./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test13.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/ldv-memsafety/memleaks_test13.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 e403b28035008257649d82a96310933a0e656461d578ec0892b41718c92e86af --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 10:22:38,909 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 10:22:38,974 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 10:22:38,984 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 10:22:38,984 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 10:22:39,013 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 10:22:39,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 10:22:39,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 10:22:39,015 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 10:22:39,015 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 10:22:39,016 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 10:22:39,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 10:22:39,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 10:22:39,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 10:22:39,017 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 10:22:39,017 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 10:22:39,017 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 10:22:39,017 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 10:22:39,017 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 10:22:39,018 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 10:22:39,018 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 10:22:39,018 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 10:22:39,018 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 10:22:39,018 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 10:22:39,018 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 10:22:39,018 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 10:22:39,019 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 10:22:39,019 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 10:22:39,019 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 10:22:39,019 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 10:22:39,019 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 10:22:39,020 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 10:22:39,020 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 10:22:39,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 10:22:39,020 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 10:22:39,020 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 10:22:39,020 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 10:22:39,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 10:22:39,021 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 10:22:39,021 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 10:22:39,021 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 10:22:39,021 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 10:22:39,021 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 -> e403b28035008257649d82a96310933a0e656461d578ec0892b41718c92e86af [2025-02-06 10:22:39,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 10:22:39,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 10:22:39,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 10:22:39,294 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 10:22:39,294 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 10:22:39,295 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test13.i [2025-02-06 10:22:40,594 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fc62386b4/7912a090b0a3477b88f51a405d5f5ae8/FLAGebcac29ae [2025-02-06 10:22:40,925 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 10:22:40,925 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test13.i [2025-02-06 10:22:40,938 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fc62386b4/7912a090b0a3477b88f51a405d5f5ae8/FLAGebcac29ae [2025-02-06 10:22:40,953 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fc62386b4/7912a090b0a3477b88f51a405d5f5ae8 [2025-02-06 10:22:40,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 10:22:40,956 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 10:22:40,957 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 10:22:40,957 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 10:22:40,961 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 10:22:40,961 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 10:22:40" (1/1) ... [2025-02-06 10:22:40,962 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@153a86e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:40, skipping insertion in model container [2025-02-06 10:22:40,963 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 10:22:40" (1/1) ... [2025-02-06 10:22:41,004 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 10:22:41,259 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 10:22:41,297 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 10:22:41,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 10:22:41,324 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 10:22:41,324 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5348d2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:41, skipping insertion in model container [2025-02-06 10:22:41,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 10:22:41,325 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-02-06 10:22:41,326 INFO L158 Benchmark]: Toolchain (without parser) took 369.29ms. Allocated memory is still 142.6MB. Free memory was 103.8MB in the beginning and 89.3MB in the end (delta: 14.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 10:22:41,327 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 125.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 10:22:41,327 INFO L158 Benchmark]: CACSL2BoogieTranslator took 367.37ms. Allocated memory is still 142.6MB. Free memory was 103.8MB in the beginning and 89.3MB in the end (delta: 14.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 10:22:41,328 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 125.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 367.37ms. Allocated memory is still 142.6MB. Free memory was 103.8MB in the beginning and 89.3MB in the end (delta: 14.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 607]: 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/ldv-memsafety/memleaks_test13.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 e403b28035008257649d82a96310933a0e656461d578ec0892b41718c92e86af --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 10:22:43,350 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 10:22:43,453 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-02-06 10:22:43,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 10:22:43,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 10:22:43,492 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 10:22:43,494 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 10:22:43,494 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 10:22:43,495 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 10:22:43,495 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 10:22:43,495 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 10:22:43,496 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 10:22:43,496 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 10:22:43,496 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 10:22:43,496 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 10:22:43,497 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 10:22:43,497 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 10:22:43,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 10:22:43,497 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 10:22:43,497 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 10:22:43,497 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 10:22:43,497 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 10:22:43,498 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 10:22:43,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 10:22:43,498 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 10:22:43,498 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-02-06 10:22:43,498 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-02-06 10:22:43,498 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 10:22:43,498 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 10:22:43,499 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 10:22:43,499 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 10:22:43,499 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 10:22:43,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 10:22:43,500 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 10:22:43,500 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 10:22:43,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 10:22:43,500 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 10:22:43,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 10:22:43,500 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-02-06 10:22:43,500 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-02-06 10:22:43,500 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 10:22:43,500 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 10:22:43,500 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 10:22:43,501 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 10:22:43,501 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 -> e403b28035008257649d82a96310933a0e656461d578ec0892b41718c92e86af [2025-02-06 10:22:43,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 10:22:43,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 10:22:43,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 10:22:43,784 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 10:22:43,785 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 10:22:43,787 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test13.i [2025-02-06 10:22:45,119 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/54486f989/9b3c608c689745e79828f21b62988bc9/FLAG0ad34c647 [2025-02-06 10:22:45,457 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 10:22:45,460 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test13.i [2025-02-06 10:22:45,477 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/54486f989/9b3c608c689745e79828f21b62988bc9/FLAG0ad34c647 [2025-02-06 10:22:45,496 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/54486f989/9b3c608c689745e79828f21b62988bc9 [2025-02-06 10:22:45,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 10:22:45,501 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 10:22:45,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 10:22:45,502 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 10:22:45,506 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 10:22:45,507 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 10:22:45" (1/1) ... [2025-02-06 10:22:45,509 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4af3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:45, skipping insertion in model container [2025-02-06 10:22:45,510 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 10:22:45" (1/1) ... [2025-02-06 10:22:45,550 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 10:22:45,885 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 10:22:45,955 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 10:22:45,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 10:22:45,985 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-02-06 10:22:45,993 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 10:22:46,030 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 10:22:46,047 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 10:22:46,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 10:22:46,061 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 10:22:46,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 10:22:46,171 INFO L204 MainTranslator]: Completed translation [2025-02-06 10:22:46,172 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46 WrapperNode [2025-02-06 10:22:46,172 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 10:22:46,172 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 10:22:46,172 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 10:22:46,173 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 10:22:46,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,195 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,216 INFO L138 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 21, calls inlined = 6, statements flattened = 62 [2025-02-06 10:22:46,216 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 10:22:46,218 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 10:22:46,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 10:22:46,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 10:22:46,225 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,231 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,252 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 2]. The 8 writes are split as follows [0, 8]. [2025-02-06 10:22:46,253 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,253 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,262 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,265 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,267 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 10:22:46,274 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 10:22:46,274 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 10:22:46,274 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 10:22:46,275 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (1/1) ... [2025-02-06 10:22:46,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 10:22:46,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:46,308 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 10:22:46,314 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 10:22:46,335 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2025-02-06 10:22:46,336 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2025-02-06 10:22:46,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2025-02-06 10:22:46,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2025-02-06 10:22:46,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2025-02-06 10:22:46,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2025-02-06 10:22:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 10:22:46,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 10:22:46,470 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 10:22:46,472 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 10:22:46,758 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L527: havoc #t~malloc12.base, #t~malloc12.offset; [2025-02-06 10:22:46,895 INFO L? ?]: Removed 76 outVars from TransFormulas that were not future-live. [2025-02-06 10:22:46,896 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 10:22:46,911 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 10:22:46,912 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 10:22:46,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 10:22:46 BoogieIcfgContainer [2025-02-06 10:22:46,913 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 10:22:46,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 10:22:46,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 10:22:46,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 10:22:46,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 10:22:45" (1/3) ... [2025-02-06 10:22:46,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0ffb2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 10:22:46, skipping insertion in model container [2025-02-06 10:22:46,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:22:46" (2/3) ... [2025-02-06 10:22:46,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0ffb2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 10:22:46, skipping insertion in model container [2025-02-06 10:22:46,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 10:22:46" (3/3) ... [2025-02-06 10:22:46,922 INFO L128 eAbstractionObserver]: Analyzing ICFG memleaks_test13.i [2025-02-06 10:22:46,934 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 10:22:46,935 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test13.i that has 6 procedures, 87 locations, 1 initial locations, 1 loop locations, and 32 error locations. [2025-02-06 10:22:46,969 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 10:22:46,979 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;@5b12a8a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 10:22:46,979 INFO L334 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2025-02-06 10:22:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 77 states have internal predecessors, (79), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-06 10:22:46,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-06 10:22:46,992 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:46,992 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:46,994 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:46,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash 425386995, now seen corresponding path program 1 times [2025-02-06 10:22:47,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:47,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025638364] [2025-02-06 10:22:47,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:47,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:47,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:47,011 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 10:22:47,012 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 10:22:47,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 10:22:47,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 10:22:47,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:47,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:47,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 10:22:47,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:47,397 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-02-06 10:22:47,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-02-06 10:22:47,479 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 10:22:47,481 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:47,482 