:59:33,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 12:59:33,183 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 12:59:33,183 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:33,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:33,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:59:33,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:33,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:33,247 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 12:59:33,247 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:33,247 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:33,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844613113] [2025-02-06 12:59:33,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844613113] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:33,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:33,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:33,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571748988] [2025-02-06 12:59:33,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:33,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:33,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:33,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:33,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 136 [2025-02-06 12:59:33,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 119 transitions, 299 flow. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 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 12:59:33,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:33,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 136 [2025-02-06 12:59:33,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:33,640 INFO L124 PetriNetUnfolderBase]: 121/547 cut-off events. [2025-02-06 12:59:33,641 INFO L125 PetriNetUnfolderBase]: For 26/27 co-relation queries the response was YES. [2025-02-06 12:59:33,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 547 events. 121/547 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3016 event pairs, 100 based on Foata normal form. 4/416 useless extension candidates. Maximal degree in co-relation 839. Up to 263 conditions per place. [2025-02-06 12:59:33,643 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 45 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2025-02-06 12:59:33,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 117 transitions, 393 flow [2025-02-06 12:59:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2025-02-06 12:59:33,644 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6378676470588235 [2025-02-06 12:59:33,644 INFO L175 Difference]: Start difference. First operand has 121 places, 119 transitions, 299 flow. Second operand 4 states and 347 transitions. [2025-02-06 12:59:33,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 117 transitions, 393 flow [2025-02-06 12:59:33,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 117 transitions, 383 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:33,646 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 293 flow [2025-02-06 12:59:33,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2025-02-06 12:59:33,647 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2025-02-06 12:59:33,647 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 293 flow [2025-02-06 12:59:33,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 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 12:59:33,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:33,647 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:33,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:33,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:33,848 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:33,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash 318409534, now seen corresponding path program 1 times [2025-02-06 12:59:33,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:33,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250076109] [2025-02-06 12:59:33,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:33,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:33,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:33,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 12:59:33,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:59:34,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:59:34,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:34,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:34,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 12:59:34,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:34,110 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2025-02-06 12:59:34,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2025-02-06 12:59:34,172 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 12:59:34,172 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:34,172 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:34,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250076109] [2025-02-06 12:59:34,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250076109] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:34,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:34,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:59:34,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146420137] [2025-02-06 12:59:34,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:34,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:59:34,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:34,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:59:34,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:59:34,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 136 [2025-02-06 12:59:34,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 74.5) internal successors, (447), 6 states have internal predecessors, (447), 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 12:59:34,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:34,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 136 [2025-02-06 12:59:34,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:34,749 INFO L124 PetriNetUnfolderBase]: 120/518 cut-off events. [2025-02-06 12:59:34,749 INFO L125 PetriNetUnfolderBase]: For 19/20 co-relation queries the response was YES. [2025-02-06 12:59:34,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 518 events. 120/518 cut-off events. For 19/20 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2818 event pairs, 61 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 818. Up to 177 conditions per place. [2025-02-06 12:59:34,752 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 67 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2025-02-06 12:59:34,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 137 transitions, 477 flow [2025-02-06 12:59:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 362 transitions. [2025-02-06 12:59:34,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6654411764705882 [2025-02-06 12:59:34,754 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 293 flow. Second operand 4 states and 362 transitions. [2025-02-06 12:59:34,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 137 transitions, 477 flow [2025-02-06 12:59:34,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 137 transitions, 469 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:34,756 INFO L231 Difference]: Finished difference. Result has 118 places, 115 transitions, 291 flow [2025-02-06 12:59:34,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=291, PETRI_PLACES=118, PETRI_TRANSITIONS=115} [2025-02-06 12:59:34,757 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2025-02-06 12:59:34,757 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 115 transitions, 291 flow [2025-02-06 12:59:34,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.5) internal successors, (447), 6 states have internal predecessors, (447), 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 12:59:34,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:34,757 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:34,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 12:59:34,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:34,958 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:34,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash 318409535, now seen corresponding path program 1 times [2025-02-06 12:59:34,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:34,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314946844] [2025-02-06 12:59:34,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:34,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:34,960 