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:47,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025638364] [2025-02-06 10:22:47,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025638364] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:47,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:47,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 10:22:47,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973857494] [2025-02-06 10:22:47,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:47,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 10:22:47,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:47,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 10:22:47,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-06 10:22:47,510 INFO L87 Difference]: Start difference. First operand has 87 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 77 states have internal predecessors, (79), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:48,194 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2025-02-06 10:22:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 10:22:48,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-02-06 10:22:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:48,202 INFO L225 Difference]: With dead ends: 128 [2025-02-06 10:22:48,203 INFO L226 Difference]: Without dead ends: 124 [2025-02-06 10:22:48,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-02-06 10:22:48,206 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:48,206 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 127 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-06 10:22:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-02-06 10:22:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 83. [2025-02-06 10:22:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 43 states have (on average 1.744186046511628) internal successors, (75), 73 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-06 10:22:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2025-02-06 10:22:48,241 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 12 [2025-02-06 10:22:48,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:48,242 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2025-02-06 10:22:48,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:48,242 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2025-02-06 10:22:48,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-06 10:22:48,242 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:48,242 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:48,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 10:22:48,443 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 10:22:48,443 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:48,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 425386996, now seen corresponding path program 1 times [2025-02-06 10:22:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:48,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108420352] [2025-02-06 10:22:48,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:48,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:48,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:48,448 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 10:22:48,449 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 10:22:48,498 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 10:22:48,513 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 10:22:48,514 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:48,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:48,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 10:22:48,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:48,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:22:48,707 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 10:22:48,804 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 10:22:48,804 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:48,804 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:48,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108420352] [2025-02-06 10:22:48,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108420352] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:48,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:48,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 10:22:48,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776930438] [2025-02-06 10:22:48,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:48,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 10:22:48,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:48,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 10:22:48,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-06 10:22:48,806 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:49,581 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2025-02-06 10:22:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 10:22:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-02-06 10:22:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:49,584 INFO L225 Difference]: With dead ends: 122 [2025-02-06 10:22:49,584 INFO L226 Difference]: Without dead ends: 122 [2025-02-06 10:22:49,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2025-02-06 10:22:49,586 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 187 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:49,586 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 97 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-06 10:22:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-02-06 10:22:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 81. [2025-02-06 10:22:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 43 states have (on average 1.697674418604651) internal successors, (73), 71 states have internal predecessors, (73), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-06 10:22:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2025-02-06 10:22:49,602 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 12 [2025-02-06 10:22:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:49,602 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2025-02-06 10:22:49,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2025-02-06 10:22:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-06 10:22:49,603 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:49,603 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:49,611 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 10:22:49,804 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 10:22:49,804 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __ldv_list_addErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:49,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:49,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1744469183, now seen corresponding path program 1 times [2025-02-06 10:22:49,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:49,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011850142] [2025-02-06 10:22:49,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:49,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:49,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:49,809 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 10:22:49,811 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 10:22:49,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 10:22:49,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 10:22:49,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:49,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:49,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 10:22:49,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:49,926 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 15 treesize of output 7 [2025-02-06 10:22:49,964 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 10:22:49,964 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:49,965 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011850142] [2025-02-06 10:22:49,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011850142] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:49,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:49,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 10:22:49,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011479708] [2025-02-06 10:22:49,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:49,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 10:22:49,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:49,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 10:22:49,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-02-06 10:22:49,966 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:50,383 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2025-02-06 10:22:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 10:22:50,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-02-06 10:22:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:50,385 INFO L225 Difference]: With dead ends: 114 [2025-02-06 10:22:50,385 INFO L226 Difference]: Without dead ends: 114 [2025-02-06 10:22:50,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-02-06 10:22:50,386 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 57 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:50,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 322 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 10:22:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-02-06 10:22:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 80. [2025-02-06 10:22:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 70 states have internal predecessors, (72), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-06 10:22:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2025-02-06 10:22:50,402 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 15 [2025-02-06 10:22:50,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:50,402 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2025-02-06 10:22:50,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:50,403 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2025-02-06 10:22:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-06 10:22:50,404 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:50,404 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:50,411 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 10:22:50,605 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 10:22:50,605 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __ldv_list_addErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:50,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:50,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1744469182, now seen corresponding path program 1 times [2025-02-06 10:22:50,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:50,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987384204] [2025-02-06 10:22:50,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:50,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:50,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:50,609 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 10:22:50,610 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 10:22:50,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 10:22:50,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 10:22:50,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:50,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:50,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 10:22:50,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:22:50,895 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 10:22:51,135 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 10:22:51,135 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:51,135 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:51,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987384204] [2025-02-06 10:22:51,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987384204] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:51,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:51,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 10:22:51,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513518494] [2025-02-06 10:22:51,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:51,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 10:22:51,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:51,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 10:22:51,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2025-02-06 10:22:51,137 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:52,179 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2025-02-06 10:22:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 10:22:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-02-06 10:22:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:52,180 INFO L225 Difference]: With dead ends: 110 [2025-02-06 10:22:52,181 INFO L226 Difference]: Without dead ends: 110 [2025-02-06 10:22:52,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2025-02-06 10:22:52,182 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 122 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:52,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 249 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-06 10:22:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-02-06 10:22:52,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2025-02-06 10:22:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 69 states have internal predecessors, (71), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-06 10:22:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2025-02-06 10:22:52,188 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 15 [2025-02-06 10:22:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:52,188 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2025-02-06 10:22:52,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:52,189 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2025-02-06 10:22:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-06 10:22:52,189 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:52,189 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:52,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 10:22:52,390 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 10:22:52,390 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:52,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:52,391 INFO L85 PathProgramCache]: Analyzing trace with hash 302639170, now seen corresponding path program 1 times [2025-02-06 10:22:52,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:52,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545056599] [2025-02-06 10:22:52,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:52,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:52,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:52,393 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 10:22:52,394 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 10:22:52,443 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 10:22:52,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 10:22:52,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:52,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:52,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 10:22:52,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:52,472 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 10:22:52,472 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:52,472 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:52,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545056599] [2025-02-06 10:22:52,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545056599] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:52,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:52,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 10:22:52,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061385913] [2025-02-06 10:22:52,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:52,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 10:22:52,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:52,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 10:22:52,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:22:52,473 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:52,494 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2025-02-06 10:22:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 10:22:52,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-02-06 10:22:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:52,496 INFO L225 Difference]: With dead ends: 85 [2025-02-06 10:22:52,496 INFO L226 Difference]: Without dead ends: 85 [2025-02-06 10:22:52,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:22:52,496 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 1 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:52,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 311 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 10:22:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-06 10:22:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2025-02-06 10:22:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 46 states have (on average 1.608695652173913) internal successors, (74), 72 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-06 10:22:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2025-02-06 10:22:52,512 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 13 [2025-02-06 10:22:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:52,512 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2025-02-06 10:22:52,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2025-02-06 10:22:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-06 10:22:52,513 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:52,513 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:52,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 10:22:52,714 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 10:22:52,714 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:52,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:52,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1504815293, now seen corresponding path program 1 times [2025-02-06 10:22:52,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:52,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064486446] [2025-02-06 10:22:52,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:52,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:52,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:52,716 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 10:22:52,717 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 10:22:52,755 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 10:22:52,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 10:22:52,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:52,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:52,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 10:22:52,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:52,795 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 15 treesize of output 7 [2025-02-06 10:22:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:22:52,809 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:52,809 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064486446] [2025-02-06 10:22:52,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064486446] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:52,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:52,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 10:22:52,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482092457] [2025-02-06 10:22:52,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:52,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 10:22:52,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:52,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 10:22:52,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:22:52,811 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:53,020 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2025-02-06 10:22:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 10:22:53,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-02-06 10:22:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:53,022 INFO L225 Difference]: With dead ends: 122 [2025-02-06 10:22:53,022 INFO L226 Difference]: Without dead ends: 122 [2025-02-06 10:22:53,022 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-06 10:22:53,023 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 43 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:53,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 181 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:22:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-02-06 10:22:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2025-02-06 10:22:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.5925925925925926) internal successors, (86), 79 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-02-06 10:22:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2025-02-06 10:22:53,031 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 13 [2025-02-06 10:22:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:53,031 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2025-02-06 10:22:53,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2025-02-06 10:22:53,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-06 10:22:53,032 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:53,032 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:53,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 10:22:53,233 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 10:22:53,233 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:53,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:53,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1504815292, now seen corresponding path program 1 times [2025-02-06 10:22:53,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:53,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704207681] [2025-02-06 10:22:53,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:53,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:53,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:53,236 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 10:22:53,237 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 10:22:53,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 10:22:53,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 10:22:53,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:53,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:53,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 10:22:53,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:53,513 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 10:22:53,514 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:53,514 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:53,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704207681] [2025-02-06 10:22:53,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704207681] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:53,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:53,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 10:22:53,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125311896] [2025-02-06 10:22:53,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:53,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 10:22:53,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:53,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 10:22:53,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 10:22:53,516 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:53,955 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2025-02-06 10:22:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 10:22:53,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-02-06 10:22:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:53,957 INFO L225 Difference]: With dead ends: 109 [2025-02-06 10:22:53,957 INFO L226 Difference]: Without dead ends: 109 [2025-02-06 10:22:53,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-02-06 10:22:53,958 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 31 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:53,958 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 223 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-06 10:22:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-02-06 10:22:53,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2025-02-06 10:22:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 81 states have internal predecessors, (87), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-02-06 10:22:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2025-02-06 10:22:53,964 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 13 [2025-02-06 10:22:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:53,964 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2025-02-06 10:22:53,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2025-02-06 10:22:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-06 10:22:53,964 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:53,965 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:53,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 10:22:54,169 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 10:22:54,169 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __ldv_list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:54,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:54,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1756030182, now seen corresponding path program 1 times [2025-02-06 10:22:54,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:54,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575691001] [2025-02-06 10:22:54,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:54,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:54,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:54,172 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 10:22:54,173 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 10:22:54,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 10:22:54,225 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 10:22:54,225 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:54,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:54,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 10:22:54,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:54,235 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 10:22:54,303 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 10:22:54,304 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:54,304 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:54,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575691001] [2025-02-06 10:22:54,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575691001] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:54,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:54,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 10:22:54,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594777464] [2025-02-06 10:22:54,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:54,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 10:22:54,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:54,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 10:22:54,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-02-06 10:22:54,305 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:54,639 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2025-02-06 10:22:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 10:22:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2025-02-06 10:22:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:54,640 INFO L225 Difference]: With dead ends: 112 [2025-02-06 10:22:54,640 INFO L226 Difference]: Without dead ends: 112 [2025-02-06 10:22:54,641 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-02-06 10:22:54,641 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 23 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:54,641 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 345 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 10:22:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-02-06 10:22:54,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2025-02-06 10:22:54,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 91 states have internal predecessors, (100), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2025-02-06 10:22:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2025-02-06 10:22:54,653 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 16 [2025-02-06 10:22:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:54,653 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2025-02-06 10:22:54,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2025-02-06 10:22:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-06 10:22:54,654 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:54,654 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:54,662 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 10:22:54,854 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 10:22:54,855 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __ldv_list_addErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:54,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:54,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1756030183, now seen corresponding path program 1 times [2025-02-06 10:22:54,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:54,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110548031] [2025-02-06 10:22:54,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:54,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:54,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:54,857 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 10:22:54,858 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 10:22:54,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 10:22:54,914 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 10:22:54,914 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:54,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:54,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 10:22:54,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:54,929 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 10:22:55,062 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 10:22:55,062 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:55,062 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:55,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110548031] [2025-02-06 10:22:55,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110548031] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:55,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:55,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 10:22:55,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73596515] [2025-02-06 10:22:55,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:55,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 10:22:55,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:55,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 10:22:55,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2025-02-06 10:22:55,063 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:55,448 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2025-02-06 10:22:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 10:22:55,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2025-02-06 10:22:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:55,450 INFO L225 Difference]: With dead ends: 110 [2025-02-06 10:22:55,450 INFO L226 Difference]: Without dead ends: 110 [2025-02-06 10:22:55,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2025-02-06 10:22:55,450 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 20 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:55,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 445 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 10:22:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-02-06 10:22:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2025-02-06 10:22:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 91 states have internal predecessors, (98), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2025-02-06 10:22:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2025-02-06 10:22:55,455 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 16 [2025-02-06 10:22:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:55,455 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2025-02-06 10:22:55,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2025-02-06 10:22:55,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-06 10:22:55,455 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:55,455 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:55,464 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 10:22:55,656 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 10:22:55,656 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __ldv_list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:55,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1885112901, now seen corresponding path program 1 times [2025-02-06 10:22:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:55,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790533229] [2025-02-06 10:22:55,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:55,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:55,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:55,659 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 10:22:55,659 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 10:22:55,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 10:22:55,716 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 10:22:55,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:55,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:55,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 10:22:55,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:55,754 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 10:22:55,754 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:55,754 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790533229] [2025-02-06 10:22:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790533229] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:55,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:55,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 10:22:55,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849663096] [2025-02-06 10:22:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:55,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 10:22:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:55,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 10:22:55,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:22:55,755 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:55,770 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2025-02-06 10:22:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 10:22:55,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2025-02-06 10:22:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:55,771 INFO L225 Difference]: With dead ends: 90 [2025-02-06 10:22:55,771 INFO L226 Difference]: Without dead ends: 90 [2025-02-06 10:22:55,772 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:22:55,772 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:55,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 301 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 10:22:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-02-06 10:22:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2025-02-06 10:22:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 77 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-02-06 10:22:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2025-02-06 10:22:55,775 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 16 [2025-02-06 10:22:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:55,776 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2025-02-06 10:22:55,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2025-02-06 10:22:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-06 10:22:55,776 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:55,776 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:55,783 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 10:22:55,976 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 10:22:55,977 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:55,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:55,977 INFO L85 PathProgramCache]: Analyzing trace with hash -377142301, now seen corresponding path program 1 times [2025-02-06 10:22:55,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:55,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885914134] [2025-02-06 