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:34,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 12:59:35,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:59:35,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:59:35,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:35,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:35,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 12:59:35,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:59:35,278 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 12:59:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:35,329 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:35,329 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:35,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314946844] [2025-02-06 12:59:35,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314946844] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:35,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:35,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:35,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131447781] [2025-02-06 12:59:35,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:35,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:59:35,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:35,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:59:35,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:59:35,580 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 136 [2025-02-06 12:59:35,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 115 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 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 12:59:35,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:35,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 136 [2025-02-06 12:59:35,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:36,023 INFO L124 PetriNetUnfolderBase]: 123/575 cut-off events. [2025-02-06 12:59:36,023 INFO L125 PetriNetUnfolderBase]: For 47/48 co-relation queries the response was YES. [2025-02-06 12:59:36,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 575 events. 123/575 cut-off events. For 47/48 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3262 event pairs, 101 based on Foata normal form. 2/432 useless extension candidates. Maximal degree in co-relation 858. Up to 270 conditions per place. [2025-02-06 12:59:36,025 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 52 selfloop transitions, 5 changer transitions 0/122 dead transitions. [2025-02-06 12:59:36,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 122 transitions, 435 flow [2025-02-06 12:59:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 356 transitions. [2025-02-06 12:59:36,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6544117647058824 [2025-02-06 12:59:36,027 INFO L175 Difference]: Start difference. First operand has 118 places, 115 transitions, 291 flow. Second operand 4 states and 356 transitions. [2025-02-06 12:59:36,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 122 transitions, 435 flow [2025-02-06 12:59:36,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 419 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:36,029 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 327 flow [2025-02-06 12:59:36,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=327, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2025-02-06 12:59:36,029 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2025-02-06 12:59:36,029 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 327 flow [2025-02-06 12:59:36,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 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 12:59:36,030 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:36,030 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:36,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 12:59:36,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:36,230 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:36,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:36,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1280761756, now seen corresponding path program 1 times [2025-02-06 12:59:36,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:36,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119334489] [2025-02-06 12:59:36,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:36,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:36,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:36,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:36,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 12:59:36,299 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 12:59:36,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 12:59:36,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:36,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:36,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 12:59:36,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:36,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:59:36,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2025-02-06 12:59:36,603 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 12:59:36,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-02-06 12:59:36,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2025-02-06 12:59:36,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2025-02-06 12:59:36,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2025-02-06 12:59:36,723 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 12:59:36,724 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:36,724 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:36,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119334489] [2025-02-06 12:59:36,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119334489] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:36,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:36,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 12:59:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405517890] [2025-02-06 12:59:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:36,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 12:59:36,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:36,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 12:59:36,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 12:59:37,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 136 [2025-02-06 12:59:37,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 63.0) internal successors, (630), 10 states have internal predecessors, (630), 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 12:59:37,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:37,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 136 [2025-02-06 12:59:37,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:38,527 INFO L124 PetriNetUnfolderBase]: 123/574 cut-off events. [2025-02-06 12:59:38,527 INFO L125 PetriNetUnfolderBase]: For 26/27 co-relation queries the response was YES. [2025-02-06 12:59:38,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 574 events. 123/574 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3223 event pairs, 101 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 866. Up to 279 conditions per place. [2025-02-06 12:59:38,529 INFO L140 encePairwiseOnDemand]: 124/136 looper letters, 65 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2025-02-06 12:59:38,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 135 transitions, 517 flow [2025-02-06 12:59:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 12:59:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 12:59:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 758 transitions. [2025-02-06 12:59:38,531 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5066844919786097 [2025-02-06 12:59:38,531 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 327 flow. Second operand 11 states and 758 transitions. [2025-02-06 12:59:38,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 135 transitions, 517 flow [2025-02-06 12:59:38,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 135 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:38,534 INFO L231 Difference]: Finished difference. Result has 134 places, 124 transitions, 383 flow [2025-02-06 12:59:38,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=383, PETRI_PLACES=134, PETRI_TRANSITIONS=124} [2025-02-06 12:59:38,534 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 13 predicate places. [2025-02-06 12:59:38,534 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 