10:22:55,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:55,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:55,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:55,979 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 10:22:55,980 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 10:22:56,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 10:22:56,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 10:22:56,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:56,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:56,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 10:22:56,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:56,076 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 10:22:56,076 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:56,076 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:56,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885914134] [2025-02-06 10:22:56,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885914134] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:56,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:56,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 10:22:56,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526315074] [2025-02-06 10:22:56,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:56,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 10:22:56,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:56,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 10:22:56,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:22:56,078 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:56,193 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2025-02-06 10:22:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 10:22:56,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2025-02-06 10:22:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:56,194 INFO L225 Difference]: With dead ends: 89 [2025-02-06 10:22:56,194 INFO L226 Difference]: Without dead ends: 89 [2025-02-06 10:22:56,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 10:22:56,195 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 9 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:56,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:22:56,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-02-06 10:22:56,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2025-02-06 10:22:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 76 states have internal predecessors, (81), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-02-06 10:22:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2025-02-06 10:22:56,198 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 18 [2025-02-06 10:22:56,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:56,198 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2025-02-06 10:22:56,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2025-02-06 10:22:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-06 10:22:56,199 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:56,199 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:56,206 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 10:22:56,403 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 10:22:56,403 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:56,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash -377142300, now seen corresponding path program 1 times [2025-02-06 10:22:56,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:56,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287452007] [2025-02-06 10:22:56,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:56,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:56,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:56,407 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 10:22:56,408 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 10:22:56,457 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 10:22:56,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 10:22:56,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:56,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:56,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 10:22:56,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:56,601 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 7 treesize of output 3 [2025-02-06 10:22:56,608 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 15 treesize of output 7 [2025-02-06 10:22:56,697 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 10:22:56,697 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:56,697 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:56,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287452007] [2025-02-06 10:22:56,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287452007] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:56,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:56,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 10:22:56,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174982070] [2025-02-06 10:22:56,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:56,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 10:22:56,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:56,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 10:22:56,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-02-06 10:22:56,698 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:57,094 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2025-02-06 10:22:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 10:22:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2025-02-06 10:22:57,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:57,095 INFO L225 Difference]: With dead ends: 97 [2025-02-06 10:22:57,095 INFO L226 Difference]: Without dead ends: 97 [2025-02-06 10:22:57,096 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-02-06 10:22:57,096 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:57,096 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 426 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:22:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-02-06 10:22:57,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2025-02-06 10:22:57,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 75 states have internal predecessors, (80), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-02-06 10:22:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2025-02-06 10:22:57,102 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 18 [2025-02-06 10:22:57,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:57,103 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2025-02-06 10:22:57,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2025-02-06 10:22:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-06 10:22:57,104 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:57,104 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:57,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 10:22:57,306 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 10:22:57,307 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:57,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:57,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1927290112, now seen corresponding path program 1 times [2025-02-06 10:22:57,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:57,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581937897] [2025-02-06 10:22:57,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:57,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:57,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:57,309 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 10:22:57,310 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 10:22:57,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 10:22:57,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 10:22:57,366 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:57,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:57,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 10:22:57,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:57,400 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 10:22:57,400 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:57,400 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581937897] [2025-02-06 10:22:57,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581937897] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:57,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:57,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 10:22:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224195116] [2025-02-06 10:22:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:57,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 10:22:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:57,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 10:22:57,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:22:57,401 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:57,560 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2025-02-06 10:22:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 10:22:57,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2025-02-06 10:22:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:57,562 INFO L225 Difference]: With dead ends: 118 [2025-02-06 10:22:57,562 INFO L226 Difference]: Without dead ends: 118 [2025-02-06 10:22:57,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-02-06 10:22:57,562 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 65 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:57,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 132 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:22:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-02-06 10:22:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2025-02-06 10:22:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 88 states have internal predecessors, (102), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-02-06 10:22:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2025-02-06 10:22:57,569 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 19 [2025-02-06 10:22:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:57,569 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2025-02-06 10:22:57,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2025-02-06 10:22:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-06 10:22:57,570 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:57,570 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:57,578 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 10:22:57,770 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 10:22:57,771 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:57,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:57,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1927290111, now seen corresponding path program 1 times [2025-02-06 10:22:57,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:57,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511824845] [2025-02-06 10:22:57,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:57,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:57,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:57,773 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 10:22:57,774 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 10:22:57,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 10:22:57,829 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 10:22:57,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:57,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:57,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 10:22:57,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:57,985 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 10:22:57,985 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:57,985 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:57,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511824845] [2025-02-06 10:22:57,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511824845] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:57,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:57,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 10:22:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112108021] [2025-02-06 10:22:57,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:57,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 10:22:57,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:57,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 10:22:57,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 10:22:57,986 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:58,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:58,188 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2025-02-06 10:22:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 10:22:58,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2025-02-06 10:22:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:58,189 INFO L225 Difference]: With dead ends: 113 [2025-02-06 10:22:58,189 INFO L226 Difference]: Without dead ends: 113 [2025-02-06 10:22:58,189 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-02-06 10:22:58,190 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 20 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:58,190 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 222 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:22:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-02-06 10:22:58,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2025-02-06 10:22:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.445945945945946) internal successors, (107), 94 states have internal predecessors, (107), 8 states have call successors, (8), 8 states have call predecessors, (8), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2025-02-06 10:22:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2025-02-06 10:22:58,193 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 19 [2025-02-06 10:22:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:58,193 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2025-02-06 10:22:58,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-06 10:22:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2025-02-06 10:22:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-06 10:22:58,194 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:58,194 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:58,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-06 10:22:58,394 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 10:22:58,395 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:58,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash 688617201, now seen corresponding path program 1 times [2025-02-06 10:22:58,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:58,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987930474] [2025-02-06 10:22:58,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:58,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:58,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:58,397 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 10:22:58,398 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 10:22:58,444 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 10:22:58,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 10:22:58,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:58,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:58,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 10:22:58,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:58,490 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 10:22:58,490 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:58,490 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:58,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987930474] [2025-02-06 10:22:58,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987930474] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:58,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:58,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 10:22:58,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331481029] [2025-02-06 10:22:58,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:58,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 10:22:58,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:58,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 10:22:58,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:22:58,491 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-06 10:22:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:58,619 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2025-02-06 10:22:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 10:22:58,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2025-02-06 10:22:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:58,620 INFO L225 Difference]: With dead ends: 112 [2025-02-06 10:22:58,620 INFO L226 Difference]: Without dead ends: 93 [2025-02-06 10:22:58,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:22:58,620 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:58,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 79 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:22:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-02-06 10:22:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-02-06 10:22:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 79 states have internal predecessors, (92), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-06 10:22:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2025-02-06 10:22:58,625 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 24 [2025-02-06 10:22:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:58,625 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2025-02-06 10:22:58,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-06 10:22:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2025-02-06 10:22:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-06 10:22:58,625 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:58,625 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:58,633 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 10:22:58,826 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 10:22:58,826 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:22:58,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:22:58,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1315262149, now seen corresponding path program 1 times [2025-02-06 10:22:58,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:22:58,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623101243] [2025-02-06 10:22:58,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:22:58,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:22:58,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:22:58,829 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 10:22:58,832 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 10:22:58,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 10:22:58,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 10:22:58,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:22:58,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:22:58,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 10:22:58,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:22:58,908 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 10:22:59,036 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 10:22:59,122 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 10:22:59,161 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 10:22:59,162 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:22:59,162 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:22:59,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623101243] [2025-02-06 10:22:59,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623101243] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:22:59,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:22:59,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-02-06 10:22:59,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685061363] [2025-02-06 10:22:59,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:22:59,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 10:22:59,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:22:59,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 10:22:59,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2025-02-06 10:22:59,163 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:22:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:22:59,917 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2025-02-06 10:22:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 10:22:59,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2025-02-06 10:22:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:22:59,918 INFO L225 Difference]: With dead ends: 104 [2025-02-06 10:22:59,918 INFO L226 Difference]: Without dead ends: 104 [2025-02-06 10:22:59,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2025-02-06 10:22:59,919 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 83 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-06 10:22:59,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 284 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-06 10:22:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-02-06 10:22:59,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2025-02-06 10:22:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 78 states have internal predecessors, (91), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-06 10:22:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2025-02-06 10:22:59,925 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 27 [2025-02-06 10:22:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:22:59,926 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2025-02-06 10:22:59,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:22:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2025-02-06 10:22:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-06 10:22:59,926 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:22:59,926 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:22:59,935 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 10:23:00,127 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 10:23:00,127 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:00,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1315262150, now seen corresponding path program 1 times [2025-02-06 10:23:00,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:00,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124529772] [2025-02-06 10:23:00,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:00,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:00,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:00,131 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 10:23:00,133 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 10:23:00,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 10:23:00,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 10:23:00,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:00,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:00,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-06 10:23:00,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:00,227 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 10:23:00,485 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 10:23:00,496 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 10:23:00,736 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 10:23:00,829 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 10:23:00,829 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:00,830 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:00,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124529772] [2025-02-06 10:23:00,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124529772] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:00,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:00,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-02-06 10:23:00,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281303029] [2025-02-06 10:23:00,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:00,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 10:23:00,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:00,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 10:23:00,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2025-02-06 10:23:00,833 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:01,840 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2025-02-06 10:23:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-06 10:23:01,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2025-02-06 10:23:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:01,842 INFO L225 Difference]: With dead ends: 98 [2025-02-06 10:23:01,842 INFO L226 Difference]: Without dead ends: 98 [2025-02-06 10:23:01,842 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2025-02-06 10:23:01,843 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 89 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:01,843 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 364 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-06 10:23:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-02-06 10:23:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2025-02-06 10:23:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 77 states have internal predecessors, (89), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-06 10:23:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2025-02-06 10:23:01,846 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 27 [2025-02-06 10:23:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:01,847 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2025-02-06 10:23:01,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2025-02-06 10:23:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-06 10:23:01,847 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:01,848 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:01,857 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 10:23:02,048 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 10:23:02,048 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:02,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:02,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1427037237, now seen corresponding path program 1 times [2025-02-06 10:23:02,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:02,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569536994] [2025-02-06 10:23:02,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:02,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:02,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:02,051 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 10:23:02,052 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 10:23:02,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 10:23:02,131 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 10:23:02,131 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:02,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:02,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 10:23:02,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:02,154 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 10:23:02,154 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:02,154 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569536994] [2025-02-06 10:23:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569536994] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:02,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:02,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 10:23:02,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889315637] [2025-02-06 10:23:02,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:02,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 10:23:02,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:02,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 10:23:02,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:23:02,155 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-06 10:23:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:02,269 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2025-02-06 10:23:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 10:23:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2025-02-06 10:23:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:02,270 INFO L225 Difference]: With dead ends: 96 [2025-02-06 10:23:02,270 INFO L226 Difference]: Without dead ends: 96 [2025-02-06 10:23:02,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 10:23:02,270 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 17 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:02,270 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 157 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:23:02,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-02-06 10:23:02,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2025-02-06 10:23:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 76 states have internal predecessors, (86), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-06 10:23:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2025-02-06 10:23:02,273 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 32 [2025-02-06 10:23:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:02,273 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2025-02-06 10:23:02,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-06 10:23:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2025-02-06 10:23:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-06 10:23:02,274 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:02,274 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:02,282 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 10:23:02,474 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 10:23:02,475 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:02,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1427037238, now seen corresponding path program 1 times [2025-02-06 10:23:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:02,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538591622] [2025-02-06 10:23:02,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:02,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:02,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:02,477 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 10:23:02,478 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 10:23:02,532 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 10:23:02,558 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 10:23:02,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:02,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:02,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-06 10:23:02,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:02,569 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 10:23:02,759 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 10:23:02,765 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 10:23:02,879 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 10:23:03,023 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 10:23:03,023 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:03,023 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:03,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538591622] [2025-02-06 10:23:03,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538591622] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:03,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:03,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2025-02-06 10:23:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735165271] [2025-02-06 10:23:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:03,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 10:23:03,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:03,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 10:23:03,024 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2025-02-06 10:23:03,024 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:03,891 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2025-02-06 10:23:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 10:23:03,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2025-02-06 10:23:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:03,892 INFO L225 Difference]: With dead ends: 95 [2025-02-06 10:23:03,892 INFO L226 Difference]: Without dead ends: 95 [2025-02-06 10:23:03,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2025-02-06 10:23:03,893 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:03,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 381 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-06 10:23:03,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-02-06 10:23:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2025-02-06 10:23:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.4) internal successors, (84), 76 states have internal predecessors, (84), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-06 10:23:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2025-02-06 10:23:03,896 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 32 [2025-02-06 10:23:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:03,897 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2025-02-06 10:23:03,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2025-02-06 10:23:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-06 10:23:03,897 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:03,898 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:03,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 10:23:04,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:04,098 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:04,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1288417539, now seen corresponding path program 1 times [2025-02-06 10:23:04,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:04,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11861774] [2025-02-06 10:23:04,099 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:04,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:04,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:04,101 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 10:23:04,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-06 10:23:04,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-06 10:23:04,176 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-06 10:23:04,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:04,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:04,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-06 10:23:04,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:04,217 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 10:23:04,217 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 10:23:04,327 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 10:23:04,407 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 16 treesize of output 8 [2025-02-06 10:23:04,446 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 10:23:04,446 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:04,446 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:04,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11861774] [2025-02-06 10:23:04,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11861774] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:04,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:04,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-02-06 10:23:04,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898726105] [2025-02-06 10:23:04,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:04,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 10:23:04,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:04,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 10:23:04,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2025-02-06 10:23:04,447 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:05,181 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2025-02-06 10:23:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 10:23:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2025-02-06 10:23:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:05,183 INFO L225 Difference]: With dead ends: 126 [2025-02-06 10:23:05,183 INFO L226 Difference]: Without dead ends: 126 [2025-02-06 10:23:05,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2025-02-06 10:23:05,184 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 162 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:05,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 122 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-06 10:23:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2025-02-06 