124 transitions, 383 flow [2025-02-06 12:59:38,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 63.0) internal successors, (630), 10 states have internal predecessors, (630), 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 12:59:38,535 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:38,535 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:38,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 12:59:38,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:38,735 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:38,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1280761757, now seen corresponding path program 1 times [2025-02-06 12:59:38,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:38,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447729658] [2025-02-06 12:59:38,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:38,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:38,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:38,738 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:38,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 12:59:38,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 12:59:38,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 12:59:38,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:38,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:38,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-06 12:59:38,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:39,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:59:39,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:59:39,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2025-02-06 12:59:39,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2025-02-06 12:59:39,151 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 12:59:39,151 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 13 [2025-02-06 12:59:39,161 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 12:59:39,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2025-02-06 12:59:39,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2025-02-06 12:59:39,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2025-02-06 12:59:39,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2025-02-06 12:59:39,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2025-02-06 12:59:39,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2025-02-06 12:59:39,334 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 12:59:39,335 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:39,335 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:39,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447729658] [2025-02-06 12:59:39,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447729658] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:39,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:39,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 12:59:39,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005293392] [2025-02-06 12:59:39,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:39,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 12:59:39,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:39,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 12:59:39,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-06 12:59:40,380 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 136 [2025-02-06 12:59:40,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 124 transitions, 383 flow. Second operand has 10 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 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 12:59:40,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:40,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 136 [2025-02-06 12:59:40,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:40,888 INFO L124 PetriNetUnfolderBase]: 123/573 cut-off events. [2025-02-06 12:59:40,889 INFO L125 PetriNetUnfolderBase]: For 37/38 co-relation queries the response was YES. [2025-02-06 12:59:40,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 995 conditions, 573 events. 123/573 cut-off events. For 37/38 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3239 event pairs, 101 based on Foata normal form. 1/447 useless extension candidates. Maximal degree in co-relation 915. Up to 283 conditions per place. [2025-02-06 12:59:40,891 INFO L140 encePairwiseOnDemand]: 125/136 looper letters, 68 selfloop transitions, 10 changer transitions 0/135 dead transitions. [2025-02-06 12:59:40,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 135 transitions, 569 flow [2025-02-06 12:59:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 12:59:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 12:59:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 678 transitions. [2025-02-06 12:59:40,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4985294117647059 [2025-02-06 12:59:40,895 INFO L175 Difference]: Start difference. First operand has 134 places, 124 transitions, 383 flow. Second operand 10 states and 678 transitions. [2025-02-06 12:59:40,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 135 transitions, 569 flow [2025-02-06 12:59:40,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 135 transitions, 565 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:40,898 INFO L231 Difference]: Finished difference. Result has 142 places, 124 transitions, 403 flow [2025-02-06 12:59:40,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=403, PETRI_PLACES=142, PETRI_TRANSITIONS=124} [2025-02-06 12:59:40,899 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 21 predicate places. [2025-02-06 12:59:40,899 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 124 transitions, 403 flow [2025-02-06 12:59:40,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 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 12:59:40,900 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:40,900 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:40,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 12:59:41,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:41,101 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:41,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1048909486, now seen corresponding path program 1 times [2025-02-06 12:59:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:41,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270865266] [2025-02-06 12:59:41,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:41,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:41,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:41,104 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:41,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 12:59:41,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:59:41,320 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:59:41,320 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:41,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:41,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 12:59:41,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:41,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:41,385 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 12:59:41,385 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:41,385 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:41,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270865266] [2025-02-06 12:59:41,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270865266] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:41,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:41,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:41,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086165285] [2025-02-06 12:59:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:41,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:41,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:41,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:41,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:41,542 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 136 [2025-02-06 12:59:41,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 124 transitions, 403 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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 12:59:41,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:41,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 136 [2025-02-06 12:59:41,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:41,750 INFO L124 PetriNetUnfolderBase]: 122/563 cut-off events. [2025-02-06 12:59:41,750 INFO L125 PetriNetUnfolderBase]: For 70/71 co-relation queries the response was YES. [2025-02-06 12:59:41,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 563 events. 