10:23:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 83. [2025-02-06 10:23:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 70 states have internal predecessors, (76), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-06 10:23:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2025-02-06 10:23:05,188 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 33 [2025-02-06 10:23:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:05,189 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2025-02-06 10:23:05,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:05,189 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2025-02-06 10:23:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-06 10:23:05,189 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:05,189 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:05,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-06 10:23:05,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:05,390 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_list_delErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:05,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:05,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1280024673, now seen corresponding path program 1 times [2025-02-06 10:23:05,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:05,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134881323] [2025-02-06 10:23:05,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:05,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:05,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:05,393 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 10:23:05,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-06 10:23:05,452 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-06 10:23:05,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-06 10:23:05,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:05,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:05,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-02-06 10:23:05,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:05,568 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 10:23:05,629 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 10:23:05,629 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 10:23:06,066 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 10:23:06,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:23:06,191 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 21 treesize of output 20 [2025-02-06 10:23:06,412 INFO L349 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2025-02-06 10:23:06,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 38 [2025-02-06 10:23:06,475 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 10:23:07,601 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 10:23:07,601 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:07,601 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:07,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134881323] [2025-02-06 10:23:07,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134881323] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:07,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:07,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2025-02-06 10:23:07,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23801350] [2025-02-06 10:23:07,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:07,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 10:23:07,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:07,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 10:23:07,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2025-02-06 10:23:07,602 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:09,760 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2025-02-06 10:23:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-06 10:23:09,761 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2025-02-06 10:23:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:09,761 INFO L225 Difference]: With dead ends: 86 [2025-02-06 10:23:09,761 INFO L226 Difference]: Without dead ends: 86 [2025-02-06 10:23:09,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2025-02-06 10:23:09,762 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:09,762 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 390 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-06 10:23:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-02-06 10:23:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2025-02-06 10:23:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 70 states have internal predecessors, (75), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-06 10:23:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2025-02-06 10:23:09,765 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 35 [2025-02-06 10:23:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:09,765 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2025-02-06 10:23:09,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2025-02-06 10:23:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-06 10:23:09,765 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:09,766 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:09,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-06 10:23:09,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:09,966 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_list_delErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:09,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1280024674, now seen corresponding path program 1 times [2025-02-06 10:23:09,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:09,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481027634] [2025-02-06 10:23:09,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:09,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:09,969 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 10:23:09,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-06 10:23:10,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-06 10:23:10,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-06 10:23:10,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:10,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:10,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-02-06 10:23:10,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:10,226 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2025-02-06 10:23:10,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2025-02-06 10:23:10,251 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 10:23:10,251 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 10:23:10,659 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 10:23:10,671 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 10:23:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:23:10,814 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 21 treesize of output 20 [2025-02-06 10:23:10,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:23:10,832 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 21 treesize of output 20 [2025-02-06 10:23:11,807 INFO L349 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2025-02-06 10:23:11,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 62 [2025-02-06 10:23:11,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:23:11,868 INFO L349 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2025-02-06 10:23:11,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 38 [2025-02-06 10:23:13,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:23:13,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2025-02-06 10:23:13,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 10:23:13,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 15 [2025-02-06 10:23:13,262 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 10:23:13,262 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:13,262 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:13,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481027634] [2025-02-06 10:23:13,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481027634] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:13,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:13,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2025-02-06 10:23:13,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338720223] [2025-02-06 10:23:13,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:13,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 10:23:13,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:13,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 10:23:13,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2025-02-06 10:23:13,264 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:15,823 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2025-02-06 10:23:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-06 10:23:15,824 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2025-02-06 10:23:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:15,824 INFO L225 Difference]: With dead ends: 85 [2025-02-06 10:23:15,824 INFO L226 Difference]: Without dead ends: 85 [2025-02-06 10:23:15,825 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2025-02-06 10:23:15,828 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 79 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:15,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 436 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-02-06 10:23:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-06 10:23:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2025-02-06 10:23:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 70 states have internal predecessors, (74), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-06 10:23:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2025-02-06 10:23:15,831 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 35 [2025-02-06 10:23:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:15,831 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2025-02-06 10:23:15,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2025-02-06 10:23:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-06 10:23:15,831 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:15,831 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:15,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-06 10:23:16,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:16,032 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:16,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1026059185, now seen corresponding path program 1 times [2025-02-06 10:23:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:16,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112525508] [2025-02-06 10:23:16,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:16,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:16,035 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 10:23:16,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-06 10:23:16,106 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-06 10:23:16,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-06 10:23:16,140 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:16,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:16,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-06 10:23:16,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:16,196 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 10:23:16,232 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 10:23:16,232 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 10:23:16,551 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 13 treesize of output 9 [2025-02-06 10:23:16,682 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2025-02-06 10:23:16,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2025-02-06 10:23:16,699 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 10:23:17,088 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 7 treesize of output 3 [2025-02-06 10:23:17,453 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2025-02-06 10:23:17,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 25 [2025-02-06 10:23:17,608 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 10:23:17,609 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:17,609 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:17,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112525508] [2025-02-06 10:23:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112525508] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:17,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:17,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2025-02-06 10:23:17,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394075035] [2025-02-06 10:23:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:17,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 10:23:17,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:17,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 10:23:17,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2025-02-06 10:23:17,611 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:20,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-06 10:23:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:21,324 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2025-02-06 10:23:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-06 10:23:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2025-02-06 10:23:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:21,325 INFO L225 Difference]: With dead ends: 85 [2025-02-06 10:23:21,325 INFO L226 Difference]: Without dead ends: 85 [2025-02-06 10:23:21,326 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2025-02-06 10:23:21,326 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 147 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:21,326 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 208 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2025-02-06 10:23:21,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-06 10:23:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2025-02-06 10:23:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 70 states have internal predecessors, (73), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-06 10:23:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2025-02-06 10:23:21,329 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 36 [2025-02-06 10:23:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:21,329 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2025-02-06 10:23:21,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2025-02-06 10:23:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-06 10:23:21,330 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:21,330 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:21,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-06 10:23:21,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:21,532 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:21,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:21,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1026059186, now seen corresponding path program 1 times [2025-02-06 10:23:21,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:21,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838246630] [2025-02-06 10:23:21,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:21,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:21,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:21,535 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 10:23:21,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-06 10:23:21,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-06 10:23:21,624 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-06 10:23:21,624 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:21,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:21,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 71 conjuncts are in the unsatisfiable core [2025-02-06 10:23:21,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:21,779 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2025-02-06 10:23:21,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2025-02-06 10:23:21,797 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 10:23:21,797 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 10:23:22,202 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 13 treesize of output 9 [2025-02-06 10:23:22,214 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 13 treesize of output 9 [2025-02-06 10:23:22,374 INFO L349 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2025-02-06 10:23:22,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 46 [2025-02-06 10:23:23,119 INFO L349 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2025-02-06 10:23:23,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2025-02-06 10:23:24,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:23:24,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2025-02-06 10:23:24,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:23:24,058 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 10:23:24,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2025-02-06 10:23:24,248 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 10:23:24,248 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:24,248 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:24,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838246630] [2025-02-06 10:23:24,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838246630] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:24,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:24,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2025-02-06 10:23:24,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718591686] [2025-02-06 10:23:24,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:24,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 10:23:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:24,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 10:23:24,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2025-02-06 10:23:24,249 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:27,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:27,403 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2025-02-06 10:23:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-06 10:23:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2025-02-06 10:23:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:27,404 INFO L225 Difference]: With