122/563 cut-off events. For 70/71 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3175 event pairs, 100 based on Foata normal form. 8/441 useless extension candidates. Maximal degree in co-relation 887. Up to 260 conditions per place. [2025-02-06 12:59:41,753 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 45 selfloop transitions, 9 changer transitions 0/122 dead transitions. [2025-02-06 12:59:41,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 122 transitions, 507 flow [2025-02-06 12:59:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 353 transitions. [2025-02-06 12:59:41,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6488970588235294 [2025-02-06 12:59:41,754 INFO L175 Difference]: Start difference. First operand has 142 places, 124 transitions, 403 flow. Second operand 4 states and 353 transitions. [2025-02-06 12:59:41,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 122 transitions, 507 flow [2025-02-06 12:59:41,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 122 transitions, 487 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-02-06 12:59:41,757 INFO L231 Difference]: Finished difference. Result has 134 places, 122 transitions, 397 flow [2025-02-06 12:59:41,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=397, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2025-02-06 12:59:41,759 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 13 predicate places. [2025-02-06 12:59:41,760 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 397 flow [2025-02-06 12:59:41,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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 12:59:41,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:41,761 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:41,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 12:59:41,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:41,961 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:41,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:41,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1048909485, now seen corresponding path program 1 times [2025-02-06 12:59:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:41,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87301307] [2025-02-06 12:59:41,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:41,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:41,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:41,964 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:41,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 12:59:42,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:59:42,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:59:42,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:42,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:42,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:59:42,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:42,196 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 12:59:42,196 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:42,196 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:42,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87301307] [2025-02-06 12:59:42,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87301307] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:42,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:59:42,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964337514] [2025-02-06 12:59:42,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:42,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:59:42,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:42,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:59:42,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:59:42,398 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 136 [2025-02-06 12:59:42,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 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 12:59:42,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:42,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 136 [2025-02-06 12:59:42,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:42,657 INFO L124 PetriNetUnfolderBase]: 122/555 cut-off events. [2025-02-06 12:59:42,658 INFO L125 PetriNetUnfolderBase]: For 56/57 co-relation queries the response was YES. [2025-02-06 12:59:42,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 555 events. 122/555 cut-off events. For 56/57 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3122 event pairs, 100 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 896. Up to 262 conditions per place. [2025-02-06 12:59:42,660 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 48 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2025-02-06 12:59:42,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 120 transitions, 511 flow [2025-02-06 12:59:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:59:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:59:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2025-02-06 12:59:42,661 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6088235294117647 [2025-02-06 12:59:42,661 INFO L175 Difference]: Start difference. First operand has 134 places, 122 transitions, 397 flow. Second operand 5 states and 414 transitions. [2025-02-06 12:59:42,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 120 transitions, 511 flow [2025-02-06 12:59:42,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 120 transitions, 493 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:42,665 INFO L231 Difference]: Finished difference. Result has 133 places, 120 transitions, 397 flow [2025-02-06 12:59:42,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=133, PETRI_TRANSITIONS=120} [2025-02-06 12:59:42,665 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 12 predicate places. [2025-02-06 12:59:42,665 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 120 transitions, 397 flow [2025-02-06 12:59:42,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 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 12:59:42,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:42,666 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:42,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 12:59:42,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:42,866 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:42,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash -430477444, now seen corresponding path program 1 times [2025-02-06 12:59:42,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:42,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358745561] [2025-02-06 12:59:42,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:42,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:42,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:42,869 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:42,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 12:59:42,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 12:59:43,127 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 12:59:43,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:43,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:43,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 12:59:43,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:43,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:43,181 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358745561] [2025-02-06 12:59:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358745561] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:43,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:59:43,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-02-06 12:59:43,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076050648] [2025-02-06 12:59:43,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:43,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:59:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:43,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:59:43,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:59:43,182 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 136 [2025-02-06 12:59:43,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 120 transitions, 397 flow. Second operand has 6 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 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 12:59:43,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:43,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 136 [2025-02-06 12:59:43,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:43,545 INFO L124 PetriNetUnfolderBase]: 122/605 cut-off events. [2025-02-06 12:59:43,545 INFO L125 PetriNetUnfolderBase]: For 154/155 co-relation queries the response was YES. [2025-02-06 12:59:43,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 605 events. 