dead ends: 84 [2025-02-06 10:23:27,404 INFO L226 Difference]: Without dead ends: 84 [2025-02-06 10:23:27,404 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2025-02-06 10:23:27,404 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 135 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:27,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 240 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-02-06 10:23:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-06 10:23:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2025-02-06 10:23:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.309090909090909) internal successors, (72), 70 states have internal predecessors, (72), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-06 10:23:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2025-02-06 10:23:27,407 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 36 [2025-02-06 10:23:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:27,407 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2025-02-06 10:23:27,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 10:23:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2025-02-06 10:23:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-06 10:23:27,407 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:27,407 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:27,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-06 10:23:27,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:27,608 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:27,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2140782522, now seen corresponding path program 1 times [2025-02-06 10:23:27,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:27,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702055788] [2025-02-06 10:23:27,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:27,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:27,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:27,611 INFO L229 MonitoredProcess]: Starting monitored process 26 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 10:23:27,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-06 10:23:27,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-06 10:23:27,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-06 10:23:27,709 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:27,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:27,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 10:23:27,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:27,828 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 10:23:27,905 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 15 treesize of output 7 [2025-02-06 10:23:27,963 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 10:23:27,964 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:27,964 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:27,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702055788] [2025-02-06 10:23:27,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702055788] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:27,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:27,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-02-06 10:23:27,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763098291] [2025-02-06 10:23:27,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:27,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 10:23:27,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:27,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 10:23:27,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2025-02-06 10:23:27,965 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-06 10:23:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:28,471 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2025-02-06 10:23:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 10:23:28,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2025-02-06 10:23:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:28,472 INFO L225 Difference]: With dead ends: 83 [2025-02-06 10:23:28,472 INFO L226 Difference]: Without dead ends: 83 [2025-02-06 10:23:28,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2025-02-06 10:23:28,472 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:28,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 402 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-06 10:23:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-02-06 10:23:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-02-06 10:23:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.290909090909091) internal successors, (71), 70 states have internal predecessors, (71), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-06 10:23:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2025-02-06 10:23:28,474 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 41 [2025-02-06 10:23:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:28,474 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2025-02-06 10:23:28,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-06 10:23:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2025-02-06 10:23:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-06 10:23:28,475 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:28,475 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:28,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-02-06 10:23:28,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:28,676 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:28,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2669783, now seen corresponding path program 1 times [2025-02-06 10:23:28,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:28,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719206747] [2025-02-06 10:23:28,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:28,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:28,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:28,678 INFO L229 MonitoredProcess]: Starting monitored process 27 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 10:23:28,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-06 10:23:28,746 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-06 10:23:28,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 10:23:28,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:28,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:28,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-02-06 10:23:28,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:28,839 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 10:23:28,881 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 10:23:28,881 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 10:23:28,944 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 7 treesize of output 3 [2025-02-06 10:23:29,220 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 10:23:29,336 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 21 treesize of output 20 [2025-02-06 10:23:29,499 INFO L349 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2025-02-06 10:23:29,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 38 [2025-02-06 10:23:29,972 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 7 treesize of output 3 [2025-02-06 10:23:29,979 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-06 10:23:29,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 10:23:30,554 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2025-02-06 10:23:30,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 43 [2025-02-06 10:23:30,673 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 16 treesize of output 13 [2025-02-06 10:23:30,711 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 10:23:30,711 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:30,712 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:30,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719206747] [2025-02-06 10:23:30,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719206747] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:30,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:30,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2025-02-06 10:23:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69212056] [2025-02-06 10:23:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:30,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-06 10:23:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:30,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-06 10:23:30,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2025-02-06 10:23:30,713 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 23 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-06 10:23:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:34,314 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2025-02-06 10:23:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-02-06 10:23:34,315 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.25) internal successors, (35), 23 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2025-02-06 10:23:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:34,315 INFO L225 Difference]: With dead ends: 84 [2025-02-06 10:23:34,315 INFO L226 Difference]: Without dead ends: 84 [2025-02-06 10:23:34,316 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=266, Invalid=3038, Unknown=2, NotChecked=0, Total=3306 [2025-02-06 10:23:34,316 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 86 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 16 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:34,316 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 405 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1331 Invalid, 4 Unknown, 0 Unchecked, 2.1s Time] [2025-02-06 10:23:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-06 10:23:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2025-02-06 10:23:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 71 states have internal predecessors, (73), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-06 10:23:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2025-02-06 10:23:34,319 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 43 [2025-02-06 10:23:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:34,319 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2025-02-06 10:23:34,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.25) internal successors, (35), 23 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-06 10:23:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2025-02-06 10:23:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-06 10:23:34,319 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:34,319 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:34,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-02-06 10:23:34,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:34,520 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:34,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:34,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2669784, now seen corresponding path program 1 times [2025-02-06 10:23:34,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:34,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739091401] [2025-02-06 10:23:34,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:34,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:34,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:34,522 INFO L229 MonitoredProcess]: Starting monitored process 28 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 10:23:34,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-06 10:23:34,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-06 10:23:34,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 10:23:34,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:34,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:34,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 72 conjuncts are in the unsatisfiable core [2025-02-06 10:23:34,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:34,747 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 10:23:34,822 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 10:23:34,822 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 10:23:35,276 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 10:23:35,422 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 21 treesize of output 20 [2025-02-06 10:23:35,604 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 10:23:35,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 37 [2025-02-06 10:23:35,612 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 10:23:35,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2025-02-06 10:23:36,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2025-02-06 10:23:36,644 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 18 treesize of output 10 [2025-02-06 10:23:37,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 10:23:37,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 45 [2025-02-06 10:23:37,140 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2025-02-06 10:23:37,140 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 23 [2025-02-06 10:23:37,392 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 10:23:37,392 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:37,392 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:37,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739091401] [2025-02-06 10:23:37,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739091401] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:37,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:37,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2025-02-06 10:23:37,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109880864] [2025-02-06 10:23:37,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:37,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-06 10:23:37,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:37,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-06 10:23:37,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2025-02-06 10:23:37,393 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 29 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 22 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-06 10:23:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:41,305 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2025-02-06 10:23:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-06 10:23:41,306 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 22 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2025-02-06 10:23:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:41,306 INFO L225 Difference]: With dead ends: 84 [2025-02-06 10:23:41,306 INFO L226 Difference]: Without dead ends: 84 [2025-02-06 10:23:41,307 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=257, Invalid=2823, Unknown=0, NotChecked=0, Total=3080 [2025-02-06 10:23:41,307 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:41,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 430 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2025-02-06 10:23:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-06 10:23:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2025-02-06 10:23:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 71 states have internal predecessors, (72), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-06 10:23:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2025-02-06 10:23:41,311 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 43 [2025-02-06 10:23:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:41,312 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2025-02-06 10:23:41,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 22 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-06 10:23:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2025-02-06 10:23:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-06 10:23:41,312 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:41,312 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:41,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-06 10:23:41,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:41,513 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:41,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:41,513 INFO L85 PathProgramCache]: Analyzing trace with hash 406861782, now seen corresponding path program 1 times [2025-02-06 10:23:41,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:41,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519189858] [2025-02-06 10:23:41,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:41,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:41,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:41,515 INFO L229 MonitoredProcess]: Starting monitored process 29 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 10:23:41,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-02-06 10:23:41,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-06 10:23:41,617 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-06 10:23:41,617 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:41,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:41,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 10:23:41,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:23:41,650 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:41,650 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:41,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519189858] [2025-02-06 10:23:41,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519189858] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:41,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:41,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 10:23:41,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507317868] [2025-02-06 10:23:41,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:41,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 10:23:41,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:41,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 10:23:41,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 10:23:41,651 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-06 10:23:41,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:41,787 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2025-02-06 10:23:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 10:23:41,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2025-02-06 10:23:41,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:41,788 