122/605 cut-off events. For 154/155 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3293 event pairs, 100 based on Foata normal form. 6/485 useless extension candidates. Maximal degree in co-relation 1019. Up to 256 conditions per place. [2025-02-06 12:59:43,548 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 62 selfloop transitions, 11 changer transitions 0/139 dead transitions. [2025-02-06 12:59:43,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 139 transitions, 671 flow [2025-02-06 12:59:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:59:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:59:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 542 transitions. [2025-02-06 12:59:43,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6642156862745098 [2025-02-06 12:59:43,550 INFO L175 Difference]: Start difference. First operand has 133 places, 120 transitions, 397 flow. Second operand 6 states and 542 transitions. [2025-02-06 12:59:43,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 139 transitions, 671 flow [2025-02-06 12:59:43,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 139 transitions, 617 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:43,552 INFO L231 Difference]: Finished difference. Result has 138 places, 125 transitions, 461 flow [2025-02-06 12:59:43,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=461, PETRI_PLACES=138, PETRI_TRANSITIONS=125} [2025-02-06 12:59:43,553 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 17 predicate places. [2025-02-06 12:59:43,553 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 125 transitions, 461 flow [2025-02-06 12:59:43,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 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 12:59:43,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:43,553 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:43,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:43,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:43,754 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:43,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:43,754 INFO L85 PathProgramCache]: Analyzing trace with hash 359307172, now seen corresponding path program 1 times [2025-02-06 12:59:43,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:43,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783718107] [2025-02-06 12:59:43,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:43,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:43,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:43,756 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:43,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 12:59:43,846 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 12:59:44,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:59:44,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:44,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:44,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-06 12:59:44,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:44,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:44,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-02-06 12:59:44,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-02-06 12:59:44,287 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2025-02-06 12:59:44,288 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 22 treesize of output 29 [2025-02-06 12:59:44,320 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2025-02-06 12:59:44,321 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 28 treesize of output 30 [2025-02-06 12:59:44,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 27 [2025-02-06 12:59:44,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2025-02-06 12:59:44,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 15 [2025-02-06 12:59:44,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 27 [2025-02-06 12:59:44,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 19 [2025-02-06 12:59:44,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 12:59:44,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-02-06 12:59:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:44,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:44,611 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_577 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_577) |c_~#c~0.base|) .cse1)))))) is different from false [2025-02-06 12:59:45,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:45,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 38 [2025-02-06 12:59:45,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:45,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2025-02-06 12:59:45,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-02-06 12:59:45,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:45,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2025-02-06 12:59:45,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:45,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2025-02-06 12:59:45,163 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 12:59:45,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:45,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2025-02-06 12:59:45,190 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 12:59:45,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:45,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2025-02-06 12:59:46,513 INFO L349 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2025-02-06 12:59:46,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 91 [2025-02-06 12:59:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-02-06 12:59:46,997 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:46,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783718107] [2025-02-06 12:59:46,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783718107] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:46,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:59:46,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2025-02-06 12:59:46,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112866321] [2025-02-06 12:59:46,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:46,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 12:59:46,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:46,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 12:59:46,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=354, Unknown=12, NotChecked=38, Total=462 [2025-02-06 12:59:47,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 136 [2025-02-06 12:59:47,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 125 transitions, 461 flow. Second operand has 22 states, 22 states have (on average 24.545454545454547) internal successors, (540), 22 states have internal predecessors, (540), 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 12:59:47,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:47,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 136 [2025-02-06 12:59:47,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:51,122 INFO L124 PetriNetUnfolderBase]: 465/1304 cut-off events. [2025-02-06 12:59:51,122 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2025-02-06 12:59:51,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2564 conditions, 1304 events. 