INFO L225 Difference]: With dead ends: 82 [2025-02-06 10:23:41,788 INFO L226 Difference]: Without dead ends: 82 [2025-02-06 10:23:41,788 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-06 10:23:41,788 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 19 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:41,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 182 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:23:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-02-06 10:23:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-02-06 10:23:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.25) internal successors, (70), 69 states have internal predecessors, (70), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-06 10:23:41,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2025-02-06 10:23:41,790 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 48 [2025-02-06 10:23:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:41,790 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2025-02-06 10:23:41,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-06 10:23:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2025-02-06 10:23:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-06 10:23:41,790 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:41,790 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:41,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-02-06 10:23:41,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:41,991 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:41,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:41,991 INFO L85 PathProgramCache]: Analyzing trace with hash 406861783, now seen corresponding path program 1 times [2025-02-06 10:23:41,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:41,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398820518] [2025-02-06 10:23:41,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:41,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:41,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:41,993 INFO L229 MonitoredProcess]: Starting monitored process 30 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 10:23:41,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-02-06 10:23:42,079 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-02-06 10:23:42,194 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-02-06 10:23:42,194 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:42,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:42,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-06 10:23:42,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:42,365 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 29 treesize of output 17 [2025-02-06 10:23:42,368 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 44 treesize of output 20 [2025-02-06 10:23:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:23:42,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:23:43,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 10:23:43,484 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 40 treesize of output 42 [2025-02-06 10:23:44,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 10:23:44,324 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 111 treesize of output 151 [2025-02-06 10:23:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:23:46,086 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:46,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398820518] [2025-02-06 10:23:46,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398820518] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:23:46,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 10:23:46,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2025-02-06 10:23:46,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398304339] [2025-02-06 10:23:46,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 10:23:46,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-06 10:23:46,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:46,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-06 10:23:46,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2025-02-06 10:23:46,087 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 22 states have internal predecessors, (58), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-06 10:23:50,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:50,623 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2025-02-06 10:23:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 10:23:50,624 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 22 states have internal predecessors, (58), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2025-02-06 10:23:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:50,625 INFO L225 Difference]: With dead ends: 88 [2025-02-06 10:23:50,625 INFO L226 Difference]: Without dead ends: 88 [2025-02-06 10:23:50,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2025-02-06 10:23:50,625 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:50,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 525 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2025-02-06 10:23:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-02-06 10:23:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2025-02-06 10:23:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 74 states have internal predecessors, (76), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-06 10:23:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2025-02-06 10:23:50,632 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 48 [2025-02-06 10:23:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:50,632 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2025-02-06 10:23:50,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 22 states have internal predecessors, (58), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-06 10:23:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2025-02-06 10:23:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-06 10:23:50,633 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:50,633 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:50,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-02-06 10:23:50,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:50,833 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:50,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash -272250495, now seen corresponding path program 1 times [2025-02-06 10:23:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:50,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614255368] [2025-02-06 10:23:50,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:50,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:50,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:50,836 INFO L229 MonitoredProcess]: Starting monitored process 31 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 10:23:50,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-02-06 10:23:50,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-06 10:23:50,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-06 10:23:50,942 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:50,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:50,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 10:23:50,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:23:50,978 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:50,978 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:50,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614255368] [2025-02-06 10:23:50,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614255368] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:50,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:50,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 10:23:50,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344793475] [2025-02-06 10:23:50,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:50,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 10:23:50,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:50,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 10:23:50,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-06 10:23:50,979 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-06 10:23:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:51,255 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2025-02-06 10:23:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 10:23:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2025-02-06 10:23:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:51,257 INFO L225 Difference]: With dead ends: 87 [2025-02-06 10:23:51,257 INFO L226 Difference]: Without dead ends: 87 [2025-02-06 10:23:51,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-02-06 10:23:51,258 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:51,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 146 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:23:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-02-06 10:23:51,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2025-02-06 10:23:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 73 states have internal predecessors, (75), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-06 10:23:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2025-02-06 10:23:51,262 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 49 [2025-02-06 10:23:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:51,262 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2025-02-06 10:23:51,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-06 10:23:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2025-02-06 10:23:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-06 10:23:51,262 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:51,263 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:51,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-02-06 10:23:51,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:51,464 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:51,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash -272250494, now seen corresponding path program 1 times [2025-02-06 10:23:51,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:51,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452372485] [2025-02-06 10:23:51,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:51,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:51,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:51,467 INFO L229 MonitoredProcess]: Starting monitored process 32 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 10:23:51,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-02-06 10:23:51,556 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-06 10:23:51,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-06 10:23:51,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:51,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:51,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 10:23:51,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:51,675 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 7 treesize of output 3 [2025-02-06 10:23:51,682 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 7 treesize of output 3 [2025-02-06 10:23:51,828 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 7 treesize of output 3 [2025-02-06 10:23:51,831 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 10:23:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 10:23:51,974 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:23:51,974 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 10:23:51,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452372485] [2025-02-06 10:23:51,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452372485] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:23:51,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:23:51,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-02-06 10:23:51,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074683369] [2025-02-06 10:23:51,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:23:51,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 10:23:51,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 10:23:51,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 10:23:51,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2025-02-06 10:23:51,975 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-06 10:23:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:23:52,705 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2025-02-06 10:23:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 10:23:52,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 49 [2025-02-06 10:23:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:23:52,707 INFO L225 Difference]: With dead ends: 85 [2025-02-06 10:23:52,707 INFO L226 Difference]: Without dead ends: 85 [2025-02-06 10:23:52,707 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2025-02-06 10:23:52,707 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-06 10:23:52,707 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 276 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-06 10:23:52,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-06 10:23:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2025-02-06 10:23:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 71 states have internal predecessors, (73), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-06 10:23:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2025-02-06 10:23:52,710 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 49 [2025-02-06 10:23:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:23:52,710 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2025-02-06 10:23:52,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-06 10:23:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2025-02-06 10:23:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-06 10:23:52,711 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:23:52,711 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:23:52,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2025-02-06 10:23:52,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:52,911 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_list_delErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2025-02-06 10:23:52,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:23:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash 421631264, now seen corresponding path program 1 times [2025-02-06 10:23:52,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 10:23:52,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224991412] [2025-02-06 10:23:52,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:23:52,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:23:52,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:23:52,914 INFO L229 MonitoredProcess]: Starting monitored process 33 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 10:23:52,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-02-06 10:23:52,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-06 10:23:53,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-06 10:23:53,040 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:23:53,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:23:53,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-02-06 10:23:53,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:23:53,136 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 10:23:53,214 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 10:23:53,215 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 10:23:53,679 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 10:23:53,702 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 10:23:53,869 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 21 treesize of output 20 [2025-02-06 10:23:53,908 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 21 treesize of output 20 [2025-02-06 10:23:54,107 INFO L349 Elim1Store]: treesize reduction 64, result has 32.6 percent of original size [2025-02-06 10:23:54,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 61 [2025-02-06 10:23:54,138 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 10:23:54,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 52 [2025-02-06 10:23:54,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2025-02-06 10:23:54,959 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-06 10:23:54,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2025-02-06 10:23:55,215 INFO L349 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2025-02-06 10:23:55,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 50 [2025-02-06 10:23:55,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 10:23:55,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2025-02-06 10:23:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:23:55,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:23:57,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 10:23:57,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2025-02-06 10:23:57,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 10:23:57,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 48 [2025-02-06 10:23:57,918 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 5 treesize of output 3 [2025-02-06 10:23:57,949 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 10:23:57,953 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 97 treesize of output 89 [2025-02-06 10:23:59,608 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 1178 treesize of output 1162 [2025-02-06 10:23:59,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 10:23:59,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 340 treesize of output 254 [2025-02-06 10:23:59,836 INFO L349 Elim1Store]: treesize reduction 44, result has 48.2 percent of original size [2025-02-06 10:23:59,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 350 treesize of output 348 [2025-02-06 10:23:59,862 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 300 treesize of output 280 [2025-02-06 10:24:02,272 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-06 10:24:02,439 INFO L349 Elim1Store]: treesize reduction 44, result has 48.2 percent of original size [2025-02-06 10:24:02,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 19999 treesize of output 19275 [2025-02-06 10:24:06,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 10:24:06,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 9496 treesize of output 9224