465/1304 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7849 event pairs, 422 based on Foata normal form. 6/876 useless extension candidates. Maximal degree in co-relation 2484. Up to 955 conditions per place. [2025-02-06 12:59:51,127 INFO L140 encePairwiseOnDemand]: 126/136 looper letters, 85 selfloop transitions, 28 changer transitions 0/136 dead transitions. [2025-02-06 12:59:51,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 136 transitions, 727 flow [2025-02-06 12:59:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 12:59:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 12:59:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 419 transitions. [2025-02-06 12:59:51,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.22006302521008403 [2025-02-06 12:59:51,130 INFO L175 Difference]: Start difference. First operand has 138 places, 125 transitions, 461 flow. Second operand 14 states and 419 transitions. [2025-02-06 12:59:51,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 136 transitions, 727 flow [2025-02-06 12:59:51,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 136 transitions, 711 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:51,168 INFO L231 Difference]: Finished difference. Result has 153 places, 132 transitions, 543 flow [2025-02-06 12:59:51,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=543, PETRI_PLACES=153, PETRI_TRANSITIONS=132} [2025-02-06 12:59:51,169 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 32 predicate places. [2025-02-06 12:59:51,169 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 132 transitions, 543 flow [2025-02-06 12:59:51,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.545454545454547) internal successors, (540), 22 states have internal predecessors, (540), 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 12:59:51,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:51,171 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:51,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 12:59:51,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:51,372 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:51,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 359307171, now seen corresponding path program 1 times [2025-02-06 12:59:51,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:51,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392568511] [2025-02-06 12:59:51,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:51,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:51,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:51,376 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:51,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 12:59:51,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 12:59:51,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:59:51,657 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:51,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:51,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 12:59:51,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:51,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-02-06 12:59:51,853 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2025-02-06 12:59:51,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 52 [2025-02-06 12:59:51,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 29 [2025-02-06 12:59:51,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 29 [2025-02-06 12:59:51,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 21 [2025-02-06 12:59:51,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-06 12:59:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:52,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:52,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:52,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2025-02-06 12:59:52,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:52,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2025-02-06 12:59:52,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2025-02-06 12:59:53,624 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2025-02-06 12:59:53,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 290 [2025-02-06 12:59:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:53,872 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:53,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392568511] [2025-02-06 12:59:53,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392568511] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:53,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:59:53,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2025-02-06 12:59:53,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673384064] [2025-02-06 12:59:53,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:53,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 12:59:53,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:53,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 12:59:53,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=275, Unknown=16, NotChecked=0, Total=342 [2025-02-06 12:59:59,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:00:03,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:00:05,011 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 136 [2025-02-06 13:00:05,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 132 transitions, 543 flow. Second operand has 19 states, 19 states have (on average 34.68421052631579) internal successors, (659), 19 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:00:05,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:05,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 136 [2025-02-06 13:00:05,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:06,466 INFO L124 PetriNetUnfolderBase]: 329/1064 cut-off events. [2025-02-06 13:00:06,466 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2025-02-06 13:00:06,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2109 conditions, 1064 events. 329/1064 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6326 event pairs, 292 based on Foata normal form. 6/839 useless extension candidates. Maximal degree in co-relation 2016. Up to 679 conditions per place. [2025-02-06 13:00:06,470 INFO L140 encePairwiseOnDemand]: 128/136 looper letters, 76 selfloop transitions, 26 changer transitions 0/135 dead transitions. [2025-02-06 13:00:06,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 135 transitions, 757 flow [2025-02-06 13:00:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 13:00:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 13:00:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 482 transitions. [2025-02-06 13:00:06,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29534313725490197 [2025-02-06 13:00:06,472 INFO L175 Difference]: Start difference. First operand has 153 places, 132 transitions, 543 flow. Second operand 12 states and 482 transitions. [2025-02-06 13:00:06,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 135 transitions, 757 flow [2025-02-06 13:00:06,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 135 transitions, 720 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-02-06 13:00:06,476 INFO L231 Difference]: Finished difference. Result has 161 places, 132 transitions, 567 flow [2025-02-06 13:00:06,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=567, PETRI_PLACES=161, PETRI_TRANSITIONS=132} [2025-02-06 13:00:06,476 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 40 predicate places. [2025-02-06 13:00:06,477 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 132 transitions, 567 flow [2025-02-06 13:00:06,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 34.68421052631579) internal successors, (659), 19 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:00:06,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:06,477 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:06,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 13:00:06,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:06,678 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 13:00:06,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:06,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1479740730, now seen corresponding path program 1 times [2025-02-06 13:00:06,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:00:06,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298317795] [2025-02-06 13:00:06,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:00:06,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:06,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:06,682 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:06,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 13:00:06,798 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-06 13:00:07,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 13:00:07,010 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:00:07,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:07,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 13:00:07,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-02-06 13:00:07,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-02-06 13:00:07,132 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:00:07,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298317795] [2025-02-06 13:00:07,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298317795] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:00:07,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:00:07,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2025-02-06 13:00:07,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836323870] [2025-02-06 13:00:07,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:00:07,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:00:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:00:07,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:00:07,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:00:07,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 136 [2025-02-06 13:00:07,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 132 transitions, 567 flow. Second operand has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:00:07,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:07,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 136 [2025-02-06 13:00:07,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:07,519 INFO L124 PetriNetUnfolderBase]: 124/700 cut-off events. [2025-02-06 13:00:07,519 INFO L125 PetriNetUnfolderBase]: For 399/400 co-relation queries the response was YES. [2025-02-06 13:00:07,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1545 conditions, 700 events. 124/700 cut-off events. For 399/400 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2884 event pairs, 100 based on Foata normal form. 0/581 useless extension candidates. Maximal degree in co-relation 1450. Up to 250 conditions per place. [2025-02-06 13:00:07,522 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 94 selfloop transitions, 6 changer transitions 0/169 dead transitions. [2025-02-06 13:00:07,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 169 transitions, 1091 flow [2025-02-06 13:00:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:00:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:00:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 551 transitions. [2025-02-06 13:00:07,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6752450980392157 [2025-02-06 13:00:07,524 INFO L175 Difference]: Start difference. First operand has 161 places, 132 transitions, 567 flow. Second operand 6 states and 551 transitions. [2025-02-06 13:00:07,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 169 transitions, 1091 flow [2025-02-06 13:00:07,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 169 transitions, 975 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-02-06 13:00:07,528 INFO L231 Difference]: Finished difference. Result has 159 places, 135 transitions, 574 flow [2025-02-06 13:00:07,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=574, PETRI_PLACES=159, PETRI_TRANSITIONS=135} [2025-02-06 13:00:07,529 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 38 predicate places. [2025-02-06 13:00:07,529 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 135 transitions, 574 flow [2025-02-06 13:00:07,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:00:07,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:07,529 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-02-06 13:00:07,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-06 13:00:07,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:07,730 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 13:00:07,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:07,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1479740829, now seen corresponding path program 2 times [2025-02-06 13:00:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:00:07,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574115382] [2025-02-06 13:00:07,731 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:00:07,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:07,733 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:07,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 13:00:07,887 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-06 13:00:08,152 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 13:00:08,152 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:00:08,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:08,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:00:08,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:00:08,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:00:08,334 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:00:08,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574115382] [2025-02-06 13:00:08,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574115382] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:00:08,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:00:08,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-02-06 13:00:08,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267743639] [2025-02-06 13:00:08,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:00:08,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:00:08,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:00:08,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:00:08,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:00:08,335 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 136 [2025-02-06 13:00:08,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 135 transitions, 574 flow. Second operand has 12 states, 12 states have (on average 83.91666666666667) internal successors, (1007), 12 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:00:08,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:08,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 136 [2025-02-06 13:00:08,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:09,294 INFO L124 PetriNetUnfolderBase]: 124/952 cut-off events. [2025-02-06 13:00:09,294 INFO L125 PetriNetUnfolderBase]: For 848/849 co-relation queries the response was YES. [2025-02-06 13:00:09,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277 conditions, 952 events. 124/952 cut-off events. For 848/849 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2959 event pairs, 100 based on Foata normal form. 24/858 useless extension candidates. Maximal degree in co-relation 2183. Up to 263 conditions per place. [2025-02-06 13:00:09,298 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 95 selfloop transitions, 23 changer transitions 0/187 dead transitions. [2025-02-06 13:00:09,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 187 transitions, 1190 flow [2025-02-06 13:00:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 13:00:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 13:00:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1055 transitions. [2025-02-06 13:00:09,300 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6464460784313726 [2025-02-06 13:00:09,300 INFO L175 Difference]: Start difference. First operand has 159 places, 135 transitions, 574 flow. Second operand 12 states and 1055 transitions. [2025-02-06 13:00:09,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 187 transitions, 1190 flow [2025-02-06 13:00:09,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 187 transitions, 1188 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:00:09,306 INFO L231 Difference]: Finished difference. Result has 176 places, 148 transitions, 849 flow [2025-02-06 13:00:09,306 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=849, PETRI_PLACES=176, PETRI_TRANSITIONS=148} [2025-02-06 13:00:09,307 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 55 predicate places. [2025-02-06 13:00:09,307 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 148 transitions, 849 flow [2025-02-06 13:00:09,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 83.91666666666667) internal successors, (1007), 12 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:00:09,307 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:09,307 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-02-06 13:00:09,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-06 13:00:09,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:09,508 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 13:00:09,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:09,508 INFO L85 PathProgramCache]: Analyzing trace with hash 766297795, now seen corresponding path program 3 times [2025-02-06 13:00:09,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:00:09,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937487799] [2025-02-06 13:00:09,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:00:09,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:09,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:09,511 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:09,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-06 13:00:09,721 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 12 equivalence classes.